Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025969 |
Level of neutral buoyancy, deep convective outflow, and convective core: New perspectives based on 5 years of CloudSat data | |
Takahashi, Hanii1,2; Luo, Zhengzhao Johnny3; Stephens, Graeme L.1,4 | |
2017-03-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | This paper is the follow on to a previous publication by the authors, which investigated the relationship between the level of neutral buoyancy (LNB) determined from the ambient sounding and the actual outflow levels using mainly CloudSat observations. The goal of the current study is to provide a more complete characterization of LNB, deep convective outflow, and convective core, and the relationship among them, as well as the dependence on environmental parameters and convective system size. A proxy is introduced to estimate convective entrainment, namely, the difference between the LNB (based on the ambient sounding) and the actual outflow height. The principal findings are as follows: (1) Deep convection over the Warm Pool has larger entrainment rates and smaller convective cores than the counterpart over the two tropical land regions (Africa and Amazonia), lending observational support to a long-standing assumption in convection models concerning the negative relationship between the two parameters. (2) The differences in internal vertical structure of convection between the two tropical land regions and the Warm Pool suggest that deep convection over the two tropical land regions contains more intense cores. (3) Deep convective outflow occurs at a higher level when the midtroposphere is more humid and the convective system size is smaller. The convective system size dependence is postulated to be related to convective lifecycle, highlighting the importance of cloud life stage information in interpretation of snapshot measurements by satellite. Finally, implications of the study to global modeling are discussed. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398064200025 |
WOS关键词 | VERTICAL VELOCITY ; TROPICAL TROPOPAUSE ; CUMULONIMBUS ; STRATOSPHERE ; REFLECTIVITY ; TEMPERATURE ; EVOLUTION |
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/33630 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Los Angeles, Joint Nucl Reg Earth Syst Sci & Engn, Los Angeles, CA 90024 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA; 3.CUNY, NOAA CREST Inst, Dept Earth & Atmospher Sci, New York, NY USA; 4.Univ Reading, Dept Meteorol, Reading RG6 2AH, Berks, England |
推荐引用方式 GB/T 7714 | Takahashi, Hanii,Luo, Zhengzhao Johnny,Stephens, Graeme L.. Level of neutral buoyancy, deep convective outflow, and convective core: New perspectives based on 5 years of CloudSat data[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(5). |
APA | Takahashi, Hanii,Luo, Zhengzhao Johnny,&Stephens, Graeme L..(2017).Level of neutral buoyancy, deep convective outflow, and convective core: New perspectives based on 5 years of CloudSat data.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(5). |
MLA | Takahashi, Hanii,et al."Level of neutral buoyancy, deep convective outflow, and convective core: New perspectives based on 5 years of CloudSat data".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.5(2017). |
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