DOI: 10.1002/jgrd.50246
论文题名: Polar lows over the nordic and labrador seas: Synoptic circulation patterns and associations with north atlantic-europe wintertime weather regimes
作者: Mallet P.-E. ; Claud C. ; Cassou C. ; Noer G. ; Kodera K.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 6 起始页码: 2455
结束页码: 2472
语种: 英语
Scopus关键词: Atmospheric pressure
; Storms
; Geo-potential heights
; Near-surface winds
; North Atlantic oscillations
; Potential vorticity
; Probability of occurrence
; Sea surface temperature (SST)
; Synoptic circulations
; Temporal variation
; Atmospheric temperature
; air temperature
; cyclone
; data set
; geopotential
; marine atmosphere
; North Atlantic Oscillation
; polar region
; sea surface temperature
; stratosphere
; synoptic meteorology
; temporal variation
; vorticity
; westerly
; winter
; Arctic Ocean
; Atlantic Ocean
; Labrador Sea
; Norwegian Sea
; Scandinavia
英文摘要: [1] Polar Lows (PLs) are intense meso-cyclones forming in winter at high latitudes over open water. Using several datasets of PLs over the North Atlantic, the synoptic environment conducive to their development is determined. The 500 hPa geopotential height, the difference between the sea surface temperature and the 500 hPa air temperature, the near-surface wind and air temperature, and the 300 hPa potential vorticity present significant anomaly patterns over large areas centered over PL genesis zones, suggesting cold air outbreaks and stratospheric intrusions. PLs develop within a northerly flow in the Norwegian Sea, a northeasterly flow in the Barents Sea and a westerly flow in the Labrador Sea. PLs form after a certain build-up, the outbreak day being marked by strong winds and PV intensification. The relationship between PLs and daily weather regimes over North Atlantic-Europe is then investigated. Regimes have a typical lifetime of 8-10 days, similar to the large-scale anomalies associated with PLs. Over the Norwegian and Barents seas from 1999 to 2011, 37% of PLs are observed during the Atlantic Ridge regime (AR) and 28% in the negative phase regime of the North Atlantic Oscillation (NAO), whereas PL probability of occurrence is reduced by half for the positive phase of NAO and the Scandinavian blocking (SB) regimes. Over the Labrador Sea, most PLs occur during NAO+ while they are almost absent during NAO. Demonstrating the temporal variation of key factors based on an updated dataset and relating PLs to weather regimes will introduce novel and important elements in PL forecasting methodology. © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63854
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Laboratoire de Météorologie Dynamique/IPSL, CNRS, Ecole Polytechnique, Palaiseau, France; CERFACS/CNRS, Climate Modeling and Global Change Team, Toulouse, France; Norwegian Meteorological Institute, Tromsoe, Norway; Solar-Terrestrial Environment Laboratory, Nagoya University, Japan
Recommended Citation:
Mallet P.-E.,Claud C.,Cassou C.,et al. Polar lows over the nordic and labrador seas: Synoptic circulation patterns and associations with north atlantic-europe wintertime weather regimes[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(6)