Articles | Volume 19, issue 7
https://doi.org/10.5194/amt-19-2529-2026
https://doi.org/10.5194/amt-19-2529-2026
Research article
 | 
16 Apr 2026
Research article |  | 16 Apr 2026

Spatio-temporal pattern analysis of MOPITT total column CO using varimax rotation and singular spectrum analysis

John McKinnon, Chayan Roychoudhury, Avelino Arellano Jr., and Benjamin Gaubert

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Cited articles

Andela, N., Morton, D. C., Giglio, L., Chen, Y., van der Werf, G. R., Kasibhatla, P. S., DeFries, R. S., Collatz, G. J., Hantson, S., Kloster, S., Bachelet, D., Forrest, M., Lasslop, G., Li, F., Mangeon, S., Melton, J. R., Yue, C., and Randerson, J. T.: A human-driven decline in global burned area, Science, 356, 1356–1362, https://doi.org/10.1126/science.aal4108, 2017. a
Arneth, A., Monson, R. K., Schurgers, G., Niinemets, Ü., and Palmer, P. I.: Why are estimates of global terrestrial isoprene emissions so similar (and why is this not so for monoterpenes)?, Atmos. Chem. Phys., 8, 4605–4620, https://doi.org/10.5194/acp-8-4605-2008, 2008. a
Atkinson, R.: Atmospheric chemistry of VOCs and NOx, Atmospheric Environment, 34, 2063–2101, https://doi.org/10.1016/S1352-2310(99)00460-4, 2000. a
Barret, B., Loicq, P., Le Flochmoën, E., Bennouna, Y., Hadji-Lazaro, J., Hurtmans, D., and Sauvage, B.: Validation of 12 years (2008–2019) of IASI-A CO with IAGOS aircraft observations, Atmos. Meas. Tech., 18, 129–149, https://doi.org/10.5194/amt-18-129-2025, 2025. a
Bennani, M. and Braconnier, T.: Stopping criteria for eigensolvers, CERFACS, Toulouse, France, Tech. Rep. TR/PA/94/22, https://www.researchgate.net/profile/Thierry-Braconnier/publication/2793730_Stopping_Criteria_for_Eigensolvers/links/09e415136fcc9a48dd000000/Stopping-Criteria-for-Eigensolvers.pdf (last access: 7 April 2026), 1994. a
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We use a statistical method called Empirical Orthogonal Function (EOF) analysis to analyze complex data, focusing on its strengths and limitations. This method is widely used in climate research, but its use in atmospheric chemistry is relatively new.  While EOF analysis can be powerful, it may not be suitable for datasets that do not follow specific statistical assumptions. Our research provides recommendations to improve how we use this technique in analyzing atmospheric chemistry data.
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