Spatial Scales of Heavy Meiyu Precipitation Events in Eastern China and Associated Atmospheric Processes.
In: Geophysical Research Letters, Jg. 47 (2020-06-16), Heft 11, S. 1-9
Online
academicJournal
Zugriff:
Analysis of ground‐based and remotely retrieved precipitation data reveals that heavy Meiyu precipitation events (HMPEs) produce a relatively independent rain belt over eastern China. A rotating calipers algorithm is applied to quantify the spatial scales of HMPEs. We find that HMPEs have regular spatial scales with an average length, width, and extent of about 1,400 km, 500 km, and 40.00 × 104 km2, respectively, through a comprehensive assessment of different types of HMPE, illustrating that HMPEs have a size similar to that of the subsynoptic‐scale Meiyu front (1,500–2,000 km). Convective activities along the Meiyu front zone and the upper westerly jet stream strongly affect the position and orientation of rain belts of HMPEs. The Meiyu front zone, strong vertical motions, and large transport of warm moisture have a comparable spatial scale to the HMPE rain belts over eastern China. Plain Language Summary: Many studies have revealed that extreme precipitation events of short or long duration have highly varying spatial scales from several hundred kilometers to several thousand kilometers, increasing the difficult of identifying the most flood‐related precipitation events and corresponding important atmospheric processes. We used a rotating calipers algorithm to quantify the length, width, position, and orientation of rain belts and found that flood‐related heavy Meiyu precipitation events with strong intensity, long duration, and large area have regular climatological spatial scales. Our results will benefit flood‐risk management and decision making for the Yangtze River Basin in China. Key Points: Flood‐related heavy Meiyu precipitation events have robust climatological spatial scales over eastern ChinaAn upper westerly jet stream and lower Meiyu front steer the position and orientation of rain belts of heavy Meiyu precipitation eventsConvective activities along the Meiyu front zone have a comparable spatial scale to the rain belt of heavy Meiyu precipitation events [ABSTRACT FROM AUTHOR]
Titel: |
Spatial Scales of Heavy Meiyu Precipitation Events in Eastern China and Associated Atmospheric Processes.
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Autor/in / Beteiligte Person: | Du, Y. ; Xie, Z. Q. ; Miao, Q. |
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Zeitschrift: | Geophysical Research Letters, Jg. 47 (2020-06-16), Heft 11, S. 1-9 |
Veröffentlichung: | 2020 |
Medientyp: | academicJournal |
ISSN: | 0094-8276 (print) |
DOI: | 10.1029/2020GL087086 |
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