DOI: 10.1016/j.gloplacha.2016.07.015
论文题名: Assessment of climate impacts on the karst-related carbon sink in SW China using MPD and GIS
作者: Zeng S. ; Jiang Y. ; Liu Z.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2016
卷: 144 起始页码: 171
结束页码: 181
语种: 英语
英文关键词: Climate change
; GIS
; Karst-related carbon sink
; MPD
; SW China
Scopus关键词: Carbonation
; Catchments
; Climate models
; Dissolution
; Geographic information systems
; Landforms
; Runoff
; Carbon sink
; Climate condition
; Global carbon cycle
; Human activities
; Regional climate
; Riverine carbon fluxes
; Spatio-temporal changes
; SW China
; Climate change
; air temperature
; carbon sink
; catchment
; climate change
; discharge
; dissolution
; environmental impact assessment
; GIS
; global climate
; human activity
; hydrological change
; karst
; regional climate
; runoff
; China
; Yunnan-Guizhou Plateau
英文摘要: Riverine carbon fluxes of some catchments in the world have significantly changed due to contemporary climate change and human activities. As a large region with an extensive karstic area of nearly 7.5 × 105 km2, Southwest (SW) China has experienced dramatic climate changes during recent decades. Although some studies have investigated the karst-related carbon sink in some parts of this region, the importance of climate impacts have not been assessed. This research examined the impacts of recent climate change on the karst-related carbon sink in the SW China for the period 1970–2013, using a modified maximal potential dissolution (MPD) method and GIS. We first analyzed the major determinants of carbonate dissolution at a spatial scale, calculated the total karst-related carbon sink (TCS) and carbon sink fluxes (CSFs) in the SW China karst region with different types of carbonate rocks, and then compared with other methods, and analyzed the causes of CSFs variations under the changed climate conditions. The results show that the TCS in SW China experienced a dramatic change with regional climate, and there was a trend with TCS decreasing by about 19% from 1970s to 2010s. This decrease occurred mostly in Guizhou and Yunnan provinces, which experienced larger decreases in runoff depth in the past 40 years (190 mm and 90 mm, respectively) due to increased air temperature (0.33 °C and 1.04 °C, respectively) and decreased precipitation (156 mm and 106 mm, respectively). The mean value of CSFs in SW China, calculated by the modified MPD method, was approximately 9.36 t C km− 2 a− 1. In addition, there were large differences in CSFs among the provinces, attributed to differences in regional climate and to carbonate lithologies. These spatiotemporal changes depended mainly on hydrological variations (i.e., discharge or runoff depth). This work, thus, suggests that the karst-related carbon sink could respond to future climate change quickly, and needs to be considered in the modern global carbon cycle model. © 2016 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979731410&doi=10.1016%2fj.gloplacha.2016.07.015&partnerID=40&md5=a8df8873a5afd12656f6bae21fba040f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11639
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: School of Geographical Sciences, Southwest University, Chongqing, China
Recommended Citation:
Zeng S.,Jiang Y.,Liu Z.. Assessment of climate impacts on the karst-related carbon sink in SW China using MPD and GIS[J]. Global and Planetary Change,2016-01-01,144.