Isolating the direct and indirect impacts of urbanization on vegetation carbon sequestration capacity in a large oasis city:evidence from Urumqi,China  

作　　者：Qingwei Zhuang Zhenfeng Shao Deren Li Xiao Huang Orhan Altan Shixin Wu Yuzhen Li 

机构地区：[1]State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan,China [2]Department of Geosciences,University of Arkansas,Fayetteville,AD,USA [3]Department of Geomatics Engineering,Istanbul Technical University,Istanbul,Turkey [4]State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,China [5]School of Emergency Management,Xihua University,Chengdu,China

出　　处：《Geo-Spatial Information Science》2023年第3期379-391,共13页地球空间信息科学学报（英文）

基　　金：supported by the National Natural Science Foundation of China[grant numbers 42090012,41771452,41771454];the National Key Research and Development Program of China[grant number 2018YFB0505401];03 special research and 5G project of Jiangxi Province in China[grant number 20212ABC03A09];Zhuhai industry university research cooperation project of China[grant number ZH22017001210098PWC];Natural Science Foundation of Sichuan[grant number 2022NSFCSC1124].

摘　　要：Oasis cities are deeply affected by human activities in arid and semi-arid regions.Vegetation is an important repository in the carbon cycle of oasis urban ecosystems.The continuous expansion of urban has a disproportionate impact on the carbon sequestration capacity of vegetation.Till now,studies have been conducted to quantify the impact of urbanization on vegetation carbon sequestration capacity,the mechanism of such impact remains unclear and lacks systematic investigations,especially in oasis urban.Understanding the impact mechanism greatly benefits the sustainable development of oasis urban and regional carbon neutrality.To fill this knowledge gap,we design a theoretical framework to analyze the impact of urbanization on vegetation carbon sequestration capacity by isolating the direct and indirect impacts in Urumqi,China.Some results based on Landsat images indicated that the Impervious Surface Areas(ISAs)expanded by 436.98 km2 during 2000-2019.The Net Primary Productivity(NPP)calculated using the Vegetation Photosynthesis Model(VPM)was directly caused by the loss of 51.45 Gg C(1 Gg=109 g).Another important finding proved that the direct carbon loss caused by urbanization did not change the upward trend of the total carbon sequestration capacity of vegetation,but only slowed down this upward trend by 20.86%.Our results provide new insights into urban vegetation carbon sinks and contribute to a better understanding of the uncertainty of urbanization toward carbon neutrality.This study will provide scientific data support and suggestions for the sustainable development of oasis cities and the regional carbon budget.

关 键 词：OASIS URBANIZATION VEGETATION carbon neutrality net primary productivity(NPP) 

分 类 号：F299.21[经济管理—国民经济]