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Laysan Island : ウィキペディア英語版 | Laysan
Laysan (; Hawaiian: Kauō ), located northwest of Honolulu at N25° 42' 14" W171° 44' 04", is one of the Northwestern Hawaiian Islands. It comprises one land mass of , about 1 by 1.5 miles in size (1.6 by 2.4 km). It is an atoll of sorts, although the land completely surrounds a shallow central lake some above sea level that has a salinity approximately three times greater than the ocean. Laysan's Hawaiian name of Kauō means ''egg'', referring to its shape and how much life springs from the island. ==Geology== Laysan is the second largest single landmass in the Northwestern Hawaiian Islands, after Sand Island at Midway Atoll. Laysan was created by coral growth and geologic upshift.〔Rauzon 2001, p.100.〕 The fringing reefs surrounding the island cover about . Lake Laysan, the , brown, hypersaline lake in the island's interior, has varied in depth over the decades. In the 1860s, the lake was at most deep, but by the 1920s it averaged deep, because of the buildup of sand that had been blown away in sandstorms. The best way to find fresh water on Laysan is to observe where the finches are drinking; the fresh water floats on the saltier water and accumulates around the shore. The tallest point on the island is at above sea level, on a large dune that covers much of the northern portion of the island. A U.S. Geological Survey study found that Laysan, Midway Atoll, and Pacific islands like them could become inundated and unfit to live on during this century.〔"(''Storm Surges, Rising Seas Could Doom Pacific Islands This Century'' ): Atolls and other low-lying islands in the Pacific Ocean may not slip under the waves but they will likely become uninhabitable due to overwashing waves" ClimateWire and Scientific American April 12, 2013〕〔http://pubs.usgs.gov/of/2013/1069/of2013-1069.pdf〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Laysan」の詳細全文を読む
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