气象与环境科学
氣象與環境科學
기상여배경과학
METEOROLOGICAL AND ENVIRONMENTAL SCIENCES
2012年
3期
10-16
,共7页
黄河气旋%涡度平流%耦合%对称不稳定
黃河氣鏇%渦度平流%耦閤%對稱不穩定
황하기선%와도평류%우합%대칭불은정
Yellow River cyclone%vorticity advection%coupling%symmetric instability
利用NCEP/NCAR再分析资料和常规气象资料,对2001年6月28-29日发生在河南的一次黄河气旋暴雨过程进行了诊断分析。结果表明：黄河气旋的稳定少动是造成这次暴雨的直接原因,高层辐散与中层正涡度平流对黄河气旋形成和发展起了重要作用。这次过程的水汽主要来自副高东南侧的海上,孟加拉湾的水汽也有一定的贡献。暴雨区的中低层对称不稳定的存在,导致上升运动和水汽输送的加强,造成降水的增幅。
利用NCEP/NCAR再分析資料和常規氣象資料,對2001年6月28-29日髮生在河南的一次黃河氣鏇暴雨過程進行瞭診斷分析。結果錶明：黃河氣鏇的穩定少動是造成這次暴雨的直接原因,高層輻散與中層正渦度平流對黃河氣鏇形成和髮展起瞭重要作用。這次過程的水汽主要來自副高東南側的海上,孟加拉灣的水汽也有一定的貢獻。暴雨區的中低層對稱不穩定的存在,導緻上升運動和水汽輸送的加彊,造成降水的增幅。
이용NCEP/NCAR재분석자료화상규기상자료,대2001년6월28-29일발생재하남적일차황하기선폭우과정진행료진단분석。결과표명：황하기선적은정소동시조성저차폭우적직접원인,고층복산여중층정와도평류대황하기선형성화발전기료중요작용。저차과정적수기주요래자부고동남측적해상,맹가랍만적수기야유일정적공헌。폭우구적중저층대칭불은정적존재,도치상승운동화수기수송적가강,조성강수적증폭。
Based on NCEP/NCAR reanalysis data and routine meteorological data, the heavy rain caused by Yellow River cyclone, which happened from June 28 to 29, 2001 in Henan province is ana- lyzed. The results show that the less moving of Yellow River cyclone is the direct reason of the heavy rain. Upper-level divergence and positive vorticity advection of middle layer play important roles in the formation and development of Yellow River cyclone. Water vapor of this process mainly comes from sea surface located on southeast of subtropical high, which comes from bay of Bengal has a certain contribution. Because of the symmetric instability of middle and low level over heavy rain area, ascending motion and water vapor transport are strengthened, which finally caused the change of precipitation.
