Pressure Line Broadening and Feasibility of CO_2 Profile Retrieval using Near Infrared Observations of an Absorption Line
Abstract
Analytic expressions are derived for the transmittance and reflectance of sunlight and their Jacobians for an absorption line with Lorentz line broadening. Rodgers information analysis is applied to calculate the information content, the degrees of freedom and the averaging kernel for a simple atmospheric model to investigate the feasibility of retrieving the profile of CO_2 using near-infrared (NIR) measurements over a single absorption line. The results have implications for the design of future space instruments with high spectral resolution and high signal to noise ratios to obtain global scale information on the CO_2 vertical distribution which is important for inferring the sources, sinks, and transport of CO_2.
Additional Information
We thank Dr. J. Margolis for his valuable suggestions on the noise-resolution relation for instruments, Dr. V. Natraj for helpful comments and GOSAT retrieval data and Dr. S. Newman for her suggestions to improve the manuscript. This research is supported in part by the Orbiting Carbon Observatory 2 (OCO-2) project, a NASA Earth System Science Pathfinder (ESSP) mission and Project JPL.1382974 to the California Institute of Technology.Attached Files
Draft - Shia_2013_1-line_Jan7.pdf
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Additional details
- Alternative title
- Pressure Line Broadening and Feasibility of CO2 Profile Retrieval using Near Infrared Observations of an Absorption Line
- Eprint ID
- 48800
- Resolver ID
- CaltechAUTHORS:20140822-092102214
- NASA Orbiting Carbon Observatory 2 (OCO-2) Project
- JPL
- JPL.1382974
- Created
-
2014-08-25Created from EPrint's datestamp field
- Updated
-
2020-03-09Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)