DOI: 10.1007/s00382-017-3620-2
Scopus记录号: 2-s2.0-85016024367
论文题名: European temperature responses to blocking and ridge regional patterns
作者: Sousa P.M. ; Trigo R.M. ; Barriopedro D. ; Soares P.M.M. ; Santos J.A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-01-02 起始页码: 457
结束页码: 477
语种: 英语
英文关键词: Blocking
; Europe
; Extremes
; Ridges
; Synoptic meteorology
; Temperature
Scopus关键词: advection
; climatology
; extreme event
; summer
; synoptic meteorology
; temperature anomaly
; temperature effect
; winter
; Europe
英文摘要: Blocking occurrence and its impacts on European temperature have been studied in the last decade. However, most previous studies on blocking impacts have focused on winter only, disregarding its fingerprint in summer and differences with other synoptic patterns that also trigger temperature extremes. In this work, we provide a clear distinction between high-latitude blocking and sub-tropical ridges occurring in three sectors of the Euro-Atlantic region, describing their climatology and consequent impacts on European temperature during both winter and summer. Winter blocks (ridges) are generally associated to colder (warmer) than average conditions over large regions of Europe, in some areas with anomalies larger than 5 °C, particularly for the patterns occurring in the Atlantic and Central European sectors. During summer, there is a more regional response characterized by above average temperature for both blocking and ridge patterns, especially those occurring in continental areas, although negative temperature anomalies persist in southernmost areas during blocking. An objective analysis of the different forcing mechanisms associated to each considered weather regime has been performed, quantifying the importance of the following processes in causing the temperature anomalies: horizontal advection, vertical advection and diabatic heating. While during winter advection processes tend to be more relevant to explain temperature responses, in summer radiative heating under enhanced insolation plays a crucial role for both blocking and ridges. Finally, the changes in the distributions of seasonal temperature and in the frequencies of extreme temperature indices were also examined for specific areas of Europe. Winter blocking and ridge patterns are key drivers in the occurrence of regional cold and warm extreme temperatures, respectively. In summer, they are associated with substantial changes in the frequency of extremely warm days, but with different signatures in southern Europe. We conclude that there has been some misusage of the traditional blocking definition in the attribution of extreme events. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109519
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Lisboa, 1749-016, Portugal; Departamento de Física de la Tierra II, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, Spain; Instituto de Geociencias (IGEO), CSIC-UCM, Madrid, Spain; Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, Universidade de Trás-os-Montes e Alto Douro, UTAD, Vila Real, Portugal
Recommended Citation:
Sousa P.M.,Trigo R.M.,Barriopedro D.,et al. European temperature responses to blocking and ridge regional patterns[J]. Climate Dynamics,2018-01-01,50(2018-01-02)