Quantifying Uncertainties in CERES/MODIS Downwelling Radiation Fluxes in the Global Tropical Oceans  

作　　者：Venugopal Thandlam Anna Rutgersson Hasibur Rahaman Mounika Yabaku Venkatramana Kaagita Venkatramana Reddy Sakirevupalli 

机构地区：[1]Department of Earth Sciences,Uppsala University,Uppsala,Sweden [2]The Center for Environment and Development Studies Research Forum(CEFO),Uppsala University,Uppsala,Sweden [3]Department of Meteorology and Oceanography,Andhra Pradesh,India [4]Centre of Natural Hazards and Disaster Science(CNDS),Uppsala University,Uppsala,Sweden [5]ESSO-Indian National Centre for Ocean Information Services(INCOIS),Hyderabad,India [6]Department of Computer Sciences,Uppsala University,Uppsala,Sweden [7]The Energy and Resources Institute,New Delhi,India [8]Department of Physics,Sri Venkateshwara University,Tirupati,India

出　　处：《Ocean-Land-Atmosphere Research》2023年第1期21-43,共23页海洋-陆地-大气研究（英文）

基　　金：We acknowledge the Department of Earth Sciences,Uppsala University,and the Swedish Research Council(VR)nr 2017-03988 for supporting this study.

摘　　要：The Clouds and the Earth's Radiant Energy System program,which uses the Moderate Resolution Imaging Spectroradiometer(CM),has been updated with the launch of new satellites and the availability of newly upgraded radiation data.The spatial and temporal variability of daily averaged synoptic 1-degree CM version 3(CMv3)(old)and version 4(CMv4)(new)downwelling shortwave(QS)and longwave radiation(QL)data in the global tropical oceans spanning 30°S-30°N from 2000 to 2017 is investigated.Daily in situ data from the Global Tropical Moored Buoy Array were used to validate the CM data from 2000 to 2015.When compared to CMv3,both QS and QL in CMv4 show significant improvements in bias,root-mean-square error,and standard deviations.Furthermore,a long-term trend analysis shows that QS has been increasing by 1 W m^(−2) per year in the Southern Hemisphere.In contrast,the Northern Hemisphere has a−0.7 W m^(−2) annual decreasing trend.QS and QL exhibit similar spatial trend patterns.However,in the Indian Ocean,Indo-Pacific warm pool region,and Southern Hemisphere,QL spatial patterns in CMv3 and CMv4 differ with an opposite trend(0.5 W m^(−2)).These annual trends in QS and QL could cause the sea surface temperature to change by−0.2 to 0.3℃per year in the tropical oceans.These results stress the importance of accurate radiative flux data,and CMv4 can be an alternative to reanalysis or other model-simulated data.

关 键 词：TREND TROPICAL GLOBAL 

分 类 号：P733[天文地球—物理海洋学]