Version 1 Pilot top-down CO2 Budget constrained by the v10 OCO-2 MIP

This is a pilot dataset of country-specific net carbon exchange (NCE) and terrestrial carbon stock changes aimed at informing countries’ carbon budgets. These estimates are based on “top-down” NCE outputs from version 10 of the Orbiting Carbon Observatory (OCO-2) modeling intercomparison project (MIP), wherein an ensemble of inverse modeling groups conducted standardized experiments assimilating OCO-2 column-averaged dry-air mole fraction (XCO2) retrievals, in situ CO2 measurements, or combinations of these data. The OCO-2 MIP NCE estimates are combined with “bottom-up” estimates of fossil fuel emissions and lateral carbon fluxes to estimate changes in terrestrial carbon stocks, which are impacted by anthropogenic and natural drivers. These flux estimates are reported annually (2015-2020) as both a global 1ox1o gridded dataset and as a country-level dataset.

本数据集为针对特定国家的净碳交换（net carbon exchange, NCE）与陆地碳储量变化的试点数据集，旨在为各国碳预算制定提供参考依据。上述估算基于轨道碳观测卫星2号（Orbiting Carbon Observatory-2, OCO-2）模式比较计划（modeling intercomparison project, MIP）第10版本的“自上而下”NCE输出结果。该计划中，多支反演模式团队开展标准化实验，同化OCO-2柱平均干空气摩尔分数（column-averaged dry-air mole fraction, XCO2）反演产品、原位CO2测量数据，或二者的组合数据集。研究人员将OCO-2 MIP的NCE估算结果与化石燃料排放、横向碳通量的“自下而上”估算结果相结合，以此估算受人为与自然驱动因子共同影响的陆地碳储量变化。该通量估算结果涵盖2015-2020年的年度数据，同时提供全球1°×1°网格化数据集与国家级数据集两种形式。

搜集汇总

背景与挑战

背景概述

该数据集提供了2015-2020年间全球网格和国家级别的CO2通量数据，结合了自上而下的CO2反演和自下而上的化石燃料排放估计。数据集包括年度净陆地-大气CO2通量、化石燃料排放估计以及陆地碳储量变化，旨在支持全球碳预算评估和决策制定。