气候变化领域集成服务门户(CCPortal): Climatology and dynamics of the link between dry intrusions and cold fronts during winter. Part I: global climatology

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DOI	10.1007/s00382-019-04745-w
	Climatology and dynamics of the link between dry intrusions and cold fronts during winter. Part I: global climatology
	Catto J.L.; Raveh-Rubin S.
发表日期	2019
ISSN	0930-7575
起始页码	1873
结束页码	1892
卷号	53 期号:2020-03-04
英文摘要	Cold fronts are a primary feature of the day-to-day variability of weather in the midlatitudes, and feature in conceptual extratropical cyclone models alongside the dry intrusion airstream. Here the climatological frequency and spatial distribution of the co-occurrence of these two features are quantified, and the differences in cold front characteristics (intensity, size, and precipitation) when a dry intrusion is present or not are calculated. Fronts are objectively identified in the ECMWF ERA-Interim dataset for the winter seasons in each hemisphere and split into three sub-types: central fronts (within a cyclone area); trailing fronts (outwith the cyclone area but connected to a central front); and isolated fronts (not connected to a cyclone). These are then associated with dry intrusions identified using Lagrangian trajectory analysis. Trailing fronts are most likely to be associated with a DI in both hemispheres, and this occurs more frequently in the western parts of the major storm track regions. Isolated fronts are linked to DIs more frequently on the eastern ends of the storm tracks, and in the subtropics. All front types, when co-occurring with a DI, are stronger in terms of their temperature gradient, are much larger in area, and typically have higher average precipitation. Therefore, climatologically the link with DIs increases the impact of cold fronts. There are some differences in the statistics of the precipitation for trailing and isolated fronts that are further investigated in Part II of this study from the front-centred perspective. © 2019, The Author(s).
英文关键词	Atmospheric fronts; Climatology; Dry intrusions; Extratropical cyclones; Reanalysis; Trajectories
语种	英语
scopus关键词	atmospheric front; climatology; cold front; dry season; extratropical cyclone; global climate; storm track; trajectory
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146114
作者单位	College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom; Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel
推荐引用方式 GB/T 7714	Catto J.L.,Raveh-Rubin S.. Climatology and dynamics of the link between dry intrusions and cold fronts during winter. Part I: global climatology[J],2019,53(2020-03-04).
APA	Catto J.L.,&Raveh-Rubin S..(2019).Climatology and dynamics of the link between dry intrusions and cold fronts during winter. Part I: global climatology.Climate Dynamics,53(2020-03-04).
MLA	Catto J.L.,et al."Climatology and dynamics of the link between dry intrusions and cold fronts during winter. Part I: global climatology".Climate Dynamics 53.2020-03-04(2019).