DOI: 10.1175/JCLI-D-14-00697.1
Scopus记录号: 2-s2.0-84938804155
论文题名: Observed trends in Canada's climate and influence of low-frequency variability modes
作者: Vincent L.A. ; Zhang X. ; Brown R.D. ; Feng Y. ; Mekis E. ; Milewska E.J. ; Wan H. ; Wang X.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 11 起始页码: 4545
结束页码: 4560
语种: 英语
Scopus关键词: Atmospheric temperature
; Climatology
; Snow
; Stream flow
; Climate variability
; Oscillations
; Snow covers
; Surface temperatures
; Trends
; Climate change
; atmospheric circulation
; climate change
; long-term change
; snow cover
; surface temperature
; trend analysis
; Canada
英文摘要: Trends in Canada's climate are analyzed using recently updated data to provide a comprehensive view of climate variability and long-term changes over the period of instrumental record. Trends in surface air temperature, precipitation, snow cover, and streamflow indices are examined along with the potential impact of low-frequency variability related to large-scale atmospheric and oceanic oscillations on these trends. The results show that temperature has increased significantly in most regions of Canada over the period 1948-2012, with the largest warming occurring in winter and spring. Precipitation has also increased, especially in the north. Changes in other climate and hydroclimatic variables, including a decrease in the amount of precipitation falling as snow in the south, fewer days with snow cover, an earlier start of the spring high-flow season, and an increase in April streamflow, are consistent with the observed warming and precipitation trends. For the period 1900-2012, there are sufficient temperature and precipitation data for trend analysis for southern Canada (south of 60°N) only. During this period, temperature has increased significantly across the region, precipitation has increased, and the amount of precipitation falling as snow has decreased in many areas south of 55°N. The results also show that modes of low-frequency variability modulate the spatial distribution and strength of the trends; however, they alone cannot explain the observed long-term trends in these climate variables. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50387
Appears in Collections: 气候变化事实与影响
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作者单位: Climate Research Division, Science and Technology Branch, Environment Canada, Toronto, ON, Canada
Recommended Citation:
Vincent L.A.,Zhang X.,Brown R.D.,et al. Observed trends in Canada's climate and influence of low-frequency variability modes[J]. Journal of Climate,2015-01-01,28(11)