气象与环境科学
氣象與環境科學
기상여배경과학
METEOROLOGICAL AND ENVIRONMENTAL SCIENCES
2012年
1期
14-20
,共7页
夏季降水%大气环流%赤道东太平洋海温%合成分析%相关分析
夏季降水%大氣環流%赤道東太平洋海溫%閤成分析%相關分析
하계강수%대기배류%적도동태평양해온%합성분석%상관분석
summer precipitation%general circulation%SST in eastern equatorial Pacific%compositeanalysis%correlation analysis
利用山西省58个台站1960-2009年有观测记录的50a夏季降水资料和NCEP／NCAR逐月再分析位势高度场、NOAA逐月海温场资料，研究了山西省旱、涝年大气环流特征差异，并进一步讨论了山西省夏季降水异常与赤道东太平洋（Nino区）海温异常的关系。研究结果表明：山西省夏季降水异常年从前期春季到同期夏季，欧亚中高纬度500hPa位势高度的大气环流存在异常，尤其是乌拉尔山高压脊、贝加尔湖低槽及西太平洋副热带高压等大尺度环流系统都有明显的变化；850hPa风场上蒙古气旋南部纬向风的异常，以及我国东部到华北地区经向风（东亚夏季风）的异常，是直接影响山西省夏季降水的重要环流因子；赤道东太平洋秘鲁冷水舌和太平洋东岸暖水舌均是山西省夏季降水的敏感区，Nino区域前期海温异常对山西省夏季降水有显著的影响，即Nino区域前期海温偏低有利于山西省夏季降水偏多。
利用山西省58箇檯站1960-2009年有觀測記錄的50a夏季降水資料和NCEP／NCAR逐月再分析位勢高度場、NOAA逐月海溫場資料，研究瞭山西省旱、澇年大氣環流特徵差異，併進一步討論瞭山西省夏季降水異常與赤道東太平洋（Nino區）海溫異常的關繫。研究結果錶明：山西省夏季降水異常年從前期春季到同期夏季，歐亞中高緯度500hPa位勢高度的大氣環流存在異常，尤其是烏拉爾山高壓脊、貝加爾湖低槽及西太平洋副熱帶高壓等大呎度環流繫統都有明顯的變化；850hPa風場上矇古氣鏇南部緯嚮風的異常，以及我國東部到華北地區經嚮風（東亞夏季風）的異常，是直接影響山西省夏季降水的重要環流因子；赤道東太平洋祕魯冷水舌和太平洋東岸暖水舌均是山西省夏季降水的敏感區，Nino區域前期海溫異常對山西省夏季降水有顯著的影響，即Nino區域前期海溫偏低有利于山西省夏季降水偏多。
이용산서성58개태참1960-2009년유관측기록적50a하계강수자료화NCEP／NCAR축월재분석위세고도장、NOAA축월해온장자료，연구료산서성한、로년대기배류특정차이，병진일보토론료산서성하계강수이상여적도동태평양（Nino구）해온이상적관계。연구결과표명：산서성하계강수이상년종전기춘계도동기하계，구아중고위도500hPa위세고도적대기배류존재이상，우기시오랍이산고압척、패가이호저조급서태평양부열대고압등대척도배류계통도유명현적변화；850hPa풍장상몽고기선남부위향풍적이상，이급아국동부도화북지구경향풍（동아하계풍）적이상，시직접영향산서성하계강수적중요배류인자；적도동태평양비로랭수설화태평양동안난수설균시산서성하계강수적민감구，Nino구역전기해온이상대산서성하계강수유현저적영향，즉Nino구역전기해온편저유리우산서성하계강수편다。
Based on NCEP/NCAR monthly reanalysis geo-potential height,NOAA monthly SST data and the 50 a （1960-2009） rainfall over 58 meteorological stations in Shanxi province, the unusual characteristics of general circulation in drought and flood years of Shanxi are investigated, and the correlationbetween the summer precipitation index of Shanxi province and the SST field in eastern equatorial Pacific is further studied. Results show that in the years of the summer precipitation anomalies of Shanxi, the large-scale circulation systems of 500 hPa geo-potential height are obviously different, such as a high- pressure ridge over the Ural Mountain and deep trough over Baikal Lake and West Pacific subtropicalhigh. The zonal wind of 850 hPa in the southern of Mongolian cyclone and Meridional wind （East Asian summer monsoon） over eastern regions of China to North China tend to exhibit anomalies, which have great impact on the summer rainfall of Shanxi province. The cold SST tongue from eastern equatorial Pa- cific SST and the warm SST tongue from the East Pacific coast often effect a change of circulation sys- tems, which has a significant impact on summer precipitation of Shanxi. Nino region SST anomalies has a significant impact on the summer precipitation of Shanxi province, that is, the lower sea surface tempera- ture of Nino region is conducive to summer more rainfall of Shanxi province.
