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Cited by 73Atmospheric and Environmental Gas DynamicsSpectroscopy and Laser ApplicationsCalibration and Measurement Techniques

Assessment of errors and biases in retrievals of X CO 2 , X CH 4 , X CO , and X N 2 O from a 0.5 cm –1 resolution solar-viewing spectrometer

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Hedelius, Jacob K., Viatte, Camille, Wunch, Debra, Roehl, Coleen M., Toon, Geoffrey C., Chen, Jia, Jones, Taylor, Wofsy, Steven C. +4 more·2016·Atmospheric Measurement Techniques
DOI 10.5194/amt-9-3527-2016

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Abstract

Abstract. Bruker™ EM27/SUN instruments are commercial mobile solar-viewing near-IR spectrometers. They show promise for expanding the global density of atmospheric column measurements of greenhouse gases and are being marketed for such applications. They have been shown to measure the same variations of atmospheric gases within a day as the high-resolution spectrometers of the Total Carbon Column Observing Network (TCCON). However, there is little known about the long-term precision and uncertainty budgets of EM27/SUN measurements. In this study, which includes a comparison of 186 measurement days spanning 11 months, we note that atmospheric variations of Xgas within a single day are well captured by these low-resolution instruments, but over several months, the measurements drift noticeably. We present comparisons between EM27/SUN instruments and the TCCON using GGG as the retrieval algorithm. In addition, we perform several tests to evaluate the robustness of the performance and determine the largest sources of errors from these spectrometers. We include comparisons of XCO2, XCH4, XCO, and XN2O. Specifically we note EM27/SUN biases for January 2015 of 0.03, 0.75, –0.12, and 2.43 % for XCO2, XCH4, XCO, and XN2O respectively, with 1σ running precisions of 0.08 and 0.06 % for XCO2 and XCH4 from measurements in Pasadena. We also identify significant error caused by nonlinear sensitivity when using an extended spectral range detector used to measure CO and N2O.

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Authors
Hedelius, J. K., Viatte, C., Wunch, D., Roehl, C. M., Toon, G. C., Chen, J., Jones, T., Wofsy, S. C., Franklin, J. E., Parker, H., Dubey, M. K., & Wennberg, P. O.
Affiliations
  • California Institute of Technology (US)
  • Harvard University (US)
  • Dalhousie University (CA)
  • Los Alamos National Laboratory (US)
Corresponding author
  • Hedelius, Jacob K.
  • Viatte, Camille
  • Wunch, Debra
  • Roehl, Coleen M.
  • Toon, Geoffrey C.
  • Chen, Jia
  • Jones, Taylor
  • Wofsy, Steven C.
  • Franklin, Jonathan E.
  • Parker, Harrison
  • Dubey, Manvendra K.
  • Wennberg, Paul O.
ORCID
Venue
Atmospheric Measurement Techniques
Publisher
Copernicus GmbH
Published
2016-08-03
Volume
9
Issue
8
Pages
3527-3546
ISSN
  • 1867-1381 (ISSN-L)
  • 1867-8548
DOI
10.5194/amt-9-3527-2016
OpenAlex
W2290041822
Cited by
73
References
1
Citations by year
2026: 1 · 2025: 5 · 2024: 13 · 2023: 8 · 2022: 15 · 2021: 9 · 2020: 5 · 2019: 6 · 2018: 3 · 2017: 5 · 2016: 3
FWCI
4.20
Type
journal article
Language
en
Open access
Licence
Locations
  • Atmospheric measurement techniques (publishedVersion, cc-by)
  • mediaTUM (Technical University of Munich) (submittedVersion, cc-by)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • Jet Propulsion Laboratory (1517180)
  • National Aeronautics and Space Administration (NNX14AI60G, CMS2013)
  • Los Alamos National Laboratory (20110081DR)
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
  • Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
  • Physical Sciences › Engineering › Aerospace Engineering › Calibration and Measurement Techniques
Keywords
measurement bias, retrieval precision, uncertainty budget, XCO2, XCH4, Xcos, nonlinear sensitivity, long-term drift

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