Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4123-5 |
Contribution of large-scale midlatitude disturbances to hourly precipitation extremes in the United States | |
Barbero, Renaud1,2; Abatzoglou, John T.3; Fowler, Hayley J.1 | |
2019 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52页码:197-208 |
文章类型 | Article |
语种 | 英语 |
国家 | England; France; USA |
英文摘要 | Midlatitude synoptic weather regimes account for a substantial portion of annual precipitation accumulation as well as multi-day precipitation extremes across parts of the United States (US). However, little attention has been devoted to understanding how synoptic-scale patterns contribute to hourly precipitation extremes. A majority of 1-h annual maximum precipitation (AMP) across the western US were found to be linked to two coherent midlatitude synoptic patterns: disturbances propagating along the jet stream, and cutoff upper-level lows. The influence of these two patterns on 1-h AMP varies geographically. Over 95% of 1-h AMP along the western coastal US were coincident with progressive midlatitude waves embedded within the jet stream, while over 30% of 1-h AMP across the interior western US were coincident with cutoff lows. Between 30-60% of 1-h AMP were coincident with the jet stream across the Ohio River Valley and southeastern US, whereas a a majority of 1-h AMP over the rest of central and eastern US were not found to be associated with either midlatitude synoptic features. Composite analyses for 1-h AMP days coincident to cutoff lows and jet stream show that an anomalous moisture flux and upper-level dynamics are responsible for initiating instability and setting up an environment conducive to 1-h AMP events. While hourly precipitation extremes are generally thought to be purely convective in nature, this study shows that large-scale dynamics and baroclinic disturbances may also contribute to precipitation extremes on sub-daily timescales. |
英文关键词 | Hourly precipitation extremes Synoptic patterns Jet stream Cutoff lows United-States |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460619200011 |
WOS关键词 | CUTOFF LOW SYSTEMS ; ATMOSPHERIC RIVERS ; VERTICAL STRUCTURE ; FLOOD FATALITIES ; CLIMATOLOGY ; EVENTS ; VARIABILITY ; LOWS ; CO2 |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36200 |
专题 | 气候变化 |
作者单位 | 1.Newcastle Univ, Sch Engn, Newcastle Upon Tyne, Tyne & Wear, England; 2.Irstea, Mediterranean Ecosyst & Risks, Aix En Provence, France; 3.Univ Idaho, Dept Geog, Moscow, ID 83843 USA |
推荐引用方式 GB/T 7714 | Barbero, Renaud,Abatzoglou, John T.,Fowler, Hayley J.. Contribution of large-scale midlatitude disturbances to hourly precipitation extremes in the United States[J]. CLIMATE DYNAMICS,2019,52:197-208. |
APA | Barbero, Renaud,Abatzoglou, John T.,&Fowler, Hayley J..(2019).Contribution of large-scale midlatitude disturbances to hourly precipitation extremes in the United States.CLIMATE DYNAMICS,52,197-208. |
MLA | Barbero, Renaud,et al."Contribution of large-scale midlatitude disturbances to hourly precipitation extremes in the United States".CLIMATE DYNAMICS 52(2019):197-208. |
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