Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078977 |
Extratropical Cyclone Precipitation Life Cycles: A Satellite-Based Analysis | |
Booth, James F.1,2,3; Naud, Catherine M.2,4; Jeyaratnam, Jeyavinoth1,3 | |
2018-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:16页码:8647-8654 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Although extratropical cyclones are the most common midlatitude storms, the relationship between their precipitation life cycle and dynamical strength life cycle has not been thoroughly analyzed. Given that thermodynamic heat exchanges associated with precipitation impact cyclone circulation, there is a need to understand the precipitation/dynamics relationship. Based on Integrated Multi-satellitE Retrievals for Global Precipitation MeasurementGPM precipitation and Lagrangian cyclone tracks, the precipitation maximum occurs prior to the dynamical strength maximum 70% of the time. The lag in timing is consistent with the difference in cyclone precipitable water vapor at the two peaks. Conditional subsetting of the cyclone composites shows that if the precipitable water vapor distribution is constrained to be equal throughout the composite life cycle, the precipitation peak occurs very near the time of the peak in cyclone dynamical strength. Thus, the boost in dynamical strength caused by latent heat associated with precipitation manifest itself with little to no time lag. Plain Language Summary Extratropical cyclones are the most common storms in the midlatitudes. These storms generate strong precipitation and winds. The heating within the troposphere that occurs during the formation of the cyclone''s precipitation can increase the cyclone''s circulation strength, which relates closely to the winds. This study analyzes the timing of the evolution of precipitation and cyclone strength using satellite observations of precipitation. The results show that the peak in precipitation usually occurs prior to the peak in circulation, and the cause is related to moisture availability. A separate analysis in which cyclones are selected in a manner that fixes the moisture availability at each time step throughout the life cycle indicates no lag between precipitation and circulation peaks. Thus, it seems likely that any boost in dynamical strength that is caused by the precipitation occurs with little to no lag in time. |
英文关键词 | Extratropical cCyclone Precipitation Satellite Life cCycle |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445612500085 |
WOS关键词 | ATLANTIC ; CLIMATE ; GCM |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/26532 |
专题 | 气候变化 |
作者单位 | 1.CUNY City Coll, Earth & Atmospher Sci, New York, NY 10031 USA; 2.NASA, GISS, New York, NY 10025 USA; 3.CUNY, Grad Ctr, Earth & Environm Sci Dept, New York, NY 10016 USA; 4.Columbia Univ, Appl Phys & Appl Math, New York, NY USA |
推荐引用方式 GB/T 7714 | Booth, James F.,Naud, Catherine M.,Jeyaratnam, Jeyavinoth. Extratropical Cyclone Precipitation Life Cycles: A Satellite-Based Analysis[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(16):8647-8654. |
APA | Booth, James F.,Naud, Catherine M.,&Jeyaratnam, Jeyavinoth.(2018).Extratropical Cyclone Precipitation Life Cycles: A Satellite-Based Analysis.GEOPHYSICAL RESEARCH LETTERS,45(16),8647-8654. |
MLA | Booth, James F.,et al."Extratropical Cyclone Precipitation Life Cycles: A Satellite-Based Analysis".GEOPHYSICAL RESEARCH LETTERS 45.16(2018):8647-8654. |
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