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DOI | 10.5194/acp-18-7473-2018 |
Convective environment in pre-monsoon and monsoon conditions over the Indian subcontinent: the impact of surface forcing | |
Thomas, Lois1; Malap, Neelam1; Grabowski, Wojciech W.2,3; Dani, Kundan1; Prabha, Thara V.1 | |
2018-05-30 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:10页码:7473-7488 |
文章类型 | Article |
语种 | 英语 |
国家 | India; USA; Poland |
英文摘要 | Thermodynamic soundings for pre-monsoon and monsoon seasons from the Indian subcontinent are analysed to document differences between convective environments. The pre-monsoon environment features more variability for both near-surface moisture and free-tropospheric temperature and moisture profiles. As a result, the level of neutral buoyancy (LNB) and pseudo-adiabatic convective available potential energy (CAPE) vary more for the pre-monsoon environment. Pre-monsoon soundings also feature higher lifting condensation levels (LCLs). LCL heights are shown to depend on the availability of surface moisture, with low LCLs corresponding to high surface humidity, arguably because of the availability of soil moisture. A simple theoretical argument is developed and showed to mimic the observed relationship between LCLs and surface moisture. We argue that the key element is the partitioning of surface energy flux into its sensible and latent components, that is, the surface Bowen ratio, and the way the Bowen ratio affects surface buoyancy flux. We support our argument with observations of changes in the Bowen ratio and LCL height around the monsoon onset, and with idealized simulations of cloud fields driven by surface heat fluxes with different Bowen ratios. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433511900001 |
WOS关键词 | ATMOSPHERIC BOUNDARY-LAYER ; ASIAN SUMMER MONSOON ; UNTANGLING MICROPHYSICAL IMPACTS ; ENHANCEMENT EXPERIMENT CAIPEEX ; CLOUD AEROSOL INTERACTION ; DEEP CONVECTION ; SOIL-MOISTURE ; INTRASEASONAL VARIABILITY ; PRECIPITATION FEEDBACK ; TROPICAL CONVECTION |
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/27313 |
专题 | 地球科学 |
作者单位 | 1.Indian Inst Trop Meteorol, Pune, Maharashtra, India; 2.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 3.Univ Warsaw, Fac Phys, Inst Geophys, Warsaw, Poland |
推荐引用方式 GB/T 7714 | Thomas, Lois,Malap, Neelam,Grabowski, Wojciech W.,et al. Convective environment in pre-monsoon and monsoon conditions over the Indian subcontinent: the impact of surface forcing[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(10):7473-7488. |
APA | Thomas, Lois,Malap, Neelam,Grabowski, Wojciech W.,Dani, Kundan,&Prabha, Thara V..(2018).Convective environment in pre-monsoon and monsoon conditions over the Indian subcontinent: the impact of surface forcing.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(10),7473-7488. |
MLA | Thomas, Lois,et al."Convective environment in pre-monsoon and monsoon conditions over the Indian subcontinent: the impact of surface forcing".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.10(2018):7473-7488. |
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