气候变化领域集成服务门户(CCPortal): CAPE Threshold for Lightning Over the Tropical Ocean

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DOI	10.1029/2021JD035621
	CAPE Threshold for Lightning Over the Tropical Ocean
	Cheng W.-Y.; Kim D.; Holzworth R.H.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:20
英文摘要	We investigate the relationship between convective available potential energy (CAPE), precipitation, the number and size of storms and overshooting tops, and lightning stroke density (f) over the Central America region. While f increases almost linearly with CAPE1/2 over land, f is nearly muted over the ocean when CAPE is small. In the high-CAPE regime, on the contrary, oceanic storms produce as many lightning flashes as land storms. We show that individual oceanic storms are smaller and contain fewer overshooting tops compared to land storms, although the difference exists across low- and high-CAPE regimes. While f increases as individual storm size increases, the storm size required to produce lightning appears to be disproportionately high in the low-CAPE regime, likely due to the stronger entrainment effect. The entrainment effect on f in the low-CAPE regime appears to be much weaker over land. Applying the CAPE threshold for lightning over the ocean to the CAPE-based lightning parameterization scheme of Romps et al. (2014), https://doi.org/10.1126/science.1259100 improves its performance, in particular, at representing the land-sea contrast in f. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	CAPE; lightning flash density; lightning parameterization; tropical convection; WWLLN
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236941
作者单位	Department of Atmospheric Science, University of Washington, Seattle, WA, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Cheng W.-Y.,Kim D.,Holzworth R.H.. CAPE Threshold for Lightning Over the Tropical Ocean[J],2021,126(20).
APA	Cheng W.-Y.,Kim D.,&Holzworth R.H..(2021).CAPE Threshold for Lightning Over the Tropical Ocean.Journal of Geophysical Research: Atmospheres,126(20).
MLA	Cheng W.-Y.,et al."CAPE Threshold for Lightning Over the Tropical Ocean".Journal of Geophysical Research: Atmospheres 126.20(2021).