干旱区生态环境知识资源中心(Arid): Assessment of chemical weathering mechanism and CO2 drawdown in distinct hydromicroclimate glacierized catchments, Western Himalayas

Arid

DOI	10.1007/s10668-022-02674-z
	Assessment of chemical weathering mechanism and CO2 drawdown in distinct hydromicroclimate glacierized catchments, Western Himalayas
	Biswal, Kalyan; Kumar, Naveen; Ramanathan, A. L.; Soheb, Mohd
通讯作者	Kumar, N
来源期刊	ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
ISSN	1387-585X
EISSN	1573-2975
出版年	2023
卷号	25 期号:12 页码:14453-14476
英文摘要	The present study investigates the role of varying subglacial drainage distribution, discharge patterns and reactive mineralogy in switching the chemical weathering mechanism and altering CO2 drawdown in distinct hydromicroclimate. Catchments with less glacierized area (Stok and Phutse in cold-arid zones) bestow high (ablation/accumulation)(area) ratio and large spatial extent of channelized subglacial conduits and, thus permit high specific discharge. Conversely, Chhota Shigri (CS) acquires large glacierized portion covered under accumulation zone. The low (ablation/accumulation)(area) ratio promotes the development of lesser channelized and more distributed subglacial drainage, allowing low specific discharge in CS basin. As a consequence of distinct drainage characteristics, carbonation reaction processed through atmospheric CO2 and calcite dissolution becomes the locus of solute generation in Phutse and Stok. Correspondingly, carbonate weathering mediated CO2 drawdown override and remains on the higher side than silicate weathering and thus makes the system potential sink to atmospheric CO2. Meltwater draining in Phutse and Stok shows neutral pH, low sulphate mass fractionation (SMF) and low pCO(2). In contrary, Chhota Shigri augments predominant sulphide oxidation and carbonation via atmospheric CO2 as a major source of H+ for chemical weathering during low and high ablation seasons, respectively. Elevated role of sulphide oxidation in chemical weathering promotes high SMF, high pCO(2) and lowered alkalinity during low ablation, which may act as a source of atmospheric CO2 in Chhota Shigri.
英文关键词	Western Himalayas Hydrochemistry CO2 sequestration Rock-water interaction Subglacial drainage
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000857293500001
WOS关键词	CHHOTA SHIGRI GLACIER ; SOLUTE ACQUISITION ; GANGOTRI GLACIER ; MASS-BALANCE ; MELTWATER ; BASIN ; RIVER ; VARIABILITY ; LADAKH ; RATES
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396089
推荐引用方式 GB/T 7714	Biswal, Kalyan,Kumar, Naveen,Ramanathan, A. L.,et al. Assessment of chemical weathering mechanism and CO2 drawdown in distinct hydromicroclimate glacierized catchments, Western Himalayas[J],2023,25(12):14453-14476.
APA	Biswal, Kalyan,Kumar, Naveen,Ramanathan, A. L.,&Soheb, Mohd.(2023).Assessment of chemical weathering mechanism and CO2 drawdown in distinct hydromicroclimate glacierized catchments, Western Himalayas.ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY,25(12),14453-14476.
MLA	Biswal, Kalyan,et al."Assessment of chemical weathering mechanism and CO2 drawdown in distinct hydromicroclimate glacierized catchments, Western Himalayas".ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY 25.12(2023):14453-14476.