摘要
该文基于贵州低频降水和东亚水汽输送路径,对比分析低频降水多(少)年的水汽差异和先兆海温差异,得到主要结论有:①7月开始在欧亚大陆的中纬度地区形成“两槽一脊”的环流形势;8、9月“两槽一脊”环流形势稳固。副热带高压的西伸脊点位于120 oE附近,环流形势逐渐稳定,南方地区降水有所减弱;②影响贵州地区水汽输送的水汽通道主要为孟加拉湾、南海和西北太平洋,尤其是从孟加拉湾经中南半岛进入的西南风水汽输送和南半球经南海的越赤道气流;③低频强降水年频次多年与拉尼娜事件从准备到爆发再到衰弱的不同位相期相对应,低频强降水年频次少年与厄尔尼诺事件从准备到爆发再到衰弱的不同位相期相对应。
Based on the low-frequency precipitation in Guizhou and the water vapor transport path in East Asia,this paper compares and analyzes the water vapor differences and the precursor SST differences in more(less)low-frequency precipitation years,and the main conclusions are as follows:①The circulation pattern of"two trough and one ridge"began to form in the mid-latitude region of Eurasia in July;The circulation situation of"two trough and one ridge"was stable in August and September.The western ridge point of the subtropical high is located near 120°E,the circulation situation is gradually stable,and the precipitation in the southern region is weakened.②The main water vapor transport channels in Guizhou are the Bay of Bengal,the South China Sea and the Northwest Pacific Ocean,especially the water vapor transport from the Bay of Bengal through the Indo-China Peninsula and the trans-equatorial air flow from the Southern Hemisphere over the South China Sea.③Low frequency annual precipitation frequency in the sea surface temperature(SST)over many years of the evolution of the tropical eastern Pacific anomaly largely reflects a la Nina event from the different phase of outbreak and weak period,low precipitation years frequency of juvenile sea surface temperature(SST)over the tropical eastern Pacific anomaly largely reflects the evolution of an el nino event from the different phase of outbreak and weak.
作者
郑蓓
白慧
于飞
王梦玲
任曼琳
ZHENG Bei;BAI Hui;YU Fei;WANG Mengling;REN Manlin(Guizhou Institute of Mountain Environment and Climate,Guiyang 550002,China;Guizhou Province Key Laboratory of Mountain Climate and Resources,Guiyang 550002,China;Shi Bing Meteorological Bureau of Guizhou Province,Shibing 556200,China;Guizhou Climate Center,Guiyang 550002,China)
出处
《中低纬山地气象》
2022年第6期15-20,共6页
Mid-low Latitude Mountain Meteorology
基金
贵州省基础研究计划(黔科合基础-ZK[2022]一般273):喀斯特石漠化植被生态质量变化对气候因子的响应。
