A global gridded CO2 flux dataset inferred from OCO-2 retrievals using the GONGGA inversion system (v2024)

Data Description Here we provide a global monthly CO2 flux dataset at 1° × 1° spatial resolution for the period 2014.9-2023.12. The dataset is generated using the GONGGA (Global ObservatioN-based system for monitoring Greenhouse GAs) inversion system by assimilating OCO-2 (Observing Carbon Observatory 2) v11.1r column CO2 retrievals that scaled to the WMO X2019 standard. The dataset contains fluxes from biosphere (Net Ecosystem Exchange, NEE) (both prior and posterior), ocean (both prior and posterior), biomass burning emissions and fossil fuel emissions. We also provide the posterior model simulated values corresponding to all measurements contained in the lastest release of NOAA’s ObsPack database (obspack_co2_1_GLOBALVIEWplus_v9.1_2023-12-08 and obspack_co2_1_NRT_v9.2_2024-03-25). Change from v2023 Assimilation of OCO-2 v11.1r retrievals Update of prior fluxes Data version specification v202x.ori refers to original GONGGA flux data with 3-hourly time resolution and 2° latitude × 2.5° longitude spatial resolution, v202x refers to GONGGA flux data resampled to monthly time resolution and 1° latitude × 1° longitude spatial resolution for facilitating comparisons with other GCP inversion results. Article citation Jin, Z., Wang, T., Zhang, H., Wang, Y., Ding, J., Tian, X., Constraint of satellite CO2 retrieval on the global carbon cycle from a Chinese atmospheric inversion system. Science China Earth Sciences, 2023, 66: 609-618, doi: 10.1007/s11430-022-1036-7. Jin, Z., Tian, X., Wang, Y., Zhang, H., Zhao, M., Wang, T., Ding, J., and Piao, S.: A global surface CO2 flux dataset (2015–2022) inferred from OCO-2 retrievals using the GONGGA inversion system, Earth System Science Data, 2024, 16: 2857-2876, doi: 10.5194/essd-16-2857-2024.数据集说明 本数据集提供2014年9月至2023年12月期间、空间分辨率为1°×1°的全球月度二氧化碳（CO₂）通量数据。本数据集基于GONGGA（Global ObservatioN-based system for monitoring Greenhouse GAs，全球观测型温室气体监测反演系统）反演系统生成，通过同化匹配世界气象组织（World Meteorological Organization, WMO）X2019标准的OCO-2（Observing Carbon Observatory 2，碳观测卫星2号）v11.1r版柱体二氧化碳反演数据得到。数据集涵盖生物圈通量（包括先验与后验的生态系统净交换（Net Ecosystem Exchange, NEE））、海洋通量（包括先验与后验）、生物质燃烧排放以及化石燃料排放通量。 本数据集还提供与美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）最新版ObsPack数据库（包含obspack_co2_1_GLOBALVIEWplus_v9.1_2023-12-08与obspack_co2_1_NRT_v9.2_2024-03-25）中所有观测值对应的后验模型模拟值。 相较于v2023版本的更新： 1. 同化OCO-2 v11.1r版反演数据 2. 先验通量更新 数据版本说明 v202x.ori指时间分辨率为3小时、空间分辨率为2°纬度×2.5°经度的原始GONGGA通量数据；v202x指为便于与其他全球碳计划（Global Carbon Project, GCP）反演结果进行对比，经重采样得到的时间分辨率为月度、空间分辨率为1°纬度×1°经度的GONGGA通量数据。 论文引用 1. 金臻, 王涛, 张焕, 等. 基于中国大气反演系统的卫星CO₂反演对全球碳循环的约束[J]. "Science China Earth Sciences", 2023, 66: 609-618. doi: 10.1007/s11430-022-1036-7. 2. Jin Z, Tian X, Wang Y, 等. 基于GONGGA反演系统与OCO-2反演数据推导的全球地表CO₂通量数据集（2015–2022）[J]. "Earth System Science Data", 2024, 16: 2857-2876. doi: 10.5194/essd-16-2857-2024.