| DOI: | 10.3354/cr01444
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| Scopus记录号: | 2-s2.0-85020449766
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| 论文题名: | Synoptic climatology of tornadoes in the northeast USA |
| 作者: | Benjamin A.E.; Leathers D.J.
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| 刊名: | Climate Research
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| ISSN: | 0936577X
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| 出版年: | 2017
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| 卷: | 72, 期:1 | | 起始页码: | 19
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| 结束页码: | 27
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| 语种: | 英语
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| 英文关键词: | Climatology
; Northeast USA
; Severe weather
; Tornado
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| Scopus关键词: | advection
; climate forcing
; climatology
; low pressure system
; potential temperature
; severe weather
; spatiotemporal analysis
; storm damage
; synoptic meteorology
; tornado
; United States
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| 英文摘要: | A tornado climatology is constructed for the northeast USA (hereafter, Northeast) for the period 1950-2014. This region is highly susceptible to tornado damage as it includes dense populations in several major cities. This study provides a general climatology of tornadoes in the Northeast by exploring the spatial and temporal characteristics of the region's tornadoes. Additionally, 86 days defined as active tornado days (5+ reports per day) are used to examine the synoptic patterns associated with Northeast tornado environments. Tornadoes in the Northeast were most frequently reported in the late spring and summer months (May to July), during the late afternoon and early evening hours, between 18:00 and 23:00 h UTC (14:00 and 19:00 h local sidereal time [LST]). Tornadoes were reported most frequently along the densely populated Interstate 95 corridor, which connects several of the largest cities in the USA. Approximately 79% of all Northeast tornadoes were given an Enhanced Fujita Scale intensity rating of ≤1. Composite synoptic maps indicate that Northeast tornado outbreaks are commonly associated with a 500 hPa trough and a surface low pressure system over the Great Lakes. Differential positive vorticity advection and warm advection contribute quasi-geostrophic forcing, modifying thermodynamic profiles making them favorable for convection. These lifting mechanisms and associated instability (represented by high equivalent potential temperature and an unstable lifted index), along with sufficient lower tropospheric wind shear, provide the ingredients necessary for severe convection. © Inter-Research 2017. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/116330
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| Appears in Collections: | 气候减缓与适应
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| Recommended Citation: | |
Benjamin A.E.,Leathers D.J.. Synoptic climatology of tornadoes in the northeast USA[J]. Climate Research,2017-01-01,72(1)
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