Grid-cell Aerosol Direct Shortwave Radiative Forcing Calculated Using the SBDART Model with MODIS and AERONET Observations：An Application in Winter and Summer in Eastern China

• Published in: Advances in atmospheric sciences Vol. 34; no. 8; pp. 952 - 964
• Main Authors: Fu, Yunfei, Zhu, Jiachen, Yang, Yuanjian, Yuan, Renmin, Liu, Guosheng, Xian, Tao, Liu, Peng
• Format: Journal Article
• Language: English
• Published: Heidelberg Science Press 01.08.2017; Springer Nature B.V; Anhui Academy for Environmental Science Research, Hefei 230071, China; School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, Florida FL 32306-4520, USA%School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; Key Laboratory of Atmospheric Sciences and Satellite Remote Sensing of Anhui Province,Anhui Institute of Meteorological Sciences, Hefei 230031, China%School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China%School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
• Subjects: Aerosol optical depth; Aerosol optical properties; Aerosols; Airborne particulates; Albedo; Albedo (solar); Amplitudes; Annual variations; ART模型; Atmosphere; Atmospheric Sciences; Climatological means; Climatology; Data processing; Depth; Earth and Environmental Science; Earth Sciences; Geophysics/Geodesy; Interannual variations; Loads (forces); Mathematical models; Meteorology; Methods; MODIS; Monsoons; Optical analysis; Optical properties; Original Paper; Properties; Radiative forcing; Radiative transfer; Relative humidity; Scale (ratio); Scattering; Secondary aerosols; Spatial distribution; Summer; Temperature; Temperature effects; Winter; 中国东部地区; 应用程序; 气溶胶光学厚度; 直接辐射强迫; 网格单元; 计算网格; China; AERONET; SBDART模式; aerosol direct radiative forcing; SBDART model; MODIS; 气溶胶直接辐射强迫
• ISSN: 0256-1530; 1861-9533
• DOI: 10.1007/s00376-017-6226-z

Taking winter and summer in eastern China as an example application, a grid-cell method of aerosol direct radiative forcing（ADRF） calculation is examined using the Santa Barbara DISORT Atmospheric Radiative Transfer（SBDART） model with inputs from MODIS and AERONET observations and reanalysis data. Results show that there are significant seasonal and regional differences in climatological mean aerosol optical parameters and ADRF. Higher aerosol optical depth（AOD）occurs in summer and two prominent high aerosol loading centers are observed. Higher single scattering albedo（SSA） in summer is likely associated with the weak absorbing secondary aerosols. SSA is higher in North China during summer but higher in South China during winter. Aerosols induce negative forcing at the top of the atmosphere（TOA） and surface during both winter and summer, which may be responsible for the decrease in temperature and the increase in relative humidity.Values of ADRF at the surface are four times stronger than those at the TOA. Both AOD and ADRF present strong interannual variations; however, their amplitudes are larger in summer. Moreover, patterns and trends of ADRF do not always correspond well to those of AOD. Differences in the spatial distributions of ADRF between strong and weak monsoon years are captured effectively. Generally, the present results justify that to calculate grid-cell ADRF at a large scale using the SBDART model with observational aerosol optical properties and reanalysis data is an effective approach.