Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-11135-2018 |
On the role of aerosols, humidity, and vertical wind shear in the transition of shallow-to-deep convection at the Green Ocean Amazon 2014/5 site | |
Chakraborty, Sudip; Schiro, Kathleen A.; Fu, Rong; Neelin, J. David | |
2018-08-10 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:15页码:11135-11148 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The preconditioning of the atmosphere for a shallow-to-deep convective transition during the dry-to-wet season transition period (August-November) is investigated using Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) GoAmazon2014/5 campaign data from March 2014 to November 2015 in Manacapuru, Brazil. In comparison to conditions observed prior to shallow convection, anomalously high humidity in the free troposphere and boundary layer is observed prior to a shallow-to-deep convection transition. An entraining plume model, which captures this leading dependence on lower tropospheric moisture, is employed to study indirect thermodynamic effects associated with vertical wind shear (VWS) and cloud condensation nuclei (CCN) concentration on preconvective conditions. The shallow-to-deep convective transition primarily depends on humidity, especially that from the free troposphere, which tends to increase plume buoyancy. Conditions preceding deep convection are associated with high relative humidity, and low-to-moderate CCN concentration (less than the 67th percentile, 1274 cm 3). VWS, however, shows little relation to moisture and plume buoyancy. Buoyancy estimates suggest that the latent heat release due to freezing is important to deep convective growth under all conditions analyzed, consistent with potential pathways for aerosol effects, even in the presence of a strong entrainment. Shallow-only convective growth, however, shows an association with a strong (weak) low (deep) level VWS and with higher CCN concentration. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441329900001 |
WOS关键词 | COLUMN WATER-VAPOR ; SOUTHERN AMAZON ; BOUNDARY-LAYER ; DIURNAL CYCLE ; PRECIPITATION ; SYSTEMS ; CLOUDS ; SATELLITE ; RADAR ; LAND |
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/30532 |
专题 | 地球科学 |
作者单位 | Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA |
推荐引用方式 GB/T 7714 | Chakraborty, Sudip,Schiro, Kathleen A.,Fu, Rong,et al. On the role of aerosols, humidity, and vertical wind shear in the transition of shallow-to-deep convection at the Green Ocean Amazon 2014/5 site[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(15):11135-11148. |
APA | Chakraborty, Sudip,Schiro, Kathleen A.,Fu, Rong,&Neelin, J. David.(2018).On the role of aerosols, humidity, and vertical wind shear in the transition of shallow-to-deep convection at the Green Ocean Amazon 2014/5 site.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(15),11135-11148. |
MLA | Chakraborty, Sudip,et al."On the role of aerosols, humidity, and vertical wind shear in the transition of shallow-to-deep convection at the Green Ocean Amazon 2014/5 site".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.15(2018):11135-11148. |
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