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인천 공항 주변 고해상도 항공기 추적 정보 기반의바람 관측자료 생산 및 품질 검증

Retrieval and Quality Assessment of Atmospheric Winds from the Aircraft-Based Observation Near Incheon International Airport, Korea

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주제분류대기과학

초록

We analyzed the high-resolution wind data of Aircraft-Based Observation from theMode-Selective Enhanced Surveillance (Mode-S EHS) data in Korea. For assessment of itsquality, the Mode-S wind data was compared with the ECMWF ReAnalysis 5 (ERA5) reanalysisand Aircraft Meteorological Data Relay (AMDAR) data for more than 3-months from7 May 2021 to 24 August 2021 near Incheon International Airport, Korea. Considering that theAMDAR reports are not provided by all commercial aircraft, total number of the Mode-S derivedwind data with a second sampling rate was about twice larger than that of availableAMDAR wind data. After the quality control procedures by removing erroneous samples, it wasfound that the root mean square errors (RMSEs) of the Mode-S retrieved winds are similar tothat from the AMDAR winds. In particular, between 550 and 650 hPa levels, RMSE of theMode-S (AMDAR) zonal wind against ERA5 data was about 2.3 m s–1 (1.9 m s–1), and thoseincreased to 3.3 m s–1 (2.4 m s–1) in 200~500 hPa levels. A similar trend was found in themeridional wind, but a distinct positive mean bias of 2.16 m s–1 was observed between 875and 1,000 hPa levels. Winds retrieved from the Mode-S also showed a good agreement directlywith AMDAR data. As the Mode-S provides a large amount of data with a reliable quality,it can be useful for both data assimilation in the numerical weather prediction model and situationalawareness of wind and turbulence for aviation safety in Korea.

Abstract

We analyzed the high-resolution wind data of Aircraft-Based Observation from theMode-Selective Enhanced Surveillance (Mode-S EHS) data in Korea. For assessment of itsquality, the Mode-S wind data was compared with the ECMWF ReAnalysis 5 (ERA5) reanalysisand Aircraft Meteorological Data Relay (AMDAR) data for more than 3-months from7 May 2021 to 24 August 2021 near Incheon International Airport, Korea. Considering that theAMDAR reports are not provided by all commercial aircraft, total number of the Mode-S derivedwind data with a second sampling rate was about twice larger than that of availableAMDAR wind data. After the quality control procedures by removing erroneous samples, it wasfound that the root mean square errors (RMSEs) of the Mode-S retrieved winds are similar tothat from the AMDAR winds. In particular, between 550 and 650 hPa levels, RMSE of theMode-S (AMDAR) zonal wind against ERA5 data was about 2.3 m s–1 (1.9 m s–1), and thoseincreased to 3.3 m s–1 (2.4 m s–1) in 200~500 hPa levels. A similar trend was found in themeridional wind, but a distinct positive mean bias of 2.16 m s–1 was observed between 875and 1,000 hPa levels. Winds retrieved from the Mode-S also showed a good agreement directlywith AMDAR data. As the Mode-S provides a large amount of data with a reliable quality,it can be useful for both data assimilation in the numerical weather prediction model and situationalawareness of wind and turbulence for aviation safety in Korea.

참고문헌 (33)

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