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DOI | 10.1007/s00382-018-4115-5 |
An examination of extratropical cyclone response to changes in baroclinicity and temperature in an idealized environment | |
Tierney, Gregory1,4; Posselt, Derek J.2; Booth, James F.3 | |
2018-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:3829-3846 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The dynamics and precipitation in extratropical cyclones (ETCs) are known to be sensitive to changes in the cyclone environment, with increases in bulk water vapor and baroclinicity both leading to increases in storm strength and precipitation. Studies that demonstrate this sensitivity have commonly varied either the cyclone moisture or baroclinicity, but seldom both. In a changing climate, in which the near-surface equator to pole temperature gradient may weaken while the bulk water vapor content of the atmosphere increases, it is important to understand the relative response of ETC strength and precipitation to changes in both factors simultaneously. In this study, idealized simulations of ETC development are conducted in a moist environment using a model with a full suite of moist physics parameterizations. The bulk temperature (and water vapor content) and baroclinicity are systematically varied one at a time, then simultaneously, and the effect of these variations on the storm strength and precipitation is assessed. ETC intensity exhibits the well-documented response to changes in baroclinicity, with stronger ETCs forming in higher baroclinicity environments. However, increasing water vapor content produces non-monotonic changes in storm strength, in which storm intensity first increases with increasing environmental water vapor, then decreases above a threshold value. Examination of the storm geographic extent indicates cyclone size also decreases above a threshold value of bulk environmental temperature (and water vapor). Decrease in storm size is concomitant with an increase in the convective fraction of precipitation and a shift in the vertical distribution of latent heating. The results indicate the existence of at least two regimes for ETC development, each of which exhibit significantly different distributions of PV due to differences in timing and location of convective heating. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447366100038 |
WOS关键词 | LATENT-HEAT RELEASE ; NUMERICAL-SIMULATION ; ARCTIC AMPLIFICATION ; MIDLATITUDE WEATHER ; DIABATIC PROCESSES ; MESOSCALE MODEL ; WARMER CLIMATE ; CYCLOGENESIS ; PRECIPITATION ; DYNAMICS |
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/35204 |
专题 | 气候变化 |
作者单位 | 1.Univ Michigan, Ann Arbor, MI 48109 USA; 2.CALTECH, Jet Prop Lab, M-S 233-304,4800 Oak Grove Dr, Pasadena, CA 91109 USA; 3.CUNY City Coll, 160 Convent Ave,Marshak Bldg,Room 927, New York, NY 10031 USA; 4.NC State Univ, Dept Marine Earth & Atmospher Sci, 2800 Faucette Dr,Rm 1136 Jordan Hall, Raleigh, NC 27695 USA |
推荐引用方式 GB/T 7714 | Tierney, Gregory,Posselt, Derek J.,Booth, James F.. An examination of extratropical cyclone response to changes in baroclinicity and temperature in an idealized environment[J]. CLIMATE DYNAMICS,2018,51:3829-3846. |
APA | Tierney, Gregory,Posselt, Derek J.,&Booth, James F..(2018).An examination of extratropical cyclone response to changes in baroclinicity and temperature in an idealized environment.CLIMATE DYNAMICS,51,3829-3846. |
MLA | Tierney, Gregory,et al."An examination of extratropical cyclone response to changes in baroclinicity and temperature in an idealized environment".CLIMATE DYNAMICS 51(2018):3829-3846. |
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