|Table of Contents|

Low-frequency Characteristics of Silk-road and East Asia-Pacific Patterns and Their Effects on Summer Precipitation in Jianghuai River Basin, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2023年第06期
Page:
1341-1354
Research Field:
环境与可持续发展
Publishing date:

Info

Title:
Low-frequency Characteristics of Silk-road and East Asia-Pacific Patterns and Their Effects on Summer Precipitation in Jianghuai River Basin, China
Author(s):
GUO Zi-wei1234 WANG Li-juan123* LIU Dan-ling123
(1. Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China; 2. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China; 3. Joint International Research Laboratory of Climate and Environment Change, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China; 4. Henan Meteorological Observatory, Zhengzhou 450003, Henan, China)
Keywords:
atmospheric teleconnection summer precipitation low-frequency filtering SR pattern EAP pattern western Pacific subtropical high Jianghuai River Basin
PACS:
P466
DOI:
10.19814/j.jese.2023.05040
Abstract:
The summer flood disaster in Jianghuai River Basin(JRB)is mainly due to the stable maintenance of abnormal atmospheric circulation. The influence mechanism of low-frequency oscillations and their synergistic changes on summer precipitation in JRB is one of the hot issues in the field of atmospheric science. Based on the daily reanalysis data of ERA5 and daily station precipitation data provided by China Meteorological Administration, the low-frequency characteristics of silk-road(SR)and East Asia-Pacific(EAP)patterns, and their influence mechanism on summer precipitation in JRB were analyzed. The results show that the low-frequency periods of 10-30 d of SR and EAP patterns are closely related to the summer precipitation in JRB. The low-frequency systems of SR and EAP patterns have undergone positive and negative phase conversion and gradually reach the peak(valley)phase. The main results are as follows: ① The 10-30 d low-frequency meridional winds at the isobaric surface of 200 hPa present alternating distribution of northerly and southerly winds along the westerly jet; when SR pattern reaches the peak of negative phase, JRB is controlled by the northerly wind, and the low-frequency cyclone in the middle latitude is strengthened, accelerating the westerly jet. ② Western Pacific subtropical high(WPSH)and South Asian high(SAH)have a low-frequency scale of 10-30 d; the two low-frequency highs move towards each other and overlap in JRB at the peak phase, which is in favor of persistent precipitation. ③ The anomalous outgoing longwave radiation(OLR)wave train moving northwest from East Asia also shows a significant low-frequency oscillation characteristic of 10-30 d; when it is in the peak phase, OLR is a negative anomaly in JRB, which is conducive to the precipitation. ④ The configuration of positive vorticity at lower level and negative vorticity at upper level with a low-frequency scale of 10-30 d is in favor of convergence at lower level and divergence at upper level, which leads to the enhancement of upward motion and triggers precipitation in JRB.

References:

[1] 黄建平,陈 文,温之平,等.新中国成立70年以来的中国大气科学研究:气候与气候变化篇[J].中国科学:地球科学,2019,49(10):1607-1640.
HUANG Jian-ping,CHEN Wen,WEN Zhi-ping,et al.Review of Chinese Atmospheric Science Research over the Past 70 Years:Climate and Climate Change[J].Science China:Earth Sciences,2019,49(10):1607-1640.
[2] ALIZADEH O,QADIMI M,ZOLGHADRSHOJAEE M,et al.Frequency of Different Types of El Niño Events Under Global Warming[J].International Journal of Climatology,2022,42(16):9697-9709.
[3] 刘 恬,高晓清,谭桂容,等.中国江淮地区夏季强降水事件的统计分析[J].高原气象,2019,38(1):136-142.
LIU Tian,GAO Xiao-qing,TAN Gui-rong,et al.Statistical Analysis of Summer Heavy Rainfall Events over Jianghuai Region of China[J].Plateau Meteoro-logy,2019,38(1):136-142.
[4] 傅云飞,罗 晶,王东勇,等.夏季江淮地区降水的气候变化研究进展[J].暴雨灾害,2020,39(4):317-324.
FU Yun-fei,LUO Jing,WANG Dong-yong,et al.A Review of Studies on Climate Change of Summer Precipitation in the Jianghuai Region[J].Torrential Rain and Disasters,2020,39(4):317-324.
[5] 高守亭,周玉淑,冉令坤.我国暴雨形成机理及预报方法研究进展[J].大气科学,2018,42(4):833-846.
GAO Shou-ting,ZHOU Yu-shu,RAN Ling-kun.A Review on the Formation Mechanisms and Forecast Methods for Torrential Rain in China[J].Chinese Journal of Atmospheric Sciences,2018,42(4):833-846.
[6] 叶笃正,黄荣辉.我国长江黄河两流域旱涝规律成因与预测研究的进展、成果与问题[J].地球科学进展,1991,6(4):24-29.
YE Du-zheng,HUANG Rong-hui.Advances,Results and Problems of the Project “Investigation on Laws,River Valley and the Yangtze River Valley of China”[J].Advances in Earth Science,1991,6(4):24-29.
[7] 陶诗言,丁一汇,周晓平.暴雨和强对流天气的研究[J].大气科学,1979,3(3):227-238.
TAO Shi-yan,DING Yi-hui,ZHOU Xiao-ping.Study on Heavy Rain and Convective Weather[J].Scientia Atmospherica Sinica,1979,3(3):227-238.
[8] 韩世茹,周须文,车少静,等.江淮流域夏季低频降水的前期预报信号[J].大气科学学报,2021,44(2):199-208.
HAN Shi-ru,ZHOU Xu-wen,CHE Shao-jing,et al.Forecast Signal of Summer Low-frequency Precipita-tion in the Yangtze-Huaihe River Basin[J].Transactions of Atmospheric Sciences,2021,44(2):199-208.
[9] 丁一汇,柳艳菊,宋亚芳.东亚夏季风水汽输送带及其对中国大暴雨与洪涝灾害的影响[J].水科学进展,2020,31(5):629-643.
DING Yi-hui,LIU Yan-ju,SONG Ya-fang.East Asian Summer Monsoon Moisture Transport Belt and Its Impact on Heavy Rainfalls and Floods in China[J].Advances in Water Science,2020,31(5):629-643.
[10] CHEN G S,HUANG R H,ZHOU L T.Baroclinic Instability of the Silk Road Pattern Induced by Thermal Damping[J].Journal of the Atmospheric Sciences,2013,70(9):2875-2893.
[11] 谭本馗,陈 文.中高纬度大气遥相关动力学及其对东亚冬季气候影响的研究进展[J].气象学报,2014,72(5):908-925.
TAN Ben-kui,CHEN Wen.Progress in the Study of the Dynamics of Extratropical Atmospheric Teleconnection Patterns and Their Impacts on East Asian Climate[J].Acta Meteorologica Sinica,2014,72(5):908-925.
[12] 张 萍,段安民.热带海表面温度及中纬度大气环流对青藏高原9月降水异常的共同影响[J].中国科学:地球科学,2023,53(3):598-612.
ZHANG Ping,DUAN An-min.Precipitation Anomaly over the Tibetan Plateau Affected by Tropical Sea-surface Temperatures and Mid-latitude Atmospheric Circulation in September[J].Science China:Earth Sciences,2023,53(3):598-612.
[13] 郭 恒,张庆云.华南前汛期盛期中国东部降水异常模态的环流特征及成因分析[J].气候与环境研究,2016,21(6):633-652.
GUO Heng,ZHANG Qing-yun.The Dominant Mo-des of Precipitation Anomalies in Eastern China During the Peak of Pre-rainy Season in South China and Possible Causes[J].Climatic and Environmental Research,2016,21(6):633-652.
[14] LU R Y,OH J H,KIM B J.A Teleconnection Pattern in Upper-level Meridional Wind over the North African and Eurasian Continent in Summer[J].Tellus A:Dynamic Meteorology and Oceanography,2002,54(1):44-55.
[15] 陶诗言,卫 捷.再论夏季西太平洋副热带高压的西伸北跳[J].应用气象学报,2006,17(5):513-525.
TAO Shi-yan,WEI Jie.The Westward,Northward Advance of the Subtropical High over the West Paci-fic in Summer[J].Journal of Applied Meteorological Science,2006,17(5):513-525.
[16] HUANG S N,HUANG F.Spatial-temporal Variations of Dominant Drought/Flood Modes and the Associated Atmospheric Circulation and Ocean Events in Rainy Season over the East of China[J].Journal of Ocean University of China,2012,11(2):137-146.
[17] SUN X Q,LI S L,HONG X W,et al.Simulated Influence of the Atlantic Multidecadal Oscillation on Summer Eurasian Nonuniform Warming Since the Mid-1990s[J].Advances in Atmospheric Sciences,2019,36(8):811-822.
[18] DONG X,HE C.Zonal Displacement of the Western North Pacific Subtropical High from Early to Late Summer[J].International Journal of Climatology,2020,40(11):5029-5041.
[19] 施 宁,布和朝鲁,纪立人,等.中高纬Rossby波活动对盛夏东亚—太平洋事件中期演变过程的影响[J].大气科学,2009,33(5):1087-1100.
SHI Ning,BUEH Cho-law,JI Li-ren,et al.Impacts of Mid- and High-latitude Rossby Wave Activities on the Medium-range Evolution of East Asia/Pacific Events During the Mid- and Late Summer[J].Chinese Journal of Atmospheric Sciences,2009,33(5):1087-1100.
[20] 陆日宇,黄荣辉.东亚—太平洋遥相关型波列对夏季东北亚阻塞高压年际变化的影响[J].大气科学,1998,22(5):727-734.
LU Ri-yu,HUANG Rong-hui.Influence of East Asia/Pacific Teleconnection Pattern on the Interannual Variations of the Blocking Highs over the Northeastern Asia in Summer[J].Chinese Journal of Atmospheric Sciences,1998,22(5):727-734.
[21] 李崇银,凌 健,宋 洁,等.中国热带大气季节内振荡研究进展[J].气象学报,2014,72(5):817-834.
LI Chong-yin,LING Jian,SONG Jie,et al.Research Progress in China on the Tropical Atmospheric Intraseasonal Oscillation[J].Acta Meteorologica Sinica,2014,72(5):817-834.
[22] CHEN Y,ZHAI P M.Synoptic-scale Precursors of the East Asia/Pacific Teleconnection Pattern Responsible for Persistent Extreme Precipitation in the Yangtze River Valley[J].Quarterly Journal of the Royal Meteorological Society,2015,141:1389-1403.
[23] 毛江玉,吴国雄.1991年江淮梅雨与副热带高压的低频振荡[J].气象学报,2005,63(5):762-770.
MAO Jiang-yu,WU Guo-xiong.Intraseasonal Variability in the Yangtze-Huaihe River Rainfall and Subtropical High During the 1991 Meiyu Period[J].Acta Meteorologica Sinica,2005,63(5):762-770.
[24] HUANG R H,CHEN J L,HUANG G.Characteristics and Variations of the East Asian Monsoon System and Its Impacts on Climate Disasters in China[J].Advances in Atmospheric Sciences,2007,24(6):993-1023.
[25] WANG L J,WANG C,GUO D.Evolution Mechanism of Synoptic-scale EAP Teleconnection Pattern and Its Relationship to Summer Precipitation in China[J].Atmospheric Research,2018,214:150-162.
[26] WANG C,WANG L J.Combined Effects of Synoptic-scale Teleconnection Patterns on Summer Precipita-tion in Southern China[J].Atmosphere,2018,9(4):154-173.
[27] 郭紫薇,王黎娟.SR型与EAP型遥相关“结合模态”对2020年江淮入梅初期强降水的影响[J].大气科学,2023,47(4):1171-1182.
GUO Zi-wei,WANG Li-juan.Impact of the “Combined Modality” of Silk-road and East Asia-Pacific Teleconnection Patterns on the Heavy Precipitation in the Early Stage of Meiyu in the Yangtze-Huaihe River Region in 2020[J].Chinese Journal of Atmospheric Sciences,2023,47(4):1171-1182.
[28] 梁 萍,丁一汇,何金海,等.江淮区域梅雨的划分指标研究[J].大气科学,2010,34(2):418-428.
LIANG Ping,DING Yi-hui,HE Jin-hai,et al.A Study of Determination Index of Regional Meiyu over the Yangtze-Huaihe Basin[J].Chinese Journal of Atmospheric Sciences,2010,34(2):418-428.

Memo

Memo:
-
Last Update: 2023-12-01