气候变化领域集成服务门户(CCPortal): A multi-century; tree-ring-derived perspective of the North Cascades (USA) 2014

CCPortal

DOI	10.1007/s10584-020-02719-0
	A multi-century; tree-ring-derived perspective of the North Cascades (USA) 2014–2016 snow drought
	Harley G.L.; Maxwell R.S.; Black B.A.; Bekker M.F.
发表日期	2020
ISSN	0165-0009
起始页码	127
结束页码	143
卷号	162 期号:1
英文摘要	Cool-season precipitation is a critical component of western North American water supplies. In recent decades, snow water equivalent (snowpack) has declined dramatically, culminating in record lows along the northern Cascade Range, USA, during the winters of 2014 and 2015. Given the brevity of observational records, the extent to which these recent trends exceed historical ranges of variability remains poorly understood. Here, we use a network of 30 tree-ring chronologies to reconstruct April 1 snowpack in the northern Cascade Mountains (Washington, USA) over the past ca. 400 years that accounts for 62% of the instrumental period variability. The reconstruction is characterized by considerable interannual- to interdecadal-scale variability. Yet, the most conspicuous feature is a decline that began in the mid-1970s concurrent with a shift to above-average air temperature which is accelerated through to the most recent years of the record. The 2014–2016 snow drought, especially snow conditions during the 2015 winter, across the northern Cascades is unprecedented within the context of the last 400 years. The reconstruction is characterized by considerable interannual- to interdecadal-scale variability, but a conspicuous decline emerged in the mid-1970s and accelerated through to the most recent years of the record to levels below the pre-industrial envelope of variability. This decline culminated in the 2014–2016 northern Cascade Mountains snow drought, which is unprecedented within the context of the last 400 years. Not only is the twentieth–twenty-first century period characterized by the rapid decline in snowpack conditions, it is also highly volatile. Extreme flips in snowpack conditions (year-to-year changes between < 5th and > 95th percentiles) during the twentieth and twenty-first centuries were anomalous within the context of the record. These patterns described for the North Cascades are concurrent with anomalously low snowpack in the Sierra Nevada Mountains of California, and thus part of a broader trend toward reduced snowpack in western North America. This decline will fundamentally impact regional drought and hydrography in North Cascadia and is likely the combined result of rising temperatures, weakening © 2020, Springer Nature B.V.
英文关键词	Climate reconstruction; Dendrochronology; Paleoclimatology; Snow drought; Snowpack
语种	英语
scopus关键词	Drought; Landforms; Snow; Water supply; Average air temperature; Cool season precipitation; Critical component; Period variability; Rising temperatures; Snow water equivalent; Tree-ring chronologies; Washington , USA; Forestry; air temperature; annual variation; dendrochronology; hydrography; reconstruction; snow water equivalent; snowpack; tree ring; California; Cascade Range; Sierra Nevada; Sierra Nevada [California]; United States; Washington [United States]
来源期刊	Climatic Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147111
作者单位	Idaho Tree-Ring Lab, Department of Geography, University of Idaho, Moscow, ID 83843, United States; Department of Geospatial Science, Radford University, Radford, VA 24142, United States; Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721, United States; Department of Geography, Brigham Young University, 690 KMBL, Provo, UT 84602, United States
推荐引用方式 GB/T 7714	Harley G.L.,Maxwell R.S.,Black B.A.,等. A multi-century; tree-ring-derived perspective of the North Cascades (USA) 2014–2016 snow drought[J],2020,162(1).
APA	Harley G.L.,Maxwell R.S.,Black B.A.,&Bekker M.F..(2020).A multi-century; tree-ring-derived perspective of the North Cascades (USA) 2014–2016 snow drought.Climatic Change,162(1).
MLA	Harley G.L.,et al."A multi-century; tree-ring-derived perspective of the North Cascades (USA) 2014–2016 snow drought".Climatic Change 162.1(2020).