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Description

This dataset provides atmospheric concentrations of CO2, CH4, CO, and N2O measured by the Harvard Quantum Cascade Laser System (QCLS) instruments during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. The QCLS (DUAL and CO2) instrument package contains two separate optical assemblies and calibration systems, and a common data system and power supply. The QCLS DUAL instrument simultaneously measures CO, CH4, and N2O concentrations, in situ, using two thermoelectrically cooled pulsed-quantum cascade lasers light sources, a multiple pass absorption cell, and two liquid nitrogen-cooled solid-state detectors. The QCLS CO2 instrument measures CO2 concentrations in situ using a thermoelectrically cooled pulsed-quantum cascade laser light source, gas cells, and liquid nitrogen cooled solid-state detectors. The CO2 mixing ratio of air flowing through the sample gas cell is determined by measuring absorption from a single infrared transition line at 4.32 microns relative to a reference gas of known concentration.

Product Summary

Platforms
NASA DC-8
Instruments
INFRARED LASER SPECTROSCOPY
Projects
ATom
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2016-07-29 to 2018-05-21
Data Partner
THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) (ORNL_DAAC)
Concept ID
C2677114811-ORNL_CLOUD
Data State
COMPLETE
Number of Files/Granules
94
Processing Level
2
Published
Updated
Science Keywords
Nitrous Oxide ,
Atmospheric Carbon Monoxide ,
Atmospheric Carbon Dioxide ,
Methane

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Commane, R., Budney, J. W., Gonzalez ramos, Y., Sargent, M., Wofsy, S. C., & Daube, B. C. (2021). ATom: Measurements from the Quantum Cascade Laser System (QCLS), Version 2 (Version 2). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/1932 Date Accessed: 2026-10-07

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Publications Citing This Dataset

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Title Authors Year Referenced Datasets
Sea Spray Aerosol Over the Remote Oceans Has Low Organic Content
  • Lawler, Michael J., Schill, Gregory P., Brock, Charles A., Froyd, Karl D., Williamson, Christina, Kupc, Agnieszka, Murphy, Daniel M.
N<SUB>2</SUB>O Temporal Variability from the Middle Troposphere to the Middle Stratosphere Based on Airborne and Balloon-Borne Observations during the Period 1987-2018
  • Krysztofiak, Gisele, Catoire, Valery, Dudok de Wit, Thierry, Kinnison, Douglas E., Ravishankara, A. R., Brocchi, Vanessa, Atlas, Elliot, Bozem, Heiko, Commane, Roisin, DAmato, Francesco, Daube, Bruce, Diskin, Glenn S., Engel, Andreas, Friedl-Vallon, Felix, Hintsa, Eric, Hurst, Dale F., Hoor, Peter, Jegou, Fabrice, Jucks, Kenneth W., Kleinbohl, Armin, Kullmann, Harry, Kort, Eric A., McKain, Kathryn, Moore, Fred L., Obersteiner, Florian, Ramos, Yenny Gonzalez, Schuck, Tanja, Toon, Geoffrey C., Viciani, Silvia, Wetzel, Gerald, Williams, Jonathan, Wofsy, Steven C.
The MOPITT Version 9 CO product: sampling enhancements and validation
  • Deeter, Merritt, Francis, Gene, Gille, John, Mao, Debbie, Martinez-Alonso, Sara, Worden, Helen, Ziskin, Dan, Drummond, James, Commane, Roisin, Diskin, Glenn, McKain, Kathryn
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