کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4466899 1622232 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Antarctic circumpolar current's role in the Antarctic ice system: An overview
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Antarctic circumpolar current's role in the Antarctic ice system: An overview
چکیده انگلیسی

The Antarctic Circumpolar Current (ACC) provides fundamental control on the Antarctic ice system. The tilt of the isopycnals of the ACC, in response to strong westerlies, serves to thermally isolate the Antarctic continent from directly receiving the overwhelming subtropical ocean surface heat. This same tilt provides the northern boundary of the polar seas; as such it “contains” the statically stable cold fresh surface polar waters required for sea ice formation. In this manner it effectively sets the northern limit for seasonal sea ice formation. The isopycnal tilt also allows warm deep water to upwell to the surface near the continental margin in western Antarctica where the ACC skirts the continental shelf, leading to excessive ocean heat flux to the atmosphere in winter, and providing heat to melt the underside of the glacial ice.


► Antarctic Circumpolar Current (ACC) thermally isolates Antarctica.
► Tilt of isopycnal layers in ACC prevents warm subtropical waters form reaching Antarctica.
► ACC isopycnal tilt delimits polar waters to the south restricting sea ice fields.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volumes 335–336, 1 June 2012, Pages 71–74
نویسندگان
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