气候变化领域集成服务门户(CCPortal): Warmer; Wetter Climates Accelerate Mechanical Weathering in Field Data; Independent of Stress-Loading

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DOI	10.1029/2020GL089062
	Warmer; Wetter Climates Accelerate Mechanical Weathering in Field Data; Independent of Stress-Loading
	Eppes M.C.; Magi B.; Scheff J.; Warren K.; Ching S.; Feng T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:24
英文摘要	Weathering is a foundational process in most Earth systems, but there has been a lack of data directly quantifying what influences mechanical weathering. Here we use multiple years of in situ field data, “listening” to acoustic emissions of naturally cracking rocks, to test a hypothesized link between climate and subcritical crack-tip processes (i.e., the bond-breaking mechanism thought to embody most mechanical weathering). Our results challenge the assumption of a singular dependence of mechanical weathering on stresses. We find that mechanical weathering rates exponentially increase as functions of atmospheric vapor pressure (VP), temperature, and relative humidity, even when controlling for stress-loading. VP exerts the most pronounced influence on the observed mechanical weathering rates. Put in the context of global climate change, our results underscore the potential for climate-dependent subcritical crack-tip processes to influence all weathering-allied problems including the long-term stabilization of the climate by weathering-carbon-cycle feedbacks. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Acoustic emission testing; Atmospheric humidity; Climate change; Crack propagation; Crack tips; Humidity control; Stress analysis; Bond-breaking; Carbon cycles; Earth systems; Field data; Global climate changes; In-field; Mechanical weatherings; Stress loading; Weathering
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169284
作者单位	Department of Geography & Earth Sciences, University of North Carolina at Charlotte, Charlotte, NC, United States; Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC, United States; Department of Computer Science, University of North Carolina at Charlotte, Charlotte, NC, United States
推荐引用方式 GB/T 7714	Eppes M.C.,Magi B.,Scheff J.,et al. Warmer; Wetter Climates Accelerate Mechanical Weathering in Field Data; Independent of Stress-Loading[J],2020,47(24).
APA	Eppes M.C.,Magi B.,Scheff J.,Warren K.,Ching S.,&Feng T..(2020).Warmer; Wetter Climates Accelerate Mechanical Weathering in Field Data; Independent of Stress-Loading.Geophysical Research Letters,47(24).
MLA	Eppes M.C.,et al."Warmer; Wetter Climates Accelerate Mechanical Weathering in Field Data; Independent of Stress-Loading".Geophysical Research Letters 47.24(2020).