Articles | Volume 16, issue 24
https://doi.org/10.5194/amt-16-6065-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-16-6065-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Performance and sensitivity of column-wise and pixel-wise methane retrievals for imaging spectrometers
Alana K. Ayasse
CORRESPONDING AUTHOR
Carbon Mapper Inc., Pasadena, CA 91101, USA
Daniel Cusworth
Carbon Mapper Inc., Pasadena, CA 91101, USA
Kelly O'Neill
Carbon Mapper Inc., Pasadena, CA 91101, USA
Justin Fisk
Carbon Mapper Inc., Pasadena, CA 91101, USA
Andrew K. Thorpe
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
Riley Duren
Carbon Mapper Inc., Pasadena, CA 91101, USA
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
Arizona Institutes for Resilience, University of Arizona, Tucson, AZ 85721, USA
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Berend J. Schuit, Joannes D. Maasakkers, Pieter Bijl, Gourav Mahapatra, Anne-Wil van den Berg, Sudhanshu Pandey, Alba Lorente, Tobias Borsdorff, Sander Houweling, Daniel J. Varon, Jason McKeever, Dylan Jervis, Marianne Girard, Itziar Irakulis-Loitxate, Javier Gorroño, Luis Guanter, Daniel H. Cusworth, and Ilse Aben
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The AVIRIS-NG hyperspectral imager has been used successfully to identify and quantify anthropogenic methane sources utilizing different retrieval and inversion methods. Here, we examine the adaption and application of the WFM-DOAS algorithm to AVIRIS-NG measurements to retrieve local methane column enhancements, compare the results with other retrievals, and quantify the uncertainties resulting from the retrieval method. Additionally, we estimate emissions from five detected methane plumes.
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Short summary
Methane is a powerful greenhouse gas, and a significant portion of methane comes from large individual plumes. Recently, airplane-mounted infrared technologies have proven very good at detecting and quantifying these plumes. In order to extract the methane signal from the infrared image, there are two widely used approaches. In this study, we assess the performance of both approaches using controlled-release experiments. We also examine the minimum detection limit of the infrared technology.
Methane is a powerful greenhouse gas, and a significant portion of methane comes from large...