GSTDTAP  > 气候变化
DOI10.1007/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
ISSN0930-7575
EISSN1432-0894
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
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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
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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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