气象与环境科学
氣象與環境科學
기상여배경과학
METEOROLOGICAL AND ENVIRONMENTAL SCIENCES
2012年
1期
67-73
,共7页
致洪暴雨%水平风%VWP%径向速度%L波段雷达单测风
緻洪暴雨%水平風%VWP%徑嚮速度%L波段雷達單測風
치홍폭우%수평풍%VWP%경향속도%L파단뢰체단측풍
flood rainstorm%horizontal wind%VWP,radial velocity%L band radar wind
利用1°×1°NCEP再分析风场资料、多普勒雷达风廓线(VwP)和速度场产品、L波段雷达单测风资料,对发生在2007年7月29日和2010年7月23目的豫西山区两次致洪暴雨进行了分析。结果表明:在2007-07-29过程和2010-07-23过程的第二阶段中,风场垂直分布具有低层强西南风或南风辐合、高层辐散的特征;VWP产品中西南气流稳定深厚,有利于风暴的持久维持;平均径向速度产品上逆风区对暴雨落区和强度的变化有指示意义。卢氏雷达单测风资料可以弥补多普勒雷达对卢氏降水观测中因山体阻挡带来的缺陷,多种风资料在豫西山区致洪暴雨预报中可互为补充。
利用1°×1°NCEP再分析風場資料、多普勒雷達風廓線(VwP)和速度場產品、L波段雷達單測風資料,對髮生在2007年7月29日和2010年7月23目的豫西山區兩次緻洪暴雨進行瞭分析。結果錶明:在2007-07-29過程和2010-07-23過程的第二階段中,風場垂直分佈具有低層彊西南風或南風輻閤、高層輻散的特徵;VWP產品中西南氣流穩定深厚,有利于風暴的持久維持;平均徑嚮速度產品上逆風區對暴雨落區和彊度的變化有指示意義。盧氏雷達單測風資料可以瀰補多普勒雷達對盧氏降水觀測中因山體阻擋帶來的缺陷,多種風資料在豫西山區緻洪暴雨預報中可互為補充。
이용1°×1°NCEP재분석풍장자료、다보륵뢰체풍곽선(VwP)화속도장산품、L파단뢰체단측풍자료,대발생재2007년7월29일화2010년7월23목적예서산구량차치홍폭우진행료분석。결과표명:재2007-07-29과정화2010-07-23과정적제이계단중,풍장수직분포구유저층강서남풍혹남풍복합、고층복산적특정;VWP산품중서남기류은정심후,유리우풍폭적지구유지;평균경향속도산품상역풍구대폭우락구화강도적변화유지시의의。로씨뢰체단측풍자료가이미보다보륵뢰체대로씨강수관측중인산체조당대래적결함,다충풍자료재예서산구치홍폭우예보중가호위보충。
Based on NCEP (1°×1°) reanalysis wind date, Doppler radar VWP and velocity prod- ucts, and L band radar wind data, two flood rainstorm occurred in July 29, 2007 and July 23, 2010 in the mountainous area of western Henan are analyzed. The results show at the second stage of two process, wind vertical distribution has the feature of strong southwest or south wind convergence in low-level and divergence in high level; the southwest airflow is deep stability in VWP products that make for the storm' s lasting; the changes of adverse wind area of radial velocity products have significance on rain- storm area and intensity. L band radar wind data can compensate flaw that brought by mountain block for the Doppler radar precipitation observation of Lushi. A variety of wind data can complement each other in flood rainstorm forecast in the mountain area of western Henan.