Land use and cover change accelerated China’s land carbon sinks limits soil carbon

IF 8.5 1区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

npj Climate and Atmospheric Science Pub Date : 2024-08-27 DOI:10.1038/s41612-024-00751-w

Yue Cheng, Peng Luo, Hao Yang, Mingwang Li, Ming Ni, Honglin Li, Yu Huang, Wenwen Xie, Lihuan Wang

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Abstract

Land use and cover change (LUCC) significantly impacts global carbon cycles and land surface properties, accounting for 25% of the historical atmospheric CO2 increase. We explore a previously overlooked role of LUCC in driving the land carbon cycle by using a three-level meta-analysis and Land Use Harmonization data to drive an ecosystem model. Our findings reveal that a loss of 39.2% of soil organic carbon (SOC) change in China due to LUCC, mitigated by afforestation, doubles gross primary productivity at 0.02 Pg C yr−1, countering central China’s urbanization decline. Indirect climate effects, especially soil bulk density, significantly impact SOC compared to direct climate effects. LUCC has significantly increased the Chinese terrestrial carbon sink, with net ecosystem productivity reaching 0.02 ± 0.12 Pg C yr−1. Our study underscores the importance of reforestation and afforestation in addressing climate change and enhancing carbon sinks in future carbon management.

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土地利用和植被变化加速中国土地碳汇限制土壤碳汇

土地利用和植被变化（LUCC）对全球碳循环和地表特性有重大影响，占历史上大气二氧化碳增加量的 25%。我们利用三级荟萃分析和土地利用协调数据来驱动一个生态系统模型，从而探索以前被忽视的土地利用和植被变化在推动土地碳循环中的作用。我们的研究结果表明，在中国，由于土地利用变化造成的土壤有机碳（SOC）变化损失为 39.2%，在植树造林的缓解下，总初级生产力翻了一番，达到每年 0.02 Pg C-1，抵消了中国中部城市化的衰退。与直接气候效应相比，间接气候效应（尤其是土壤容重）对 SOC 的影响更大。陆地碳汇大幅增加了中国陆地碳汇，生态系统净生产力达到 0.02 ± 0.12 Pg C yr-1。我们的研究强调了重新造林和植树造林在未来碳管理中应对气候变化和增加碳汇的重要性。

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来源期刊

npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science

CiteScore

8.80

自引率

3.30%

发文量

审稿时长

21 weeks

期刊介绍： npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.