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Korea Enhanced Observing Period(KEOP)

The 6th METRI-IAP workshop, 23-24 May 2006 , Seogwipo, Jeju, Korea. Korea Enhanced Observing Period(KEOP). Young-Jean Choi, Jae-Cheol Nam, and Ki-Hoon Kim Forecast Research Laboratory Meteorological Research Institute (METRI)/KMA. Contents. Objectives of KEOP Ground observational system

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Korea Enhanced Observing Period(KEOP)

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  1. The 6th METRI-IAPworkshop, 23-24 May 2006 , Seogwipo, Jeju, Korea Korea Enhanced Observing Period(KEOP) Young-Jean Choi, Jae-Cheol Nam, and Ki-Hoon Kim Forecast Research Laboratory Meteorological Research Institute(METRI)/KMA

  2. Contents • Objectives of KEOP • Ground observational system • Haenam super-sites for KEOP • IOP 2006 • Future plan • Summary

  3. Natural disaster from flash flood Flash flood causes the most damaging natural disaster in Korea Causes of meteorological disasters (average of 1983 to 1992) Humandamages Damages caused by heavy rain fall and flash flood, due to the typhoon RUSA in 2002 142 67 58 3 Heavy rain Tropical cyclone Severe storm Hailstorm Human loss: 246 Disaster relief expenditure about 5 billion USD

  4. Objective of KEOP • Better understanding of dynamical structure and evolution of high-impact weather systems(mainly warm season precipitation episode) • Enhance the understanding of the land-atmosphere interaction and physics of cloud & precipitation. • Develop optimal observing strategies(targeting observation) related to data assimilation procedures.

  5. Ground Observation Network Automatic Weather Station Conventional Station Observation Network

  6. Ground Observation Network • Automatic Weather Station(AWS) Network - ASOS(Automated Surface Observing System) : 42 sites • - Manned AWS(Automatic Weather System) : 35 sites • - Unmanned AWS(Automatic Weather System) : 459 sites ASOS AWS MountainAWS

  7. Ground Observation Network • Spatial resolution • ASOS + AWS network : 13 km • Unmanned AWS network : 14 km • Temporal resolution : 1 min. • Data Collection • - DSU Modem leased line(9,600 bps) • - DSU Modem + Microwave comm. • - ORBCOMM Satellite comm.

  8. Radar Network of KMA Research radar Muan Operational radar • 5 C-band radars • Baekryungdo • Kunsan • Donghae • Cheju • Chungsong • 4 S-band radars • Gwangduksan • Jindo • Gwannaksan • Pusan • 1 C-band(Airport) • Incheon Research radar • 1 X-band radar • Muan

  9. Field Experiments Network in KEOP • METRI, Muan(X-band) • Gunsan(S-band) • Upper air observation site Muan • Haenam Special observation site • - Autosonde • - Wind profiler • - Micro rain radar • - Optical rain gauge • - Synoptic weather observation • JinDo(S-band) • Gosan(S-band) • These, used together, will evolve over time to meet the challenging objectives, including • the 3-D information on the development and structure of precipitating systems.

  10. Sensitivity test Including observation data With (sonde(3), radar, WPR) Without  700hPa  700hPa   700hPa 700hPa  850hPa  850hPa  850hPa  850hPa  925hPa   925hPa 925hPa  925hPa : Analysis(18UTC) : Forecast(21UTC)

  11. Forecast effect for IOP(KEOP) data 24h accumulated rain & difference Without KEOP data With KEOP data

  12. Meso high Pre meso low (1220UTC) The convectively induced subsidence may warm in the mid-to-upper troposphere ahead of convective storm. This warming may play role in the mesolow formation. Meso high (1230UTC) Downdraft in storm account for the observed pressure rise. Downdraft is driven by precipitation drag and evaporation cooling of the raindrops.

  13. 3 9 ■ IOP: 6.21 - 7.5 IOP : 6.21-22, 6.25, 6.29-7.1, 7. 4- 7.5 ■Sonde Observation ■ Dual Doppler Observation JindoS-band Mooahn X-band Gosan S-band 3 8 3 7 Haenam 4-8/day Namwon Geochang 3 6 Baekryoung-do Sogcho Heuksan-do Pohang Kwanju Gosan operation 2 → 4 METRI/KMA 3 5 3 4 3 3 124 125 126 127 128 129 130 131 KEOP-2006 activity ■ Observing equipments Windprofiler, AWS, Flux tower, Micro Rain Radar, Optical Rain Gage, Autosonde, GPS rawinsonde

  14. MCSs in the Changma front : case (2006. 6. 30)

  15. MCS in the Changma front Analysis

  16. B A A C C B C Analysis

  17. 10km (RDAPS) 3km (WRF) 00 06 12 18 00 06 12 1km (WRF) UTC OBS OBS OBS OBS OBS FDDA : First guess LAPS : Analysis Numerical Experiment • Experimental Design Control Run (CNT): Conventional Data • Experimental Run (EXP): • Conventional Data + sounding • Period: • 00UTC 30 June – 00UTC 02 July 2006 • Integration Cycle

  18. Numerical Experiment Geochang Namwon Haenam Gosan Control run With soundings

  19. KEOPPhase II • Objectives : • Carry out Intensive observation of high-impact weather • Improve the predictability of High-Impact Weather system • Collaborate with international observing program • Development of the Targeted Observing System and it’s application

  20. Nationwide Super Network METRI/KMA 20 page

  21. Summary • Automatic Weather Station Network (13km*13km, one minute) and Weather radar(10 stations) operating by KMA can be used for measuring the high-impact severe weather system. • Produced high resolution temporal and spatial data(KEOP) are used for research and operation of the monitoring, analysis and prediction of severe weather phenomena(typhoon, fronts…) • KEOP has been concentrated on the understanding of dynamical structure and evolution of high-impact weather systems and enhance the understanding of the land-atmosphere interaction and physics of cloud & precipitation. • In order to improve operational forecast through increased model accuracy and reliability, enhancement observing network, development data assimmilation techniques are needed.

  22. Thank you for your attention !

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