Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published August 25, 2014 | Draft
Report Open

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

Files

Shia_2013_1-line_Jan7.pdf
Files (493.6 kB)
Name Size Download all
md5:d97a26fbe817d76b92a2486f800b558d
493.6 kB Preview Download

Additional details

Created:
August 22, 2023
Modified:
October 17, 2023