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DOI | 10.1175/JCLI-D-19-0137.1 |
Spatiotemporal Characteristics and Large-Scale Environments of Mesoscale Convective Systems East of the Rocky Mountains | |
Feng, Zhe1; Houze, Robert A., Jr.1,2; Leung, L. Ruby1; Song, Fengfei1; Hardin, Joseph C.1; Wang, Jingyu1; Gustafson, William I., Jr.1; Homeyer, Cameron R.3 | |
2019-11-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:21页码:7303-7328 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The spatiotemporal variability and three-dimensional structures of mesoscale convective systems (MCSs) east of the U.S. Rocky Mountains and their large-scale environments are characterized across all seasons using 13 years of high-resolution radar and satellite observations. Long-lived and intense MCSs account for over 50% of warm season precipitation in the Great Plains and over 40% of cold season precipitation in the southeast. The Great Plains has the strongest MCS seasonal cycle peaking in May-June, whereas in the U.S. southeast MCSs occur year-round. Distinctly different large-scale environments across the seasons have significant impacts on the structure of MCSs. Spring and fall MCSs commonly initiate under strong baroclinic forcing and favorable thermodynamic environments. MCS genesis frequently occurs in the Great Plains near sunset, although convection is not always surface based. Spring MCSs feature both large and deep convection, with a large stratiform rain area and high volume of rainfall. In contrast, summer MCSs often initiate under weak baroclinic forcing, featuring a high pressure ridge with weak low-level convergence acting on the warm, humid air associated with the low-level jet. MCS genesis concentrates east of the Rocky Mountain Front Range and near the southeast coast in the afternoon. The strongest MCS diurnal cycle amplitude extends from the foothills of the Rocky Mountains to the Great Plains. Summer MCSs have the largest and deepest convective features, the smallest stratiform rain area, and the lowest rainfall volume. Last, winter MCSs are characterized by the strongest baroclinic forcing and the largest MCS precipitation features over the southeast. Implications of the findings for climate modeling are discussed. |
英文关键词 | Deep convection Precipitation Convective storms Mesoscale systems Storm environments Radars Radar observations |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000487934900002 |
WOS关键词 | WARM-SEASON PRECIPITATION ; CLIMATE MODELS ; UNITED-STATES ; GREAT-PLAINS ; SQUALL LINE ; RESOLUTION ; RAINFALL ; EVENTS ; CLASSIFICATION ; ORGANIZATION |
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/188097 |
专题 | 气候变化 |
作者单位 | 1.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 3.Univ Oklahoma, Sch Meteorol, Norman, OK 73019 USA |
推荐引用方式 GB/T 7714 | Feng, Zhe,Houze, Robert A., Jr.,Leung, L. Ruby,et al. Spatiotemporal Characteristics and Large-Scale Environments of Mesoscale Convective Systems East of the Rocky Mountains[J]. JOURNAL OF CLIMATE,2019,32(21):7303-7328. |
APA | Feng, Zhe.,Houze, Robert A., Jr..,Leung, L. Ruby.,Song, Fengfei.,Hardin, Joseph C..,...&Homeyer, Cameron R..(2019).Spatiotemporal Characteristics and Large-Scale Environments of Mesoscale Convective Systems East of the Rocky Mountains.JOURNAL OF CLIMATE,32(21),7303-7328. |
MLA | Feng, Zhe,et al."Spatiotemporal Characteristics and Large-Scale Environments of Mesoscale Convective Systems East of the Rocky Mountains".JOURNAL OF CLIMATE 32.21(2019):7303-7328. |
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