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Open AccessArticle

Vertical Distribution of Arctic Methane in 2009–2018 Using Ground-Based Remote Sensing

1
Finnish Meteorological Institute, 99600 Sodankylä, Finland
2
Finnish Meteorological Institute, 00560 Helsinki, Finland
3
Centre for Isotope Research, Energy and Sustainability Research Institute Groningen, University of Groningen, 9747 AG Groningen, The Netherlands
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(6), 917; https://doi.org/10.3390/rs12060917
Received: 31 January 2020 / Revised: 2 March 2020 / Accepted: 10 March 2020 / Published: 12 March 2020
(This article belongs to the Section Atmosphere Remote Sensing)
We analyzed the vertical distribution of atmospheric methane (CH 4 ) retrieved from measurements by ground-based Fourier Transform Spectrometer (FTS) instrument in Sodankylä, Northern Finland. The retrieved dataset covers 2009–2018. We used a dimension reduction retrieval method to extract the profile information, since each measurement contains around three pieces of information about the profile shape between 0 and 40 km. We compared the retrieved profiles against Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) satellite measurements and AirCore balloon-borne profile measurements. Additional comparison at the lowest tropospheric layer was done against in-situ measurements from a 50-m-high mast. In general, the ground-based FTS and ACE-FTS profiles agreed within 10% below 20 km and within 30% in the stratosphere between 20 and 40 km. Our method was able to accurately capture reduced methane concentrations inside the polar vortex in the Arctic stratosphere. The method produced similar trend characteristics as the reference instruments even when a static prior profile was used. Finally, we analyzed the time series of the CH 4 profile datasets and estimated the trend using the dynamic linear model (DLM). View Full-Text
Keywords: arctic methane; vertical profiles; growth rate; ground-based remote sensing; Fourier Transform Spectrometer; TCCON; dynamic linear model arctic methane; vertical profiles; growth rate; ground-based remote sensing; Fourier Transform Spectrometer; TCCON; dynamic linear model
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MDPI and ACS Style

Karppinen, T.; Lamminpää, O.; Tukiainen, S.; Kivi, R.; Heikkinen, P.; Hatakka, J.; Laine, M.; Chen, H.; Lindqvist, H.; Tamminen, J. Vertical Distribution of Arctic Methane in 2009–2018 Using Ground-Based Remote Sensing. Remote Sens. 2020, 12, 917. https://doi.org/10.3390/rs12060917

AMA Style

Karppinen T, Lamminpää O, Tukiainen S, Kivi R, Heikkinen P, Hatakka J, Laine M, Chen H, Lindqvist H, Tamminen J. Vertical Distribution of Arctic Methane in 2009–2018 Using Ground-Based Remote Sensing. Remote Sensing. 2020; 12(6):917. https://doi.org/10.3390/rs12060917

Chicago/Turabian Style

Karppinen, Tomi; Lamminpää, Otto; Tukiainen, Simo; Kivi, Rigel; Heikkinen, Pauli; Hatakka, Juha; Laine, Marko; Chen, Huilin; Lindqvist, Hannakaisa; Tamminen, Johanna. 2020. "Vertical Distribution of Arctic Methane in 2009–2018 Using Ground-Based Remote Sensing" Remote Sens. 12, no. 6: 917. https://doi.org/10.3390/rs12060917

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