Tsuruta, Aki; Aalto, Tuula; Backman, Leif; Peters, Wouter; Krol, Maarten; van der Laan-Luijkx, Ingrid T.; Hatakka, Juha; Heikkinen, Pauli; Dlugokencky, Edward J.; Spahni, Renato; Paramonova, Nina N. (2015). Evaluating atmospheric methane inversion model results for Pallas, northern Finland. Boreal Environment Research, 20(4), pp. 506-525. Boreal Environment Research Publishing Board
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A state-of-the-art inverse model, CarbonTracker Data Assimilation Shell (CTDAS), was used to optimize estimates of methane (CH4) surface fluxes using atmospheric observations of CH4 as a constraint. The model consists of the latest version of the TM5 atmospheric chemistry-transport model and an ensemble Kalman filter based data assimilation system. The model was constrained by atmospheric methane surface concentrations, obtained from
the World Data Centre for Greenhouse Gases (WDCGG). Prior methane emissions were specified for five sources: biosphere, anthropogenic, fire, termites and ocean, of which bio-sphere and anthropogenic emissions were optimized. Atmospheric CH
4
mole fractions for
2007 from northern Finland calculated from prior and optimized emissions were compared
with observations. It was found that the root mean squared errors of the posterior esti
-
mates were more than halved. Furthermore, inclusion of NOAA observations of CH
4
from
weekly discrete air samples collected at Pallas improved agreement between posterior CH
4
mole fraction estimates and continuous observations, and resulted in reducing optimized
biosphere emissions and their uncertainties in northern Finland.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Climate and Environmental Physics 10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) |
UniBE Contributor: |
Spahni, Renato |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1797-2469 |
Publisher: |
Boreal Environment Research Publishing Board |
Language: |
English |
Submitter: |
Monika Wälti-Stampfli |
Date Deposited: |
02 Dec 2015 10:28 |
Last Modified: |
05 Dec 2022 14:50 |
BORIS DOI: |
10.7892/boris.73421 |
URI: |
https://boris.unibe.ch/id/eprint/73421 |
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