دورية أكاديمية
Assimilation of the AMSU-A radiances using the CESM (v2.1.0) and the DART (v9.11.13)–RTTOV (v12.3)
| العنوان: | 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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| المؤلفون: | Y.-C. Noh, Y. Choi, H.-J. Song, K. Raeder, J.-H. Kim, Y. Kwon |
| المصدر: | Geoscientific Model Development, Vol 16, Pp 5365-5382 (2023) |
| بيانات النشر: | Copernicus Publications, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Geology |
| مصطلحات موضوعية: | Geology, QE1-996.5 |
| الوصف: | To 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. Like 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. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1991-959X 1991-9603 |
| Relation: | https://gmd.copernicus.org/articles/16/5365/2023/gmd-16-5365-2023.pdf; https://doaj.org/toc/1991-959X; https://doaj.org/toc/1991-9603 |
| DOI: | 10.5194/gmd-16-5365-2023 |
| URL الوصول: | https://doaj.org/article/6d74f28c2cf14bc38e4d0f3aabcaa294 |
| رقم الأكسشن: | edsdoj.6d74f28c2cf14bc38e4d0f3aabcaa294 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 1991959X 19919603 |
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| DOI: | 10.5194/gmd-16-5365-2023 |