DOI: 10.1002/jgrd.50635
论文题名: Northern Hemisphere summer temperature and specific humidity anomalies from two reanalyses
作者: Gill E.C. ; Chase T.N. ; Pielke Sr. R.A. ; Wolter K.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8297
结束页码: 8305
语种: 英语
英文关键词: climate
; climatology
; extreme events
; hydroclimatology
; time series analysis
Scopus关键词: Time series analysis
; climate
; Extreme events
; Hydro climatologies
; NCEP reanalysis
; Northern Hemispheres
; Specific humidity
; Standard deviation
; Summer temperature
; Climatology
; air temperature
; climatology
; extreme event
; global warming
; heat balance
; humidity
; magnitude
; Northern Hemisphere
; summer
; threshold
; time series analysis
; Arctic
; Greenland
英文摘要: This study investigates the magnitude and spatial extent of extreme summer temperature and specific humidity events in the extratropical northern hemisphere (NHEXT) using the NCEP Reanalysis (1979-2012) and the 20th century reanalysis (1871-2010). Specifically, we look at the percentage of area exceeding standard deviation thresholds in layer-averaged (500 mb-1000 mb) temperature and surface-level specific humidity to classify extremes. We find that: (1) areas of the NHEXT, including the southwestern tip of Greenland, experienced a summer heat wave during 2012 that was almost as extreme in spatial extent and magnitude as the Russian heat wave of 2010, (2) there is an increasing trend in summer heat waves and positive specific humidity anomalies and a decreasing trend in summer cold waves and negative specific humidity anomalies, and (3) while similar patterns in the global trend (1979-2012) in variability exist for both temperature and specific humidity, areas of increased variability are not necessarily the areas that have experienced extreme heat waves. Key Points A summer 2012 heat wave near Greenland rivaled the extremity of Russia 2010 The magnitude and spatial extent of extreme heat waves has increased since 1979 Heat waves are not occurring in areas of increased variability since 1979 ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 0946502GK-12
; AGS 1219833
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63466
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: Cooperative Institute for Research in Environmental Science, University of Colorado Boulder, UCB 216, Boulder, CO 80309-0216, United States; Hydrology, Water Resources, and Environmental Fluid Mechanics, Civil Engineering, University of Colorado Boulder, Boulder CO, United States; Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder CO, United States; Physical Sciences Division, ESRL, NOAA, Boulder CO, United States
Recommended Citation:
Gill E.C.,Chase T.N.,Pielke Sr. R.A.,et al. Northern Hemisphere summer temperature and specific humidity anomalies from two reanalyses[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)