Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0122.1 |
Deep Convective Organization, Moisture Vertical Structure, and Convective Transition Using Deep-Inflow Mixing | |
Schiro, Kathleen A.1,2; Neelin, J. David1 | |
2019-04-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:4页码:965-987 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | It is an open question whether an integrated measure of buoyancy can yield a strong relation to precipitation across tropical land and ocean, across the seasonal and diurnal cycles, and for varying degrees of convective organization. Building on previous work, entraining plume buoyancy calculations reveal that differences in convective onset as a function of column water vapor (CWV) over land and ocean, as well as seasonally and diurnally over land, are largely due to variability in the contribution of lower-tropospheric humidity to the total column moisture. Over land, the relationship between deep convection and lower-free-tropospheric moisture is robust across all seasons and times of day, whereas the relation to boundary layer moisture is robust for the daytime only. Using S-band radar, these transition statistics are examined separately for mesoscale and smaller-scale convection. The probability of observing mesoscale convective systems sharply increases as a function of lower-free-tropospheric humidity. The consistency of this with buoyancy-based parameterization is examined for several mixing formulations. Mixing corresponding to deep inflow of environmental air into a plume that grows with height, which incorporates nearly equal weighting of boundary layer and free-tropospheric air, yields buoyancies consistent with the observed onset of deep convection across the seasonal and diurnal cycles in the Amazon. Furthermore, it provides relationships that are as strong or stronger for mesoscale-organized convection as for smaller-scale convection. |
英文关键词 | Deep convection Entrainment Mesoscale systems Convective-scale processes Humidity Hydrologic cycle |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462356700001 |
WOS关键词 | COLUMN WATER-VAPOR ; DIURNAL CYCLE ; PRECIPITATING CONVECTION ; TROPICAL CONVECTION ; CLOUD CLUSTERS ; SHALLOW ; MODEL ; SENSITIVITY ; ENTRAINMENT ; SIMULATION |
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/182163 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA |
推荐引用方式 GB/T 7714 | Schiro, Kathleen A.,Neelin, J. David. Deep Convective Organization, Moisture Vertical Structure, and Convective Transition Using Deep-Inflow Mixing[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(4):965-987. |
APA | Schiro, Kathleen A.,&Neelin, J. David.(2019).Deep Convective Organization, Moisture Vertical Structure, and Convective Transition Using Deep-Inflow Mixing.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(4),965-987. |
MLA | Schiro, Kathleen A.,et al."Deep Convective Organization, Moisture Vertical Structure, and Convective Transition Using Deep-Inflow Mixing".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.4(2019):965-987. |
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