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Evaluation of the Madden–Julian Oscillation in fengyun-3b Polar-Orbiting Satellite Reprocessed OLR Data

Journal of Meteorological Research 2022年第6期36卷 931-946页

作者： Hainan GONG Wanchun ZHANG Ling SUN Zizhen DONG Peng ZHANG Lin WANG Wen CHEN Renguang WU Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190 National Satellite Meteorological Centre China Meteorological AdministrationBeijing 100081 School of Earth Sciences Yunnan UniversityKunming 650500 School of Earth Sciences Zhejiang UniversityHangzhou 310058

The present study compares the spatial and temporal characteristics of the Madden-Julian Oscillation(MJO)in fengyun-3b(FY-3b)polar-orbiting satellite reprocessed outgoing longwave radiation(OLR)data and NOAA OLR data during *** spatial distributions of climatological mean and intraseasonal standard deviation of FY-3b OLR during boreal winter(November-April)and boreal summer(May-October)are highly consistent with those of NOAA *** FY-3b and NOAA OLRs display highly consistent features in the wavenumber-frequency spectra,the occurrence frequency of MJO active days,the eastward propagation of MJO along the equator,and the interannual variability of MJO according to diagnoses using the all-season multivariate EOF *** results indicate that the FY-3b OLR produced by the polar-orbiting satellites is of high quality and worthy of global application.

关键词： fengyun-3b outgoing longwave radiation Madden–Julian Oscillation multivariate empirical orthogonal function data evaluation

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Spatiotemporal Variations of Microwave Land Surface Emissivity(MLSE)over China Derived from Four-Year Recalibrated fengyun 3b MWRI Data

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Advances in Atmospheric Sciences 2022年第9期39卷 1536-1560页

作者： Rui LI Jiheng HU Shengli WU Peng ZHANG Husi LETU Yu WANG Xuewen WANG Yuyun FU Renjun ZHOU Ling SUN School of Earth and Space Sciences Comparative Planetary Excellence Innovation CenterChinese Academy of SciencesUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026China National Satellite Meteorological Center of China Meteorological Administration Beijing 100044China State Key Laboratory of Remote Sensing Science The Aerospace Information Research InstituteChinese Academy of Sciences(CAS)Beijing 100101China Green Earth Research Inc. SlingerlandsNew York 12259USA

Microwave Land Surface Emissivity(MLSE)over China under both clear and cloudy sky conditions was retrieved using measurements of recalibrated microwave brightness temperatures(Tbs)from fengyun-3b Microwave Radiation Imager(FY-3b MWRI),combined with cloud properties derived from Himawari-8 Advanced Himawari Imager(AHI)*** contributions from cloud particles and atmospheric gases to the upwelling Tbs at the top of atmosphere were calculated and removed in radiative *** MLSEs at horizontal polarizations at 10.65,18.7,and 36.5 GHz during 7 July 2015 to 30 June 2019 over China showed high values in the southeast vegetated area and low values in the northwest barren,or sparsely vegetated,*** maximum values were found in the belt area of the Qinling-Taihang Mountains and the eastern edge of the Qinghai-Tibet Plateau,which is highly consistent with MLSEs derived from *** demonstrates that the measurements of FY-3b MWRI Tbs,including its calibration and validation,are reliable,and the retrieval algorithm developed in this study works *** variations of MLSE in China are mainly driven by the combined effects of vegetation,rainfall,and snow *** tropical and southern forest regions,the seasonal variation of MLSE is small due to the enhancement from vegetation and the suppression from *** the boreal area,snow causes a significant decrease of MLSE at 36.5 GHz in ***,the MLSE at lower frequencies experiences less *** the desert region in Xinjiang,increases of MLSEs at all frequencies are observed with increasing snow cover.

关键词： satellite remote sensing microwave surface emissivity fengyun-3b MWRI Himawari-8 AHI

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Evaluation of FY-3b Reprocessed OLR Data in the Asian–Australian Monsoon Region during 2011–2019:Comparison with NOAA OLR

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Journal of Meteorological Research 2021年第6期35卷 964-974页

作者： Lin LIU Wanchun ZHANG Wen CHEN Renguang WU Lin WANG State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081 National Satellite Meteorological Center China Meteorological AdministrationBeijing 100081 Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190 School of Earth Sciences Zhejiang UniversityHangzhou 310027

The present study evaluates spatial and temporal characteristics of the fengyun-3 b(FY-3 b)’s outgoing longwave radiation(OLR)data based on NOAA OLR data and the GPCP(Global Precipitation Climatology Project)precipitation data over the Asian-Australian region during *** terms of climatological distribution patterns and interannual standard deviation,FY-3 bOLR are quite consistent with NOAA OLR,with annual and seasonal pattern correlation coefficients all exceeding *** are some discrepancies in the OLR magnitude between FY-3 b and NOAA,especially for the OLR climatology;the climatological OLR from FY-3 b are systematically larger than those from NOAA over the whole study *** addition,examination of the temporal correlation coefficients between OLR and precipitation over the Asian-Australian monsoon(AAM)region reveals that both of the OLR datasets have captured the widespread negative correlation with precipitation,and FY-3 bOLR exhibits a stronger relationship to precipitation over ***,FY-3 bOLR exhibits better responses to the precipitation anomalies over India during the extreme El Nino and La Nina *** results suggest that the FY-3 b OLR dataset is of high quality and worthy of further global application.

关键词： fengyun-3b outgoing longwave radiation precipitation Asian–Australian monsoon data evaluation

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