Contrast between the climatic states of the warm pool in the Indian Ocean and in the Pacific Ocean |
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Authors: | Email author" target="_blank">Meng?XiangfengEmail author Wu?Dexing |
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Institution: | Laboratory of physical oceanography, Institute of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003, P. R. China |
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Abstract: | Based on the analysis of Levitus data, the climatic states of the warm pool in the Indian Ocean (WPIO) and in the Pacific
Ocean (WPPO) are studied. it is found that WPIO has a relatively smaller area, a shallower bottom and a slightly lower seawater
temperature than those of WPPO. The horizontal area at different depths, volumes, central positions, and bottom depths of
both WPIO and WPPO show quite apparent signals of seasonal variation. The maximum amplitude of WPIO surface area’s seasonal
variation is 58% larger over the annual mean value. WPIO’s maximum volume variation amplitude is 66% larger over the annual
mean value. The maximum variation amplitudes of the surface area and volume of WPPO are 20.9% and 20.6% larger over the annual
mean value respectively. WPIO and WPPO show different temporal and spatial characteristics mainly due to the different wind
fields and restriction of ocean basin geometry. For instance, seasonal northern displacement of WPIO is, to some extent, constrained
by the basin of the Indian Ocean, while WPPO moves relatively freely in the longitudinal direction. The influence of WPIO
and WPPO over the atmospheric motion must be quite different. |
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Keywords: | climatic state warm pool in the Pacific Ocean warm pool in the Indian Ocean seasonal variation |
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