期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 16, 页码 6739-6746出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL064822
关键词
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资金
- Office of Science (BER), U.S. Department of Energy as part of the Regional and Global Climate Modeling Program
- DOE [DE-AC05-76RL01830]
To incorporate the effects of tropical cyclone (TC)-induced upper ocean mixing and sea surface temperature (SST) cooling on TC intensification, a vertical average of temperature down to a fixed depth was proposed as a replacement for SST within the framework of air-sea coupled Potential Intensity (PI). However, the depth to which TC-induced mixing penetrates may vary substantially with ocean stratification and storm state. To account for these effects, here we develop a Dynamic Potential Intensity (DPI) based on considerations of stratified fluid turbulence. For the Argo period 2004-2013 and the three major TC basins of the Northern Hemisphere, we show that the DPI explains 11-32% of the variance in TC intensification, compared to 0-16% using previous methods. The improvement obtained using the DPI is particularly large in the eastern Pacific where the thermocline is shallow and ocean stratification effects are strong.
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