Analysis of Carbon Sink Infrastructure Network for Blue-Green Space in Coastal Zone Cities:Take Beibu Gulf of Guangxi as an Example
Exploring the function of carbon sink services for Blue-Green Infrastructure(BGI)is beneficial to guide the construction of urban carbon neutrality targets.Taking cities in the coastal zone of Guangxi Beibu Gulf as examples,by using Morphological Spatial Pattern Analysis(MSPA),connectivity analysis and circuit theory,a BGI carbon sink network is constructed,and the corresponding carbon sequestration countermeas-ures are discussed.The results show that the total amount of carbon sinks in the blue-green space of the stud-y area in 2020 was 735 524.09 tC·a-1,of which the total amount of carbon sinks in the green space was 588 680.06 tC·a-1,and the total amount of carbon sinks in the blue space was 146 844.03 tC·a-1.The car-bon sink per unit area is higher in"blue"than in"green".A total of 63 ecological source patches and 20 core source patches were extracted.The total area of the green space core source was 6 814.31 km2,and the blue space was 899.05 km2.The core source was mainly distributed in the east and west sides and the southern coastal area.A total of 24 ecological corridors were extracted,with a total length of 122.21 km for the green corridor and 52.75 km for the blue corridor,which were circularly distributed.The central and southern re-gions were densely distributed and had a strong connectivity.The results of this study provide construction i-deas for the protection and sustainable development of coastal cities under the background of"carbon peak and carbon neutrality"(referred to as"double carbon").
coastal zone citiesblue-green spacecarbon sink infrastructureGuangxi Beibu GulfMorphologi-cal Spatial Pattern Analysis(MSPA)circuit theory
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