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Original Research Papers

The effects of black carbon and sulphate aerosols in China regions on East Asia monsoons

Authors:

Yu Liu ,

Chinese Academy of Meteorological Sciences, CN
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Jiaren Sun,

South China Institute of Environmental Sciences, Ministry of Environmental Protection, CN
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Bai Yang

Environmental Sciences Division, Oak Ridge National Laboratory, US
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Abstract

In this paper, we examine the direct effects of sulphate and black carbon (BC) aerosols in China on East Asia monsoons and its precipitation processes by using the Community Atmosphere Model (CAM) 3.0 model. It is demonstrated that sulphate and BC aerosols in China both have the effects to weaken East Asia monsoons in both summer and winter seasons. However, they certainly differ from each other in affecting vertical structures of temperature and atmospheric circulations. Their differences are expected because of their distinct optical properties, that is, scattering versus absorbing. Even for a single type of aerosol, its effects on temperature structures and atmospheric circulations are largely season-dependent. Applications ofT-test on our results indicate that forcing from BC aerosols over China is relatively weak and limited. It is also evident from our results that the effects of synthetic aerosols (sulphate and BC together) on monsoons are not simply a linear summation between these two types of aerosols. Instead, they are determined by their integrated optical properties. Synthetic aerosols to a large degree resemble effects of sulphate aerosols. This implies a likely scattering property for the integration of BC and sulphate aerosols in China.

How to Cite: Liu, Y., Sun, J. and Yang, B., 2009. The effects of black carbon and sulphate aerosols in China regions on East Asia monsoons. Tellus B: Chemical and Physical Meteorology, 61(4), pp.642–656. DOI: http://doi.org/10.1111/j.1600-0889.2009.00427.x
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  Published on 01 Jan 2009
 Accepted on 9 Apr 2009            Submitted on 19 Jul 2008

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