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DOI | 10.1029/2019GL086620 |
Upright Convection in Extratropical Cyclones: A Survey Using Ground-Based Radar Data Over the United States | |
Jeyaratnam, Jeyavinoth1,2; Booth, James F.1,2,3; Naud, Catherine M.3,4; Luo, Z. Johnny1,2; Homeyer, Cameron R.5 | |
2020-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Upright convection can impact extratropical cyclone (ETC) precipitation and dynamics differently than isentropic ascent, but how often it occurs and how much it contributes to total precipitation within an ETC have not been systematically documented in previous literature. Herein, convection in ETCs is analyzed using ground-based radar observations over the Eastern United States. Convection occupies 1%-5% of the precipitating region and constitutes 1%-15% of total cyclone precipitation. Furthermore, the location of convective activity occurs preferentially in the warm sector early in a cyclone's life cycle, and then as the storm evolves, more convection occurs along and behind the cold front. The precipitation rates in regions with convection are more likely to be stronger than those in other precipitating regions of the cyclone. However, the cyclones with the largest area-average precipitation rates include only a small contribution from convection. Plain Language Summary This research is motivated by the potential influence of convection on extratropical cyclone circulation. We utilize a newly derived dataset of upright convection and a cyclone-tracking framework to quantify convective activity in extratropical cyclones over the United States, east of the Rocky Mountains. We find that upright convection only occupies a small portion of the precipitating region, and the relative contribution to total precipitation has relatively small variability as the cyclone evolves. We find that the location of convective activity occurs preferentially in the warm sector early in a cyclone's life cycle, and as the storm evolves, more convection occurs along and behind the cold front. We find that precipitation rates in regions with convection are more likely to be stronger than those in other precipitating regions of the cyclone. However, the cyclones with the largest area-average precipitation rates include only a small contribution from convection. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529120100049 |
WOS关键词 | PRECIPITATION ; STORM ; SENSITIVITY ; MESOSCALE ; MODEL ; IMPACTS ; WARM |
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/279684 |
专题 | 气候变化 |
作者单位 | 1.CUNY, Grad Ctr, Earth & Environm Sci Dept, New York, NY 10017 USA; 2.CUNY, Dept Earth & Atmospher Sci, City Coll New York, New York, NY 10021 USA; 3.NASA, Goddard Inst Space Studies, New York, NY 10025 USA; 4.Columbia Univ, Appl Phys & Appl Math Dept, New York, NY USA; 5.Univ Oklahoma, Sch Meteorol, Norman, OK 73019 USA |
推荐引用方式 GB/T 7714 | Jeyaratnam, Jeyavinoth,Booth, James F.,Naud, Catherine M.,et al. Upright Convection in Extratropical Cyclones: A Survey Using Ground-Based Radar Data Over the United States[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(4). |
APA | Jeyaratnam, Jeyavinoth,Booth, James F.,Naud, Catherine M.,Luo, Z. Johnny,&Homeyer, Cameron R..(2020).Upright Convection in Extratropical Cyclones: A Survey Using Ground-Based Radar Data Over the United States.GEOPHYSICAL RESEARCH LETTERS,47(4). |
MLA | Jeyaratnam, Jeyavinoth,et al."Upright Convection in Extratropical Cyclones: A Survey Using Ground-Based Radar Data Over the United States".GEOPHYSICAL RESEARCH LETTERS 47.4(2020). |
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