Multi-Scale Variation of the Summer Rainfall over Sichuan-Chongqing Basin in Recent 50 Years

  • WANG Chunxue ,
  • MA Zhenfeng ,
  • QIN Ningsheng ,
  • ZHANG Shunqian ,
  • DENG Biao
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  • Climate Center of Sichuan Province, Chengdu 610072, China;Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China

Received date: 2015-03-17

  Online published: 2016-10-28

Abstract

In the past research, there are many studies on the characteristics of the summer precipitation in Sichuan-Chongqing basin, but most of them are separately discussed in terms of its annual or inter annual variation characteristics and its possible mechanism. The analysis of the characteristics of the seasonal variation is relatively less. Therefore, in this paper the characteristics of the seasonal interannual and decadal variation will be studied systematically and deeply from different time scales. The daily precipitation data from 1961 to 2010 of 24 meteorological stations are used in this paper. Use the same period monthly mean 500 hPa, 100 hPa height field and 1000~300 hPa zonal wind and humidity field reanalysis data. Two methods are used in this article. MTM-SVD method is a multivariable frequency domain decomposition technique proposed by Park and Mann. The empirical orthogonal function expansion technique was introduced into the study of atmospheric science by Lorenz in the middle of 1950 s. The results show that the main mode of summer precipitation in Sichuan-Chongqing Basin is the East-west reverse distribution pattern. MTM-SVD analysis points out that the seasonal changes of summer rainfall at Sichuan-Chongqing Basin mainly reflected the oscillation of Quasi-33 day. The seasonal typical cycle performed the evolution between the distribution of east-west reverse and the north-south. Its interannual variation mainly showed Quasi-2 years cycle, which spatial distribution is consistent with that primary mode. In the aspects of decadal variations, the summer precipitation has decreasing trend in the western basin but growing trend in the eastern basin. The results of sliding t test indicated that the summer rainfall appeared two distinct mutations in 1979 and 1987. Synthetic analysis shows that corresponding to the abnormally northeastward South Asia high (SAH), the West Pacific subtropical high (WPSH) inclines to more northward, while the warm-humid air from the Bay of Bengal is blocked in the west basin which leading to more precipitation in west basin than the east basin. The southwestward SAH and the southward WPSH always accompanies more rainfall in the east basin than the west. In this paper, the fact of the multi scale variation of the precipitation in the basin is analyzed, and the general circulation background of the typical year is given too. The impact factors for different time scale characteristics are not the same. The characteristics of precipitation intraseasonal oscillation signal may affected by the plateau vortex and MJO. Interannual time scale signal is mainly affected by the Indian Ocean dipole, the thermal status of Tibetan Plateau external forcing, decadal scale change should be considering the factor of solar activities, etc., which are worth further study.

Cite this article

WANG Chunxue , MA Zhenfeng , QIN Ningsheng , ZHANG Shunqian , DENG Biao . Multi-Scale Variation of the Summer Rainfall over Sichuan-Chongqing Basin in Recent 50 Years[J]. Plateau Meteorology, 2016 , 35(5) : 1191 -1199 . DOI: 10.7522/j.issn.1000-0534.2015.00094

References

[1]Han X, Wei F, Tourre Y M, et al.2008.Spatio-temporal variability of Northern Hemispheric Sea Level Pressure (SLP) and precipitation over the mid-to-low reaches of the Yangtze River[J].Adv Atmos Sci, 25(3):458-466.
[2]Lorenz E N.1956.Empirical orthogonal function and statistical weather prediction[R].Science Report 1, statistical forecast project report, Department of meteorology, MIT, 49pp.
[3]Mann M E, Park J.1994.Global-scale modes of surface temperature variability on interannual to century timescales[J].J Geophys Res, 99(D12):25819-25833.
[4]Mann M E, Park J.1996.Joint spatiotemporal modes of surface temperature and sea level pressure variability in the Northern Hemisphere during the last century[J].J Climate, 9(9):2137-2162.
[5]Mann M E, Park J.1999.Oscillatory spatiotemporal signal detection in climate studies:A multiple-taper spectral domain approach[J].Adv Geophys, 41:1-131.
[6]Small D, Islam S.2008.Low frequency variability in fall precipitation across the United States[J].Water Resour Res, 44(4):W4426.DOI:10.1029/2006WR005623.2008.
[7]Bao Ming, Huang Ronghui.2006.Characteristics of the interdecadal variations of heavy rain over China in the last 40 years[J].Chinese J Atmos Sci, 30(6):1057-1067.<br/>鲍名, 黄荣辉.2006.近60年我国暴雨的年代际变化特征[J].大气科学, 30(6):1057-1067.
[8]Central Meteorological Observatory of Chengdu.1973.Discussion on Asia in summer 100 MB of South Asia high activity and its relationship with the drought and flood in Sichuan[J].Meteor Sci Technol, (Supp2):1-8.<br/>成都中心气象台.1973.夏季亚洲100毫巴南亚高压的活动规律及其与四川旱涝关系的探讨[J].气象科技资料, (增刊2):1-8.
[9]Cen Sixian, Gong Yuanfa, Lai Xin.2014.Impact of heat source over Qinghai-Xizang Plateau and its surrounding areas on rainfall in Sichuan-Chongqing Basin in summer[J].Plateau Meteor, 33(5):1182-1189.DOI:10.7522/j.issn.1000-0534.2013.00122.<br/>岑思弦, 巩远发, 赖欣.2014.青藏高原及其周围地区大气热源对川渝盆地夏季降水的影响[J].高原气象, 33(5):1182-1189.
[10]Chen Zhongming, Min Wenbin, Liu Fuming.2003.Relationship between surface heating fields over Qinghai-Xizang Plateau and precipitation in Sichuan Basin during summer[J].Meteor Mon, 29(5):9-12.<br/>陈忠明, 闵文彬, 刘富明.2003.青藏高原地表热源异常与四川盆地夏季降水的关联[J].气象, 29(5):9-12.
[11]Hu Deqiang, Lu Riyu, Su Qin, et al.2014.Interannual variation in the mid-summer rainfall over the western Sichuan Basin and the associated circulation anomalies[J].Chinese J Atmos Sci, 38(1):13-20.<br/>胡德强, 陆日宇, 苏秦, 等.2014.盛夏四川盆地西部地区降水年际变化及其对应的环流异常[J].大气科学, 38(1):13-20.
[12]Jiang Xingwen, Li Yueqing, Li Chun, et al.2007.Characteristics of summer water vapor transportation in Sichuan Basin and its relationship with regional drought and flood[J].Plateau Meteor, 26(3):476-484.<br/>蒋兴文, 李跃清, 李春, 等.2007.四川盆地夏季水汽输送特征及其对旱涝的影响[J].高原气象, 26(3):476-484.
[13]Liu Fuming, Wei Shuhua.1979.Characteristics of the plateau monsoon circulation during the early summer drought and rainy years[J].Meteor Mon, 5(5):12-13.<br/>刘富明, 魏淑华.1979.初夏干旱及多雨年代的高原季风环流特征[J].气象, 5(5):12-13.
[14]Liu Fuming, Fu Meijuan.1986.A study on the moving eastward lows over Qinghai-Xizang Plateau[J].Plateau Meteor, 5(2):125-134.<br/>刘富明, 濮梅娟.1986.东移的青藏高原低涡的研究[J].高原气象, 5(2):125-134.
[15]Liu Fuming, Li Yueqing.1994.Characteristics of diabatic heat flow field with mid-summer drought in East Sichuan[J].Chinese J Atmos Sci, 18(4):423-430.<br/>刘富明, 李跃清.1994.川东盛夏伏旱非绝热热流量场特征[J].大气科学, 18(4):423-430.
[16]Li Guoping.2007.Dynamic meteorology of the Tibetan Plateau[M].Second Edition.Beijing:China Meteorological Press, 20.<br/>李国平.2007.青藏高原动力气象学[M].第二版.北京:气象出版社, 20.
[17]Li Yueqing, Zhang Jijia.1993.The relations between the atmospheric oscillation and the subtropical high activities and the Sichuan Basin's flood-drought[J].Journal of Chengdu institute meteorology, 27(4):16-20.<br/>李跃清, 章基嘉.1993.大气振荡与副高活动及四川盆地旱涝的关系[J].成都气象学院学报, 27(4):16-20.
[18]Li Yueqing.2000.Analysis of circulation variations over the Tibetan Plateau and drought-flood anomalies on its eastern side[J].Chinese J Atmos Sci, 24(4):470-476.<br/>李跃清.2000.青藏高原上空环流变化与其东侧旱涝异常分析[J].大气科学, 24(4):470-476.
[19]Li Yueqing.2003.Surface heating in the Tibetan Plateau and general circulation over it and their relations with the prediction of drought-flood at its eastern side[J].Chinese J Atmos Sci, 27(1):107-114.<br/>李跃清.2003.青藏高原地面加热及上空环流场与东侧旱涝预测的关系[J].大气科学, 27(1):107-114.
[20]Qi Dongmei, Li Yueqing, Chen Yongren, et al.2011.Spatial-temporal variations of drought and flood intensitiesin Sichuan region in the last 50 years[J].Plateau Meteor, 30(5):1170-1179.<br/>齐冬梅, 李跃清, 陈永仁, 等.2011.近50年四川地区旱涝时空变化特征研究[J].高原气象, 30(5):1170-1179.
[21]Ren Rongcai, Liu Qimin, Wu Guoxiong.2007.Impact of South Asia high on the short-term variation of the subtropical anticyclone over Western Pacific in July 1998[J].Acta Meteor Sinica, 65(2):183-197.<br/>任荣彩, 刘屹岷, 吴国雄.2007.1988年7月南亚高压影响西太平洋副热带高压短期变异的过程和机制[J].气象学报, 65(2):183-197.
[22]Tao Shiyan, Zhu Fukang.1964.The 100-mb flow patterns in Southern Asia in summer and its relation to the advance and retreat of the West-Pacific Subtropical Anticyclone over the Far East[J].Acta Meteor Sinica, 34(4):385-396.<br/>陶诗言, 朱福康.1964.夏季亚洲南部100毫巴流型的变化及其与西太平洋副热带高压进退的关系[J].气象学报, 34(4):385-396.
[23]Tan Youbang, Fang Zhifang.1989.The relation between the oscillation of annual precipitation and solar activity in the eastern and western part of Sichuan Basin[J].Journal of Chengdu Institute of Meteorology, 11(4):25-31.<br/>谭友邦, 方之芳.1989.四川盆地东部、西部年降水量的振荡与太阳活动的联系[J].成都气象学院学报, 11(4):25-31.
[24]Wang Chunxue, Li Dongliang.2012.Analysis of the interannual variation of the summer precipitation over the Yellow River Basin and the effect factors based on MTM-SVD method[J].Chinese J Atmos Sci, 36(4):823-834.<br/>王春学, 李栋梁.2012.基于MTM-SVD方法的黄河流域夏季降水年际变化及其主要影响因子分析[J].大气科学, 36(4):823-834.
[25]Wang Chunxue, Ma Zhenfeng, Deng Biao, et al.2015.Characteristic Analysis of precipitation interseasonal oscillation in Southwest China based on MTM-SVD[J].Plateau Meteor, 34(1):59-69.DOI:10.7522/j.issn.1000-0534.2013.00156.<br/>王春学, 马振峰, 邓彪, 等.2015.基于MTM-SVD方法的西南地区降水季节内振荡特征分析[J].高原气象, 34(1):59-69.
[26]Wang Xin, Ma Zhenfeng.2010.Interdecadal variations of summer precipitation and a short-term climate prediction model in flood period of Sichuan and Chongqing[J].Plateau Meteor, 29(3):295-604.<br/>王鑫, 马振峰.2010.川渝地区主汛期降水的年代际变化与短期气候预测模型的建立[J].高原气象, 29(3):295-604.
[27]Wei Fengying.2007.Modern climate statistical technology of diagnosis and prediction meteorology press[M].Second Edition.Beijing:China Meteorological Press.<br/>魏凤英.2007.现代气候统计诊断与预测技术[M].第2版.气象出版社.
[28]Yang Xiaobo, Yang Shuqun, Ma Zhenfeng.2014.Influence of the position of East Asian Subtropical Westerly Jet in summer on precipitation over Sichuan-Chongqing region[J].Plateau Meteor, 33(2):384-393.DOI:10.7522/j.issn.1000-0534.2013.00034.<br/>杨小波, 杨淑群, 马振峰.2014.夏季东亚副热带西风急流位置对川渝地区降水的影响[J].高原气象, 33(2):384-393.
[29]Ye Yuezhen, Fang Zhifang.1999.The relationship between thermal regime in Qinghai-Xizang Plateau and precipitation in Sichuan Basin during flood season[J].Plateau Meteor, 18(2):162-170.<br/>叶月珍, 方之芳.1999.青藏高原热力状况与四川盆地汛期降水的联系[J].高原气象, 18(2):162-170.
[30]Zhao Xuan, Li Yaohui, Qi Dongmei.2013.Spatial-temporal variation characteristics of summer precipitation in Sichuan, 1961-2007[J].J Glaciology Geocryology, 35(4):959-967.<br/>赵旋, 李耀辉, 齐冬梅.2013.1961-2007年四川夏季降水的时空变化特征[J].冰川冻土, 35(4):959-967.
[31]Zhao Shanshan, Zhou Tianjun, Yang Xiuqun, et al.2009.Interdecadal change of the relationship between the tropical Indian Ocean dipole mode and the summer climate anomaly in China[J].Acta Meteor Sinica, 67(4):549-560.<br/>赵珊珊, 周天军, 杨修群, 等.2009.热带印度洋偶极子与中国夏季年际气候异常关系的年代际变化[J].气象学报, 67(4):549-560.
[32]Zhou Changyan, Li Yueqing, Bu Qinglei, et al.2011.Features of drought-flood coexistence in west and east of Sichuan-Chongqing Basin in midsummer and its relating background of atmospheric circulation[J].Plateau Meteor, 30(3):620-627.<br/>周长艳, 李跃清, 卜庆雷, 等.2011.盛夏川渝盆地东西部旱涝并存的特征及其大气环流背景[J].高原气象, 30(3):620-627.
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