OCO-2 lowermost troposphere partial column

This archive contains daily netcdf files with two vertically resolved partial columns from OCO-2: The LMT (lowermost troposphere) partial column contains the 5 levels nearest the Earth’s surface, and the U (upper) partial column contains the upper 15 levels (described in Kulawik et al., 2017). The bias correction of LMT was done by comparisons to aircraft observations using a similar process to the OCO-2 XCO2 bias correction (described in O’Dell et al., 2018). The LMT bias correction is described in detail in Kulawik et al. (2017, 2019). The U partial column is set by subtracting the bias-corrected LMT from the bias corrected XCO2 (with appropriate airmass factors). The LMT product contains screening additionally to XCO2. The LMT quality flag is found in lmt -> quality_flag, and all values contain good quality (0).