DOI: 10.1038/ngeo2214
论文题名: Satellite-based estimate of global aerosol-cloud radiative forcing by marine warm clouds
作者: Chen Y.-C. ; Christensen M.W. ; Stephens G.L. ; Seinfeld J.H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 9 起始页码: 643
结束页码: 646
语种: 英语
英文摘要: Changes in aerosol concentrations affect cloud albedo and Earth's radiative balance. Aerosol radiative forcing from pre-industrial time to the present due to the effect of atmospheric aerosol levels on the micro- and macrophysics of clouds bears the largest uncertainty among external influences on climate change. Of all cloud forms, low-level marine clouds exert the largest impact on the planet's albedo. For example, a 6% increase in the albedo of global marine stratiform clouds could offset the warming that would result from a doubling of atmospheric CO 2 concentrations. Marine warm cloud properties are thought to depend on aerosol levels and large-scale dynamic or thermodynamic states. Here we present a comprehensive analysis of multiple measurements from the A-Train constellation of Earth-observing satellites, to quantify the radiative forcing exerted by aerosols interacting with marine clouds. Specifically, we analyse observations of co-located aerosols and clouds over the world's oceans for the period August 2006-April 2011, comprising over 7.3 million CloudSat single-layer marine warm cloud pixels. We find that thermodynamic conditions - that is, tropospheric stability and humidity in the free troposphere - and the state of precipitation act together to govern the cloud liquid water responses to the presence of aerosols and the strength of aerosol-cloud radiative forcing. © 2014 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106491
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: California Institute of Technology, Pasadena, CA 91125, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Colorado State University, Fort Collins, CO 80523, United States
Recommended Citation:
Chen Y.-C.,Christensen M.W.,Stephens G.L.,et al. Satellite-based estimate of global aerosol-cloud radiative forcing by marine warm clouds[J]. Nature Geoscience,2014-01-01,7(9)