期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 15, 页码 8286-8297出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL070114
关键词
ammonia; biomass burning; Arctic; FTIR spectroscopy; PEARL; NDACC
资金
- CAFTON project
- Canadian Space Agency's FAST Program
- Government of Canada IPY funding
- Netherlands Organisation for Scientific Research [GO/12-36]
- NASA/HQ
We report the first long-term measurements of ammonia (NH3) in the high Arctic. Enhancements of the total columns of NH3, carbon monoxide (CO), hydrogen cyanide (HCN), and ethane (C2H6) were detected in July and August 2014 at Eureka, Nunavut, and Toronto, Ontario. Enhancements were attributed to fires in the Northwest Territories using the FLEXPART Lagrangian dispersion model and the Moderate Resolution Imaging Spectroradiometer Fire Hot Spot data set. Emission estimates are reported as average emission factors for HCN (0.62 0.34gkg(-1)), C2H6 (1.50 0.75gkg(-1)), and NH3 (1.40 0.72gkg(-1)). Observations of NH3 at both sites demonstrate long-range transport of NH3, with an estimated NH3 lifetime of 48h. We also conclude that boreal fires may be an important source of NH3 in the summertime Arctic.
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