A Preliminary Study on the Heterogeneous Chemical Processes on the Surface of Dust Aerosol and Its Effect on Climate

Abstract

In this paper, we set up a heterogeneous chemical model which includes dust emission and connected it to an advanced meso‐scale meteorological—atmospheric chemical model system. A lot of cases were simulated by this model system to study the heterogeneous chemical process of dust aerosol and its climate effect. The results show that the heterogeneous reaction will reduce the concentration of SO2 and O3 but increase sulfate concentration. In some areas, it can decrease the NO2 concentration, but it can also increase it in other areas. The change of annual average sulfate is 2.6mg/m2. The maximum values of radiative forcing caused by heterogeneous reaction are −0.24,−1.0,−2.0,−0.6W/m2 respectively in January, April, July, and October. The annual average radiative forcing is −0.033W/m2. The maximum temperature variation in January, April, July, October are −0.16,−0.35,−0.5,−0.48K respectively and the annual temperature variation in whole domain is –0.021K. The heterogeneous process also has evident effect on precipitation.

Preliminary Simulation Research of Direct Radiative Forcing of Mineral Dust Aerosol Over East Asia Region

“…simulation of transfer and distribution [12∼15] , estimation of dust emission [16] , source E-mail: wujian@ynu.edu.cn analysis [17,18] , distribution feature and dust weather case study [19∼21] , radiative property [22] , climate effect [23,24] etc., and the observation and forecast system was built especially for dust weather in the northern China. In recent years, some researchers simulated its radiative forcing in East Asia with radiation transfer model [25] and studied the heterogeneous chemical processes on the dust surface and their effect on climate [26] . Yet research on mineral dust aerosol radiative effect and its climate response is still insufficient, and it is important to have a full understanding of the physical factors affecting East Asia climate change and for improvement of climate model tools.…”

Emissions and Concentration Distributions of Black Carbon Aerosol in East Asia during the Springtime

“…While in East Asia, especially in Mainland China, estimation of BC emissions is at its preliminary stage. The research on the original sources and tempo-spatial variations of BC as well as its climate effect has little been done [7,8] in the region. The "Asian Brown Clouds" found during the INDOEX (Indian Ocean Experiment) field experiment has drawn extensive attentions, and this finding considerably promoted the observation and theoretical study of BC.…”