沙漠与绿洲气象
沙漠與綠洲氣象
사막여록주기상
DESERT AND OASIS METEOROLOGY
2012年
5期
25-29
,共5页
飑线%垂直风切变%强对流%雷雨大风%冰雹%短时强降水
颮線%垂直風切變%彊對流%雷雨大風%冰雹%短時彊降水
박선%수직풍절변%강대류%뇌우대풍%빙박%단시강강수
squall line%vertical wind shear%severe convection%high speed wind%hail%short-durationheavy rain
应用常规天气图资料、地面加密降水观测资料、探空资料及美国NCEP／NCAR再分析资料，对2010年7月19日山东飑线过程和2011年7月26日河北飑线过程进行了对比分析，结果表明，两次过程的相同点为：两次过程均位于500hPa高空槽前：两次飑线过程均产生了雷雨大风和短时强降水天气；湿层均较深厚；下沉有效位能均较大：不同点为：2010年7月19日山东飑线过程属于有明显垂直风切变环境中的飑线；对流不稳定能量相对较低、而2011年7月26日河北飑线过程属于风垂直切变相对小的环境中的飑线；对流不稳定能量很大；除了雷雨大风和短时强降水天气之外还产生了冰雹
應用常規天氣圖資料、地麵加密降水觀測資料、探空資料及美國NCEP／NCAR再分析資料，對2010年7月19日山東颮線過程和2011年7月26日河北颮線過程進行瞭對比分析，結果錶明，兩次過程的相同點為：兩次過程均位于500hPa高空槽前：兩次颮線過程均產生瞭雷雨大風和短時彊降水天氣；濕層均較深厚；下沉有效位能均較大：不同點為：2010年7月19日山東颮線過程屬于有明顯垂直風切變環境中的颮線；對流不穩定能量相對較低、而2011年7月26日河北颮線過程屬于風垂直切變相對小的環境中的颮線；對流不穩定能量很大；除瞭雷雨大風和短時彊降水天氣之外還產生瞭冰雹
응용상규천기도자료、지면가밀강수관측자료、탐공자료급미국NCEP／NCAR재분석자료，대2010년7월19일산동박선과정화2011년7월26일하북박선과정진행료대비분석，결과표명，량차과정적상동점위：량차과정균위우500hPa고공조전：량차박선과정균산생료뇌우대풍화단시강강수천기；습층균교심후；하침유효위능균교대：불동점위：2010년7월19일산동박선과정속우유명현수직풍절변배경중적박선；대류불은정능량상대교저、이2011년7월26일하북박선과정속우풍수직절변상대소적배경중적박선；대류불은정능량흔대；제료뇌우대풍화단시강강수천기지외환산생료빙박
Based on the conventional surface and upper observation data, densified observation of precipitation data, sounding data and NCEP reanalysis data, the two squall lines which occurred on the July 19, 2010 and July 26, 2011 were analyzed. The results are as follows. The same characteristics are: The two squall lines both occurred ahead of the 500 hPa trough, and accompanied by high speed winds and short-duration heavy rain, The wet layers were both deep, DCAPE were large in the two processes. The differences are that the squall lines occurred oil July 19, 2010 had obviously vertical wind shear, and CAPE was relatively low. The squall lines occurred on July 26, 2011 had small vertical wind shear. The convective unstable energy was very large. Besides the high speed wind and short-duration heavy rain, the squall line produced the hail as well.
