위성자료가 기상청 전지구 통합 분석 예측 시스템에 미치는 효과
The Impact of Satellite Observations on the UM-4DVar Analysis and Prediction System at KMA
1
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
UK Met Office Unified Model (UM) is a grid model applicable for both global and regional model configurations. The Met Office has developed a 4D-Var data assimilation system, which was implemented in the global forecast system on 5 October 2004. In an effort to improve its Numerical Weather Prediction (NWP) system, Korea Meteorological Administration (KMA) has adopted the UM system since 2008. The aim of this study is to provide the basic information on the effects of satellite data assimilation on UM performance by conducting global satellite data denial experiments. Advanced Tiros Operational Vertical Sounder (ATOVS), Infrared Atmospheric Sounding Interferometer (IASI), Special Sensor Microwave Imager Sounder (SSMIS) data, Global Positioning System Radio Occultation (GPSRO) data, Air Craft (CRAFT) data, Atmospheric Infrared Sounder (AIRS) data were assimilated in the UM global system. The contributions of assimilation of each kind of satellite data to improvements in UM performance were evaluated using analysis data of basic variables;geopotential height at 500 hPa, wind speed and temperature at 850 hPa and mean sea level pressure. The statistical verification using Root Mean Square Error (RMSE) showed that most of the satellite data have positive impacts on UM global analysis and forecasts.
Abstract
UK Met Office Unified Model (UM) is a grid model applicable for both global and regional model configurations. The Met Office has developed a 4D-Var data assimilation system, which was implemented in the global forecast system on 5 October 2004. In an effort to improve its Numerical Weather Prediction (NWP) system, Korea Meteorological Administration (KMA) has adopted the UM system since 2008. The aim of this study is to provide the basic information on the effects of satellite data assimilation on UM performance by conducting global satellite data denial experiments. Advanced Tiros Operational Vertical Sounder (ATOVS), Infrared Atmospheric Sounding Interferometer (IASI), Special Sensor Microwave Imager Sounder (SSMIS) data, Global Positioning System Radio Occultation (GPSRO) data, Air Craft (CRAFT) data, Atmospheric Infrared Sounder (AIRS) data were assimilated in the UM global system. The contributions of assimilation of each kind of satellite data to improvements in UM performance were evaluated using analysis data of basic variables;geopotential height at 500 hPa, wind speed and temperature at 850 hPa and mean sea level pressure. The statistical verification using Root Mean Square Error (RMSE) showed that most of the satellite data have positive impacts on UM global analysis and forecasts.
참고문헌 (21)
- 박옥란, "해남 윈드프로파일러와 오토존데 자료를 이용한 관측시스템 연구", 한국기상학회지, 41(1), pp.57~71 (2005), 한국기상학회
- 이미선, "기상청 지역예보시스 템에서 자료동화과정의 개선", 한국기상학회, 12, pp.148~151 (2002)
- 장동언, "단시간 수치 예보를 위한 ATOVS 산출 온도 자료의 활용", 한국기상학회지, 41(4), pp.599~613 (2005), 한국기상학회
- QuickSCAT 해상풍 자료동화 기법 개발, 수치예보과 기술노트, "황승언", 35~, pp.2006-02 (2006)
- Andersson, E, "Use of cloud-cleared radiances in three", four-dimensional variational data assimilation, 1994, pp.120, 627~653
- Cucurull. L., "Assimilation of Global Positioning System Radio Occultation Observations into NCEP's Global Data Assimilation System", Mon. Wea. Rev, 135, pp.3174~3193 (2006)
- Cucurull. L., "Assessing the impact of simulated COSMIC GPS Radio Occultation data on weather analysis over the Antarctic: A cast study", Mon. Wea. Rev, 134, pp.3283~3296 (2006)
- Cusack, S., "The Empirically Adjusted Cloud Fraction modification to the cloud scheme", Met Office internal note, ~ (2002)
- Derber, J., "The use of TOVS cloudcleared radiances in the NCEP SSI analysis system", Mon. Wea. Rev, 126, pp.2287~2299 (1998)
- S.H. Derbyshire, "Sensitivity of moist convection to environmental humidity", Q. J. R. Met. Soc, 130, pp.3055~3080 (2004)
- Edwards, J.M., "The radiation code", UM documentation paper, No. 23, ~ (2004)
- Eyre, J.R., "Assimilation of TOVS radiances through on dimensional variational analysis", Q. J. R. Meteorol. Soc, 119, pp.1427~1463 (1993)
- Hilton, F, "Selection of IASI channels for user in numerical weather prediction", Q. J. R. Meteorol. Soc, 133, pp.1977~1991 (2009)
- 이미선, "Preliminary Tests of First Guess at Appropriate Time (FGAT) with WRF 3DVAR and WRF Model", 한국기상학회지, 41(4), pp.495~505 (2005), 한국기상학회
- Lock, A.P., "A new boundary layer mixing scheme. Part I: Scheme description and single-column model tests", Mon. Weather Rev, 128, pp.3187~3199 (2000)
- Met Office, "Unified Model User Guide", pp.243~ (2004)
- Pangaud, T., "Assimilation of AIRS radiances affected by mid-to low-level clouds", Mon. Wea. Rev, 137, pp.4276~4292 (2009)
- Tracton, M.S, "The impact of satellite soundings on the National Meteorological Center's analysis and forecast system-The Data Systems Test results", Mon. Wea. Rev, 108, pp.543~586 (1980)
- Webster, S., "Improvements to the representation of orography in the Met Office Unified Model", Q. J. R. Meteorol. Soc, 129, pp.1989~2010 (2003)
- Wilks, D., "Statistical Methods in the Atmospheric Sciences: An Introduction", pp.467~ (1995), Academic Press
- Wilson, D.R, "A microphysically based precipitation scheme for the UK Meteorological Office Unified Model", Q. J. R. Meteorol. Soc, 125, pp.1607~1636 (1999)