Lutsch, Erik, Strong, Kimberly, Jones, Dylan B.A. et al. (17 more authors) (2019) Unprecedented atmospheric ammonia concentrations detected in the high Arctic from the 2017 Canadian wildfires. Journal of Geophysical Research: Atmospheres. ISSN 2169-8996
Abstract
Abstract From 17-22 August 2017 simultaneous enhancements of ammonia (NH3), carbon monoxide (CO), hydrogen cyanide (HCN), and ethane (C2H6) were detected from ground-based solar absorption Fourier transform infrared (FTIR) spectroscopic measurements at two high-Arctic sites: Eureka (80.05°N, 86.42°W) Nunavut, Canada and Thule (76.53°N, 68.74°W), Greenland. These enhancements were attributed to wildfires in British Columbia and the Northwest Territories of Canada using FLEXPART back-trajectories and fire locations from Moderate Resolution Imaging Spectroradiometer (MODIS) and found to be the greatest observed enhancements in more than a decade of measurements at Eureka (2006-2017) and Thule (1999-2017). Observations of gas-phase NH3 from these wildfires illustrates that boreal wildfires may be a considerable episodic source of NH3 in the summertime high Arctic. Comparisons of GEOS-Chem model simulations using the Global Fire Assimilation System (GFASv1.2) biomass burning emissions to FTIR measurements and Infrared Atmospheric Sounding Interferometer (IASI) measurements showed that the transport of wildfire emissions to the Arctic was underestimated in GEOS-Chem. However, GEOS-Chem simulations showed that these wildfires contributed to surface-layer NH3 and enhancements of 0.01-0.11 ppbv and 0.05-1.07 ppbv, respectively, over the Canadian Archipelago from 15-23 August 2017.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | ©2019. American Geophysical Union. All Rights Reserved. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Keywords: | Ammonia, Arctic, FTIR, NDACC, PEARL, Wildfires |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 09 Jul 2019 12:50 |
Last Modified: | 16 Oct 2024 15:51 |
Published Version: | https://doi.org/10.1029/2019JD030419 |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1029/2019JD030419 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:148358 |
Download
Filename: Lutsch_et_al_2019_Journal_of_Geophysical_Research_Atmospheres.pdf
Description: Lutsch_et_al-2019-Journal_of_Geophysical_Research__Atmospheres