A Global 1 Degree by 1 Degree Distribution of Atmospheric/Soil CO2 Consumption by Continental Weathering and of Riverine HCO3 Yield (DB1012)

The mission of the Centre National de la Recherche Scientifique (CNRS) of Strasbourg Cedex, France is to study "The Global Carbon Cycle and its Perturbation by Man and Climate, the Terrestrial Biosphere". With the support of the Environment Programme of the European Communities, modeling of the spatial distribution of atmospheric-soil CO2 consumption by chemical weathering of continental rocks have been and are being conducted. One of the major results of these studies is a set of global maps which show the distribution of CO2 consumption (FCO2) and the transport of bicarbonate (FHCO3-) from rivers to the ocean, each in moles per kilometer squared per year (mol km2/yr). Continental weathering influences the geologic carbon cycle (Trabalka, 1985). The largest natural exchange fluxes of carbon occur between the atmosphere and the terrestrial biota, and between the atmosphere and the ocean surface waters (Houghton, et. al. 1990). River carbon input to the oceans is a component of the estimate of global air-sea CO2 fluxes (Sarminento and Sundquist 1992). It is estimated that about 0.3 gigatons of carbon per year (GtC/yr) are consumed by the chemical erosion of continental rocks and transferred as HCO3- to the oceans (Berner et. al. 1983; Meybeck 1987; and Probst 1992), while the flux of particulate and dissolved organic carbon transported by rivers to the oceans is estimated to be about 0.4 GtC/yr (Probst 1992). On the whole, about 0.7 GtC/yr are transferred by continental erosion from the soil-biosphere reservoir to the oceans. A model developed by Amiotte Suchet and Probst (1993) calculates the flux of atmospheric-soil CO2 consumed by the chemical erosion of continental rock (i.e., rock weathering) and the bicarbonate river transfer to the ocean. This model is based on a set of empirical relationships between FCO2 and the drainage (runoff) on the major rock types outcropping on the continents. The model assumes that the consumption of atmospheric CO2 by continental weathering is primarily influenced by drainage, and the different types of rocks outcropping the continents. This data base contains estimates of the net flux of atmospheric-soil CO2 (FCO2) produced by the Amiotte Suchet and Probst model and the associated bicarbonate river flux (FHCO3-). These variables are referenced to a 1 degree latitude by 1 degree longitude world grid. The grid contains 64,800 records (i.e. grid cells) originating at -180 degrees West longitude by -90 degrees North latitude, and extending to 180 degrees West longitude by 90 degrees North latitude. For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/ndps/db1012.html This dataset was transferred from the CDIAC Archive and published on ESS-DIVE in 2018 under the project title "Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (USA); Centre National de la Recherche Scientifique, Center de Geochimie de la Surface, Strasbourg Cedex, France". In 2023, the project title was updated to "Carbon Dioxide Information Analysis Center (CDIAC); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)" to enable consistent management of all datasets previously hosted by the CDIAC Archive that are now published on ESS-DIVE.

法国斯特拉斯堡塞德的法国国家科学研究中心（Centre National de la Recherche Scientifique, CNRS）的研究使命为探究“全球碳循环及其受人类活动与气候扰动的影响、陆地生物圈”。在欧洲共同体环境计划的支持下，研究团队已启动并持续开展大陆岩石化学风化作用下大气-土壤CO₂消耗的空间分布模拟工作。该系列研究的核心成果之一为一套全球空间分布图集，展示了CO₂消耗通量（FCO₂）以及河流向海洋输送的碳酸氢盐（FHCO₃⁻）的空间分布，单位均为摩尔每平方千米每年（mol·km⁻²·yr⁻¹）。

大陆风化作用对地质碳循环具有重要影响（Trabalka, 1985）。全球规模最大的自然碳交换通量分别发生在大气与陆地生物群之间，以及大气与海洋表层水体之间（Houghton et al., 1990）。河流向海洋输入的碳组分是全球海-气CO₂通量估算的重要组成部分（Sarmiento与Sundquist, 1992）。据估算，每年约有0.3吉吨碳（GtC/yr）通过大陆岩石化学侵蚀被消耗，并以HCO₃⁻形式输送至海洋（Berner et al., 1983; Meybeck, 1987; Probst, 1992）；而河流输送至海洋的颗粒态与溶解态有机碳通量约为0.4 GtC/yr（Probst, 1992）。总体而言，每年约有0.7 GtC/yr通过大陆侵蚀作用从土壤-生物圈储库输送至海洋。

Amiotte Suchet与Probst（1993）开发的模型可计算大陆岩石化学侵蚀（即岩石风化）消耗的大气-土壤CO₂通量，以及河流向海洋输送的碳酸氢盐通量。该模型基于大陆出露主要岩石类型的径流（runoff）与FCO₂之间的一系列经验关系构建，假设大陆风化对大气CO₂的消耗主要受径流以及大陆出露的不同岩石类型影响。

本数据集包含由Amiotte Suchet和Probst模型估算得到的大气-土壤CO₂净通量（FCO₂）以及对应的河流碳酸氢盐输送通量（FHCO₃⁻）。这些变量以1°纬度×1°经度的全球网格为空间参考基准。该网格共包含64800条记录（即网格单元），其范围西经-180°、南纬90°起，至西经180°、北纬90°止。

如需获取数据文件，请点击此链接访问CDIAC数据转换网站：http://cdiac.ess-dive.lbl.gov/ndps/db1012.html

本数据集由二氧化碳信息分析中心（Carbon Dioxide Information Analysis Center, CDIAC）档案库迁移而来，并于2018年发布于ESS-DIVE，原项目标题为"Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (USA); Centre National de la Recherche Scientifique, Center de Geochimie de la Surface, Strasbourg Cedex, France"。2023年，为统一管理此前由CDIAC档案库托管、现发布于ESS-DIVE的所有数据集，项目标题更新为"Carbon Dioxide Information Analysis Center (CDIAC); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)"。