DOI: 10.5194/tc-9-2417-2015
Scopus记录号: 2-s2.0-84951758720
论文题名: Inconsistency in precipitation measurements across the Alaska-Yukon border
作者: Scaff L ; , Yang D ; , Li Y ; , Mekis E
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 6 起始页码: 2417
结束页码: 2428
语种: 英语
英文关键词: discontinuity
; environmental conditions
; environmental gradient
; error correction
; gauge
; measurement method
; precipitation (climatology)
; precipitation assessment
; regression analysis
; sampling bias
; snow
; Alaska
; Barter Island
; Canada
; United States
; Yukon Territory
英文摘要: This study quantifies the inconsistency in gauge precipitation observations across the border of Alaska and Yukon. It analyses the precipitation measurements by the national standard gauges (National Weather Service (NWS) 8 in. gauge and Nipher gauge) and the bias-corrected data to account for wind effect on the gauge catch, wetting loss and trace events. The bias corrections show a significant amount of errors in the gauge records due to the windy and cold environment in the northern areas of Alaska and Yukon. Monthly corrections increase solid precipitation by 136 % in January and 20 % for July at the Barter Island in Alaska, and about 31 % for January and 4 % for July at the Yukon stations. Regression analyses of the monthly precipitation data show a stronger correlation for the warm months (mainly rainfall) than for cold month (mainly snowfall) between the station pairs, and small changes in the precipitation relationship due to the bias corrections. Double mass curves also indicate changes in the cumulative precipitation over the study periods. This change leads to a smaller and inverted precipitation gradient across the border, representing a significant modification in the precipitation pattern over the northern region. Overall, this study discovers significant inconsistency in the precipitation measurements across the USA-Canada border. This discontinuity is greater for snowfall than for rainfall, as gauge snowfall observations have large errors in windy and cold conditions. This result will certainly impact regional, particularly cross-border, climate and hydrology investigations. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75207
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Global Institute for Water Security, School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, Canada; National Hydrology Research Center, Environment and Climate Change Canada, Saskatoon, SK, Canada; Climate Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, ON, Canada
Recommended Citation:
Scaff L,, Yang D,, Li Y,et al. Inconsistency in precipitation measurements across the Alaska-Yukon border[J]. Cryosphere,2015-01-01,9(6)