期刊
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
卷 57, 期 13-14, 页码 1141-1151出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.dsr2.2009.12.003
关键词
Deep water warming; Antarctic overturn; Circumpolar deep water; The Pacific Ocean
类别
We studied the change in heat content in the Pacific Ocean using data from repeat hydrographic surveys. The most recent trans-Pacific surveys along 47 degrees N and 179 degrees E conducted in 2007 reveal that circumpolar deep water has warmed along 179 degrees E as suggested by previous studies and also that the deep water was warmer along 47 degrees N even since 1999. Simple estimates show that the heat content increased in the layer deeper than 4000 m over almost the entire Pacific Ocean. The increase in heat content below 3000 m was about 5% of the ocean-wide increase. Heat content changes in the deep layer are not uniform and a vertical profile of heat content change has a minimum at a depth around 3000 m. The non-uniform distribution of heat content change in the mid- to bottom layer demonstrates the existence of overturn circulation and may indicate that this circulation is changing. (C) 2010 Elsevier Ltd. All rights reserved.
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