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

Yu Liu; Jiaren Sun; Bai Yang

doi:10.1111/j.1600-0889.2009.00427.x

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

Tellus B: Chemical and Physical Meteorology

Volume 61 (2009): Issue 4

By: Yu Liu, Jiaren Sun and Bai Yang

Open Access

|Jan 2009

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.

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Articles in this issue

DOI: https://doi.org/10.1111/j.1600-0889.2009.00427.x | Journal eISSN: 1600-0889

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Language: English

Page range: 642 - 656

Submitted on: Jul 19, 2008

Accepted on: Apr 9, 2009

Published on: Jan 1, 2009

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2009 Yu Liu, Jiaren Sun, Bai Yang, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 61 (2009): Issue 4