Characteristics of atmospheric circulation patterns over East Asia and their impacts on precipitation in summer

Abstract

CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 78:117-133 (2019) - DOI: https://doi.org/10.3354/cr01544 Characteristics of atmospheric circulation patterns over East Asia and their impacts on precipitation in summer Shuping Li1, Guolin Feng2,3,*, Wei Hou3, Jianbo Cheng4 1College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225000, PR China 2College of Physical Science and Technology, Yangzhou University, Yangzhou 225000, PR China 3National Climate Center, China Meteorological Administration, Beijing 100081, PR China 4College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, PR China *Corresponding author: fenggl@cma.gov.cn ABSTRACT: We investigated 3 summer atmospheric circulation patterns over the mid-latitudes of East Asia—the monopole (MOP), East Asia-Pacific (EAP) and southeast-northwest out-of-phase dipole (EWD)—and their impacts on precipitation in eastern China. Our results show that an increase in the frequency of the positive MOP pattern enhances precipitation in northeastern China, while a longer persistence of this pattern induces above-average precipitation in the mid-to-lower reaches of the Yangtze River valley (MLRYR). For the negative MOP pattern, a higher frequency of this pattern leads to below-average precipitation in northeastern and southern China, while its persistence has insignificant influences on precipitation in eastern China. Increases in the frequency and persistence of the positive EAP pattern intensify precipitation in the MLRYR. For the negative EAP pattern, increases in the frequency and persistence of the pattern reduce precipitation in the MLRYR, and a higher frequency of this pattern markedly intensifies precipitation in northern China. Regarding the positive EWD pattern, an increase in its frequency favors below-average precipitation in northern China, and an increase in its persistence clearly intensifies precipitation in the MLRYR. Increases in the frequency and persistence of the negative EWD pattern produce below- (above-)average precipitation in the MLRYR (northeastern China), with a longer persistence of this pattern especially reducing precipitation in the MLRYR. These results indicate that the frequency and persistence of each pattern have different impacts on precipitation in eastern China. KEY WORDS: Eastern China · Atmospheric circulation patterns · Summer precipitation Full text in pdf format PreviousNextCite this article as: Li S, Feng G, Hou W, Cheng J (2019) Characteristics of atmospheric circulation patterns over East Asia and their impacts on precipitation in summer. Clim Res 78:117-133. https://doi.org/10.3354/cr01544 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 78, No. 2. Online publication date: July 11, 2019 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2019 Inter-Research.