A Preliminary Study on the Heterogeneous Chemical Processes on the Surface of Dust Aerosol and Its Effect on Climate
A Preliminary Study on the Heterogeneous Chemical Processes on the Surface of Dust Aerosol and Its Effect on Climate
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沙尘气溶胶表面非均相化学过程及其对气候影响的初步研究
DOI：
10.1002/cjg2.509
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Wei
中科院分区：
文献类型：
--
作者：
Hongnian Liu;Wei
在本文中，我们建立了包含粉尘排放的非均质化学模型，并将其与先进的中尺度气象-大气化学模型系统连接起来。该模型系统模拟了大量实例，研究沙尘气溶胶的非均质化学过程及其气候效应。结果表明，非均相反应会降低SO2和O3的浓度，但会增加硫酸盐的浓度。在某些地区，它可以降低NO2浓度，但在其他地区也可以增加NO2浓度。硫酸盐年均变化为2.6mg/m2。非均质反应引起的辐射强迫最大值在1月、4月、7月和10月分别为-0.24、-1.0、-2.0、-0.6W/m2。年平均辐射强迫为-0.033W/m2。 1月、4月、7月、10月最大气温变化分别为-0.16、-0.35、-0.5、-0.48K，全域年气温变化为-0.021K。非均质过程对降水也有明显影响。
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.