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

The present study evaluates spatial and temporal characteristics of the Fengyun-3B (FY-3B)’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 2011–2019. In terms of climatological distribution patterns and interannual standard deviation, FY-3B OLR are quite consistent with NOAA OLR, with annual and seasonal pattern correlation coefficients all exceeding 0.93. There are some discrepancies in the OLR magnitude between FY-3B and NOAA, especially for the OLR climatology; the climatological OLR from FY-3B are systematically larger than those from NOAA over the whole study region. In 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-3B OLR exhibits a stronger relationship to precipitation over land. Moreover, FY-3B OLR exhibits better responses to the precipitation anomalies over India during the extreme El Niño and La Niña events. These results suggest that the FY-3B OLR dataset is of high quality and worthy of further global application.