| Warming in Arctic intermediate and deep waters around Chukchi Plateau and its adjacent regions in 1999 |
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| 作者姓名： | ZHAO Jinping GAO Guoping & JIAO Yutian . First Institute of Oceanography State Oceanic Administration Qingdao China . Ocean University of China Qingdao China |
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| 作者单位： | ZHAO Jinping1，GAO Guoping2 & JIAO Yutian1 1. First Institute of Oceanography，State Oceanic Administration，Qingdao 266061，China; 2. Ocean University of China，Qingdao 266003，China |
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| 基金项目： | 国家自然科学基金，中国科学院资助项目，The Key Project of Chinese Academy of Sciences |
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| 摘 要： | Warming in the Arctic Intermediate Water (AIW) has been reported in a series of articles in recent years. Prior to 1992, the water temperature of AIW off the Chukchi Continental Slope had never exceeded 0.5℃. Aagaard et al.1] and Carmack2] were the first to report that the temperature in AIW in the area in 1993 was close to 1℃, based on the data observed in a Canadian expedition. In 1994, the temperature of AIW around the Chukchi Sea and Mendeleyev Ridge again rose by at least an…
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| 收稿时间： | 16 April 2004 |
Warming in Arctic intermediate and deep waters around Chukchi Plateau and its adjacent regions in 1999 |
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| ZHAO Jinping,GAO Guoping & JIAO Yutian . First Institute of Oceanography,State Oceanic Administration,Qingdao ,China, . Ocean University of China,Qingdao ,China.Warming in Arctic intermediate and deep waters around Chukchi Plateau and its adjacent regions in 1999[J].Science in China(Earth Sciences),2005,48(8):1312-1320. |
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| Authors: | ZHAO Jinping GAO Guoping JIAO Yutian |
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| Institution: | 1. First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2. Ocean University of China, Qingdao 266003, China |
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| Abstract: | Based on the data measured during Arctic scientific expedition of China in 1999, the characteristics of temperature and salinity
distributions around the Chukchi Plateau and its adjacent regions have been studied. It was found that the intermediate water
with temperature higher than 0.5? existed in all parts of a 640 km section with a maximum temperature of 0.85? indicating
a strong signal of the warming in Arctic Intermediate Water in 1999. Two important phenomena are described in this paper.
First, the temperature of warm water was horizontally nonuniform. In the area of Chukchi Plateau, the temperature was higher,
the layer of warm water was thicker and the depth of the warm water core was shallower than those in the area of continental
slope. The horizontal nonuniformity of the temperature distribution of warming water implies that the upward heat flux should
also be nonuniform, thus exerting different effects on sea ice thickness, ice extent, and air-sea heat exchange. The mechanism
to generate higher temperature in the plateau region was the bypassing of current around the plateau area caused by the special
local topography, which restricted water exchange across the plateau and conserved heat in the water body. Second, the deep
water down to 1400 m was also warming with a temperature increase of 0.2?. The warming in deep water reflects the occurrence
of complicated heat redistribution processes in the intermediate water, which altered the thermal structure in the upper 1400
m. The warming data embody the obvious impact of global climate change on the Arctic Ocean and further studies are wanted. |
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| Keywords: | Chukchi Plateau Arctic Ocean warming in intermediate water warming in deep water |
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