Consistency of Tropospheric Water Vapor between Reanalyses and Himawari-8/AHI Measurements over East Asia  

作　　者：Di DI Jun LI Yunheng XUE Min MIN Bo LI Zhenglong LI 

机构地区：[1]Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science and Technology,Nanjing 210044,China [2]Key Laboratory for Aerosol-Cloud-Precipitation,China Meteorological Administration,School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China [3]FYSIC,National Satellite Meteorological Center,China Meteorological Administration,Beijing 100081,China [4]Chengdu University of Information Science and Technology,Chengdu 610225,China [5]School of Atmospheric Sciences and Guangdong Province Key laboratory for Climate Change and Natural Disaster Studies,Sun Yat-sen University and Southern Laboratory of Ocean Science and Engineering,Zhuhai 519082,China [6]Cooperative Institute for Meteorological Satellite Studies,University of Wisconsin–Madison,Madison WI 53706,Wisconsin,USA [7]Wuxi University,Wuxi 214105,China

出　　处：《Advances in Atmospheric Sciences》2024年第1期19-38,共20页大气科学进展（英文版）

基　　金：partly supported by the National Natural Science Foundation of China(Grant Nos.41975020 and 41975031)(Jun LI)。

摘　　要：High spatiotemporal resolution radiances from the advanced imagers onboard the new generation of geostationary weather satellites provide a unique opportunity to evaluate the abilities of various reanalysis datasets to depict multilayer tropospheric water vapor(WV),thereby enhancing our understanding of the deficiencies of WV in reanalysis datasets.Based on daily measurements from the Advanced Himawari Imager(AHI)onboard the Himawari-8 satellite in 2016,the bias features of multilayer WV from six reanalysis datasets over East Asia are thoroughly evaluated.The assessments show that wet biases exist in the upper troposphere in all six reanalysis datasets;in particular,these biases are much larger in summer.Overall,we find better depictions of WV in the middle troposphere than in the upper troposphere.The accuracy of WV in the ERA5 dataset is the highest,in terms of the bias magnitude,dispersion,and pattern similarity.The characteristics of the WV bias over the Tibetan Plateau are significantly different from those over other parts of East Asia.In addition,the reanalysis datasets all capture the shift of the subtropical high very well,with ERA5 performing better overall.

关 键 词：AHI reanalysis dataset multilayer water vapor assessment radiative transfer model 

分 类 号：P73[天文地球—海洋科学]