气候变化领域集成服务门户(CCPortal): Inconsistency in precipitation measurements across the Alaska-Yukon border

CCPortal

DOI	10.5194/tc-9-2417-2015
	Inconsistency in precipitation measurements across the Alaska-Yukon border
	Scaff L.; Yang D.; Li Y.; Mekis E.
发表日期	2015
ISSN	19940416
卷号	9 期号:6
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.
学科领域	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
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119766
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
推荐引用方式 GB/T 7714	Scaff L.,Yang D.,Li Y.,et al. Inconsistency in precipitation measurements across the Alaska-Yukon border[J],2015,9(6).
APA	Scaff L.,Yang D.,Li Y.,&Mekis E..(2015).Inconsistency in precipitation measurements across the Alaska-Yukon border.Cryosphere,9(6).
MLA	Scaff L.,et al."Inconsistency in precipitation measurements across the Alaska-Yukon border".Cryosphere 9.6(2015).