气候变化领域集成服务门户(CCPortal): Summer Mean and Extreme Precipitation Over the Mid-Atlantic Region: Climatological Characteristics and Contributions From Different Precipitation Types

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DOI	10.1029/2021JD035045
	Summer Mean and Extreme Precipitation Over the Mid-Atlantic Region: Climatological Characteristics and Contributions From Different Precipitation Types
	Li J.; Qian Y.; Leung L.R.; Feng Z.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:15
英文摘要	Based on a long-term observational data set from the tracking of mesoscale convective systems (MCSs), isolated deep convection (IDC), and tropical cyclones (TCs), we examine the climatological characteristics of summer (June–August) mean and extreme precipitation during 2004–2017 and their respective contributions from MCS, IDC, TC, and non-convective (NC) systems and the local versus remote influence of MCS and IDC over the Mid-Atlantic region (MAR). On average, MCS, IDC, TC, and NC contribute 22%, 29%, 4%, and 45% to the total summer mean precipitation in the region. While MCS and TC precipitation primarily occurs in the coastal areas east of the Appalachian Mountains, IDC precipitation is more concentrated in the southern MAR and near the mountain windward slopes. Each summer, ∼41 MCSs with an average lifetime of 19.6 h influence the MAR, with 80% initiated outside and traveling on average 10 h before their centroids enter the region. Around 13 MCSs initiated in the Great Plains and Midwest propagate across the Appalachian Mountains and contribute 20%–40% to MCS precipitation in the central Mid-Atlantic coastal areas each summer. In contrast, ∼2000 IDC events with an average lifetime of 2.0 h influence the MAR each summer, and 77% are initiated locally. MCS, IDC, TC, and NC contribute 31% (30%), 26% (31%), 17% (7%), and 26% (32%) to the top 1% (5%) extreme daily precipitation, respectively. Considering extreme hourly precipitation, however, the IDC contributions increase to 41% (top 1%) and 38% (top 5%) due to the frequent occurrence and large intensity of IDC precipitation. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	extreme precipitation; isolated deep convection; mesoscale convective system; Mid-Atlantic region; tropical cyclones
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/237086
作者单位	Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Li J.,Qian Y.,Leung L.R.,et al. Summer Mean and Extreme Precipitation Over the Mid-Atlantic Region: Climatological Characteristics and Contributions From Different Precipitation Types[J],2021,126(15).
APA	Li J.,Qian Y.,Leung L.R.,&Feng Z..(2021).Summer Mean and Extreme Precipitation Over the Mid-Atlantic Region: Climatological Characteristics and Contributions From Different Precipitation Types.Journal of Geophysical Research: Atmospheres,126(15).
MLA	Li J.,et al."Summer Mean and Extreme Precipitation Over the Mid-Atlantic Region: Climatological Characteristics and Contributions From Different Precipitation Types".Journal of Geophysical Research: Atmospheres 126.15(2021).