Reprocessing 12-yr Microwave Humidity Sounder Historical Data of Fengyun-3 Satellites

• 作者: Yang GUO Fangli DOU Qiong WU Jieying HE Shengwei ZHANG Zhenzhan WANG Songyan GU Peng ZHANG
• 来源期刊: 气象学报（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: FENGYUN METEOROLOGICAL SATELLITE CLIMATE DATA RECORDS (CDR) REPROCESSING: METHODS, PRODUCTS, AND APPLICATIONS
• 页码范围: 261-270
• 页数: 10页
• 语种: 英文

摘要

Atmospheric water vapor is an essential climate variable (ECV) with extensive spatial and temporal variations. Mi- crowave humidity observations from meteorological satellites provide important information for climate system vari- ables, including atmospheric water vapor and precipitable water, and assimilation in numerical weather prediction (NWP) and reanalysis. As one of the payloads onboard China's second-generation polar-orbiting operational meteor- ological Fengyun-3 (FY-3) satellites, the Microwave Humidity Sounder (MWHS) has been continuously observing the global humidity since 2008. The reprocessing of historical FY-3 MWHS data is documented in detail in this study. After calibrating and correcting the data, the quality of the reprocessed dataset is evaluated and the improve- ment is shown in this study. The results suggest that MWHS observations bias is reduced to approximately 0.8 K, compared with METOP-A Microwave Humidity Sounder (MHS). The temporal variability of MWHS is highly cor- related with the instrument temperature. After reprocessing, the scene temperature dependency is mitigated for all 183 GHz channels, and the consistency and stability between FY-3A/B/C are also improved.