Anthropogenic impact on arctic near-surface methane: observations and model simulations
Abstract Impact of climatically significant anthropogenic emissions to seasonal methane (CH4) variations observed at arctic and subarctic background stations in 1999 – 2019 has been quantitatively estimated using GEOS-Chem chemical transport model. It is shown that the formation of a stable continen...
| Published in: | IOP Conference Series: Earth and Environmental Science |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
IOP Publishing
2022
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1088/1755-1315/1040/1/012033 https://iopscience.iop.org/article/10.1088/1755-1315/1040/1/012033 https://iopscience.iop.org/article/10.1088/1755-1315/1040/1/012033/pdf |
| Summary: | Abstract Impact of climatically significant anthropogenic emissions to seasonal methane (CH4) variations observed at arctic and subarctic background stations in 1999 – 2019 has been quantitatively estimated using GEOS-Chem chemical transport model. It is shown that the formation of a stable continental pollution plume from sources in Western Europe, European Russia and Siberia allows to explain up to 5.5–8.6 % of observed CH4 surface concentration (~104–165 ppb). These atmospheric response values are several times higher than the of the observed annual methane variability amplitude (22–36 ppb), which allows to conclude that regional anthropogenic methane emissions sources play a significant role in regional CH4 balance in arctic and subarctic areas. |
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