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DOI | 10.1029/2018GL078880 |
Global Estimates of Changes in Shortwave Low-Cloud Albedo and Fluxes Due to Variations in Cloud Droplet Number Concentration Derived From CERES-MODIS Satellite Sensors | |
Painemal, David | |
2018-09-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:17页码:9288-9296 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Fifteen years of Aqua Clouds and the Earth's Radiant Energy Systems ( CERES) and MOderate resolution Imaging Spectroradiometer ( MODIS) observations are combined to derive nearly global maps of shortwave albedo ( A) and flux ( F) response to changes in cloud droplet number concentration ( Nd). Absolute ( Sa 1/4. A. Nd) and relative ( Sr 1/4. A. ln Nd o thorn) albedo susceptibilities are computed by exploiting the linear relationship between A and ln ( Nd) for shallow liquid clouds. Subtropical stratiform clouds over the eastern Pacific, eastern Atlantic, and off the coast of eastern Asia yield the highest Sr, followed by the extratropical oceans during their hemispheric summer. When Sr is cast in terms of F, the eastern Pacific clouds dominate Sr. Sa is mainly governed by Nd, with offshore clouds producing high Sa. While both Sa and Sr are advantageous for understanding radiative aspects of the aerosol indirect effect, Sr is more suitable for calculating changes in A and F due to the linearity of the A- ln ( Nd) relationship. Plain Language Summary The amount of solar radiation reflected back to space is strongly controlled by liquid clouds. These clouds are highly sensitive to changes in the environmental conditions due to both natural and anthropogenic factors. Atmospheric aerosols can regulate the cloud microstructure by modifying the number of droplets in the cloud. These changes can lead to an enhancement of the solar energy reflected by clouds. Here satellite data from two sensors are combined to quantify the amount of reflected solar radiation associated with changes in the cloud droplet number concentration. Results are shown globally, with an emphasis in the nonpolar oceanic regions, where liquids clouds tend to be more frequent. The results presented in this study can help shed light into the processes that modulate the cloud radiative response due to aerosol-cloud interactions. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445727500065 |
WOS关键词 | ANGULAR-DISTRIBUTION MODELS ; ENERGY SYSTEM INSTRUMENT ; STRATOCUMULUS CLOUDS ; TERRA SATELLITE ; METHODOLOGY ; RETRIEVALS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28615 |
专题 | 气候变化 |
作者单位 | NASA, Sci Syst & Applicat Inc, Langley Res Ctr, Hampton, VA 23665 USA |
推荐引用方式 GB/T 7714 | Painemal, David. Global Estimates of Changes in Shortwave Low-Cloud Albedo and Fluxes Due to Variations in Cloud Droplet Number Concentration Derived From CERES-MODIS Satellite Sensors[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(17):9288-9296. |
APA | Painemal, David.(2018).Global Estimates of Changes in Shortwave Low-Cloud Albedo and Fluxes Due to Variations in Cloud Droplet Number Concentration Derived From CERES-MODIS Satellite Sensors.GEOPHYSICAL RESEARCH LETTERS,45(17),9288-9296. |
MLA | Painemal, David."Global Estimates of Changes in Shortwave Low-Cloud Albedo and Fluxes Due to Variations in Cloud Droplet Number Concentration Derived From CERES-MODIS Satellite Sensors".GEOPHYSICAL RESEARCH LETTERS 45.17(2018):9288-9296. |
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