DOI: 10.1002/2014GL062803
论文题名: Artificial amplification of warming trends across the mountains of the western United States
作者: Oyler J.W. ; Dobrowski S.Z. ; Ballantyne A.P. ; Klene A.E. ; Running S.W.
刊名: Geophysical Research Letters
ISSN: 0094-9084
EISSN: 1944-8815
出版年: 2015
卷: 42, 期: 1 起始页码: 153
结束页码: 161
语种: 英语
英文关键词: elevation-dependent warming
; gridded climate data
; homogenization
; inhomogeneities
; SNOTEL
Scopus关键词: Climatology
; Ecosystems
; Homogenization method
; Landforms
; Water resources
; Climate change impact
; Climate data
; Elevation-dependent warming
; Inhomogeneities
; Minimum temperatures
; SNOTEL
; Temperature observations
; Western United States
; Climate change
; accuracy assessment
; climate conditions
; climate modeling
; extreme event
; mountain
; statistical analysis
; United States
英文摘要: Observations from the main mountain climate station network in the western United States (U.S.) suggest that higher elevations are warming faster than lower elevations. This has led to the assumption that elevation-dependent warming is prevalent throughout the region with impacts to water resources and ecosystem services. Here we critically evaluate this network's temperature observations and show that extreme warming observed at higher elevations is the result of systematic artifacts and not climatic conditions. With artifacts removed, the network's 1991-2012 minimum temperature trend decreases from +1.16°C decade-1 to +0.106°C decade-1 and is statistically indistinguishable from lower elevation trends. Moreover, longer-term widely used gridded climate products propagate the spurious temperature trend, thereby amplifying 1981-2012 western U.S. elevation-dependent warming by +217 to +562%. In the context of a warming climate, this artificial amplification of mountain climate trends has likely compromised our ability to accurately attribute climate change impacts across the mountainous western U.S. Key Points Extreme warming observed in western U.S. mountains is largely artificial Systematic observation bias has overstated higher-elevation warming Widely used gridded climate products propagate artificial warming signal ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921882909&doi=10.1002%2f2014GL062803&partnerID=40&md5=3dfe44232dd62a2b9565a75519127fe8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8700
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Numerical Terradynamic Simulation Group, Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, MT, United States
Recommended Citation:
Oyler J.W.,Dobrowski S.Z.,Ballantyne A.P.,et al. Artificial amplification of warming trends across the mountains of the western United States[J]. Geophysical Research Letters,2015-01-01,42(1).