Accurate measurements of atmospheric carbon dioxide and methane mole fractions at the Siberian coastal site Ambarchik
<p>Sparse data coverage in the Arctic hampers our understanding of its carbon cycle dynamics and our predictions of the fate of its vast carbon reservoirs in a changing climate. In this paper, we present accurate measurements of atmospheric carbon dioxide (<span class="inline-formula&q...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-10-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/12/5717/2019/amt-12-5717-2019.pdf |
| Summary: | <p>Sparse data coverage in the Arctic hampers our
understanding of its carbon cycle dynamics and our predictions of the fate
of its vast carbon reservoirs in a changing climate. In this paper, we
present accurate measurements of atmospheric carbon dioxide (<span class="inline-formula">CO<sub>2</sub></span>) and methane (<span class="inline-formula">CH<sub>4</sub></span>) dry air
mole fractions at the new atmospheric carbon observation station Ambarchik,
which closes a large gap in the atmospheric trace gas monitoring network in
northeastern Siberia. The site, which has been operational since August 2014, is located
near the delta of the Kolyma River at the coast of the Arctic Ocean. Data
quality control of <span class="inline-formula">CO<sub>2</sub></span> and <span class="inline-formula">CH<sub>4</sub></span> measurements includes frequent
calibrations traced to World
Meteorological Organization (WMO) scales, employment of a novel water vapor
correction, an algorithm to detect the influence of local polluters, and
meteorological measurements that enable data selection. The available
<span class="inline-formula">CO<sub>2</sub></span> and <span class="inline-formula">CH<sub>4</sub></span> record was characterized in comparison with in situ
data from Barrow, Alaska. A footprint analysis reveals that the station is
sensitive to signals from the East Siberian Sea, as well as the northeast
Siberian tundra and taiga regions. This makes data from Ambarchik highly
valuable for inverse modeling studies aimed at constraining carbon budgets
within the pan-Arctic domain, as well as for regional studies focusing on
Siberia and the adjacent shelf areas of the Arctic Ocean.</p> |
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| ISSN: | 1867-1381 1867-8548 |