Nov. 21, D.I. Lee, C.H. You, M. Jang, D.S. Kim, S.M. Jang, J.H. Jeong
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1 9 th Weather Radar Workshop The field observations at the southern area of Korea Nov. 21, 2008 D.I. Lee, C.H. You, M. Jang, D.S. Kim, S.M. Jang, J.H. Jeong Department of Environmental Atmospheric Sciences, Pukyong National University, Busan, Korea Global Research Laboratory
2 Outline 1. Introduction ti of Field Observations 2006 to Preliminary Results using data in 2007 Synoptic conditions Wind fields from Dual Doppler Radar Analysis Wind shear from Radio sonde and DDRA Drop Size Distributions 3. Summary
3 Experiment design Jeju Island IEODO Typhoon
4 Jejudo and Marado in 2006 S-band Doppler radars(kma) Rain gauge ( type: 0.1 mm, 0.5 mm) Radio sonde POSS AWS Filter paper
5 Okinawa, JAPAN in X-band Doppler Radar ( Red, Blue ) Rain gauge (type : 0.1 mm) Joss-Waldvogel Disdrometer (J. W. Disdrometer) AWS Radio sonde Filter paper
6 Ieodo in 2007 and 2008 S-band Doppler Radars(KMA) Rain gauge (type: 0.1 mm, 0.5 mm) Radio sonde Filter paper LPC Rain sampling
7 Chujado in 2007 S-band Doppler radars(kma) Rain gauge (type: 0.1 mm, 0.5 mm) Radio sonde POSS disdrometer and filter papers AWS Filter paper LPC
8 Taiwan in 2008 From Prof. GyuWon Lee VertiX MRR(M5) JWD(J1) POSS(P3) 2DVD ISS INSTRUMENT Tipping bucket raingauge ORGANIZATION KNU (Korea) KNU (Korea) NCU1 (Taiwan) EC1 (Canada) NCU (Taiwan) NCU (Taiwan) CWB (Taiwan) STATION SuperSite : Quan-Xin Elementary School Traditional raingaugege NTU (Taiwan) an) POSS(P1) McGill (Canada) Gau-Lan POSS(P2) PKNU (Korea) Te-Wen M4 POSS(P4) EC2 (Canada) ada) Ho-Juan POSS(P5) EC3 (Canada) Si-Wei MRR(M1) CCU1 (Taiwan) Tu-Ku MRR(M2) CCU2 (Taiwan) Lin-Luo NCAR S-POL JDOP MRR(M3) CCU3 (Taiwan) Shi-Long MRR(M4) CCU4 (Taiwan) Ma-Jia. V. O. JWD(J2) CCU (Taiwan) Ma-Jia J. H. S JWD(J3) NCU2 (Taiwan) Quan-Fu JWD(J4) NCU3 (Taiwan) Fan-Hua JWD(J5) NCU4 (Taiwan) Chin-San
9 36 Preliminary results Gwangju At Chujado 35 : From June 21 to July 10, Heuksando Sonde Radar Jindo Gosan Chujado Seongsan Location of observation site Observation Instruments : S band radars, POSS, Raingauges, Radiosonde, Filter papers, p LPC, Rain sampling -Synoptic condition : Surface weather chart, NCEP/NCAR reanalysis - Dual Doppler analysis : Gosan and Seongsan S-band radar - Drop Size Distributions : POSS - Satellite images, raingauge data, sounding data
10 Case study : Chang-ma front accompanied by strong low pressure(05 July 2007 ~ 06 July 2007) Accumulated rainfall amount for date Rainfall amo ount(mm) Date 138.4mm
11 Case study : Chang-ma front accompanied by strong low pressure(05 July 2007 ~ 06 July 2007) 09 KST 06 July (mm/hr) Rainrate :00 20:00 0:00 4:00 8:00 12:00 16:00 July 05 Time July 06
12 NCEP/NCAR reanalysis data [03 KST 06 July 2007] (a) Surface (b) 850 hpa WS & P WS & θ E (c) 500 hpa (d) 300 hpa WS &RV WS & hgt
13 Vertical Profile of Reflectivity at Chujado Case 1 Case 2 Case 3 July 05 July 06
14 Radar Images with Case Case 1 Case 2 Case 3
15 Dual Doppler analysis CASE Ⅰ July 05 July 06 Chujado POSS
16 Dual Doppler analysis CASE Ⅱ July 05 July 06
17 Dual Doppler analysis CASE Ⅲ July 05 July 06
18 Vertical wind shear analysis by sonde observation :00 KST TVWS 10 8 m/s/100m Total Vertical Wind Shear(TVWS) Directional Vertical Wind Shear(DVWS) (km) Height( WS WD θ θe θs RH DVWS 10 Degree/100m 8 Height(km m) RH(%)
19 Vertical wind shear analysis by sonde observation :00 KST TVWS 10 8 m/s/100m sure (hpa) Pres (km) Height( WS WD θ θe θs RH Speed of vertical motion of sonde (m/s) DVWS 10 Degree/100m 8 Height(km m) RH(%)
20 Case 1 Case 2 Case 3 10 July 05 July 06 TVWS 8 He eight(km) :30 21:40 01:00 Time 04:20 07:40 11:00 14:30 m/s/500m
21 Case 1 Case 2 Case 3 10 July 05 July 06 DVWS 8 He eight(km) :30 21:40 01:00 T04:20 i m e 07:40 11:00 14:30 Degree/500m
22 Raindrop size distributions Case 1 18:00 19:40 21:20 23:00 00:40 July 05 July 06
23 Raindrop size distributions Case 2 01:00 01:50 02:40 03:30 04:20 05:00 July 06 July 06
24 Raindrop size distributions Case 3 05:00 06:40 08:20 10:00 11:40 13:20 July 06 July 06
25 Raindrop size distributions DSD on the ground during the passage of the precipitation systems μ N( D) = N 0D exp( ΛD) CASE Ⅰ CASE Ⅱ CASE Ⅲ R(mm/hr) μ Λ N Sample NO
26 Summary 10 km 10 m/s The inside of Changma front 30dBz >> 30dBz << 8 km 6 km 6 km 6 km 4 km 4 km 2 km DSD Rain rate (mm/hr) Number concentration Total precipitation by raingauge Case 1 Case 2 Case High : at the range of larger than 2mm in diameter Low : at the all range High : at the range of smaller than 2mm in diameter 55.4mm 11.7mm 71.3mm
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