Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0406.1 |
Low Cloud Cover Sensitivity to Biomass-Burning Aerosols and Meteorology over the Southeast Atlantic | |
Adebiyi, Adeyemi A.; Zuidema, Paquita | |
2018-06-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:11页码:4329-4346 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Shortwave-absorbing aerosols seasonally cover and interact with an expansive low-level cloud deck over the southeast Atlantic. Daily anomalies of the MODIS low cloud fraction, fine-mode aerosol optical depth (AOD(f)), and six ERA-Interim meteorological parameters (lower-tropospheric stability, 800-hPa subsidence, 600-hPa specific humidity, 1000- and 800-hPa horizontal temperature advection, and 1000-hPa geopotential height) are constructed spanning July-October (2001-12). A standardized multiple linear regression, whereby the change in the low cloud fraction to each component's variability is normalized by one standard deviation, facilitates comparison between the different variables. Most cloud-meteorology relationships follow expected behavior for stratocumulus clouds. Of interest is the low cloud-subsidence relationship, whereby increasing subsidence increases low cloud cover between 10 degrees and 20 degrees S but decreases it elsewhere. Increases in AOD(f) increase cloudiness everywhere, independent of other meteorological predictors. The cloud-AOD(f) effect is partially compensated by accompanying increases in the midtropospheric moisture, which is associated with decreases in low cloud cover. This suggests that the free-tropospheric moisture affects the low cloud deck primarily through longwave radiation rather than mixing. The low cloud cover is also more sensitive to aerosol when the vertical distance between the cloud and aerosol layer is relatively small, which is more likely to occur early in the biomass burning season and farther offshore. A parallel statistical analysis that does not include AOD(f) finds altered relationships between the low cloud cover changes and meteorology that can be understood through the aerosol cross-correlations with the meteorological predictors. For example, the low cloud-stability relationship appears stronger if aerosols are not explicitly included. |
英文关键词 | Cloud cover Large-scale motions Synoptic-scale processes Aerosols Aerosol-cloud interaction |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432380400009 |
WOS关键词 | LOWER-TROPOSPHERIC STABILITY ; SEA-SURFACE TEMPERATURE ; STRATOCUMULUS CLOUDS ; ABSORBING AEROSOLS ; BOUNDARY-LAYER ; ERA-INTERIM ; ATMOSPHERIC CIRCULATION ; MARINE STRATOCUMULUS ; RADIATIVE PROPERTIES ; STRATIFORM CLOUDS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/20919 |
专题 | 气候变化 |
作者单位 | Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA |
推荐引用方式 GB/T 7714 | Adebiyi, Adeyemi A.,Zuidema, Paquita. Low Cloud Cover Sensitivity to Biomass-Burning Aerosols and Meteorology over the Southeast Atlantic[J]. JOURNAL OF CLIMATE,2018,31(11):4329-4346. |
APA | Adebiyi, Adeyemi A.,&Zuidema, Paquita.(2018).Low Cloud Cover Sensitivity to Biomass-Burning Aerosols and Meteorology over the Southeast Atlantic.JOURNAL OF CLIMATE,31(11),4329-4346. |
MLA | Adebiyi, Adeyemi A.,et al."Low Cloud Cover Sensitivity to Biomass-Burning Aerosols and Meteorology over the Southeast Atlantic".JOURNAL OF CLIMATE 31.11(2018):4329-4346. |
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