DOI: 10.1175/JCLI-D-17-0350.1
Scopus记录号: 2-s2.0-85047102952
论文题名: Representation of extratropical cyclones, blocking anticyclones, and alpine circulation types in multiple reanalyses and model simulations
作者: Rohrer M. ; Brönnimann S. ; Martius O. ; Raible C.C. ; Wild M. ; Compo G.P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 8 起始页码: 3009
结束页码: 3031
语种: 英语
英文关键词: Blocking
; Climate models
; Extratropical cyclones
; Interannual variability
; Reanalysis data
Scopus关键词: Atmospheric movements
; Atmospheric pressure
; Classification (of information)
; Climate change
; Storms
; Atmospheric circulation
; Atmospheric circulation types
; Blocking
; Circulation type classifications
; Climate model simulations
; Extratropical cyclones
; Interannual variability
; Reanalysis
; Climate models
; annual variation
; anticyclone
; atmospheric circulation
; climate modeling
; climate variation
; ensemble forecasting
; extratropical cyclone
; westerly
; Atlantic Ocean
; Atlantic Ocean (North)
; Central Europe
英文摘要: Atmospheric circulation types, blockings, and cyclones are central features of the extratropical flow and key to understanding the climate system. This study intercompares the representation of these features in 10 reanalyses and in an ensemble of 30 climate model simulations between 1980 and 2005. Both modern, full-input reanalyses and century-long, surface-input reanalyses are examined. Modern full-input reanalyses agree well on key statistics of blockings, cyclones, and circulation types. However, the intensity and depth of cyclones vary among them. Reanalyses with higher horizontal resolution show higher cyclone center densities and more intense cyclones. For blockings, no strict relationship is found between frequency or intensity and horizontal resolution. Full-input reanalyses contain more intense blocking, compared to surface-input reanalyses. Circulation-type classifications over central Europe show that both versions of the Twentieth Century Reanalysis dataset contain more easterlies and fewer westerlies than any other reanalysis, owing to their high pressure bias over northeast Europe. The temporal correlation of annual circulation types over central Europe and blocking frequencies over the North Atlantic-European domain between reanalyses is high (around 0.8). The ensemble simulations capture the main characteristics of midlatitudinal atmospheric circulation. Circulation types of westerlies to northerlies over central Europe are overrepresented. There are too few blockings in the higher latitudes and an excess of cyclones in the midlatitudes. Other characteristics, such as blocking amplitude and cyclone intensity, are realistically represented, making the ensemble simulations a rich dataset to assess changes in climate variability. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111606
Appears in Collections: 气候减缓与适应
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作者单位: Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland; Institute of Geography, University of Bern, Bern, Switzerland; Mobiliar Lab for Natural Risks, University of Bern, Bern, Switzerland; Department of Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland; Institute of Atmospheric and Climate Sciences, ETH Zurich, Zurich, Switzerland; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Physical Sciences Division, NOAA/Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Rohrer M.,Brönnimann S.,Martius O.,et al. Representation of extratropical cyclones, blocking anticyclones, and alpine circulation types in multiple reanalyses and model simulations[J]. Journal of Climate,2018-01-01,31(8)