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Global Satellite-Based Atmospheric Profiles from Atmospheric Chemistry Experiment SciSat Level 2 Processed Data, v5.2, 2004-2024

Description: The Atmospheric Chemistry Experiment is a satellite-based mission that has been probing the Earth's atmosphere via solar occultation since February 2004. The solar occultation approach provides global coverage over the order of a few months, with up to 30 occultations over limited latitude ranges on a given day. Instruments on board include a high-resolution Fourier transform spectrometer (ACE-FTS) measuring in the infrared (750-4400 cm-1) and a pair of filtered imagers operating at 1.02 and 0.525 µm. Level 2 data on a 1-km altitude grid from ACE-FTS processing version v5.2, spanning February 2004 to November 2024, are provided in this data set. The new processing version fixes issues observed for previous processing versions and updates the spectroscopic database to the most recent information. Three new data products are added: line of sight winds and volume mixing ratios for two molecules: HFC-32 (CH2F2) and HOCl. Forward model calculations are updated to account for the finite ACE-FTS field of view.

ACE SciSat Level 2 Processed Data, v5.2.
Temperature, Pressure and Volume Mixing Ratio (VMR) profiles as a function of altitude for many atmospherically relevant molecules:
H2O, O3, N2O, CO, CH4, NO, NO2, HNO3, HF, HCl, OCS, N2O5, ClONO2, HCN, CH3Cl, CF4, CFC-12 (CCl2F2), CFC-11 (CCl3F), COF2, COCl2, COClF, C2H6, C2H2, HCFC-22 (CHClF2), HCOOH, SF6, HO2NO2, H2O2, H2CO, CH3OH, CCl4, N2, O2, CFC-113 (Cl2FC-CClF2), HCFC-141b (Cl2FC-CH3), HCFC-142b (ClF2C-CH3), HFC-134a (F3C-CFH2), PAN (CH3C(O)OONO2), CHF3, acetone (C3H6O), SO2, CH3CN, ClO, CO2, HFC-32 (CH2F2), and HOCl, as well as isotopologues for some of these molecules and line of sight winds.

Imager (IMG) and geolocation (GLC) data are also included, as well as some selected residual spectra.

C. Boone, et al. Version 5 retrievals for ACE-FTS and ACE-imagers. Journal of Quantitative Spectroscopy and Radiative Transfer. 310, 108749 (2023). doi: 10.1016/j.jqsrt.2023.108749
Authors: Bernath, Peter F.; University of Waterloo; Old Dominion University; ORCID iD 0000-0002-1255-396X
Boone, Chris D.; University of Waterloo; ORCID iD 0000-0001-9041-8299
Lecours, Michael J.; University of Waterloo; ORCID iD 0000-0001-7810-0229
Crouse, Jeffrey; University of Waterloo; ORCID iD 0000-0002-8368-7367
Steffen, Johnathan; University of Waterloo; ORCID iD 0009-0003-9667-4658
Schmidt, Matthew; University of Waterloo; ORCID iD 0000-0002-8222-0933
Keywords: Fourier transform spectroscopy
Remote sensing
Atmospheric monitoring
CFCs
HCFCs
HFCs
Global
Ozone
Montreal Protocol
Field of Research: 
Earth and related environmental sciences
>
Atmospheric sciences
>
Atmospheric chemistry
Publication Date: 2025-04-07
Publisher: Federated Research Data Repository / dépôt fédéré de données de recherche
Funder: Canadian Space Agency; CSA Grant; 9F045-230412/001 SCISAT
URI: https://doi.org/10.20383/103.01245
Related Identifiers: 
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Access to this dataset is subject to the following terms:
Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Citation
Bernath, P., Boone, C., Lecours, M., Crouse, J., Steffen, J., Schmidt, M. (2025). Global Satellite-Based Atmospheric Profiles from Atmospheric Chemistry Experiment SciSat Level 2 Processed Data, v5.2, 2004-2024. Federated Research Data Repository. https://doi.org/10.20383/103.01245