RELATIONSHIP BETWEEN SUMMER LOW-FREQUENCY RAINFALL OVER SOUTHERN CHINA AND PROPAGATION OF TROPICAL INTRASEASONAL OSCILLATION
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摘要
This study investigates the relationship between summer low-frequency rainfall over southern China and tropical intraseasonal oscillation(ISO) in the atmosphere by examining systematically the propagation features of the tropical ISO in terms of focusing on five large-scale low-frequency rainfall regimes in summer over southern China. It is demonstrated that there is a close linkage between the five rainfall regimes over southern China and the northward propagation of the tropical ISO. The moist ISO signals, which influence the low-frequency rainfall events in different regions of southern China, mainly propagate northwestward from the tropical ocean to the southeast of China. The southeast China rainfall regime is intimately associated with the moist ISO signals propagating northwestward from the equatorial mid-western Pacific Ocean. For both the Yangtze River regime and South of Yangtze River regime, the moist ISO signals over the northern South China Sea show an evident northward propagation towards the Yangtze River region, and then propagate westward. It is further found that the interaction between the northward propagation of low-latitude ISO signals and the southward propagation of high-latitude ISO signals can also make a clear influence on the low-frequency rainfall in southern China. For the Southern China regime, the moist ISO signals show a significant northward propagation from the Philippines. Moreover, for the rainless regime, southern China is under dry ISO signals' control, and the latter shows no clear propagation to southern China. This study may provide insights for the extended-range forecasting of summer rainfall in southern China.
This study investigates the relationship between summer low-frequency rainfall over southern China and tropical intraseasonal oscillation(ISO) in the atmosphere by examining systematically the propagation features of the tropical ISO in terms of focusing on five large-scale low-frequency rainfall regimes in summer over southern China. It is demonstrated that there is a close linkage between the five rainfall regimes over southern China and the northward propagation of the tropical ISO. The moist ISO signals, which influence the low-frequency rainfall events in different regions of southern China, mainly propagate northwestward from the tropical ocean to the southeast of China. The southeast China rainfall regime is intimately associated with the moist ISO signals propagating northwestward from the equatorial mid-western Pacific Ocean. For both the Yangtze River regime and South of Yangtze River regime, the moist ISO signals over the northern South China Sea show an evident northward propagation towards the Yangtze River region, and then propagate westward. It is further found that the interaction between the northward propagation of low-latitude ISO signals and the southward propagation of high-latitude ISO signals can also make a clear influence on the low-frequency rainfall in southern China. For the Southern China regime, the moist ISO signals show a significant northward propagation from the Philippines. Moreover, for the rainless regime, southern China is under dry ISO signals' control, and the latter shows no clear propagation to southern China. This study may provide insights for the extended-range forecasting of summer rainfall in southern China.
This study investigates the relationship between summer low-frequency rainfall over southern China and tropical intraseasonal oscillation(ISO) in the atmosphere by examining systematically the propagation features of the tropical ISO in terms of focusing on five large-scale low-frequency rainfall regimes in summer over southern China. It is demonstrated that there is a close linkage between the five rainfall regimes over southern China and the northward propagation of the tropical ISO. The moist ISO signals, which influence the low-frequency rainfall events in different regions of southern China, mainly propagate northwestward from the tropical ocean to the southeast of China. The southeast China rainfall regime is intimately associated with the moist ISO signals propagating northwestward from the equatorial mid-western Pacific Ocean. For both the Yangtze River regime and South of Yangtze River regime, the moist ISO signals over the northern South China Sea show an evident northward propagation towards the Yangtze River region, and then propagate westward. It is further found that the interaction between the northward propagation of low-latitude ISO signals and the southward propagation of high-latitude ISO signals can also make a clear influence on the low-frequency rainfall in southern China. For the Southern China regime, the moist ISO signals show a significant northward propagation from the Philippines. Moreover, for the rainless regime, southern China is under dry ISO signals' control, and the latter shows no clear propagation to southern China. This study may provide insights for the extended-range forecasting of summer rainfall in southern China.
引文
[1]MADDEN R,JULIAN P R.Detection of a 40-50 day oscillation in the zonal wind in the Tropical Pacific[J].JAtmos Sci,1971,28(5):702-708.
[2]LI Chong-yin.Intraseasonal oscillation in the atmosphere[J].Chin J Atmos Sci,1990,14(1):32-45(in Chinese).
[3]LI C Y.Actions of summer monsoon troughs(ridges)and tropical cyclone over South Asia and moving CISK mode[J].Sci Sinica(B),1985,28(11):1197-1206.
[4]LI Chong-yin.New advances of the research on the atmospheric intraseasonal oscillation[J].Progr Nat Sci,2004,14(7):734-741(in Chinese).
[5]HUANG Hai-yan,HE Jin-hai,ZHU Zhi-wei.Advances in research on atmospheric intraseasonal oscillation and its application to extended range forecast[J].Meteor Disast Reduct Res,2011,34(3):1-8(in Chinese).
[6]YANG Qiu-ming.Interannual Variations of Intraseasonal Oscillation Pattern of OLR in Rainy Seasons in East Asia[J].Sci Technol Rev,2010,28(6):83-87.
[7]HSU P C,LI T.Role of the boundary layer moisture asymmetry in causing the eastward propagation of the Madden-Julian Oscillation[J].J Climate,2012,25(14):4914-4931.
[8]HE Jie-lin,WAN Qi-lin,GUAN Zhao-yong,et al.The observation research on intraseasonal oscillation propagating characteristics associated with tropical synoptic waves in Asia-western Pacific region in boreal summer[J].J Trop Meteor,2010,26(6):724-732(in Chinese).
[9]JU Jian-hua,SUN Dan,LV Jun-mei.The Relay Character Analysis of the Zonal and Longitudinal Propagations of the Atmospheric Intraseasonal Oscillation in the East Asian Monsoon Region[J].J Atmos Sci,2008,32(3):523-529(in Chinese).
[10]HE Jin-hai,YANG Song.Meridional propagation of east Asian low-frequency mode and midlatitude low-frequency waves[J].Acta Meteor Sinica,1992,50(2):190-198(in Chinese).
[11]LIN Ai-lan,LIANG Jian-yin,GU De-jun.Review of impacts of tropical atmospheric intraseasonal oscillation on east Asia monsoon and multiple time scales variation of tropical atmospheric intraseasonal oscillation[J].JTrop Meteor,2008,24(1):11-19(in Chinese).
[12]WANG B,RUI H.Synoptic climatology of transient tropical intraseasonal convection anomalies:1975-1985[J].Meteor Atmos Phys,1990,44(1):43-61.
[13]LAWRENCE D M,WEBSTER P J.The boreal summer intraseasonal oscillation:relationship between northward and eastward movement of convection[J].J Atmos Sci,2002,59(9):1593-1606.
[14]YANG Hui,LI Chong-yin.A Study of Propagation of Tropical Intraseasonal Oscillation and Its Influence Mechanism[J].Clim Environ Res,2005,10(2):145-156(in Chinese).
[15]LI Chong-yin,LONG Zhen-xia,MU Ming-quan.Atmospheric Intraseasonal Oscillation and Its Important Effect[J].Chin J Atmos Sci,2003,27(4):518-535(in Chinese).
[16]TENG H Y,WANG B.Interannual Variations of the Boreal Summer Intraseasonal Oscillation in the AsianPacific Region[J].J Climate,2003,16(22),3572-3584.
[17]WEN M,ZHANG R H.Quasi-Biweekly Oscillation of the Convection around Sumatra and Low-Level Tropical Circulation in Boreal Spring[J].Mon Wea Rev,2008,136(1):189-205.
[18]WEN M,YANG S,KUMAR A,et al.Structure and origin of the Quasi-Biweekly Oscillation over the Tropical Indian ocean in boreal spring[J].J Atmos Sci,2010,67(6):1965-1982.
[19]ANNAMALAI H,SLINGO J M.Active/break cycles:diagnosis of the intraseasonal variability of the Asian Summer Monsoon[J].Clim Dyn,2001,18(1-2):85-102.
[20]MIAO Jin-hai,LAU K M.Low frequency oscillation(30-60 day)of summer monsoon rainfall over east Asia[J].Chin J Atmos Sci,1991,5(5):65-71(in Chinese).
[21]YANG Guang-ji.The Characteristics of Low Frequency Oscillation about Rainfall and Wind Disturbances over Eastern China[J].Chin J Atmos Sci,1992,16(1):103-110(in Chinese).
[22]JU Jian-hua,ZHAO Er-xu.Impacts of the low frequency oscillation in east Asian summer monsoon on the drought and flooding in the middle and lower valley of the Yangtze River[J].Chin J Atmos Sci,2005,21(2):163-171(in Chinese).
[23]LU Er,DING Yi-hui.Low frequency oscillation in east Asia during the 1991 excessively heavy rain over Changjiang-Huaihe river basin[J].Acta Meteor Sinica,1996,54(6):730-736(in Chinese).
[24]HE Yi-hua,WANG Xiao-ling,JIN Qi.The preliminary analysis for the impact of intraseasonal oscillation of the tropical convection over South China Sea on the droughts and floods of Changjiang and Huaihe river basin[J].JTrop Meteor,2006,22(3):259-264(in Chinese).
[25]CHEN L X,ZHU C W,WANG B,et al.Analysis of the characteristics of 30-60 day Low-frequency Oscillation over Asia during 1998 SCSMEX[J].Adv Atmos Sci,2001,18(4):623-638.
[26]ZHANG Yu-jie,LIU Shou-dong,REN Hong-li,et al.Characteristics and the inter-decadal variation of the low-frequency rainfall regimes over southern China in summer[J].Acta Meteor Sinica,2014,72(6):1205-1217(in Chinese).
[27]ADLER R F,KIDD C,PETTY G,et al.Intercomparison of global precipitation products:The third precipitation intercomparison project(PIP-3)[J].Bull Amer Meteor Soc,2001,82(7):1377-1396.
[28]GRUBER A,KRUEGER A F.The status of the NOAAoutgoing lonwave radiation data set[J].Bull Amer Meteor Soc,1984,65(9):958-962.
[29]KAINAY E,KANAMITUS M,KISTLER R,et al.The NCEP/NCAR 40-year reanalysis project[J].Bull Amer Meteor Soc,1996,77(3):437-471.
[30]LEE J Y,WANG B,WHEELER M C,et al.Real-time multivariate indices for the boreal summer intraseasonal oscillation over the Asian summer monsoon region[J].Clim Dyn,2013,40(1-2):493-509.
[31]LIN Ai-lan,TIM L,Li Chun-hui.Comparison of propagating boreal summer intraseasonal oscillation over tropics represented by wind and convection fields[J].JAppl Meteor Sci,2010,21(5):545-555(in Chinese).
[32]CAO Xin,REN Xue-juan,YANG Xiu-qun,et al.The quasi-biweekly oscillation characteristics of persistent severe rain and its general circulation anomaly over southeast China from May to August[J].Acta Meteor Sinica,2012,70(4):766-778(in Chinese).
[33]YANG J,WANG B,BAO Q.Biweekly and 21-30 Day Variations of the Subtropical Summer Monsoon Rainfall over the Lower Reach of the Yangtze River Basin[J].JClimate,2010,23(5):1146-1159.
[34]WEN Zhi-ping,DONG Ling-ying,WU Li-ji,et al.The Characteristics of 30-60 Day Oscillation and its Relation to the Durative Rainstorm in Guangdong[J].Acta Sci Nat Univ Sunyatseni,2007,46(5):98-103(in Chinese).
[35]REN Hong-li,ZHANG Pei-qun,CHOU Ji-fan,et al.Large-scale low-frequency rainfall regimes and their transition modes in summertime over China[J].Chin Sci Bull,2006,51(11):1355-1367.
[36]ZUO Jin-qing,REN Hong-li,LI Wei-jing,et al.Intraseasonal characteristics of the water vapor transport associated with the low-frequency rainfall regimes over Southern China in summer[J].Chin J Geophys,2009,52(5):922-935.
[37]QUE Zhi-ping,LI Chong-yin.Impacts of the monthly anomalies of intraseasonal oscillation over South China Sea and south Asia on the activity of the summer monsoon and the rainfall in eastern China[J].J Trop Meteor,2004,30(5):811-824(in Chinese).
[2]LI Chong-yin.Intraseasonal oscillation in the atmosphere[J].Chin J Atmos Sci,1990,14(1):32-45(in Chinese).
[3]LI C Y.Actions of summer monsoon troughs(ridges)and tropical cyclone over South Asia and moving CISK mode[J].Sci Sinica(B),1985,28(11):1197-1206.
[4]LI Chong-yin.New advances of the research on the atmospheric intraseasonal oscillation[J].Progr Nat Sci,2004,14(7):734-741(in Chinese).
[5]HUANG Hai-yan,HE Jin-hai,ZHU Zhi-wei.Advances in research on atmospheric intraseasonal oscillation and its application to extended range forecast[J].Meteor Disast Reduct Res,2011,34(3):1-8(in Chinese).
[6]YANG Qiu-ming.Interannual Variations of Intraseasonal Oscillation Pattern of OLR in Rainy Seasons in East Asia[J].Sci Technol Rev,2010,28(6):83-87.
[7]HSU P C,LI T.Role of the boundary layer moisture asymmetry in causing the eastward propagation of the Madden-Julian Oscillation[J].J Climate,2012,25(14):4914-4931.
[8]HE Jie-lin,WAN Qi-lin,GUAN Zhao-yong,et al.The observation research on intraseasonal oscillation propagating characteristics associated with tropical synoptic waves in Asia-western Pacific region in boreal summer[J].J Trop Meteor,2010,26(6):724-732(in Chinese).
[9]JU Jian-hua,SUN Dan,LV Jun-mei.The Relay Character Analysis of the Zonal and Longitudinal Propagations of the Atmospheric Intraseasonal Oscillation in the East Asian Monsoon Region[J].J Atmos Sci,2008,32(3):523-529(in Chinese).
[10]HE Jin-hai,YANG Song.Meridional propagation of east Asian low-frequency mode and midlatitude low-frequency waves[J].Acta Meteor Sinica,1992,50(2):190-198(in Chinese).
[11]LIN Ai-lan,LIANG Jian-yin,GU De-jun.Review of impacts of tropical atmospheric intraseasonal oscillation on east Asia monsoon and multiple time scales variation of tropical atmospheric intraseasonal oscillation[J].JTrop Meteor,2008,24(1):11-19(in Chinese).
[12]WANG B,RUI H.Synoptic climatology of transient tropical intraseasonal convection anomalies:1975-1985[J].Meteor Atmos Phys,1990,44(1):43-61.
[13]LAWRENCE D M,WEBSTER P J.The boreal summer intraseasonal oscillation:relationship between northward and eastward movement of convection[J].J Atmos Sci,2002,59(9):1593-1606.
[14]YANG Hui,LI Chong-yin.A Study of Propagation of Tropical Intraseasonal Oscillation and Its Influence Mechanism[J].Clim Environ Res,2005,10(2):145-156(in Chinese).
[15]LI Chong-yin,LONG Zhen-xia,MU Ming-quan.Atmospheric Intraseasonal Oscillation and Its Important Effect[J].Chin J Atmos Sci,2003,27(4):518-535(in Chinese).
[16]TENG H Y,WANG B.Interannual Variations of the Boreal Summer Intraseasonal Oscillation in the AsianPacific Region[J].J Climate,2003,16(22),3572-3584.
[17]WEN M,ZHANG R H.Quasi-Biweekly Oscillation of the Convection around Sumatra and Low-Level Tropical Circulation in Boreal Spring[J].Mon Wea Rev,2008,136(1):189-205.
[18]WEN M,YANG S,KUMAR A,et al.Structure and origin of the Quasi-Biweekly Oscillation over the Tropical Indian ocean in boreal spring[J].J Atmos Sci,2010,67(6):1965-1982.
[19]ANNAMALAI H,SLINGO J M.Active/break cycles:diagnosis of the intraseasonal variability of the Asian Summer Monsoon[J].Clim Dyn,2001,18(1-2):85-102.
[20]MIAO Jin-hai,LAU K M.Low frequency oscillation(30-60 day)of summer monsoon rainfall over east Asia[J].Chin J Atmos Sci,1991,5(5):65-71(in Chinese).
[21]YANG Guang-ji.The Characteristics of Low Frequency Oscillation about Rainfall and Wind Disturbances over Eastern China[J].Chin J Atmos Sci,1992,16(1):103-110(in Chinese).
[22]JU Jian-hua,ZHAO Er-xu.Impacts of the low frequency oscillation in east Asian summer monsoon on the drought and flooding in the middle and lower valley of the Yangtze River[J].Chin J Atmos Sci,2005,21(2):163-171(in Chinese).
[23]LU Er,DING Yi-hui.Low frequency oscillation in east Asia during the 1991 excessively heavy rain over Changjiang-Huaihe river basin[J].Acta Meteor Sinica,1996,54(6):730-736(in Chinese).
[24]HE Yi-hua,WANG Xiao-ling,JIN Qi.The preliminary analysis for the impact of intraseasonal oscillation of the tropical convection over South China Sea on the droughts and floods of Changjiang and Huaihe river basin[J].JTrop Meteor,2006,22(3):259-264(in Chinese).
[25]CHEN L X,ZHU C W,WANG B,et al.Analysis of the characteristics of 30-60 day Low-frequency Oscillation over Asia during 1998 SCSMEX[J].Adv Atmos Sci,2001,18(4):623-638.
[26]ZHANG Yu-jie,LIU Shou-dong,REN Hong-li,et al.Characteristics and the inter-decadal variation of the low-frequency rainfall regimes over southern China in summer[J].Acta Meteor Sinica,2014,72(6):1205-1217(in Chinese).
[27]ADLER R F,KIDD C,PETTY G,et al.Intercomparison of global precipitation products:The third precipitation intercomparison project(PIP-3)[J].Bull Amer Meteor Soc,2001,82(7):1377-1396.
[28]GRUBER A,KRUEGER A F.The status of the NOAAoutgoing lonwave radiation data set[J].Bull Amer Meteor Soc,1984,65(9):958-962.
[29]KAINAY E,KANAMITUS M,KISTLER R,et al.The NCEP/NCAR 40-year reanalysis project[J].Bull Amer Meteor Soc,1996,77(3):437-471.
[30]LEE J Y,WANG B,WHEELER M C,et al.Real-time multivariate indices for the boreal summer intraseasonal oscillation over the Asian summer monsoon region[J].Clim Dyn,2013,40(1-2):493-509.
[31]LIN Ai-lan,TIM L,Li Chun-hui.Comparison of propagating boreal summer intraseasonal oscillation over tropics represented by wind and convection fields[J].JAppl Meteor Sci,2010,21(5):545-555(in Chinese).
[32]CAO Xin,REN Xue-juan,YANG Xiu-qun,et al.The quasi-biweekly oscillation characteristics of persistent severe rain and its general circulation anomaly over southeast China from May to August[J].Acta Meteor Sinica,2012,70(4):766-778(in Chinese).
[33]YANG J,WANG B,BAO Q.Biweekly and 21-30 Day Variations of the Subtropical Summer Monsoon Rainfall over the Lower Reach of the Yangtze River Basin[J].JClimate,2010,23(5):1146-1159.
[34]WEN Zhi-ping,DONG Ling-ying,WU Li-ji,et al.The Characteristics of 30-60 Day Oscillation and its Relation to the Durative Rainstorm in Guangdong[J].Acta Sci Nat Univ Sunyatseni,2007,46(5):98-103(in Chinese).
[35]REN Hong-li,ZHANG Pei-qun,CHOU Ji-fan,et al.Large-scale low-frequency rainfall regimes and their transition modes in summertime over China[J].Chin Sci Bull,2006,51(11):1355-1367.
[36]ZUO Jin-qing,REN Hong-li,LI Wei-jing,et al.Intraseasonal characteristics of the water vapor transport associated with the low-frequency rainfall regimes over Southern China in summer[J].Chin J Geophys,2009,52(5):922-935.
[37]QUE Zhi-ping,LI Chong-yin.Impacts of the monthly anomalies of intraseasonal oscillation over South China Sea and south Asia on the activity of the summer monsoon and the rainfall in eastern China[J].J Trop Meteor,2004,30(5):811-824(in Chinese).