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DOI | 10.1175/JAS-D-18-0029.1 |
Sensitivity of Tropical Cyclone Intensification to Axisymmetric Heat Sources: The Role of Low-Level Heating and Cooling from Different Microphysical Processes | |
Paull, Georgina1,2; Menelaou, Konstantinos1; Yau, M. K.1 | |
2018-12-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:12页码:4229-4246 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Latent heat release from condensational heating has been recognized as one of the dominating energy sources of a tropical cyclone. Here we argue that other microphysical processes may also play an important role. From an analysis of a real-case simulation of Hurricane Katrina (2005), it was found that cooling from evaporation and melting of some frozen hydrometeors radially outside the eyewall region can have similar magnitudes as condensational heating. Based on this finding, idealized thermally forced experiments were performed. The specified heating and cooling functions mimic those found in the Hurricane Katrina run. The results indicated that the addition of cooling enhances the lower-level inward radial winds, which in turn increases the acceleration of the lower-level tangential winds through an enhanced transport of absolute vorticity. Sensitivity experiments on varying the structure of the cooling functions and the background state of the vortex demonstrate that the lower-level tangential wind acceleration is more sensitive to changes in the vertical structure and location of the cooling than the radial characteristics. In addition, the lower-level acceleration is sensitive to variations in the inertial and static stabilities rather than the vertical tangential wind shear of the initial vortex and its environment. |
英文关键词 | Dynamics Hurricanes Tropical cyclones Cloud microphysics |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451268900002 |
WOS关键词 | HURRICANE INTENSITY ; PART II ; SIMULATION ; EVOLUTION ; CONVECTION ; IMPACT ; CORE ; PREDICTION ; DYNAMICS ; EYEWALL |
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/29676 |
专题 | 地球科学 |
作者单位 | 1.McGill Univ, Dept Atmospher & Ocean Sci, Montreal, PQ, Canada; 2.Environm & Climate Change Canada, Air Qual Res Div, Dorval, PQ, Canada |
推荐引用方式 GB/T 7714 | Paull, Georgina,Menelaou, Konstantinos,Yau, M. K.. Sensitivity of Tropical Cyclone Intensification to Axisymmetric Heat Sources: The Role of Low-Level Heating and Cooling from Different Microphysical Processes[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(12):4229-4246. |
APA | Paull, Georgina,Menelaou, Konstantinos,&Yau, M. K..(2018).Sensitivity of Tropical Cyclone Intensification to Axisymmetric Heat Sources: The Role of Low-Level Heating and Cooling from Different Microphysical Processes.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(12),4229-4246. |
MLA | Paull, Georgina,et al."Sensitivity of Tropical Cyclone Intensification to Axisymmetric Heat Sources: The Role of Low-Level Heating and Cooling from Different Microphysical Processes".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.12(2018):4229-4246. |
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