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	The impact of solar radiation upon rock weathering at low temperature: a laboratory study
	Zhu L. P. ; Wang J. C. ; Li B. Y.
	2003
英文摘要	The impact of solar radiation heating upon rock temperatures in a cold environment was investigated by an experimental simulation. Different rock samples, collected from the central part of the Tibet Plateau, were pre-treated and put in a low-temperature box. Temperatures in the box changed by a radiation heat source that simulated solar insolation. Results show that the temperature-increase rate of samples saturated by water is similar to that saturated by salt solution, but the decrease rate of the former is higher than the latter. The temperature rebound derived from the potential heat release of the rock-interstitial water transition at -4 degreesC occurred more frequently on samples saturated by water than upon those saturated by salt solution. Salt content is a possible agent that inhibits the freeze-thaw process. Insolation heating induces faster temperature variations on the rock surface than in the interior. This is more closely related to rock mineral composition than to pore size and pore density. This implies that fast temperature variations may lead to the continuous expanding and contraction of the rock minerals. This may result in rock fatigue and may dominate the weathering process. These results, applied to different rocks saturated by water or salt solution, are also supported by measuring changes in ultrasonic-wave-transmitting rates. Copyright (C) 2003 John Wiley Sons, Ltd.
出处	Permafrost and Periglacial Processes
卷	14
期	1
页	61-67
收录类别	SCI
语种	英语
ISSN号	1045-6740
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22208]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhu L. P.,Wang J. C.,Li B. Y.. The impact of solar radiation upon rock weathering at low temperature: a laboratory study. 2003.

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