气候变化领域集成服务门户(CCPortal): Changes in the summer extreme precipitation in the Jianghuai plum rain area and their relationship with the intensity anomalies of the south Asian high

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DOI	10.1016/j.atmosres.2019.104793
	Changes in the summer extreme precipitation in the Jianghuai plum rain area and their relationship with the intensity anomalies of the south Asian high
	Yin Y.; Han C.; Yang G.; Huang Y.; Liu M.; Wang X.
发表日期	2020
ISSN	0169-8095
卷号	236
英文摘要	Based on the daily precipitation data of 66 stations in the Jianghuai plum rain area from 1960 to 2014 and the concurrent reanalysis data of NCEP/NCAR, this study utilized several techniques, including trend analysis, empirical orthogonal function (EOF) analysis and composite analysis, to investigate the spatio-temporal changes of the summer extreme precipitation in the area and their relationship with the intensity anomalies of the south Asian high (SAH). The main results are as follows: (1) The first eigenvector of the summer extreme precipitation indices (EPIs) of PQ90 and PNL90 exhibits a distribution pattern of uniform “+”, and the first principal component (PC1) shows a significant increasing trend. The second eigenvector generally exhibits a dipole pattern of “south +, north –”, and the second principal component (PC2) of PQ90 shows a significant increasing trend. (2) The intensity index of the summer SAH (SAHI) underwent an abrupt change around 1977, with a subsequent increasing trend. The SAHI depicts a significant positive correlation with PC1 of PNL90 and PQ90, thus the EPIs are higher during the years with a strong SAH. (3) When the SAH shifts eastward (westward) and strengthens (weakens) and the location of the western Pacific subtropical high shifts westward (eastward), the mid-latitude region displays the characteristics of a meridional (zonal) circulation pattern, facilitating (hindering) the occurrence of extreme precipitation in the Jianghuai plum rain area. In addition, corresponding to the above-mentioned circulation patterns, vertical movement strengthens (weakens) over the Jianghuai plum rain area, and thus water vapor fluxes enhance and converge (weaken and diverge). Therefore, extreme precipitation is strengthened (weakened) in the study area. (4) The preceding changes in the atmospheric heat source over the eastern Qinghai-Tibet Plateau (one month in advance) affects the changes of the intensity of the following SAH significantly. The changes in the vertically integrated apparent heat sources 〈Q1〉 over the eastern Qinghai-Tibet Plateau and the sea surface to the east of the Philippines and the apparent moisture sink of the Jianghuai plum rain area is an important factor for the above-mentioned adjustment in the circulation structure and the changes in extreme precipitation. © 2019 Elsevier B.V.
英文关键词	atmospheric heat source; circulation anomaly; extreme precipitation; Jianghuai plum rain area; south Asian high
学科领域	Eigenvalues and eigenfunctions; Orthogonal functions; Surface waters; Atmospheric heat; Circulation anomalies; Extreme precipitation; Jianghuai plum rain area; south Asian high; Rain; climate modeling; eigenvalue; extreme event; heat source; numerical model; precipitation intensity; rainfall; regional climate; summer; Anhui; China; Jianghuai; Prunus domestica
语种	英语
scopus关键词	Eigenvalues and eigenfunctions; Orthogonal functions; Surface waters; Atmospheric heat; Circulation anomalies; Extreme precipitation; Jianghuai plum rain area; south Asian high; Rain; climate modeling; eigenvalue; extreme event; heat source; numerical model; precipitation intensity; rainfall; regional climate; summer; Anhui; China; Jianghuai; Prunus domestica
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120487
作者单位	School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Anhui Institute of Meteorology, Key Laboratory of Atmospheric Science and Satellite Remote Sensing, Hefei, 230031, China; Nanjing Hydraulic Research Institute, State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing, 210029, China; Research Center for Climate Change, Ministry of Water Resources, Nanjing, 210029, China
推荐引用方式 GB/T 7714	Yin Y.,Han C.,Yang G.,et al. Changes in the summer extreme precipitation in the Jianghuai plum rain area and their relationship with the intensity anomalies of the south Asian high[J],2020,236.
APA	Yin Y.,Han C.,Yang G.,Huang Y.,Liu M.,&Wang X..(2020).Changes in the summer extreme precipitation in the Jianghuai plum rain area and their relationship with the intensity anomalies of the south Asian high.Atmospheric Research,236.
MLA	Yin Y.,et al."Changes in the summer extreme precipitation in the Jianghuai plum rain area and their relationship with the intensity anomalies of the south Asian high".Atmospheric Research 236(2020).