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Assimilation of the AMSU-A radiances using the CESM (v2.1.0) and the DART (v9.11.13)/RTTOV (v12.3)

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dc.contributor.author노영찬-
dc.contributor.authorChoi, Yonghan-
dc.contributor.author송효종-
dc.contributor.authorKevin Raeder-
dc.contributor.authorKim, Joo-Hong-
dc.contributor.author권영채-
dc.date.accessioned2023-12-06T16:38:36Z-
dc.date.available2023-12-06T16:38:36Z-
dc.date.issued2023-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/14914-
dc.description.abstractTo improve the initial condition (“analysis”) for numerical weather prediction, we attempt to assimilate observations from the Advanced Microwave Sounding Unit-A (AMSU-A) on board the low-earth-orbiting satellites. The data assimilation system, used in this study, consists of the Data Assimilation Research Testbed (DART) and the Community Earth System Model as the global forecast model. Based on the ensemble Kalman filter scheme, DART supports the radiative transfer model that is used to simulate the satellite radiances from the model state. To make the AMSU-A data available to be assimilated in DART, preprocessing modules are developed, which consist of quality control, spatial thinning, and bias correction processes. In the quality control, two sub-processes are included: outlier test and channel selection depending on the cloud condition and surface type. The bias correction process is divided into scan-bias correction and air-mass-bias correction. As input data used in DART, the observation errors are also estimated for the AMSU-A channels. In the trial experiments, a positive analysis impact is obtained by assimilating the AMSU-A observations on top of the DART data assimilation system that already makes use of the conventional measurements. In particular, the analysis errors are significantly reduced in the whole troposphere and lower stratosphere over the Northern Hemisphere. Overall, this study demonstrates a positive impact on the analysis when the AMSU-A observations are assimilated in the DART assimilation system.-
dc.languageEnglish-
dc.subject.classification해당사항없음-
dc.titleAssimilation of the AMSU-A radiances using the CESM (v2.1.0) and the DART (v9.11.13)/RTTOV (v12.3)-
dc.title.alternative마이크로파 위성 관측자료 및 전지구 기후모델을 이용한 자료동화 전처리 시스템 개발-
dc.typeArticle-
dc.identifier.bibliographicCitation노영찬, et al. 2023. "Assimilation of the AMSU-A radiances using the CESM (v2.1.0) and the DART (v9.11.13)/RTTOV (v12.3)". <em>GEOSCIENTIFIC MODEL DEVELOPMENT</em>, 16(18): 5365-5382.-
dc.citation.titleGEOSCIENTIFIC MODEL DEVELOPMENT-
dc.citation.volume16-
dc.citation.number18-
dc.identifier.doi10.5194/gmd-16-5365-2023-
dc.citation.startPage5365-
dc.citation.endPage5382-
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2021:5.446-
dc.identifier.localId2023-0150-
Appears in Collections  
2023-2023, Development and Application of the Earth System Model-based Korea Polar Prediction System (KPOPS-Earth) for the Arctic and Midlatitude High-impact Weather Events (23-23) / Kim, Joo-Hong (PE23010)
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