气候变化领域集成服务门户(CCPortal): Evidence for accelerated weathering and sulfate export in high alpine environments

CCPortal

DOI	10.1088/1748-9326/ab5d9c
	Evidence for accelerated weathering and sulfate export in high alpine environments
	Crawford J.T.; Hinckley E.-L.S.; Litaor M.I.; Brahney J.; Neff J.C.
发表日期	2019
ISSN	17489318
卷号	14 期号:12
英文摘要	High elevation alpine ecosystems-the 'water towers of the world'-provide water for human populations around the globe. Active geomorphic features such as glaciers and permafrost leave alpine ecosystems susceptible to changes in climate which could also lead to changing biogeochemistry and water quality. Here, we synthesize recent changes in high-elevation stream chemistry from multiple sites that demonstrate a consistent and widespread pattern of increasing sulfate and base cation concentrations or fluxes. This trend has occurred over the past 30 years and is consistent across multiple sites in the Rocky Mountains of the United States, western Canada, the European Alps, the Icelandic Shield, and the Himalayas in Asia. To better understand these recent changes and to examine the potential causes of increased sulfur and base cation concentrations in surface waters, we present a synthesis of global records as well as a high resolution 33 year record of atmospheric deposition and river export data from a long-term ecological research site in Colorado, USA. We evaluate which factors may be driving global shifts in stream chemistry including atmospheric deposition trends and broad climatic patterns. Our analysis suggests that recent changes in climate may be stimulating changes to hydrology and/or geomorphic processes, which in turn lead to accelerated weathering of bedrock. This cascade of effects has broad implications for the chemistry and quality of important surface water resources. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Alpine; Calcium; Cations; Climate; Mountains; Sulfur; Weathering
语种	英语
scopus关键词	Calcium; Climate change; Deposition; Ecosystems; Meteorological problems; Positive ions; Rivers; Sulfur; Sulfur compounds; Surface water resources; Water quality; Water towers; Weathering; Accelerated weathering; Alpine; Atmospheric depositions; Climate; Geomorphic process; Long-term ecological research; Mountains; Stream chemistry; Atmospheric chemistry; alpine environment; atmospheric deposition; bedrock; calcium; cation; chemical weathering; climate change; concentration (composition); mountain region; permafrost; streamwater; sulfate; sulfur; surface water; Alps; Canada; Colorado; Himalayas; Rocky Mountains; United States; United States; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154225
作者单位	University of Colorado-Boulder, Boulder, CO, United States; MIGAL-Galilee Research Institute, Hydro-Geochemistry Lab, Tel Hai Research Park and Water Sciences Department, Tel Hai College, Upper Galilee, Israel; Utah State University, Logan, Utah, United States
推荐引用方式 GB/T 7714	Crawford J.T.,Hinckley E.-L.S.,Litaor M.I.,et al. Evidence for accelerated weathering and sulfate export in high alpine environments[J],2019,14(12).
APA	Crawford J.T.,Hinckley E.-L.S.,Litaor M.I.,Brahney J.,&Neff J.C..(2019).Evidence for accelerated weathering and sulfate export in high alpine environments.Environmental Research Letters,14(12).
MLA	Crawford J.T.,et al."Evidence for accelerated weathering and sulfate export in high alpine environments".Environmental Research Letters 14.12(2019).