气候变化领域集成服务门户(CCPortal): Deforestation in Latin America in the 2000s predominantly occurred outside of typical mature forests

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DOI	10.1016/j.xinn.2024.100610
	Deforestation in Latin America in the 2000s predominantly occurred outside of typical mature forests
	Zhang, Zhiyu; Ni, Wenjian; Quegan, Shaun; Chen, Jingming; Gong, Peng; Rodriguez, Luiz Carlos Estraviz; Guo, Huadong; Shi, Jiancheng; Liu, Liangyun; Li, Zengyuan; He, Yating; Liu, Qinhuo; Shimabukuro, Yosio; Sun, Guoqing
发表日期	2024
ISSN	2666-6758
起始页码	5
结束页码	3
卷号	5 期号:3
英文摘要	The role of tropical forests in the global carbon budget remains controversial, as carbon emissions from deforestation are highly uncertain. This high uncertainty arises from the use of either fixed forest carbon stock density or maps generated from satellite -based optical re flectance with limited sensitivity to biomass to generate accurate estimates of emissions from deforestation. New space missions aiming to accurately map the carbon stock density rely on direct measurements of the spatial structures of forests using lidar and radar. We found that lost forests are special cases, and their spatial structures can be directly measured by combining archived data acquired before and after deforestation by space missions principally aimed at measuring topography. Thus, using biomass mapping, we obtained new estimates of carbon loss from deforestation ahead of forthcoming space missions. Here, using a high -resolution map of forest loss and the synergy of radar and lidar to estimate the aboveground biomass density of forests, we found that deforestation in the 2000s in Latin America, one of the severely deforested regions, mainly occurred in forests with a significantly lower carbon stock density than typical mature forests. Deforestation areas with carbon stock densities lower than 20.0, 50.0, and 100.0 Mg C/ha accounted for 42.1%, 62.0%, and 83.3% of the entire deforested area, respectively. The average carbon stock density of lost forests was only 49.13 Mg C/ha, which challenges the current knowledge on the carbon stock density of lost forests (with a default value 100 Mg C/ha according to the Intergovernmental Panel on Climate Change Tier 1 estimates, or approximately 112 Mg C/ha used in other studies). This is demonstrated over both the entire region and the footprints of the spaceborne lidar. Consequently, our estimate of carbon loss from deforestation in Latin America in the 2000s was 253.0 +/- 21.5 Tg C/year, which was considerably less than existing remote -sensing -based estimates, namely 400 -600 Tg C/year. This indicates that forests in Latin America were most likely not a net carbon source in the 2000s compared to established carbon sinks. In previous studies, considerable effort has been devoted to rectify the underestimation of carbon sinks; thus, the overestimation of carbon emissions should be given sufficient consideration in global carbon budgets. Our results also provide solid evidence for the necessity of renewing knowledge on the role of tropical forests in the global carbon budget in the future using observations from new space missions.
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001218390400001
来源期刊	INNOVATION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305829
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; University of Sheffield; University of Toronto; University of Hong Kong; Universidade de Sao Paulo; Chinese Academy of Sciences; National Space Science Center, CAS; Chinese Academy of Forestry; Research Institute of Forest Resources Information Technique, CAF; Chinese Academy of Forestry; University System of Maryland; University of Maryland College Park
推荐引用方式 GB/T 7714	Zhang, Zhiyu,Ni, Wenjian,Quegan, Shaun,et al. Deforestation in Latin America in the 2000s predominantly occurred outside of typical mature forests[J],2024,5(3).
APA	Zhang, Zhiyu.,Ni, Wenjian.,Quegan, Shaun.,Chen, Jingming.,Gong, Peng.,...&Sun, Guoqing.(2024).Deforestation in Latin America in the 2000s predominantly occurred outside of typical mature forests.INNOVATION,5(3).
MLA	Zhang, Zhiyu,et al."Deforestation in Latin America in the 2000s predominantly occurred outside of typical mature forests".INNOVATION 5.3(2024).