MDPI remote sensing - publication data - Improving the Regional Precipitation Simulation Corrected by Satellite Observation Using Quantile Mapping

<b>Abstract</b>: <br>This study investigates how to use the gridded satellite datasets of observational precipitation to improve the performance of the climatological simulation by using the method of non-parametric quantile mapping (QM). The precipitation in Southeast Asia is simulated in 2001–2005 using the climate model of Weather Research and Forecasting (WRF). Two satellite datasets of observational precipitation, GSMaP and CHIRPS, are used for model training, simulation evaluation, and cross-validation. The evaluations of simulation and bias correction suggest that QM is able to perfectly correct the overall quantile distributions of the simulated precipitation, which has overestimation at most quantiles, especially for light and extreme precipitation. After the QM correction based on GSMaP (CHIRPS), the relative bias of the monthly average for all months is reduced from 39.3% to 4.1% (from 57.2% to 4.2%). The biases of spatial patterns are largely narrowed from 43.5% (59.4%) to 4.0% (2.5%) for annual-mean precipitation and from 43.5% (59.4%) to 4.0% (2.5%) for extreme precipitation. The results indicate that the QM correction based on the gridded satellite datasets outperforms the raw model output and greatly improves the estimates of the simulated precipitation.<br><b>Dataset description:</b>Name regulation: XXX05: 5km; XXX10: 10km; 01-12: 12 months; OBS: observation; WRF: WRF simulation; QMC: quantile mapping correction.<br>Folder "grid_data_OBS": daily grid data of observation;<br>Folder "grid_data_WRF": daily grid data of WRF simulation;<br>Folder "grid_data_QMC": daily grid data of QM correction;Folder "Figure 2 - cdf_OBS_WRF_QMC": data for results in Figure 2;<br>Folder "Figure 3 - statistics_mon_QMC": data for results in Figure 3;Folder "Figure 4 - annual precipitation": data for results in Figure 4;<br>Folder "Figure 5 - extreme precipitation": data for results in Figure 5.