Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0217.1 |
Erroneous Attribution of Deep Convective Invigoration to Aerosol Concentration | |
Varble, Adam | |
2018-04-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:4页码:1351-1368 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Contiguous time-height cloud objects at the Department of Energy Atmospheric Radiation Measurement Southern Great Plains (SGP) site are matched with surface condensation nuclei (CN) concentrations and retrieved thermodynamic and kinematic vertical profiles for warm-cloud-base, cold-cloud-top systems in convectively unstable environments. Statistical analyses show that previously published conclusions that increasing CN concentrations cause a decrease in minimum cloud-top temperature (CTT) at the SGP site through the aerosol convective invigoration effect are unfounded. The CN-CTT relationship is statistically insignificant, while correlations between convective available potential energy (CAPE), level of neutral buoyancy (LNB), and CN concentration account for most of the change in the CN-CTT positive correlation. Removal of clouds with minimum CTTs > similar to 36 degrees C from the analysis eliminates the CN-CTT correlation. Composited dirty conditions at the SGP have similar to 1 degrees C-warmer low levels and similar to 1 degrees C-cooler upper levels than clean conditions. This correlation between aerosol concentrations and thermodynamic profiles may be caused by an increase in regional rainfall preceding deep convective conditions as CN concentration decreases. Increased rainfall can be expected to increase wet deposition of aerosols, cool low-level temperatures, and warm upper-level temperatures. The masking of a potential aerosol effect by such small thermodynamic changes implies that the strategy of analyzing subsets of aerosol data by binned meteorological factor values is not a valid method for discerning an aerosol effect in some situations. These findings highlight the need for more careful, detailed, and strategic observations to confidently isolate and quantify an aerosol deep convective invigoration effect. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430749000020 |
WOS关键词 | UNTANGLING MICROPHYSICAL IMPACTS ; SOUTHERN GREAT-PLAINS ; LONG-TERM ; CLOUD ; PRECIPITATION ; ATLANTIC ; DYNAMICS ; TROPICS ; SYSTEM ; RAIN |
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/29682 |
专题 | 地球科学 |
作者单位 | Univ Utah, Dept Atmospher Sci, Salt Lake City, UT 84112 USA |
推荐引用方式 GB/T 7714 | Varble, Adam. Erroneous Attribution of Deep Convective Invigoration to Aerosol Concentration[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(4):1351-1368. |
APA | Varble, Adam.(2018).Erroneous Attribution of Deep Convective Invigoration to Aerosol Concentration.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(4),1351-1368. |
MLA | Varble, Adam."Erroneous Attribution of Deep Convective Invigoration to Aerosol Concentration".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.4(2018):1351-1368. |
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