Analytical studies of the cloud droplet spectral dispersion influence on the first indirect aerosol effect

作者：Xie Xiaoning^*; Liu Xiaodong

来源：Advances in Atmospheric Sciences, 2013, 30(5): 1313-1319.

DOI：10.1007/s00376-012-2141-5

• spectral dispersion
• cloud radiative forcing
• the first indirect aerosol effect

Atmospheric aerosols (acting as cloud condensation nuclei) can enhance the cloud droplet number concentration and reduce the cloud droplet size, and in turn affect the cloud optical depth, as well as the cloud albedo, and thereby exert a radiative influence on climate (the first indirect aerosol effect). In this paper, based on various relationships between cloud droplet spectral dispersion (E >) and cloud droplet number concentration (N (c)), we analytically derive the corresponding expressions of the cloud radiative forcing induced by changes in the cloud droplet number concentration. Further quantitative evaluation indicates that the cloud radiative forcing induced by aerosols for the different E >-N (c) relationships varies from -29.1% to 25.2%, compared to the case without considering spectral dispersion (E > = 0). Our results suggest that an accu

• 出版日期2013-9
• 单位西安交通大学; 黄土与第四纪地质国家重点实验室; 中国科学院地球环境研究所