Construction And Evaluation Of Multi-satellite Shortwave Radiation Product

Solar radiation is the main energy source of the earth, it has important influence on the energy balance, gas exchange, energy of the gas system of land surface hydrological process and climate around the formation. Surface shortwave radiation as an important branch of solar radiation, to study the changes of time and space, not only helps to understand the changes of regional climate, optical thickness can also indirectly atmospheric composition and changes in the region, atmospheric aerosol retrieval and analysis of the changes, and air condition analysis of pollutants. The ground wave radiation as a land surface model is the important driving data,improved suface shortwave radiation data and effective product quality, can reduce the atmospheric forcing data uncertainty, further improve the simulation accuracy of land surface model.In this paper, the ground of domestic and International Shortwave Radiation acquisition methods are investigated and analyzed. The calculation model of DISORT using the atmospheric radiative transfer, FY-2 geostationary meteorological satellite data, the atmospheric input data as the inversion of surface shortwave radiation, and several sets of application to short wave radiation data widely compares variational analysis; the method to improve the accuracy of fusion site observation satellite surface shortwave radiation products using multigrid; making the surface shortwave long time sequence radiation data sets, and evaluation and analysis; in the CMA high resolution land surface data assimilation system, business operation of the National Meteorological Information Center (CLDAS) surface shortwave radiation data method used was improved CMA, and its application to high resolution land surface data assimilation system (CMA High Resolution Land Data Assimilation System (HRCLDAS).The conclusions of this study are as follows:(1) Different versions of surface shortwave radiation data products comparative assessment, compared to FY-2E two sets of satellite derived surface shortwave radiation products SWDN-1.0 and SWDN-2.0, under the effect of SWDN-2.0 is better than SWDN-1.0, two sets of data products are the root mean square error and the average deviation is too large for the phenomenon. Compared to the ERA-Interim reanalysis data, FY-2E satellite derived surface shortwave radiation products high simulation precision, lower than that of the CERES satellite product SYNldeg, but the FY-2E satellite derived surface shortwave radiation products can show high temporal and spatial resolution, radiation changes more details.(2) Application of Multigrid variational analysis method, based on FY-2G satellite derived surface shortwave radiation products as the background, the fusion site surface shortwave radiation data using the Hybrid model to obtain the better effect, after fusion, can effectively improve the satellite retrieval precision of product surface shortwave radiation.(3) Surface shortwave radiation long time series data set production, ozone,atmospheric reanalysis data using a plurality of FY-2 geostationary meteorological satellite visible data and ERA-Interim precipitation and ground pressure data making 2006-2015 surface shortwave radiation data set, the data set can be well distributed in our country surface shortwave radiation and time space.(4) The experiment is improved, and the new FY-2G calibration coefficient is used to retrieve the short wave radiation. The new elevation angle correction can effectively reduce the systematic deviation of the satellite ground wave energy.