Global land 1° mapping XCO2 dataset using satellite observations of GOSAT and OCO-2 from 2009 to 2020

The global 1° land mapping XCO2 dataset (Mapping-XCO2) is derived from satellite XCO2 retrievals of GOSAT and OCO-2 spanning the period of April 2009 to December 2020. The data product is provided in GeoTIFF format and include two temporal resolutions: 3 days and month. The 3-day data files include gridded XCO2 and mapping uncertainty, which are named like “MappingXCO2_Date.nc” and “MappingUncertainty_Date.nc”. The flag “Date” is defined as date ID of 1426 time-units started from 20 April 2009. The monthly data files only include XCO2 data and named like “MappingXCO2_YYYY_MM.tif”. The number of “YYYY” and “MM” represent year and month, respectively. The domain of the dataset covers global land ranging from 56° S to 65° N and 169° W to 180° E. The spatial reference of the dataset is Geographic Lat/Lon. The unit of XCO2 data is ppm while the nodata values were assigned to NaN.

全球1°分辨率陆地制图XCO₂数据集（Mapping-XCO2）源自2009年4月至2020年12月期间GOSAT与OCO-2卫星的XCO₂反演数据。该数据产品采用GeoTIFF格式存储，包含两种时间分辨率：3天尺度与月尺度。其中3天分辨率的数据文件包含网格化XCO₂数据及其制图不确定性，文件命名格式分别为"MappingXCO2_Date.nc"与"MappingUncertainty_Date.nc"，其中"Date"为时间单元的日期编号，共计1426个时间单元，起始时间为2009年4月20日。月度数据文件仅包含XCO₂数据，命名格式为"MappingXCO2_YYYY_MM.tif"，其中"YYYY"与"MM"分别代表年份与月份。该数据集的覆盖范围为全球陆地区域，纬度跨度为南纬56°至北纬65°，经度跨度为西经169°至东经180°。数据集的空间参考为地理经纬度（Geographic Lat/Lon）。XCO₂数据的单位为ppm，无数据值被赋值为NaN。