干旱区生态环境知识资源中心(Arid): Rain-induced weathering dissolution of limestone and implications for the soil sinking-rock outcrops emergence mechanism at the karst surface: a case study in southwestern China

Arid

DOI	10.1007/s13146-022-00813-1
	Rain-induced weathering dissolution of limestone and implications for the soil sinking-rock outcrops emergence mechanism at the karst surface: a case study in southwestern China
	Zhao, Zhimeng; Shen, Youxin
通讯作者	Zhao, ZM
来源期刊	CARBONATES AND EVAPORITES
ISSN	0891-2556
EISSN	1878-5212
出版年	2022
卷号	37 期号:4
英文摘要	Carbonate weathering by rain is considered to play an important role in the karst landform evolution. Rock outcrops (or stone teeth) are frequently visible on the earth's surface, especially in karst landscapes, but there is no consensus on how they appeared or increased in number. This study estimated the extent of rain-induced weathering dissolution of limestone using hydro-chemical data from a karst area enjoying a subtropical monsoon climate, and proposed a mechanism of soil sinking and rock outcrops emerging, based on the assumption that the dissolved subsoil limestone is the main cause of geomorphic reworking of the karst surface topography. By calculation, the weathering dissolution rate of subsoil limestone is greater than the residue formation rate by dissolution of exposed and subsoil limestone in both forested and cleared karst surfaces, and soil sink at a rate of 0.126 mm a(-1) in forested and 0.111 mm a(-1) in the cleared karst, implying relative growth of exposed limestone and the spontaneity of the karst process. Besides, smaller values of subsoil dissolution rate and soil sinking rate in the cleared than in the forested demonstrate that soil sinking and rock outcrops emergence are both slower without the cover of forests, while the opposite was true for dissolution of exposed limestone, implying that deforestation may not an absolute promoting factor to karst landscape. This soil sinking model provides a new explanation for the changes in the soil-rock position relationship, which is contrasting with the traditional karst soil loss model that generally attributes rock emergence to soil slope erosion or/and underground soil leaks.
英文关键词	Carbonate dissolution Hydrogeochemical processes Karst area Outcrops Soil loss
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000855446100001
WOS关键词	EROSION ; DESERTIFICATION ; TRANSFORMATION ; GROUNDWATER ; HILLSLOPES ; GUIZHOU ; BEDROCK ; IMPACT ; ROOTS ; SLOPE
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392058
推荐引用方式 GB/T 7714	Zhao, Zhimeng,Shen, Youxin. Rain-induced weathering dissolution of limestone and implications for the soil sinking-rock outcrops emergence mechanism at the karst surface: a case study in southwestern China[J],2022,37(4).
APA	Zhao, Zhimeng,&Shen, Youxin.(2022).Rain-induced weathering dissolution of limestone and implications for the soil sinking-rock outcrops emergence mechanism at the karst surface: a case study in southwestern China.CARBONATES AND EVAPORITES,37(4).
MLA	Zhao, Zhimeng,et al."Rain-induced weathering dissolution of limestone and implications for the soil sinking-rock outcrops emergence mechanism at the karst surface: a case study in southwestern China".CARBONATES AND EVAPORITES 37.4(2022).