暴雨灾害
暴雨災害
폭우재해
TORRENTIAL RAIN AND DISASTERS
2011年
4期
335-342
,共8页
GRAPES_meso%LAPS中尺度分析%西南涡暴雨%中尺度数值模拟%NCEP%3-class降水方案%混合降水方案%诊断分析%spin%up时间
GRAPES_meso%LAPS中呎度分析%西南渦暴雨%中呎度數值模擬%NCEP%3-class降水方案%混閤降水方案%診斷分析%spin%up時間
GRAPES_meso%LAPS중척도분석%서남와폭우%중척도수치모의%NCEP%3-class강수방안%혼합강수방안%진단분석%spin%up시간
GRAPES_meso%LAPS meso-scale analysis%southwest vortex rainstorm%meso-scale numerical simulation%NCEP 3-class precipitation scheme%mixed precipitation scheme%diagnostic analysis%spin up
用GRAPES_meso数值模式和LAPS中尺度局地分析资料,对2.5 km和5 km两种分辨率,采用NCEP 3-class降水方案和2种混合降水方案,给定不同的spin up时间,设计18种组合方案,对2008年7月一次西南涡暴雨过程做数值模拟。在模拟可信的前提下,对西南涡暴雨的天气学成因进行分析。模拟试验表明,LAPS初值场经过3~6 h的spin up＂磨合＂,可获得比较协调的物理量场,NCEP 3-class方案用于2.5 km分辨率的模拟效果较好。模拟也表明,直接用NCEP再分析资料做初值场,较用以NCEP资料为背景场做实时中尺度观测资料融合的LAPS初值场,后者较前者模拟的中尺度对流雨团有改进,模拟的雨带与实况更接近,且模拟的垂直速度,在积分前4 h（spin up时间）有优势,改善了最初降水发生的动力结构。模拟结果的诊断计算与分析表明,该＂西南涡—切变线＂暴雨发生在以系统性上升运动为背景的高湿区中,由于中、小尺度重力波垂直运动而产生的中尺度对流性（雨团）降水。
用GRAPES_meso數值模式和LAPS中呎度跼地分析資料,對2.5 km和5 km兩種分辨率,採用NCEP 3-class降水方案和2種混閤降水方案,給定不同的spin up時間,設計18種組閤方案,對2008年7月一次西南渦暴雨過程做數值模擬。在模擬可信的前提下,對西南渦暴雨的天氣學成因進行分析。模擬試驗錶明,LAPS初值場經過3~6 h的spin up＂磨閤＂,可穫得比較協調的物理量場,NCEP 3-class方案用于2.5 km分辨率的模擬效果較好。模擬也錶明,直接用NCEP再分析資料做初值場,較用以NCEP資料為揹景場做實時中呎度觀測資料融閤的LAPS初值場,後者較前者模擬的中呎度對流雨糰有改進,模擬的雨帶與實況更接近,且模擬的垂直速度,在積分前4 h（spin up時間）有優勢,改善瞭最初降水髮生的動力結構。模擬結果的診斷計算與分析錶明,該＂西南渦—切變線＂暴雨髮生在以繫統性上升運動為揹景的高濕區中,由于中、小呎度重力波垂直運動而產生的中呎度對流性（雨糰）降水。
용GRAPES_meso수치모식화LAPS중척도국지분석자료,대2.5 km화5 km량충분변솔,채용NCEP 3-class강수방안화2충혼합강수방안,급정불동적spin up시간,설계18충조합방안,대2008년7월일차서남와폭우과정주수치모의。재모의가신적전제하,대서남와폭우적천기학성인진행분석。모의시험표명,LAPS초치장경과3~6 h적spin up＂마합＂,가획득비교협조적물리량장,NCEP 3-class방안용우2.5 km분변솔적모의효과교호。모의야표명,직접용NCEP재분석자료주초치장,교용이NCEP자료위배경장주실시중척도관측자료융합적LAPS초치장,후자교전자모의적중척도대류우단유개진,모의적우대여실황경접근,차모의적수직속도,재적분전4 h（spin up시간）유우세,개선료최초강수발생적동력결구。모의결과적진단계산여분석표명,해＂서남와—절변선＂폭우발생재이계통성상승운동위배경적고습구중,유우중、소척도중력파수직운동이산생적중척도대류성（우단）강수。
Using GRAPES_meso numerical model and the LAPS meso-scale data with 2.5 km and 5 km resolution,a case of southwest vortex rainstorm in July 2008 is numerically simulated with 18 test programs designed with three kinds of precipitation schemes（NCEP 3-class and two kinds of mixed precipitation schemes） and given spin up times.On the premise that the simulated results were creditable the synoptic cause of the rainstorm were analyzed.The results show that LAPS initial field can get a coordinated physical field after 3-6 h spin up ＂running in＂ and the simulation result of NCEP 3-class scheme is better for the 2.5 km resolution.The simulation result also shows that the simulation results made using LAPS data as initial field are better than that using NCEP reanalysis data,that is,simulated meso-scale convective rain clusters have improvement,the simulated rain belt is closer to the observation,and the simulated vertical velocity has an advantage of 4h（spin up time） before the initial integration,which improves the power structure of initial precipitation.Diagnostic analysis of simulation results shows that the ＂southwest vortex-shear line＂ storm happens in a high humidity area with the background of systematic upward motion,and is convective（rain cluster） precipitation due to vertical movement of the meso-scale or small-scale gravity waves.
