DOI: 10.1002/2015GL066572
论文题名: Origin of variability in Northern Hemisphere winter blocking on interannual to decadal timescales
作者: Gollan G. ; Greatbatch R.J. ; Jung T.
刊名: Geophysical Research Letters
ISSN: 0094-8409
EISSN: 1944-8140
出版年: 2015
卷: 42, 期: 22 起始页码: 10037
结束页码: 10046
语种: 英语
英文关键词: blocking variability
; decadal variability
; ERA-40
; interannual variability
; relaxation experiments
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Oceanography
; Sea ice
; Surface waters
; Upper atmosphere
; Blocking variability
; Decadal variability
; ERA-40
; European centre for medium-range weather forecasts
; Interannual variability
; North Atlantic oscillations
; Sea surface temperature (SST)
; Tropospheric variability
; Weather forecasting
; annual variation
; decadal variation
; extratropical environment
; midlatitude environment
; North Atlantic Oscillation
; Northern Hemisphere
; sea ice
; sea surface temperature
; spatiotemporal analysis
; stratosphere
; timescale
; tropical region
; troposphere
; weather forecasting
; winter
; Eurasia
英文摘要: Variability of midlatitude blocking in the boreal winter Northern Hemisphere is investigated for the period 1960/1961 to 2001/2002 by means of relaxation experiments with the model of the European Centre for Medium-Range Weather Forecasts. It is shown that there is pronounced interannual and decadal variability in blocking, especially over the Eurasian continent, consistent with previous studies. The relaxation experiments show that realistic variability in the tropics can account for a significant part of observed interannual blocking variability but also that about half of the observed variability can only be explained by extratropical tropospheric variability. On the quasi-decadal timescale, extratropical sea surface temperature and sea ice, in addition to tropical variability, play a more important role. The stratosphere, which has been shown to influence interannual variability of the North Atlantic Oscillation in previous studies, has no significant influence on blocking according to our analysis. Key Points Interannual blocking variability in the NH is significantly influenced by tropical variability Extratropical SST and sea ice is influential especially on decadal timescales Half of the observed blocking variability can only be explained by extratropical tropospheric dynamics. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956899047&doi=10.1002%2f2015GL066572&partnerID=40&md5=e0953d5322ac59db519955ed404f299e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8025
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Gollan G.,Greatbatch R.J.,Jung T.. Origin of variability in Northern Hemisphere winter blocking on interannual to decadal timescales[J]. Geophysical Research Letters,2015-01-01,42(22).