DOI: 10.1002/joc.5546
论文题名: Climatological trends of snowfall over the Laurentian Great Lakes Basin
作者: Baijnath-Rodino J.A. ; Duguay C.R. ; LeDrew E.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 10 起始页码: 3942
结束页码: 3962
语种: 英语
英文关键词: climate
; lake-effect snowfall
; lake-induced snowfall
; Laurentian Great Lakes Basin
; precipitation
; snowbelt
; trend
Scopus关键词: Boundary layers
; Digital storage
; Moisture
; Precipitation (chemical)
; Snow
; Climate
; Lake effects
; Laurentian Great Lakes
; Snowbelt
; Trend
; Lakes
; boundary layer
; climatology
; ice cover
; precipitation assessment
; snow
; spatiotemporal analysis
; trend analysis
; warming
; Canada
; Georgian Bay
; Great Lakes Basin
; Great Lakes [North America]
; Lake Huron
; Lake Superior
; Ontario [Canada]
英文摘要: The leewards shores of the Laurentian Great Lakes are highly susceptible to lake-induced snowfall. During the late autumn and winter season, cold air advection over relatively warm lakes can induce instability in the lower planetary boundary layer (PBL), facilitating the exchange of moisture and energy fluxes and fuelling the development of snowfall. Snowfall in this region can have disastrous impacts on local communities such as the November 2014 Buffalo storm that caused 13 fatalities. This paper discusses historical snowfall trends along the Canadian leewards shores of Lakes Superior and Huron-Georgian Bay and explores several lake-induced predictor variables that may influence the snowfall trends. Spatio-temporal snowfall and total precipitation trends were computed for the 1980–2015 period over the Great Lakes Basin (GLB) using the Daymet (version 3) gridded estimated data set. Results show a significant decrease in snowfall, at a rate of 40 cm/36 years, and a significant decrease in total precipitation of 20 mm/36 years, along the Ontario snowbelts of Lake Superior and partially along that of Lake Huron-Georgian Bay at the 95% confidence level during the cold season. Attributions to these negative spatio-temporal trends are explored using data from the North American Regional Reanalysis (NARR) and the Canadian Ice Service (CIS) data sets. Predictor variables show significant warming in lake surface temperature (LST) at a rate of over 6 K/36 years for Lake Superior, significant decrease in ice cover fraction for both lakes, and an increase in the vertical temperature gradient (VTG) between the LST and the 850 mb level. While the behavioural trends of these variables are believed to enhance snowfall through increased evaporation, there are other complex processes involved, such as inefficient moisture recycling and increased moisture storage in warmer air masses that may inhibit the development of snowfall along the immediate leewards shores of Lake Superior. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116821
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geography and Environmental Management and Interdisciplinary Centre on Climate Change, University of Waterloo, Waterloo, ON, Canada
Recommended Citation:
Baijnath-Rodino J.A.,Duguay C.R.,LeDrew E.. Climatological trends of snowfall over the Laurentian Great Lakes Basin[J]. International Journal of Climatology,2018-01-01,38(10)