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Carbon sequestration potential and its eco-service function in the karst area, China
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Carbon sequestration potential and its eco-service function in the karst area, China
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Journal Article
Carbon sequestration potential and its eco-service function in the karst area, China
2017
Overview
The karst critical zone is an essential component of the carbon （C） pool, constituting the global C cycle. It is referred to as one of the ＂residual land sink＂ that remains largely in- determinate. Karst area （2.2×10^7 km^2） comprises 15% of the world＇s land area, and karst area comprises 3.44~106 km^2 of area in China. Due to the complexity of karst structure and its considerable heterogeneity, C sequestration rate estimations contain large inaccuracies, especially in relation to the different methods used in calculations. Therefore, we reevaluated rock weathering-related C sink estimations in China （approximately 4.74 Tg C yr^-1）, which we calibrated from previous studies. Additionally, we stipulated that more comprehensive re- search on rock-soil-biology-atmosphere continuum C migration is essential to better under- stand C conversion mechanisms based on uncertainty analyses of C sink estimations. Moreover, we stressed that a collective confirmation of chemical methods and simulated models through a combined research effort could at least partially eliminate such uncertainty. Furthermore, integrated C cycling research need a long-term observation of the carbon flux of multi-interfaces. The enhanced capacity of ecosystem C and soil C pools remains an effective way of increasing C sink. Karst ecosystem health and security is crucial to human social de- velopment, accordingly, it is critical that we understand thresholds or potential C sink capacities in karst critical zones now and in the future.
Publisher
Science Press,Springer Nature B.V
Subject
