Brussels warns Russia on EU unity
The tension at the summit was palpable, one EU official saidEuropean Commission President Jose Manuel Barroso has told Russia that any problems it has with an individual EU state are problems with the whole bloc.
Speaking at an EU-Russian summit, Mr Barroso said the EU was based on principles of solidarity.
The summit, near the city of Samara, was marred by Moscow's rows with countries including Estonia and Poland.
Disputes between Moscow and Brussels have also arisen over the status of Kosovo, energy supplies and trade.
Friday, May 18, 2007
Tuesday, May 15, 2007
16 atoll have been flooded by today's tidal wave.
More than 60 islands in 16 Atolls affected
Latest reports are that more than 60 islands in 16 Atolls have been flooded by today's tidal wave. Despite claims by authorities to the contrary, all islanders are complaining about the long delay in getting help from them.
Latest reports are that more than 60 islands in 16 Atolls have been flooded by today's tidal wave. Despite claims by authorities to the contrary, all islanders are complaining about the long delay in getting help from them.
Huvadhu Atoll was very badly hit by the tidal wave on Tuesday
G Dh. Nadella was severly hit by tidal waveNadella in Huvadhu Atoll was very badly hit by the tidal wave on Tuesday. Almost all homes in the island are flooded and they also complained that the authorities were slow in responding to their call for help. An MDP team from Thinadhoo visited the island to find out the extent of damage and to offer any possible assistance
about the island
Geography
The island of Knaditheemu lies in the North West of the atoll. The island is located at 6 26'N and 72 54'E latitude and longitude respectively. The island has a big lagoon on the northern and southern end of the island which facilitate easy harbouring. The total land area of the island is 89 hectres. Kanditheemu is given the code C1.
Population
At the end of February 2003, the total population of Knaditheemu was 1163 with 574 females and 589 males. This population is resident in 179 houses.
Population of Kanditheem at the end of 2003 in age group Male Female
Under 16 years 273 293
16 to 65 years 286 277
Over 65 years 37 14
Standard of living and economic status
The main occupation of the people of Kanditheemu is fishing. In addition, few people are engaged in occupations such as carpentry, masonry. Mid level professional workers are found in the school, health facilities, island office and island court. The island has 24 mechanised fishing vessels, 3 transport vessels which travel to Male for cargo and passenger lifting. It has 13 retail shops and 3 cafe's.
With the income earned from the various occupations, improvements seen in the living standard of the island is noteworthy. With the generous contribution of the government and community, their hard work and commitment, the island harbour has been built with water break wall and jetty. This has paved way to further develop fishing and travel for economic activity. The people of the island express satisfaction for these developments.
Health Services
Basic level health care is made available by the establishment of a health post facility jointly by the government and the island community. Health care is provided by a team consisting of a medical doctor, a Community Health Worker, Family Health Workers and trained birth attendants. A community run pharmacy service is available in the island.
Kanditheem Health centre
The island of Knaditheemu lies in the North West of the atoll. The island is located at 6 26'N and 72 54'E latitude and longitude respectively. The island has a big lagoon on the northern and southern end of the island which facilitate easy harbouring. The total land area of the island is 89 hectres. Kanditheemu is given the code C1.
Population
At the end of February 2003, the total population of Knaditheemu was 1163 with 574 females and 589 males. This population is resident in 179 houses.
Population of Kanditheem at the end of 2003 in age group Male Female
Under 16 years 273 293
16 to 65 years 286 277
Over 65 years 37 14
Standard of living and economic status
The main occupation of the people of Kanditheemu is fishing. In addition, few people are engaged in occupations such as carpentry, masonry. Mid level professional workers are found in the school, health facilities, island office and island court. The island has 24 mechanised fishing vessels, 3 transport vessels which travel to Male for cargo and passenger lifting. It has 13 retail shops and 3 cafe's.
With the income earned from the various occupations, improvements seen in the living standard of the island is noteworthy. With the generous contribution of the government and community, their hard work and commitment, the island harbour has been built with water break wall and jetty. This has paved way to further develop fishing and travel for economic activity. The people of the island express satisfaction for these developments.
Health Services
Basic level health care is made available by the establishment of a health post facility jointly by the government and the island community. Health care is provided by a team consisting of a medical doctor, a Community Health Worker, Family Health Workers and trained birth attendants. A community run pharmacy service is available in the island.
Kanditheem Health centre
about......history
The Dead Sea ((Arabic: البحر الميت), Hebrew: ים המלח, translated as Sea of Salt), is the Earth's lowest point not covered by water or ice, at 418 m (1,371 feet) below sea level and falling,[2] and the deepest hypersaline lake in the world, at 330 m (1,083 feet) deep. It is the second saltiest body of water on Earth, with a salinity of about 30 percent.[3] Only Lake Asal (Djibouti) has a higher salinity. This is about 8.6 times greater than average ocean salinity. It measures 67 km (42 miles) long, 18 km (11 miles) wide at its widest point, and is located on the border between Israel, The West Bank, and Jordan and lies in the Jordan Rift Valley. The main tributary is the Jordan River.
The Dead Sea has attracted interest and visitors from around the Mediterranean basin for thousands of years. It was a place of refuge for King David, one of the world's first health resorts (for Herod the Great), and it has been the supplier of products as diverse as balms for Egyptian mummification to potash for fertilizers.
In Hebrew the Dead Sea is called the Yam ha-Melakh (help·info) - meaning "sea of salt," or Yam ha-Mavet, "sea of death." In past times it was the "Eastern Sea" or the "Sea of Arava." To the Greeks, the Dead Sea was "Lake Asphaltites" (see below). In Arabic the Dead Sea is called al-Bahr al-Mayyit (help·info) ("the Dead Sea"), or less commonly Bahr Lūţ ("the Sea of Lot"). Historically, another Arabic name was the "Sea of Zoar," after a nearby town.
Contents [hide]
1 Natural history
2 Climatic features
3 Therapies popular at Dead Sea
4 Chemistry and health effects
5 Flora and fauna
6 Human history
7 Potash and salt works
8 Recession of the Dead Sea
9 Water attractions
10 Related global extremes
11 See also
12 Further reading
13 Notes
14 External links
[edit] Natural history
Satellite photograph showing the location of the Dead SeaThe Dead Sea is located in the Dead Sea Rift, which is part of a long fissure in the Earth's surface called the Great Rift Valley. The 6,000 km (3,700 mile) long Great Rift Valley extends from the Taurus Mountains of Turkey to the Zambezi Valley in southern Africa. The Great Rift Valley formed in Miocene times as a result of the Arabian Plate moving northward and then eastward away from the African Plate.
Around three million years ago what is now the valley of the Jordan River, Dead Sea, and Wadi Arabah was repeatedly inundated by waters from the Red Sea. The waters formed in a narrow, crooked bay which was connected to the sea through what is now the Jezreel Valley. The floods of the valley came and went depending on long scale climatic change. The lake that occupied the Dead Sea Rift, named "Lake Sodom", deposited beds of salt, eventually coming to be 3 km (2 miles) thick.
According to geological theory, approximately two million years ago the land between the Rift Valley and the Mediterranean Sea rose to such an extent that the ocean could no longer flood the area. Thus, the long bay became a long lake.
The first such prehistoric lake is named "Lake Gomorrah." Lake Gomorrah was a freshwater or brackish lake that extended at least 80 km (50 miles) south of the current southern end of the Dead Sea and 100 km (60 mi) north, well above the present Hula Depression. As the climate turned more arid, Lake Gomorrah shrank and became saltier. The large, saltwater predecessor of the Dead Sea is called "Lake Lisan."
Mount Sedom, on the southwest side of the lake, is a giant mountain of halite.In prehistoric times great amounts of sediment collected on the floor of Lake Gomorrah. The sediment was heavier than the salt deposits and squeezed the salt deposits upwards into what are now the Lisan Peninsula and Mount Sedom (on the southwest side of the lake). Geologists explain the effect in terms of a bucket of mud into which a large flat stone is placed, forcing the mud to creep up the sides of the pail. When the floor of the Dead Sea dropped further due to tectonic forces the salt mounts of Lisan and Mount Sedom stayed in place as high cliffs. (see salt domes)
During 70,000 to 12,000 years ago the lake level was a 100-250 m higher than its current level. This lake was termed "Lake Lisan", which fluctuated dramatically with rising to highest level around 26,000 years ago, indicating very wet climate in the Near East. Sometime around 10,000 years ago the lake level dropped dramatically, probably to levels even lower than today. During the last several thousand years the lake has fluctuated approximately 400 m with some significant drops and rises.
The Jordan River is the only major stream flowing into Dead Sea. There are no outlet streams.
The northern part of the Dead Sea receives scarcely 100 mm (4 in) of rain a year. The southern section barely 50 mm (2 in). The Dead Sea zone's aridity is due to the rainshadow effect of the Judean Hills. The highlands east of the Dead Sea receive more rainfall than the Dead Sea itself.
The mountains of the western side, the Judean Hills, rise less steeply from the Dead Sea than do the mountains of the eastern side. The mountains of the eastern side are also much higher. Along the southwestern side of the lake is a 210 m (700 ft) tall halite formation called "Mount Sedom".
[edit] Climatic features
The Dead Sea has a climate which boasts year-round sunny skies and dry, lowly-polluted air. It has less than 50mm mean annual rainfall and a summer average temperature between 32 and 39 degrees Celsius. The Winter average temperature is between 20 and 23 degrees Celsius. The region has weakened UV radiation, particularly the UVB (erythrogenic rays) and a high oxygen content due to the high barometric pressure. The shore is the lowest dry place in the world.[citation needed]
[edit] Therapies popular at Dead Sea
Climatotherapy:- Treatment which exploits local climatic features such as temperature, humidity, sunshine, Barometric pressure and special Atmospheric constituents.
Heliotherapy:- Treatment that exploits the biological effects of the sun's radiation.
Thalassotherapy:- Treatment that exploits bathing in Dead Sea water.
Balneotherapy:- Treatment that exploits black mineral mud of the Dead Sea.[4]
[edit] Chemistry and health effects
A tourist demonstrates the unusual buoyancy caused by high salinity.
A rough Dead Sea, with salt deposits on cliffs.Until the winter of 1978-1979, the Dead Sea was composed of two stratified layers of water that differed in temperature, density, age, and salinity. The topmost 35 meters or so of the Dead Sea had a salinity that ranged between 300 and 400 parts per thousand and a temperature that swung between 19 °C (66 °F) and 37 °C (98 °F). Underneath a zone of transition, the lowest level of the Dead Sea had waters of a consistent 22 °C (72 °F) temperature and complete saturation of sodium chloride (NaCl).[citations needed] Since the water near the bottom is saturated, the salt precipitates out of solution onto the sea floor.
Beginning in the 1960s water inflow to the Dead Sea from the Jordan River was reduced as a result of large-scale irrigation and generally low rainfall. By 1975 the upper water layer of the Dead Sea was actually saltier than the lower layer. The upper layer nevertheless remained suspended above the lower layer because its waters were warmer and thus less dense. When the upper layer finally cooled down so that its density was greater than the lower layer the waters of the Dead Sea mixed. For the first time in centuries the lake was a homogeneous body of water. Since then stratification has begun to redevelop.[5]
The mineral content of the Dead Sea is significantly different from that of ocean water, consisting of approximately 53% magnesium chloride, 37% potassium chloride and 8% sodium chloride (common salt) with the remainder comprised of various trace elements.
The concentration of sulfate, SO42-, ions is very low, and the bromide ion concentration is the highest of all waters on Earth. Chlorides neutralize most of the calcium ions in the Dead Sea and its surroundings. While in other seas sodium chloride is 97% of the salts, in the Dead Sea the quantity of NaCl is only 12-18%.
Comparison between the chemical composition of the Dead Sea to other lakes and oceans show that the salt concentration in the Dead Sea is 31.5% (the salinity fluctuates somewhat). Because of its unusually high concentration of salt, anyone can easily float in the Dead Sea because of natural buoyancy as a result of the higher density of the water. In this aspect, the Dead Sea is similar to the Great Salt Lake in Utah, in the United States.
Dead Sea in the EveningOne of the most unusual properties of the Dead Sea is its discharge of asphalt. From deep seeps, the Dead Sea constantly spits up small pebbles of the black substance. After earthquakes, chunks as large as houses may be produced.
The Dead Sea area has become a major center for health research and treatment for several reasons. The mineral content of the waters, the very low content of pollens and other allergens in the atmosphere, the reduced ultraviolet component of solar radiation, and the higher atmospheric pressure at this great depth each have specific health effects. For example: persons suffering reduced respiratory function from diseases such as cystic fibrosis, seem to benefit from the increased atmospheric pressure.[citation needed]
Sufferers of the skin disorder psoriasis also benefit from the ability to sunbathe for long periods in the area due to its position below sea level and subsequent result that many of the sun's harmful UV rays are reduced. Furthermore, Dead Sea salt has been found to be beneficial to psoriasis patients.[6]
[edit] Flora and fauna
Dead Sea in the morning, seen from MasadaThe sea is called "dead" because its high salinity means no fish or macroscopic aquatic organisms can live in it, though minuscule quantities of bacteria and microbial fungi are present.
In times of flood the salt content of the Dead Sea can drop from its usual 35% salinity to 30% or lower. In the wakes of rainy winters the Dead Sea temporarily comes to life. In 1980, after one such rainy winter, the normally dark blue Dead Sea turned red. Researchers from Hebrew University found the Dead Sea to be teeming with a type of algae called Dunaliella. The Dunaliella in turn nourished carotenoid-containing (red-pigmented) halobacteria whose presence is responsible for the color change. Since 1980 the Dead Sea basin has been dry and the algae and the bacteria have not returned in measurable numbers.
Many animal species make their homes in the mountains surrounding the Dead Sea. A hiker can see camels, ibex, hares, hyraxes, jackals, foxes, and even leopards. Hundreds of bird species inhabit the zone as well. Both Jordan and Israel have established nature reserves around the Dead Sea.
The delta of the Jordan river was formerly a veritable jungle of papyrus and palm trees. Flavius Josephus described Jericho as "the most fertile spot in Judea". In Roman and Byzantine times sugarcane, henna, and sycamore all made the lower Jordan valley quite wealthy. One of the most valuable products produced by Jericho was the sap of the balsam tree, which could be made into perfume.
By the nineteenth century Jericho's fertility was a thing of the past.
[edit] Human history
World's lowest (dry) point, 1971The human history of the Dead Sea goes all the way back to remote antiquity. Just north of the Dead Sea is Jericho, the oldest continually occupied town in the world. Somewhere, perhaps on the Dead Sea's southeast shore, are the cities mentioned in the Book of Genesis which were destroyed in the times of Abraham: Sodom and Gomorra and the three other "Cities of the Plain" - Admah, Zeboim and Zoar (Deuteronomy 29:23). King David hid from Saul at Ein Gedi nearby.
The Greeks knew the Dead Sea as "Lake Asphaltites", due to the naturally surfacing asphalt. Aristotle wrote about the remarkable waters. During the Egyptian conquest it is said that Queen Cleopatra obtained exclusive rights to build cosmetic and pharmaceutical factories in the area. Later, the Nabateans discovered the value of bitumen extracted from the Dead Sea needed by the Egyptians for embalming their mummies.
Prominent personages linked with the Dead Sea and its surroundings are Herod the Great, Jesus of Nazareth, and John the Baptist. Also in Roman times some Essenes had settled on the Dead Sea's western shore; Pliny the Elder identifies their location with the words, "on the west side of the Dead Sea, away from the coast ... [above] the town of Engeda" (Natural History, Bk 5.73); and it is therefore a hugely popular though not uncontested hypothesis today, that same Essenes are identical with the settlers at Qumran and that "the Dead Sea Scrolls" discovered during the 20th century in the nearby caves had been their own library.
King Herod the Great built/re-built several fortresses and palaces on the Western Bank of the Dead Sea. The most famous was Masada, where, in 66-70 AD, a small group of rebellious Jewish zealots held out against the might of the Roman Legion, and Machaerus where, it has been argued from the Gospel according to Luke 3:20, that John the Baptist had been imprisoned by Herod Antipas and met his death.
The remoteness of the region attracted Greek Orthodox monks since the Byzantine era. Their monasteries such as Saint George in Wadi Kelt and Mar Saba in the Judean Desert are places of pilgrimage.
In Islamic tradition, the Dead Sea was about the land in which the Prophet Lut (Lot in the Hebrew scriptures) lived. His tribe had done wrong (act of homosexuality) and had therefore been given a punishment for such deeds. The punishment arrived when angels were sent down by Allah to Lut. The angels raised the land where the prophet's tribe lived and threw it back into the ground, causing the ground near the impact to cave in. Thus, the lowest land on Earth was formed because of this punishment. The sinners were destroyed and the followers were saved. According to some interpretation, the sura of ar-Rum of the Quran refers to the Dead Sea as the lowest place on earth [1].
Bedouin tribes have continuously lived in this area, and more recently explorers and scientists arrived to analyze the minerals and conduct research into the unique climate. Tourism in the region has been developed since the 1960s.
The world's lowest road, Route 90 (Israel), runs along the Israeli and Palestinian (West Bank) shores of the Dead Sea at 393 m below sea level.
[edit] Potash and salt works
View of salt evaporation pans on the Dead Sea, taken in 1989 from the Space Shuttle Columbia. The southern half is now separated from the northern half at what used to be the Lisan Peninsula because of the fall of the level of Dead Sea.In the early part of the 20th century, the Dead Sea began to attract interest from chemists who deduced that the Sea was a natural deposit of potash and bromine. The Palestine Potash Company was chartered in 1929 (after its founder, Moses Novomeysky, a Jewish engineer from Siberia, worked for the charter for over ten years). The first plant was on the north shore of the Dead Sea at Kalia and produced potash, or potassium chloride, by solar evaporation of the brine. Employing Arabs and Jews, it was an island of peace in turbulent times. The company quickly grew into the largest industrial site in the Middle East[citation needed] and in 1934 built a second plant on the southwest shore, in the Sodom area, south of the 'Lashon' region of the Dead Sea. The Dead Sea Works Ltd. was established in 1952 as a state-owned company to extract potash and other minerals from the Dead Sea.
From the Dead Sea brine, Israel produces (2001) 1.77 million tons potash, 206,000 tons elemental bromine, 44,900 tons caustic soda, 25,000 tons magnesium metal, and sodium chloride. On the Jordanian side of the Dead Sea, Arab Potash (APC), formed in 1956, produces 2.0 million tons of potash annually, as well as sodium chloride and bromine. Both companies use extensive salt evaporation pans that have essentially diked the entire southern end of the Dead Sea for the purpose of producing carnallite, potassium magnesium chloride, which is then processed further to produce potassium chloride. The power plant on the Israeli side allows production of magnesium metal (by a subsidiary, Dead Sea Magnesium Ltd.). The salt evaporation pans are visible from space.
[edit] Recession of the Dead Sea
Dead Sea at Dusk (from Suwayma, Jordan)
Sinkholes at Mineral BeachIn recent decades, the Dead Sea has been rapidly shrinking because of diversion of incoming water. From an elevation of 395 m below sea level in 1970 [7] it fell 22 m to 418 m below sea level in 2006, reaching a drop rate of 1 m per year. Although the Dead Sea may never entirely disappear, because evaporation slows down as surface area decreases and salinity increases, it is feared that the Dead Sea may substantially change its characteristics.
The Dead Sea level drop has been followed by a groundwater level drop, causing brines that used to occupy underground layers near the shoreline to be flushed out by freshwater. This is believed to be the cause of the recent appearance of large sinkholes along the western shore – incoming freshwater dissolves salt layers, rapidly creating subsurface cavities that subsequently collapse to form these sinkholes.[8]
One of the plans which were suggested as a means to stop the recession of the Dead Sea is to channel water from the Mediterranean or the Red Sea, either through tunnels or canals (the Dead Sea Canal). Although a Mediterranean structure would be shorter, Israel is now committed to building a Red Sea canal in deference to Jordan's needs. The plan is to pump water 120 m up the Arava/Arabah from Aqaba or Eilat, tunnel under the highest point of the Arava/Arabah valley, and then canalize the river of seawater as it falls 520 m to the Dead Sea. The desalination plant would be constructed in Jordan.
On May 9, 2005, Jordan, Israel, and the Palestinian Authority signed an agreement to begin feasibility studies on the project, to be officially known as the "Two Seas Canal". The scheme calls for the production of 870 million cubic metres of fresh water per year and 550 megawatts of electricity. The World Bank is supportive of the project. However, several environmental groups have raised concerns about possible negative impacts of the project on the natural environment of the Dead Sea and Arava.
[edit] Water attractions
Besides the unique water of the Dead Sea itself, there are also health spas and hot springs along the shore. On the Jordanian side there are the Dead Sea Marriott and The Movenpick resorts. Both are equipped with spas and multiple restaurants, etc. 2007 saw a Kempinski Hotel under construction alongside. There is also the Israeli Atractziah Water Park (across from Kalia Kibbutz) and swimming pools in the large Hotel Resort.
[edit] Related global extremes
West Antarctica's Don Juan Pond has a greater salinity than the Dead Sea, at 18 times ocean salinity.
The deepest point on the Earth's crust is the Mariana Trench, a submarine trench in the western Pacific Ocean.
There are ice-covered depressions on the continent of Antarctica that are deeper than the Dead Sea (such as the Bentley Subglacial Trench).
The world's deepest lake is Lake Baikal in Siberia, Russia.
[edit] See also
The Dead Sea regionDead Sea Canal
Two Seas Canal
List of places on land with elevations below sea level
Great Salt Lake
[edit] Further reading
Yehouda Enzel, et al, eds (2006) New Frontiers in Dead Sea Paleoenvironmental Research, Geological Society of America, ISBN 0-8137-2401-5 [2]
Niemi, Tina M., Ben-Avraham, Z., and Gat, J., eds., 1997, The Dead Sea: The Lake and Its Setting: N.Y., Oxford University Press, 286 p.
[edit] Notes
^ Dead Sea Data Summary. International Lake Environment Committee Foundation.
^ Monitoring of the Dead Sea. Israel Marine Data Center (ISRAMAR).
^ Goetz, P.W. (ed.) The New Encyclopaedia Britannica (15th ed.). Vol. 3, p. 937. Chicago, 1986.
^ DAV school magazine vol.IV (March-April 2005)
^ http://www.american.edu/TED/deadsea.htm
^ S. Halevy et al. Dead sea bath salt for the treatment of psoriasis vulgaris: a double-blind controlled study. Journal of the European Academy of Dermatology and Venereology, Volume 9, Issue 3: 237-242.
^ C. Klein, A. Flohn, Contribution to the Knowledge in the Fluctuations of the Dead Sea Level. Theoretical and Applied Climatology, vol. 38, p. 151–156, 1987
^ M. Abelson, Y. Yechieli, O. Crouvi, G. Baer, D. Wachs, A. Bein, V. Shtivelman. "Evolution of the Dead Sea Sinkholes", in New Frontiers in Dead Sea Paleoenvironmental Research, Geological Society of America, special paper 401, p. 241–253, 2006
[edit] External links
Wikimedia Commons has media related to:
Dead SeaThe official Israeli site
Ezekiel's Water Project
Race is on to save the Dead Sea
A Web Documentary On The Dead Sea
Multilateral project for sustainable water management in the lower Jordan Valley
Retrieved from "http://en.wikipedia.org/wiki/Dead_Sea"
Categories: Articles with unsourced statements since April 2007 | All articles with unsourced statements | Articles with unsourced statements since February 2007 | Dry areas below sea level | Endorheic lakes | Extreme points of the world | Geography of Jordan | Geography of Palestine | Great Rift Valley lakes | Guinness World Record | Jewish history | Lakes of Israel | New Testament places | Seas | Shrunken lakes | Tanakh places | West Bank
ViewsArticle Discussion Edit this page History Personal toolsSign in / create account Navigation
Main page
Contents
Featured content
Current events
Random article
interaction
About Wikipedia
Community portal
Recent changes
Upload file
Contact us
Make a donation
Help
Search
Toolbox
What links here
Related changes
Upload file (no wizard)
Special pages
Printable version
Permanent link
Cite this article
In other languages
Беларуская (тарашкевіца)
فارسی
العربية
Aragonés
Asturianu
Bosanski
Български
Català
Česky
Cymraeg
Dansk
Deutsch
Eesti
Ελληνικά
Español
Esperanto
Français
Gaeilge
Galego
한국어
Hrvatski
Bahasa Indonesia
Íslenska
Italiano
עברית
Latviešu
Lëtzebuergesch
Lietuvių
Македонски
Bahasa Melayu
Nederlands
日本語
Norsk (bokmål)
Polski
Português
Română
Русский
Simple English
Slovenčina
Slovenščina
Српски / Srpski
Suomi
Svenska
தமிழ்
ไทย
Tiếng Việt
Українська
中文
ייִדיש
This page was last modified 22:21, 15 May 2007. All text is available under the terms of the GNU Free Documentation License. (See Copyrights for details.)
Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a US-registered 501(c)(3) tax-deductible nonprofit charity.
Privacy policy About Wikipedia Disclaimers
The Dead Sea has attracted interest and visitors from around the Mediterranean basin for thousands of years. It was a place of refuge for King David, one of the world's first health resorts (for Herod the Great), and it has been the supplier of products as diverse as balms for Egyptian mummification to potash for fertilizers.
In Hebrew the Dead Sea is called the Yam ha-Melakh (help·info) - meaning "sea of salt," or Yam ha-Mavet, "sea of death." In past times it was the "Eastern Sea" or the "Sea of Arava." To the Greeks, the Dead Sea was "Lake Asphaltites" (see below). In Arabic the Dead Sea is called al-Bahr al-Mayyit (help·info) ("the Dead Sea"), or less commonly Bahr Lūţ ("the Sea of Lot"). Historically, another Arabic name was the "Sea of Zoar," after a nearby town.
Contents [hide]
1 Natural history
2 Climatic features
3 Therapies popular at Dead Sea
4 Chemistry and health effects
5 Flora and fauna
6 Human history
7 Potash and salt works
8 Recession of the Dead Sea
9 Water attractions
10 Related global extremes
11 See also
12 Further reading
13 Notes
14 External links
[edit] Natural history
Satellite photograph showing the location of the Dead SeaThe Dead Sea is located in the Dead Sea Rift, which is part of a long fissure in the Earth's surface called the Great Rift Valley. The 6,000 km (3,700 mile) long Great Rift Valley extends from the Taurus Mountains of Turkey to the Zambezi Valley in southern Africa. The Great Rift Valley formed in Miocene times as a result of the Arabian Plate moving northward and then eastward away from the African Plate.
Around three million years ago what is now the valley of the Jordan River, Dead Sea, and Wadi Arabah was repeatedly inundated by waters from the Red Sea. The waters formed in a narrow, crooked bay which was connected to the sea through what is now the Jezreel Valley. The floods of the valley came and went depending on long scale climatic change. The lake that occupied the Dead Sea Rift, named "Lake Sodom", deposited beds of salt, eventually coming to be 3 km (2 miles) thick.
According to geological theory, approximately two million years ago the land between the Rift Valley and the Mediterranean Sea rose to such an extent that the ocean could no longer flood the area. Thus, the long bay became a long lake.
The first such prehistoric lake is named "Lake Gomorrah." Lake Gomorrah was a freshwater or brackish lake that extended at least 80 km (50 miles) south of the current southern end of the Dead Sea and 100 km (60 mi) north, well above the present Hula Depression. As the climate turned more arid, Lake Gomorrah shrank and became saltier. The large, saltwater predecessor of the Dead Sea is called "Lake Lisan."
Mount Sedom, on the southwest side of the lake, is a giant mountain of halite.In prehistoric times great amounts of sediment collected on the floor of Lake Gomorrah. The sediment was heavier than the salt deposits and squeezed the salt deposits upwards into what are now the Lisan Peninsula and Mount Sedom (on the southwest side of the lake). Geologists explain the effect in terms of a bucket of mud into which a large flat stone is placed, forcing the mud to creep up the sides of the pail. When the floor of the Dead Sea dropped further due to tectonic forces the salt mounts of Lisan and Mount Sedom stayed in place as high cliffs. (see salt domes)
During 70,000 to 12,000 years ago the lake level was a 100-250 m higher than its current level. This lake was termed "Lake Lisan", which fluctuated dramatically with rising to highest level around 26,000 years ago, indicating very wet climate in the Near East. Sometime around 10,000 years ago the lake level dropped dramatically, probably to levels even lower than today. During the last several thousand years the lake has fluctuated approximately 400 m with some significant drops and rises.
The Jordan River is the only major stream flowing into Dead Sea. There are no outlet streams.
The northern part of the Dead Sea receives scarcely 100 mm (4 in) of rain a year. The southern section barely 50 mm (2 in). The Dead Sea zone's aridity is due to the rainshadow effect of the Judean Hills. The highlands east of the Dead Sea receive more rainfall than the Dead Sea itself.
The mountains of the western side, the Judean Hills, rise less steeply from the Dead Sea than do the mountains of the eastern side. The mountains of the eastern side are also much higher. Along the southwestern side of the lake is a 210 m (700 ft) tall halite formation called "Mount Sedom".
[edit] Climatic features
The Dead Sea has a climate which boasts year-round sunny skies and dry, lowly-polluted air. It has less than 50mm mean annual rainfall and a summer average temperature between 32 and 39 degrees Celsius. The Winter average temperature is between 20 and 23 degrees Celsius. The region has weakened UV radiation, particularly the UVB (erythrogenic rays) and a high oxygen content due to the high barometric pressure. The shore is the lowest dry place in the world.[citation needed]
[edit] Therapies popular at Dead Sea
Climatotherapy:- Treatment which exploits local climatic features such as temperature, humidity, sunshine, Barometric pressure and special Atmospheric constituents.
Heliotherapy:- Treatment that exploits the biological effects of the sun's radiation.
Thalassotherapy:- Treatment that exploits bathing in Dead Sea water.
Balneotherapy:- Treatment that exploits black mineral mud of the Dead Sea.[4]
[edit] Chemistry and health effects
A tourist demonstrates the unusual buoyancy caused by high salinity.
A rough Dead Sea, with salt deposits on cliffs.Until the winter of 1978-1979, the Dead Sea was composed of two stratified layers of water that differed in temperature, density, age, and salinity. The topmost 35 meters or so of the Dead Sea had a salinity that ranged between 300 and 400 parts per thousand and a temperature that swung between 19 °C (66 °F) and 37 °C (98 °F). Underneath a zone of transition, the lowest level of the Dead Sea had waters of a consistent 22 °C (72 °F) temperature and complete saturation of sodium chloride (NaCl).[citations needed] Since the water near the bottom is saturated, the salt precipitates out of solution onto the sea floor.
Beginning in the 1960s water inflow to the Dead Sea from the Jordan River was reduced as a result of large-scale irrigation and generally low rainfall. By 1975 the upper water layer of the Dead Sea was actually saltier than the lower layer. The upper layer nevertheless remained suspended above the lower layer because its waters were warmer and thus less dense. When the upper layer finally cooled down so that its density was greater than the lower layer the waters of the Dead Sea mixed. For the first time in centuries the lake was a homogeneous body of water. Since then stratification has begun to redevelop.[5]
The mineral content of the Dead Sea is significantly different from that of ocean water, consisting of approximately 53% magnesium chloride, 37% potassium chloride and 8% sodium chloride (common salt) with the remainder comprised of various trace elements.
The concentration of sulfate, SO42-, ions is very low, and the bromide ion concentration is the highest of all waters on Earth. Chlorides neutralize most of the calcium ions in the Dead Sea and its surroundings. While in other seas sodium chloride is 97% of the salts, in the Dead Sea the quantity of NaCl is only 12-18%.
Comparison between the chemical composition of the Dead Sea to other lakes and oceans show that the salt concentration in the Dead Sea is 31.5% (the salinity fluctuates somewhat). Because of its unusually high concentration of salt, anyone can easily float in the Dead Sea because of natural buoyancy as a result of the higher density of the water. In this aspect, the Dead Sea is similar to the Great Salt Lake in Utah, in the United States.
Dead Sea in the EveningOne of the most unusual properties of the Dead Sea is its discharge of asphalt. From deep seeps, the Dead Sea constantly spits up small pebbles of the black substance. After earthquakes, chunks as large as houses may be produced.
The Dead Sea area has become a major center for health research and treatment for several reasons. The mineral content of the waters, the very low content of pollens and other allergens in the atmosphere, the reduced ultraviolet component of solar radiation, and the higher atmospheric pressure at this great depth each have specific health effects. For example: persons suffering reduced respiratory function from diseases such as cystic fibrosis, seem to benefit from the increased atmospheric pressure.[citation needed]
Sufferers of the skin disorder psoriasis also benefit from the ability to sunbathe for long periods in the area due to its position below sea level and subsequent result that many of the sun's harmful UV rays are reduced. Furthermore, Dead Sea salt has been found to be beneficial to psoriasis patients.[6]
[edit] Flora and fauna
Dead Sea in the morning, seen from MasadaThe sea is called "dead" because its high salinity means no fish or macroscopic aquatic organisms can live in it, though minuscule quantities of bacteria and microbial fungi are present.
In times of flood the salt content of the Dead Sea can drop from its usual 35% salinity to 30% or lower. In the wakes of rainy winters the Dead Sea temporarily comes to life. In 1980, after one such rainy winter, the normally dark blue Dead Sea turned red. Researchers from Hebrew University found the Dead Sea to be teeming with a type of algae called Dunaliella. The Dunaliella in turn nourished carotenoid-containing (red-pigmented) halobacteria whose presence is responsible for the color change. Since 1980 the Dead Sea basin has been dry and the algae and the bacteria have not returned in measurable numbers.
Many animal species make their homes in the mountains surrounding the Dead Sea. A hiker can see camels, ibex, hares, hyraxes, jackals, foxes, and even leopards. Hundreds of bird species inhabit the zone as well. Both Jordan and Israel have established nature reserves around the Dead Sea.
The delta of the Jordan river was formerly a veritable jungle of papyrus and palm trees. Flavius Josephus described Jericho as "the most fertile spot in Judea". In Roman and Byzantine times sugarcane, henna, and sycamore all made the lower Jordan valley quite wealthy. One of the most valuable products produced by Jericho was the sap of the balsam tree, which could be made into perfume.
By the nineteenth century Jericho's fertility was a thing of the past.
[edit] Human history
World's lowest (dry) point, 1971The human history of the Dead Sea goes all the way back to remote antiquity. Just north of the Dead Sea is Jericho, the oldest continually occupied town in the world. Somewhere, perhaps on the Dead Sea's southeast shore, are the cities mentioned in the Book of Genesis which were destroyed in the times of Abraham: Sodom and Gomorra and the three other "Cities of the Plain" - Admah, Zeboim and Zoar (Deuteronomy 29:23). King David hid from Saul at Ein Gedi nearby.
The Greeks knew the Dead Sea as "Lake Asphaltites", due to the naturally surfacing asphalt. Aristotle wrote about the remarkable waters. During the Egyptian conquest it is said that Queen Cleopatra obtained exclusive rights to build cosmetic and pharmaceutical factories in the area. Later, the Nabateans discovered the value of bitumen extracted from the Dead Sea needed by the Egyptians for embalming their mummies.
Prominent personages linked with the Dead Sea and its surroundings are Herod the Great, Jesus of Nazareth, and John the Baptist. Also in Roman times some Essenes had settled on the Dead Sea's western shore; Pliny the Elder identifies their location with the words, "on the west side of the Dead Sea, away from the coast ... [above] the town of Engeda" (Natural History, Bk 5.73); and it is therefore a hugely popular though not uncontested hypothesis today, that same Essenes are identical with the settlers at Qumran and that "the Dead Sea Scrolls" discovered during the 20th century in the nearby caves had been their own library.
King Herod the Great built/re-built several fortresses and palaces on the Western Bank of the Dead Sea. The most famous was Masada, where, in 66-70 AD, a small group of rebellious Jewish zealots held out against the might of the Roman Legion, and Machaerus where, it has been argued from the Gospel according to Luke 3:20, that John the Baptist had been imprisoned by Herod Antipas and met his death.
The remoteness of the region attracted Greek Orthodox monks since the Byzantine era. Their monasteries such as Saint George in Wadi Kelt and Mar Saba in the Judean Desert are places of pilgrimage.
In Islamic tradition, the Dead Sea was about the land in which the Prophet Lut (Lot in the Hebrew scriptures) lived. His tribe had done wrong (act of homosexuality) and had therefore been given a punishment for such deeds. The punishment arrived when angels were sent down by Allah to Lut. The angels raised the land where the prophet's tribe lived and threw it back into the ground, causing the ground near the impact to cave in. Thus, the lowest land on Earth was formed because of this punishment. The sinners were destroyed and the followers were saved. According to some interpretation, the sura of ar-Rum of the Quran refers to the Dead Sea as the lowest place on earth [1].
Bedouin tribes have continuously lived in this area, and more recently explorers and scientists arrived to analyze the minerals and conduct research into the unique climate. Tourism in the region has been developed since the 1960s.
The world's lowest road, Route 90 (Israel), runs along the Israeli and Palestinian (West Bank) shores of the Dead Sea at 393 m below sea level.
[edit] Potash and salt works
View of salt evaporation pans on the Dead Sea, taken in 1989 from the Space Shuttle Columbia. The southern half is now separated from the northern half at what used to be the Lisan Peninsula because of the fall of the level of Dead Sea.In the early part of the 20th century, the Dead Sea began to attract interest from chemists who deduced that the Sea was a natural deposit of potash and bromine. The Palestine Potash Company was chartered in 1929 (after its founder, Moses Novomeysky, a Jewish engineer from Siberia, worked for the charter for over ten years). The first plant was on the north shore of the Dead Sea at Kalia and produced potash, or potassium chloride, by solar evaporation of the brine. Employing Arabs and Jews, it was an island of peace in turbulent times. The company quickly grew into the largest industrial site in the Middle East[citation needed] and in 1934 built a second plant on the southwest shore, in the Sodom area, south of the 'Lashon' region of the Dead Sea. The Dead Sea Works Ltd. was established in 1952 as a state-owned company to extract potash and other minerals from the Dead Sea.
From the Dead Sea brine, Israel produces (2001) 1.77 million tons potash, 206,000 tons elemental bromine, 44,900 tons caustic soda, 25,000 tons magnesium metal, and sodium chloride. On the Jordanian side of the Dead Sea, Arab Potash (APC), formed in 1956, produces 2.0 million tons of potash annually, as well as sodium chloride and bromine. Both companies use extensive salt evaporation pans that have essentially diked the entire southern end of the Dead Sea for the purpose of producing carnallite, potassium magnesium chloride, which is then processed further to produce potassium chloride. The power plant on the Israeli side allows production of magnesium metal (by a subsidiary, Dead Sea Magnesium Ltd.). The salt evaporation pans are visible from space.
[edit] Recession of the Dead Sea
Dead Sea at Dusk (from Suwayma, Jordan)
Sinkholes at Mineral BeachIn recent decades, the Dead Sea has been rapidly shrinking because of diversion of incoming water. From an elevation of 395 m below sea level in 1970 [7] it fell 22 m to 418 m below sea level in 2006, reaching a drop rate of 1 m per year. Although the Dead Sea may never entirely disappear, because evaporation slows down as surface area decreases and salinity increases, it is feared that the Dead Sea may substantially change its characteristics.
The Dead Sea level drop has been followed by a groundwater level drop, causing brines that used to occupy underground layers near the shoreline to be flushed out by freshwater. This is believed to be the cause of the recent appearance of large sinkholes along the western shore – incoming freshwater dissolves salt layers, rapidly creating subsurface cavities that subsequently collapse to form these sinkholes.[8]
One of the plans which were suggested as a means to stop the recession of the Dead Sea is to channel water from the Mediterranean or the Red Sea, either through tunnels or canals (the Dead Sea Canal). Although a Mediterranean structure would be shorter, Israel is now committed to building a Red Sea canal in deference to Jordan's needs. The plan is to pump water 120 m up the Arava/Arabah from Aqaba or Eilat, tunnel under the highest point of the Arava/Arabah valley, and then canalize the river of seawater as it falls 520 m to the Dead Sea. The desalination plant would be constructed in Jordan.
On May 9, 2005, Jordan, Israel, and the Palestinian Authority signed an agreement to begin feasibility studies on the project, to be officially known as the "Two Seas Canal". The scheme calls for the production of 870 million cubic metres of fresh water per year and 550 megawatts of electricity. The World Bank is supportive of the project. However, several environmental groups have raised concerns about possible negative impacts of the project on the natural environment of the Dead Sea and Arava.
[edit] Water attractions
Besides the unique water of the Dead Sea itself, there are also health spas and hot springs along the shore. On the Jordanian side there are the Dead Sea Marriott and The Movenpick resorts. Both are equipped with spas and multiple restaurants, etc. 2007 saw a Kempinski Hotel under construction alongside. There is also the Israeli Atractziah Water Park (across from Kalia Kibbutz) and swimming pools in the large Hotel Resort.
[edit] Related global extremes
West Antarctica's Don Juan Pond has a greater salinity than the Dead Sea, at 18 times ocean salinity.
The deepest point on the Earth's crust is the Mariana Trench, a submarine trench in the western Pacific Ocean.
There are ice-covered depressions on the continent of Antarctica that are deeper than the Dead Sea (such as the Bentley Subglacial Trench).
The world's deepest lake is Lake Baikal in Siberia, Russia.
[edit] See also
The Dead Sea regionDead Sea Canal
Two Seas Canal
List of places on land with elevations below sea level
Great Salt Lake
[edit] Further reading
Yehouda Enzel, et al, eds (2006) New Frontiers in Dead Sea Paleoenvironmental Research, Geological Society of America, ISBN 0-8137-2401-5 [2]
Niemi, Tina M., Ben-Avraham, Z., and Gat, J., eds., 1997, The Dead Sea: The Lake and Its Setting: N.Y., Oxford University Press, 286 p.
[edit] Notes
^ Dead Sea Data Summary. International Lake Environment Committee Foundation.
^ Monitoring of the Dead Sea. Israel Marine Data Center (ISRAMAR).
^ Goetz, P.W. (ed.) The New Encyclopaedia Britannica (15th ed.). Vol. 3, p. 937. Chicago, 1986.
^ DAV school magazine vol.IV (March-April 2005)
^ http://www.american.edu/TED/deadsea.htm
^ S. Halevy et al. Dead sea bath salt for the treatment of psoriasis vulgaris: a double-blind controlled study. Journal of the European Academy of Dermatology and Venereology, Volume 9, Issue 3: 237-242.
^ C. Klein, A. Flohn, Contribution to the Knowledge in the Fluctuations of the Dead Sea Level. Theoretical and Applied Climatology, vol. 38, p. 151–156, 1987
^ M. Abelson, Y. Yechieli, O. Crouvi, G. Baer, D. Wachs, A. Bein, V. Shtivelman. "Evolution of the Dead Sea Sinkholes", in New Frontiers in Dead Sea Paleoenvironmental Research, Geological Society of America, special paper 401, p. 241–253, 2006
[edit] External links
Wikimedia Commons has media related to:
Dead SeaThe official Israeli site
Ezekiel's Water Project
Race is on to save the Dead Sea
A Web Documentary On The Dead Sea
Multilateral project for sustainable water management in the lower Jordan Valley
Retrieved from "http://en.wikipedia.org/wiki/Dead_Sea"
Categories: Articles with unsourced statements since April 2007 | All articles with unsourced statements | Articles with unsourced statements since February 2007 | Dry areas below sea level | Endorheic lakes | Extreme points of the world | Geography of Jordan | Geography of Palestine | Great Rift Valley lakes | Guinness World Record | Jewish history | Lakes of Israel | New Testament places | Seas | Shrunken lakes | Tanakh places | West Bank
ViewsArticle Discussion Edit this page History Personal toolsSign in / create account Navigation
Main page
Contents
Featured content
Current events
Random article
interaction
About Wikipedia
Community portal
Recent changes
Upload file
Contact us
Make a donation
Help
Search
Toolbox
What links here
Related changes
Upload file (no wizard)
Special pages
Printable version
Permanent link
Cite this article
In other languages
Беларуская (тарашкевіца)
فارسی
العربية
Aragonés
Asturianu
Bosanski
Български
Català
Česky
Cymraeg
Dansk
Deutsch
Eesti
Ελληνικά
Español
Esperanto
Français
Gaeilge
Galego
한국어
Hrvatski
Bahasa Indonesia
Íslenska
Italiano
עברית
Latviešu
Lëtzebuergesch
Lietuvių
Македонски
Bahasa Melayu
Nederlands
日本語
Norsk (bokmål)
Polski
Português
Română
Русский
Simple English
Slovenčina
Slovenščina
Српски / Srpski
Suomi
Svenska
தமிழ்
ไทย
Tiếng Việt
Українська
中文
ייִדיש
This page was last modified 22:21, 15 May 2007. All text is available under the terms of the GNU Free Documentation License. (See Copyrights for details.)
Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a US-registered 501(c)(3) tax-deductible nonprofit charity.
Privacy policy About Wikipedia Disclaimers
Subscribe to:
Posts (Atom)
