Continuous CO2 and CH4 Observations in the Coastal Arctic Atmosphere of the Western Taimyr Peninsula, Siberia: The First Results from a New Measurement Station in Dikson

Atmosphere

卷:12

Mikhail Bondar¹  Martin Heimann²  Karl Robert Kübler²  Alexey Panov³  Anatoly Prokushkin³  Mikhail Korets³  Anastasiya Urban³ 

[1] Joint Directorate of Taimyr Nature Reserves, 663305 Norilsk, Russia;

[2] Max Planck Institute for Biogeochemistry, D07745 Jena, Germany;

[3] V.N. Sukachev Institute of Forest of the Siberian Branch of Russian Academy of Sciences—Separated Department of the KSC SB RAS, 660036 Krasnoyarsk, Russia;

关键词: climate;    Arctic;    Siberia;    atmospheric composition;    carbon dioxide;    methane;   

DOI  :  10.3390/atmos12070876

来源: DOAJ

【 摘 要 】

Atmospheric observations of sources and sinks of carbon dioxide (CO₂) and methane (CH₄) in the pan-Arctic domain are highly sporadic, limiting our understanding of carbon turnover in this climatically sensitive environment and the fate of enormous carbon reservoirs buried in permafrost. Particular gaps apply to the Arctic latitudes of Siberia, covered by the vast tundra ecosystems underlain by permafrost, where only few atmospheric sites are available. The paper presents the first results of continuous observations of atmospheric CO₂ and CH₄ dry mole fractions at a newly operated station “DIAMIS” (73.506828° N, 80.519869° E) deployed on the edge of the Dikson settlement on the western coast of the Taimyr Peninsula. Atmospheric mole fractions of CO₂, CH₄, and H₂O are measured by a CRDS analyzer Picarro G2301-f, which is regularly calibrated against WMO-traceable gases. Meteorological records permit screening of trace gas series. Here, we give the scientific rationale of the site, describe the instrumental setup, analyze the local environments, examine the seasonal footprint, and show CO₂ and CH₄ fluctuations for the daytime mixed atmospheric layer that is representative over a vast Arctic domain (~500–1000 km), capturing both terrestrial and oceanic signals.

【 授权许可】

Unknown