A numerical simulation of aerosols' direct effects on tropopause height

作者：Wu, Jian^*; Xu, Yanyan; Yang, Qian; Han, Zhiwei; Zhao, Deming; Tang, Jianping

来源：Theoretical and Applied Climatology, 2013, 112(3-4): 659-671.

DOI：10.1007/s00704-012-0760-5

• STRATOSPHERE-TROPOSPHERE EXCHANGE
• COMMUNITY CLIMATE MODEL
• TROPICAL TROPOPAUSE
• INTERANNUAL VARIABILITY
• NATIONAL CENTER
• VERSION-3 CAM3
• TOTAL OZONE
• ATMOSPHERE
• TRANSPORT
• CYCLE

The direct effects of sulfate aerosol, dust aerosol, carbonaceous aerosol, and total combined aerosols on the tropopause height are simulated with the Community Atmospheric Model version 3.1 (CAM3.1). A decrease of global mean tropopause height induced by sulfate, carbonaceous aerosol, and total combined aerosols is found, and a tropopause height increase is induced by dust aerosol. Sulfate aerosol decreases the tropospheric temperature and increases the stratospheric temperature. These effects cause a decrease in the height of the tropopause. In contrast, carbonaceous and total combined aerosols increase both the tropospheric and the stratospheric temperatures, and they also cause a decrease in the height of the tropopause. The changes in the tropopause height show highly statistically significant correlations with the changes in the tropospheric and stratospheric temperatures. The changes in the tropospheric and stratospheric temperatures are related to the changes in the radiative heat rate, cloud cover, and latent heat, but none of these factors absolutely dominate the temperature change.

• 出版日期2013-5
• 单位云南大学; 中国科学院大气物理研究所; 南京大学