Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-9815-2017 |
Global and regional estimates of warm cloud droplet number concentration based on 13 years of AQUA-MODIS observations | |
Bennartz, Ralf1,2; Rausch, John1 | |
2017-08-22 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We present and evaluate a climatology of cloud droplet number concentration (CDNC) based on 13 years of Aqua-MODIS observations. The climatology provides monthly mean 1 x 1 degrees CDNC values plus associated uncertainties over the global ice-free oceans. All values are incloud values, i.e. the reported CDNC value will be valid for the cloudy part of the grid box. Here, we provide an overview of how the climatology was generated and assess and quantify potential systematic error sources including effects of broken clouds, and remaining artefacts caused by the retrieval process or related to observation geometry. Retrievals and evaluations were performed at the scale of initial MODIS observations (in contrast to some earlier climatologies, which were created based on already gridded data). This allowed us to implement additional screening criteria, so that observations inconsistent with key assumptions made in the CDNC retrieval could be rejected. Application of these additional screening criteria led to significant changes in the annual cycle of CDNC in terms of both its phase and magnitude. After an optimal screening was established a final CDNC climatology was generated. Resulting CDNC uncertainties are reported as monthly-mean standard deviations of CDNC over each 1 x 1 degrees grid box. These uncertainties are of the order of 30% in the stratocumulus regions and 60 to 80% elsewhere. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408098800002 |
WOS关键词 | BOUNDARY-LAYER CLOUDS ; LIQUID WATER PATH ; EFFECTIVE RADIUS ; STRATOCUMULUS CLOUDS ; RADIATIVE PROPERTIES ; OPTICAL-THICKNESS ; CONVECTIVE CLOUDS ; SATELLITE DATA ; RETRIEVALS ; AEROSOLS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/30927 |
专题 | 地球科学 |
作者单位 | 1.Vanderbilt Univ, Earth & Environm Sci Dept, Nashville, TN 37240 USA; 2.Univ Wisconsin, Ctr Space Sci & Engn, 1225 W Dayton St, Madison, WI 53706 USA |
推荐引用方式 GB/T 7714 | Bennartz, Ralf,Rausch, John. Global and regional estimates of warm cloud droplet number concentration based on 13 years of AQUA-MODIS observations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(16). |
APA | Bennartz, Ralf,&Rausch, John.(2017).Global and regional estimates of warm cloud droplet number concentration based on 13 years of AQUA-MODIS observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(16). |
MLA | Bennartz, Ralf,et al."Global and regional estimates of warm cloud droplet number concentration based on 13 years of AQUA-MODIS observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.16(2017). |
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