globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2017MS001084
Scopus记录号: 2-s2.0-85039547819
论文题名:
Nonlocality of Tropical Cyclone Activity in Idealized Climate Simulations
作者: Frisius T; , Abdullah S; M; A
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期:8
起始页码: 3099
结束页码: 3115
语种: 英语
英文关键词: Atmospheric humidity ; Climate change ; Climate models ; Oceanography ; Storms ; Surface waters ; Tropics ; Vorticity ; Atmospheric climate ; Genesis potential index ; Scientific researches ; Sea surface temperature (SST) ; Seasonal genesis parameter ; Tropical cyclone ; Tropical cyclone activity ; Tropospheric temperature ; Hurricanes ; climate modeling ; cyclogenesis ; experiment ; index method ; land-sea interaction ; ocean basin ; relative humidity ; sea surface temperature ; sensitivity analysis ; spectral resolution ; temperature anomaly ; tropical cyclone ; troposphere ; vorticity
英文摘要: The response of tropical cyclone activity in the predicted warmer future climate is still a topic of scientific research. However, by the nonlocality hypothesis, tropical cyclone activity depends rather on relative than absolute sea surface temperature (SST). This hypothesis is investigated through idealized experiments performed with the global atmospheric climate model PlaSim. The model includes a prescribed SST and adopts a spectral resolution of T170 for resolving tropical cyclones. An idealized land-sea configuration with two oceans and two continents has been used to study the nonlocality mechanism. The sensitivity experiments WARMBASIN and COLDBASIN include a positive and negative SST anomaly of 2.5 K in the northeastern basin. The tropical cyclone activity in the control run is similar in all four ocean basins while experiment WARMBASIN simulates a striking local increase of tropical cyclones. However, they nearly vanish in the other three ocean basins. The response is weaker and in the opposite way in COLDBASIN with a local reduction and a nonlocal increase. Analysis of well-known cyclogenesis indices shows that nonlocality could be explained by the vorticity, relative humidity, and upper tropospheric temperature changes in experiment WARMBASIN while only vorticity is in agreement with nonlocality in experiment COLDBASIN. The vorticity anomalies determine the presence or absence of a steady state large-scale low at the location where tropical cyclones favorably form. This low is modified by an SST-induced change of a Walker-like planetary circulation. © 2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75696
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Meteorological Institute, Universität Hamburg, Hamburg, Germany

Recommended Citation:
Frisius T,, Abdullah S,M,et al. Nonlocality of Tropical Cyclone Activity in Idealized Climate Simulations[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(8)
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