气候变化领域集成服务门户(CCPortal): Regional MJO Modulation of Northwest Pacific Tropical Cyclones Driven by Multiple Transient Controls

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DOI	10.1029/2020GL087148
	Regional MJO Modulation of Northwest Pacific Tropical Cyclones Driven by Multiple Transient Controls
	Fowler M.D.; Pritchard M.S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	The Madden–Julian Oscillation (MJO) is widely acknowledged for its ability to modulate Northwest Pacific tropical cyclones (TCs), but a complete understanding of the underlying mechanisms remains uncertain. Beyond established effects of the MJO's relative humidity envelope, other dynamical factors have recently been invoked via new genesis potential indices and high-resolution modeling studies. Here we revisit the ability of the MJO to modulate West Pacific TCs through a quasi-explicit cyclone downscaling strategy driven by composited observations, paired later with a genesis index to investigate regional drivers of modulation. We reveal two distinct spatial modes of TC modulation in which the MJO's dynamic and thermodynamic effects act in tandem to increase TCs. In the South China Sea, for instance, shear reductions associated with the MJO's circulation lead to increasing potential intensity ahead of the arrival of a positive humidity anomaly, all of which combine for an extended period of cyclogenesis favorability. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Hurricanes; Modulation; Storms; Tropics; Cyclogenesis; High-resolution models; South China sea; Spatial modes; Thermodynamic effect; Transient controls; Tropical cyclone; West pacific; Climatology; cyclogenesis; downscaling; Madden-Julian oscillation; regional climate; relative humidity; spatial analysis; tropical cyclone; Pacific Ocean; Pacific Ocean (Northwest); South China Sea
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170270
作者单位	Department of Earth System Science, University of California, Irvine, CA, United States; Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Physical Sciences Laboratory, NOAA Earth System Research Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Fowler M.D.,Pritchard M.S.. Regional MJO Modulation of Northwest Pacific Tropical Cyclones Driven by Multiple Transient Controls[J],2020,47(11).
APA	Fowler M.D.,&Pritchard M.S..(2020).Regional MJO Modulation of Northwest Pacific Tropical Cyclones Driven by Multiple Transient Controls.Geophysical Research Letters,47(11).
MLA	Fowler M.D.,et al."Regional MJO Modulation of Northwest Pacific Tropical Cyclones Driven by Multiple Transient Controls".Geophysical Research Letters 47.11(2020).