Document Type

Article

Publication Date

2021

DOI

10.3390/atmos12060680

Publication Title

Atmosphere

Volume

12

Issue

6

Pages

680 (1-21)

Abstract

Line-of-sight wind profiles are derived from Doppler shifts in infrared solar occultation measurements from the Atmospheric Chemistry Experiment Fourier transform spectrometers (ACE-FTS), the primary instrument on SCISAT, a satellite-based mission for monitoring the Earth’s atmosphere. Comparisons suggest a possible eastward bias from 20 m/s to 30 m/s in ACE-FTS results above 80 km relative to some datasets but no persistent bias relative to other datasets. For instruments operating in a limb geometry, looking through a wide range of altitudes, smearing of the Doppler effect along the line of sight can impact the measured signal, particularly for saturated absorption lines. Implications of Doppler effect smearing are investigated for forward model calculations and volume mixing ratio retrievals. Effects are generally small enough to be safely ignored, except for molecules having a large overhang in their volume mixing ratio profile, such as carbon monoxide.

Comments

© 2021 by the authors.

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Original Publication Citation

Boone, C. D., Steffen, J., Crouse, J., & Bernath, P. F. (2021). Line-of-sight winds and doppler effect smearing in ACE-FTS solar occultation measurements. Atmosphere, 12(6), 1-21, Article 680. https://doi.org/10.3390/atmos12060680

ORCID

0000-0002-1255-396X (Bernath)

Download

Share

COinS