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Labrador Sea Water : ウィキペディア英語版
Labrador Sea Water

Labrador Sea Water (LSW) is an intermediate water mass characterized by cold water, relatively low salinity compared to other intermediate water masses,〔Talley, Lynne D., et al. Descriptive Physical Oceanography. Academic Press, 2011, p. 497〕 and high concentrations of both oxygen and anthropogenic tracers.〔Pickart, Robert S., et al. "Is Labrador Sea Water formed in the Irminger basin?" Deep Sea Research I: Oceanographic Research Papers 50.1 (2003): 23-52〕 It is formed by convective processes in the Labrador Sea〔Yashayaev, I.M., et al. "Recent Decline of the Labrador Sea Water." Bedford Institute of Oceanography, 2000〕 located between Greenland and the northeast coast of the Labrador Peninsula. Deep convection in the Labrador Sea allows colder water to sink forming this water mass, which is a contributor to the upper layer of North Atlantic Deep Water. North Atlantic Deep Water flowing southward is integral to the Atlantic Meridional Overturning Circulation.〔Shcmittner, Andreas, et al. "Introduction: The Ocean's Meridional Overturning Circulation" 2013 http://people.oregonstate.edu/~schmita2/pdf/S/schmittner07agu_intro.pdf〕 The Labrador Sea experiences a net heat loss to the atmosphere annually.
== Formation ==
Convection in the Labrador Sea is the result of a combination of cyclonic oceanographic circulation of the sea currents and cyclonic atmospheric forcing. At the southern tip of Greenland, water enters the West Greenland Current from the East Greenland Current, continues to flow northwest around the Baffin Bay, and then southeast into the Baffin Island Current continuing in the same direction in the Labrador Current. Sea ice in the winter months inhibits surface flow into Baffin Bay. The Labrador Current and the WGC flow in opposite directions resulting in a cyclonic eddy. During winter months low pressure dominates in this region,〔Wallace, John M. and Peter V. Hobbs. Atmospheric Science An Introductory Survey. Academic Press, 2006, p. 17〕 and in years with a positive North Atlantic Oscillation deeper convection is observed.〔IPCC North Atlantic Subpolar Gyre, Laabrador Sea and Nordic Seas 2007 http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch5s5-3-2-1.html〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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