期刊
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷 121, 期 9, 页码 7176-7191出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016JC011851
关键词
tropical cyclone; typhoon; genesis potential index; statistical property; ocean process
类别
资金
- National Basic Research Program of China [2013CB430302, 2013CB430301]
- National Science Foundation of China [41376034, 41321004]
- National Program on Global Change and AirSea Interaction [GASI-IPOVAI-02, GASI-IPOVAI-01-02, GASI-IPOVAI-04]
- Fundamental Research Funds for the Central Universities [2014B30514]
This study attempts to create a tropical cyclone (TC) genesis potential index (GPI) by considering oceanic parameters and necessary atmospheric parameters. Based on the general understanding of the oceanic impacts on TC genesis, many candidate factors are evaluated and discriminated, resulting in a new GPI index, which is referred to as GPI(ocean). GPI(ocean) includes the parameters of (1) absolute vorticity at 1000 hPa, (2) net sea surface longwave radiation, (3) mean ocean temperature in the upper mixed layer, and (4) depth of the 26 degrees C isotherm. GPI(ocean) is comparable to existing GPIs in representing TC genesis over the western North Pacific on seasonal and interannual variations. The same procedure can be applied to create a similar GPI for the other ocean basins. In the context of climate change, this new index is expected to be useful for evaluating the oceanic influences on TC genesis by using ocean reanalysis products and climate model outputs.
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