Altered growth conditions more than reforestation counteracted forest biomass carbon emissions 1990–2020

编号 010031603

推送时间 20211108

研究领域 森林生态 

年份 2021 

类型 期刊 

语种 英语

标题 Altered growth conditions more than reforestation counteracted forest biomass carbon emissions 1990–2020

来源期刊 Nature Communications

期 第316期

发表时间 20211019

关键词 Carbon cycle;  Forestry;  Macroecology; 

摘要 Understanding the carbon (C) balance in global forest is key for climate-change mitigation. However, land use and environmental drivers affecting global forest C fluxes remain poorly quantified. Here we show, following a counterfactual modelling approach based on global Forest Resource Assessments, that in 1990–2020 deforestation is the main driver of forest C emissions, partly counteracted by increased forest growth rates under altered conditions: In the hypothetical absence of changes in forest (i) area, (ii) harvest or (iii) burnt area, global forest biomass would reverse from an actual cumulative net C source of c. 0.74 GtC to a net C sink of 26.9, 4.9 and 0.63 GtC, respectively. In contrast, (iv) without growth rate changes, cumulative emissions would be 7.4 GtC, i.e., 10 times higher. Because this sink function may be discontinued in the future due to climate-change, ending deforestation and lowering wood harvest emerge here as key climate-change mitigation strategies.

服务人员 王璐

服务院士 蒋有绪

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