Page 71 - 《高原气象》2022年第6期
P. 71

高     原      气     象                                 41 卷
              1434
                 旱区研究,30(3):396-403. DOI:10. 13866/j. azr. 2013. 03. 019.  issn. 1000-0534. 2020. 00003.
             况雪源,张耀存,2006a. 东亚副热带西风急流位置异常对长江中下                  杨莲梅,张庆云,2007. 新疆北部汛期降水年际和年代际异常的环
                 游夏季降水的影响[J]. 高原气象,25(3):382-389.                  流特征[J]. 地球物理学报,50(2):412-419. DOI:10. 3321/j.
             况雪源,张耀存,2006b. 东亚副热带西风急流季节变化特征及其热                     issn:0001-5733. 2007. 02. 011.
                 力影响机制探讨[J]. 气象学报,64(5):564-575. DOI:10.        杨莲梅,张庆云,2008. 夏季亚洲副热带西风急流气候特征[J]. 气
                 3321/j. issn:0577-6619. 2006. 05. 003.            候与环境研究,(1):10-20. DOI:10. 3878/j. issn. 1006-9585.
             李崇银,王作台,林士哲,等,2004. 东亚夏季风活动与东亚高空西                     2008. 01. 02.
                 风急流位置北跳关系的研究[J]. 大气科学,28(5):641-658.           姚俊强,杨青,毛炜峄,等,2016. 气候变化和人类活动对中亚地区
             陆日宇,林中达,张耀存,2013. 夏季东亚高空急流的变化及其对                      水文环境的影响评估[J]. 冰川冻土,38(1):222-230. DOI:
                 东亚季风的影响[J]. 大气科学,37(2):331-340. DOI:10.           10. 7522/j. issn. 1000-0240. 2016. 0025.
                 3878/j. issn. 1006-9895. 2012. 12310.          叶笃正,陶诗言,李麦村,1958. 在六月和十月大气环流的突变现
             马鹏里,杨金虎,卢国阳,等,2020. 西北地区东部气候的转折性变                     象[J]. 气象学报,16(4):249-263.
                 化[J]. 高原气象,39(4):840-850. DOI:10. 7522/j. issn. 1000-  张云惠,杨莲梅,肖开提·多莱特,等,2012. 1971-2010年中亚低涡
                 0534. 2019. 00093.                                活 动 特 征[J]. 应 用 气 象 学 报 ,23(3):312-321. DOI:10.
             汤懋苍,梁娟,邵明镜,等,1984. 高原季风年际变化的初步分析                      11898/1001-7313. 20120307.
                [J]. 高原气象,3(3):76-82.                           赵勇,王前,黄安宁,2017. 中亚和南亚热力差异对塔里木盆地夏
             王天竺,赵勇,2021. 青藏高原和热带印度洋 5 月热力异常与新疆                    季降水的影响[J]. 气候与环境研究,22(5):574−586. DOI:
                 夏季降水的关系[J]. 高原气象,40(1):1-14. DOI:10. 7522/j.      10. 3878/j. issn. 1006-9585. 2017. 16178.




                       Relationship between the Subtropical Westerly Jet and Summer
                                   Rainfall over Central Asia from 1961 to 2016


                                                 REN Guoqiang,ZHAO Yong
                          (Plateau Atmosphere & Environment Key Laboratory of Sichuan Province/School of Atmospheric Sciences,
                                  Chengdu University of Information Technology,Chengdu 610225,Sichuan,China)
             Abstract:Based on the reanalysis data provided by the National Center for Environmental Prediction(NCEP)/
             National Center for Atmospheric Research(NCAR)and the monthly precipitation data provided by the Global
             Precipitation Climatology Center(GPCC)from 1961 to 2016,the relationships between the subtropical westerly
             jet and summer rainfall over central Asia were analyzed. The results show that when the subtropical westerly jet
             shifts south,the anomalous cyclone determines the central Asia,meantime the anomalous anticyclone over the
             Indian Peninsula and anomalous cyclone over central Asia transport the water vapor from the Arabian Sea into the
             central Asia,which cause more summer rainfall over central Asia,vice versa. The plateau monsoon over the TQ‐
             inghai-Xizang Plateau and the surface sea temperature(SST)tropical Indian Ocean are well related to the jet po‐
             sition of subtropical westerly jet over central Asia. When positive anomalies of SST over whole tropical Indian
             Ocean,corresponding to weakened south Asian summer monsoon,it causes less rainfall and weakened latent
             heat over the Indian Peninsula. Based on the Gill atmospheric response,there is an anomalous cyclone over
             northwest flank of Indian Peninsula in upper troposphere,which causes the cooling of temperature in upper tro‐
             posphere over central Asia;When the strengthened plateau monsoon over the Qinghai-Xizang Plateau,corre‐
             sponding to more rainfall and strengthened latent heat,it causes an anomalous anticyclone over northwest flank
             of Qinghai-Xizang Plateau,which results in the cooling of temperature in upper troposphere over central Asia.
             Under the joint action of the plateau monsoon and SST over the Indian Ocean,the cooling of temperature in up‐
             per troposphere forms an anomalous cyclone in upper troposphere over central Asia,it causes more strengthened
             westerly at middle-low latitudes,corresponding to the jet shifting south,vice versa.
             Key words:Qinghai-Xizang Plateau monsoon;subtropical westerly jet;SST warming in tropical Indian Ocean;
             central Asia arid land;summer rainfall
   66   67   68   69   70   71   72   73   74   75   76