Comparisons of the Orbiting Carbon Observatory-2 (OCO-2) X$_{CO_{2}}$ measurements with TCCON
- Wunch, D.
- Wennberg, P. O.
- Osterman, G.
- Fisher, B.
- Naylor, B.
- Roehl, M. C.
- O’Dell, C.
- Mandrake, L.
- Viatte, C.
- Kiel, M.
- Griffith, D. W. T.
- Deutscher, N. M.
- Velazco, V. A.
- Notholt, J.
- Warneke, T.
- Petri, C.
- Maziere, M. De
- Sha, M. K.
- Sussmann, R.
- Rettinger, M.
- Pollard, D.
- Robinson, J.
- Morino, I.
- Uchino, O.
- Hase, F.
- Blumenstock, T.
- Feist, D. G.
- Arnold, S. G.
- Strong, K.
- Mendonca, J.
- Kivi, R.
- Heikkinen, P.
- Iraci, L.
- Podolske, J.
- Hillyard, P.
- Kawakami, S.
- Dubey, M. K.
- Parker, H. A.
- Sepulveda, E.
- García, O. E.
- Te, Y.
- Jeseck, P.
- Gunson, M. R.
- Crisp, D.
- Eldering, A.
DOIAbstract
NASA\u27s Orbiting Carbon Observatory-2 (OCO-2) has been measuring carbon dioxide column-averaged dry-air mole fraction, X$_{CO_{2}}$, in the Earth\u27s atmosphere for over 2 years. In this paper, we describe the comparisons between the first major release of the OCO-2 retrieval algorithm (B7r) and X$_{CO_{2}}$ from OCO-2\u27s primary ground-based validation network: the Total Carbon Column Observing Network (TCCON). The OCO-2 X$_{CO_{2}}$ retrievals, after filtering and bias correction, agree well when aggregated around and coincident with TCCON data in nadir, glint, and target observation modes, with absolute median differences less than 0.4 ppm and RMS differences less than 1.5 ppm. After bias correction, residual biases remain. These bi...
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