气候变化领域集成服务门户(CCPortal): Tropical cyclones likely enhance chemical weathering but suppress atmospheric CO2 consumption in landslide-dominated catchments

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DOI	10.1007/s10533-021-00805-8
	Tropical cyclones likely enhance chemical weathering but suppress atmospheric CO2 consumption in landslide-dominated catchments
	Wang C.-H.; Liou Y.-S.; Chen P.-H.; Huang J.-C.
发表日期	2021
ISSN	1682563
起始页码	537
结束页码	554
卷号	154 期号:3
英文摘要	The coupling between chemical weathering (including silicate, carbonate and pyrite weathering) and physical erosion is of high interest in active mountain belts. Participation of pyrite weathering which, results in CO2 emission to the atmosphere, also is of great research attention. Nevertheless, the responses of the (de-)couplings to landslide and typhoon are unclear. We used records of riverine TDS (total dissolved solids) and TSS (total suspended solids) with high-frequency sampling during typhoons to estimate chemical denudation rates of silicate (CDRsil), carbonate (CDRcarb), pyrite (CDRpyrite) and physical denudation rates (PDR) in two adjacent catchments, eastern Taiwan. Results show that the CDRsil in the two catchments is approx. 10-fold higher than the global mean, whereas the CDRcarb, CDRpyrite and PDR are over 15-fold higher than the global averages. Landslides likely elevate carbonate and sulfate dissolution, and streamflow is a kinetic control on the CDRs. Among CDRs, CDRsil remains constant with various landslides and typhoons. Yet, CDRcarb and CDRpyrite rapidly respond to typhoons and then contribute more CO2 emission. In sum, landslides expose fresh minerals to enhance chemical weathering; typhoons, which transport the dissolved solids within a short time and prompt new rainwater for weathering, are also dominant agents. We demonstrate the importance of dynamic partitioning of sulfuric and carbonic acid on silicate weathering for quantitative estimation of weathering-associated CO2 budget in active mountain belts. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
英文关键词	Active mountain belt; Chemical weathering; CO2 consumption; Landslide; Physical erosion; Taiwan
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184580
作者单位	Department of Natural Resources and Environmental Studies, National Dong Hwa University, Hualien County, Taiwan; Environmental Protection Bureau, Hualien County, Taiwan; Department of Geography, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Wang C.-H.,Liou Y.-S.,Chen P.-H.,et al. Tropical cyclones likely enhance chemical weathering but suppress atmospheric CO2 consumption in landslide-dominated catchments[J],2021,154(3).
APA	Wang C.-H.,Liou Y.-S.,Chen P.-H.,&Huang J.-C..(2021).Tropical cyclones likely enhance chemical weathering but suppress atmospheric CO2 consumption in landslide-dominated catchments.Biogeochemistry,154(3).
MLA	Wang C.-H.,et al."Tropical cyclones likely enhance chemical weathering but suppress atmospheric CO2 consumption in landslide-dominated catchments".Biogeochemistry 154.3(2021).