Investigation of Aerosol Radiation and Mixing Effects on Regional Climate over Southeast Asia with Satellite Retrievals

In regard to this significant topic, the impacts of climate change, radiative forcing of anthropogenicaerosols, natural drivers and aerosol-cloud interactions are discussed by the IPCC AR5. In particular, theman-made components of aerosols are increasing with industry growth. Since different aerosol types exhibitdifferent absorption and scattering properties which can affect the solar incoming and outgoing radiance, theimpacts on radiative forcing at the surface and the top of atmosphere will lead to changes of radiativebudget, rainfall pattern and global climate. The previous studies indicate that it’s necessary to consideraerosol parameters in atmospheric and climate Models to retrieve more reasonable and accurate results.However, the impacts of aerosol forcing are quite complicated and the estimation is sufficiently largeuncertainty at present. That is why provide more accurate aerosol retrievals is one important part of thisresearch. The aerosols will mix with the ambient aerosol and change its optical property easily andfrequently during the pathway of long-range transport. Mixtures of aerosols do not only lead the retrievalerrors but also induce the uncertainty of radiation energy estimation in atmospheric and climate models. Asa result, it’s essential to provide proper aerosol optical properties, especially under the mixing aerosolscircumstances. The preliminary results of the aerosol discrimination and the aerosol mixing effect are shownon the previous phase of this research. Accordingly, the main aim of this study is to figure out the differenceof aerosol optical properties after mixing procedure and the changes of aerosol radiative forcing, includingthe development of models for aerosol types, optical properties and air quality monitoring with satelliteobservations and ground based measurements in Southeast Asia. During the first year, the model of aerosoltype discrimination method will be optimized, as well as the model of three type included (dust, soot andsulfate) to retrieve more accuracy aerosol properties which can be applied a wide world of air qualitymonitor (PM2.5). Then the radiative forcing of aerosols and mixtures will be characterized in temporal andspatial distributions over South and East Asia. In the last year, the results of first two years will be integratedto investigate the issues related to aerosol effects (radiative forcing) on the regional precipitation andtemperature changes.