Assessing temporal clear-sky errors in assimilation of satellite CO2 retrievals using a global transport model
Item
Title (Dublin Core)
Assessing temporal clear-sky errors in assimilation of satellite CO2 retrievals using a global transport model
Description (Dublin Core)
The Orbiting Carbon Observatory (OCO) and the Greenhouse gases Observing SATellite (GOSAT) will make global observations of the total column dry-air mole fraction of atmospheric CO<sub>2</sub> (<i>X</i><sub>CO<sub>2</sub></sub>) starting in 2008. Although satellites have global coverage, <i>X</i><sub>CO<sub>2</sub></sub> retrievals will be made only a few times each month over a given location and will only be sampled in clear conditions. Modelers will use <i>X</i><sub>CO<sub>2</sub></sub> in atmospheric inversions to estimate carbon sources and sinks; however, if satellite measurements are used to represent temporal averages, modelers may incur temporal sampling errors. We investigate these errors using a global transport model. Temporal sampling errors vary with time and location, exhibit spatially coherent patterns, and are greatest over land and during summer. These errors often exceed 1 ppm and must be addressed in a data assimilation system by correct simulation of synoptic CO<sub>2</sub> variations associated with cloud systems.
Creator (Dublin Core)
Corbin, K. D.
Denning, A. S.
Parazoo, N. C.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-9-3043-2009
https://acp.copernicus.org/articles/9/3043/2009/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
