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注意差距:从地球观测和国家报告中协调热带森林碳流估计需要透明度

Viola Heinrich^1,2,3, Jo House⁴, David A Gibbs⁵

¹School of Geographical Sciences, University of Bristol, Bristol, UK. viola.heinrich@gfz-potsdam.de.

Carbon balance and management

|November 20, 2023

概括

全球地球观测 (EO) 数据集有助于协调国家温室气体库存对森林碳流量的差异. 调整巴西的EO数据显著改善了协议,强调了报告碳排放和吸收的透明度的必要性.

科学领域:

环境科学环境科学
气候科学气候科学
遥感遥感遥感遥感

背景情况:

从土地上产生的人为碳净流量的估计有很大差异,这是由于对森林管理的定义和核算方法的差异.
全球地球观测 (EO) 数据集为估计森林碳流提供了一种一致的方法,这对于与国家温室气体库存 (NGHGI) 相比进行独立验证非常有价值.

研究的目的:

将来自全球EO数据集的森林碳流估计与NGHGI报告的森林碳流估计进行比较.
评估不同方法,特别是"管理森林"的定义对碳流量估计的影响.
支持森林碳排放和吸收的准确及及时测量,报告和验证 (MRV).

主要方法:

利用全球EO数据集来描述土地覆盖面和碳库存的时空变化.
对比EO衍生的森林碳流估计与巴西,印度尼西亚和马来西亚 (2001-2020) 的NGHGI数据.
根据NGHGI的定义和方法调整了EO数据集,特别是针对巴西的管理森林,以评估可比性.

主要成果:

巴西的NGHGI报告了净碳来源 (+0.8 GtCO2yr-1),而EO数据显示了2001-2020年间的净沉降 (-0.2 GtCO2yr-1).
使用NGHGI定义对巴西的EO估计进行调整,使估计与估计相协调,显示可比净来源为+0.6 GtCO2yr-1.
印度尼西亚在EO和NGHGI之间显示了类似的净流量估计 (+0.6 GtCO2yr-1),而马来西亚在数量和标志上有所不同 (NGHGI: -0.2 GtCO2yr-1;EO: +0.2 GtCO2yr-1).

结论:

调整EO数据以符合NGHGI定义显著提高了可比性,解释了巴西森林碳流中的初始差异.
印尼和马来西亚的差异突出了不同的方法,不确定性和数据限制 (例如,缺乏空间显式森林类型数据) 的影响.
加强方法和数据的透明度,正如"巴黎协定"所鼓励的那样,对于调整独立验证方法和改善MRV至关重要.

关键词:

在二氧化碳的流量.碳预算碳预算碳预算地球观测地球观测地球观测森林森林森林森林库存库存库存在线一个叫做LULUCF的人.管理的土地代理.移除因子的移除因子透明度透明度透明度

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