Current status and research prospects of terrestrial ecosystem carbon sink in Northeast China

doi:10.13287/j.1001-9332.202409.006

Abstract

Abstract: Increasing the carbon sink capacity of terrestrial ecosystems is a primary strategy to mitigate climate change and achieve the “carbon neutrality” goal. Clarifying the status and future dynamics of carbon sink of terrestrial ecosystems in Northeast China is crucial for achieving “carbon neutrality” as this region is a core contributor to carbon sink in China's terrestrial ecosystems. Here, we systematically summarized current research on carbon sink of terrestrial ecosystems across Northeast China, including the measurements and spatial-temporal patterns of carbon sinks, driving mechanisms of carbon sinks, the assessments of carbon sink potential, and technologies for increasing carbon sequestration. There are substantial uncertainties in quantifying terrestrial ecosystem carbon sink in Northeast China due to differences in data sources and methods, especially for forest carbon sink measurements, ranging from 0.020 to 0.157 Pg C·a^-1. Carbon sink function depends on carbon exchange processes across plant-soil-atmosphere interfaces. The key pathways to enhance carbon sequestration in Northeast China under different temporal and spatial scales remains unclear. Improving terrestrial ecosystem quality is the key and core of carbon sequestration and sink enhancement. However, there is an urgent need to develop a multi-ecosystem collaborative carbon sequestration and sink enhancement technology system for the “dual carbon” goal. Future research needs to develop an accurate carbon sink measurement system that integrates multi-source data and multi-scale technologies to accurately assess the function and potential of carbon sink in Northeast China, focus on the multi-scale driving mechanism of carbon sink functions, develop new technical systems for coordinated enhancement of carbon sink for the Northeast terrestrial ecosystems, and carry out demonstrations of carbon sink enhancement technologies. These efforts will provide the scientific and technological supports for achieving the “carbon neutrality” goal.

Key words: terrestrial carbon sink, carbon measurement, carbon sequestration technology, carbon sink potential, Northeast China

WANG Xugao, LYU Xiaotao, XI Fengming, LIU Zhihua, LIANG Yu, GAO Tian, SUN Tao, YU Dapao, WANG Chao, MA Qiang, LIANG Chao, ZHENG Tiantian, WANG Jiaoyue, YIN Yan, JIAO Kewei, LIU Bo, ZHU Jiaojun. Current status and research prospects of terrestrial ecosystem carbon sink in Northeast China[J]. Chinese Journal of Applied Ecology, 2024, 35(9): 2322-2337.

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