Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models
We investigate Arctic tropospheric composition using ground-based Fourier transform infrared (FTIR) solar absorption spectra, recorded at the Polar Environment Atmospheric Research Laboratory (PEARL, Eureka, Nunavut, Canada, 80°05' N, 86°42' W) and at Thule (Greenland, 76°53' N, −68°7...
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European Geosciences Union
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ftcaltechauth:oai:authors.library.caltech.edu:56612 2023-05-15T14:27:35+02:00 Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models Viatte, C. Strong, K. Hannigan, J. Nussbaumer, E. Emmons, L. K. Conway, S. Paton-Walsh, C. Hartley, J. Benmergui, J. Lin, J. 2015-03-02 application/pdf https://authors.library.caltech.edu/56612/ https://authors.library.caltech.edu/56612/1/acp-15-2227-2015.pdf https://resolver.caltech.edu/CaltechAUTHORS:20150413-144434095 en eng European Geosciences Union https://authors.library.caltech.edu/56612/1/acp-15-2227-2015.pdf Viatte, C. and Strong, K. and Hannigan, J. and Nussbaumer, E. and Emmons, L. K. and Conway, S. and Paton-Walsh, C. and Hartley, J. and Benmergui, J. and Lin, J. (2015) Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models. Atmospheric Chemistry and Physics, 15 (5). pp. 2227-2246. ISSN 1680-7316. doi:10.5194/acp-15-2227-2015. https://resolver.caltech.edu/CaltechAUTHORS:20150413-144434095 <https://resolver.caltech.edu/CaltechAUTHORS:20150413-144434095> cc_by CC-BY Article PeerReviewed 2015 ftcaltechauth https://doi.org/10.5194/acp-15-2227-2015 2021-11-11T19:03:46Z We investigate Arctic tropospheric composition using ground-based Fourier transform infrared (FTIR) solar absorption spectra, recorded at the Polar Environment Atmospheric Research Laboratory (PEARL, Eureka, Nunavut, Canada, 80°05' N, 86°42' W) and at Thule (Greenland, 76°53' N, −68°74' W) from 2008 to 2012. The target species, carbon monoxide (CO), hydrogen cyanide (HCN), ethane (C_2H_6), acetylene (C_2H_2), formic acid (HCOOH), and formaldehyde (H_2CO) are emitted by biomass burning and can be transported from mid-latitudes to the Arctic. By detecting simultaneous enhancements of three biomass burning tracers (HCN, CO, and C_2H_6), ten and eight fire events are identified at Eureka and Thule, respectively, within the 5-year FTIR time series. Analyses of Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model back-trajectories coupled with Moderate Resolution Imaging Spectroradiometer (MODIS) fire hotspot data, Stochastic Time-Inverted Lagrangian Transport (STILT) model footprints, and Ozone Monitoring Instrument (OMI) UV aerosol index maps, are used to attribute burning source regions and travel time durations of the plumes. By taking into account the effect of aging of the smoke plumes, measured FTIR enhancement ratios were corrected to obtain emission ratios and equivalent emission factors. The means of emission factors for extratropical forest estimated with the two FTIR data sets are 0.40 ± 0.21 g kg^(−1) for HCN, 1.24 ± 0.71 g kg^(−1) for C_2H_6, 0.34 ± 0.21 g kg^(−1) for C_2H_2, and 2.92 ± 1.30 g kg^(−1) for HCOOH. The emission factor for CH_3OH estimated at Eureka is 3.44 ± 1.68 g kg^(−1). To improve our knowledge concerning the dynamical and chemical processes associated with Arctic pollution from fires, the two sets of FTIR measurements were compared to the Model for OZone And Related chemical Tracers, version 4 (MOZART-4). Seasonal cycles and day-to-day variabilities were compared to assess the ability of the model to reproduce emissions from fires and their transport. Good agreement in winter confirms that transport is well implemented in the model. For C_2H_6, however, the lower wintertime concentration estimated by the model as compared to the FTIR observations highlights an underestimation of its emission. Results show that modeled and measured total columns are correlated (linear correlation coefficient r > 0.6 for all gases except for H_2CO at Eureka and HCOOH at Thule), but suggest a general underestimation of the concentrations in the model for all seven tropospheric species in the high Arctic. Article in Journal/Newspaper Arctic Arctic Arctic pollution Eureka Greenland Nunavut Thule Caltech Authors (California Institute of Technology) Arctic Canada Eureka ENVELOPE(-85.940,-85.940,79.990,79.990) Greenland Nunavut Atmospheric Chemistry and Physics 15 5 2227 2246 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
We investigate Arctic tropospheric composition using ground-based Fourier transform infrared (FTIR) solar absorption spectra, recorded at the Polar Environment Atmospheric Research Laboratory (PEARL, Eureka, Nunavut, Canada, 80°05' N, 86°42' W) and at Thule (Greenland, 76°53' N, −68°74' W) from 2008 to 2012. The target species, carbon monoxide (CO), hydrogen cyanide (HCN), ethane (C_2H_6), acetylene (C_2H_2), formic acid (HCOOH), and formaldehyde (H_2CO) are emitted by biomass burning and can be transported from mid-latitudes to the Arctic. By detecting simultaneous enhancements of three biomass burning tracers (HCN, CO, and C_2H_6), ten and eight fire events are identified at Eureka and Thule, respectively, within the 5-year FTIR time series. Analyses of Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model back-trajectories coupled with Moderate Resolution Imaging Spectroradiometer (MODIS) fire hotspot data, Stochastic Time-Inverted Lagrangian Transport (STILT) model footprints, and Ozone Monitoring Instrument (OMI) UV aerosol index maps, are used to attribute burning source regions and travel time durations of the plumes. By taking into account the effect of aging of the smoke plumes, measured FTIR enhancement ratios were corrected to obtain emission ratios and equivalent emission factors. The means of emission factors for extratropical forest estimated with the two FTIR data sets are 0.40 ± 0.21 g kg^(−1) for HCN, 1.24 ± 0.71 g kg^(−1) for C_2H_6, 0.34 ± 0.21 g kg^(−1) for C_2H_2, and 2.92 ± 1.30 g kg^(−1) for HCOOH. The emission factor for CH_3OH estimated at Eureka is 3.44 ± 1.68 g kg^(−1). To improve our knowledge concerning the dynamical and chemical processes associated with Arctic pollution from fires, the two sets of FTIR measurements were compared to the Model for OZone And Related chemical Tracers, version 4 (MOZART-4). Seasonal cycles and day-to-day variabilities were compared to assess the ability of the model to reproduce emissions from fires and their transport. Good agreement in winter confirms that transport is well implemented in the model. For C_2H_6, however, the lower wintertime concentration estimated by the model as compared to the FTIR observations highlights an underestimation of its emission. Results show that modeled and measured total columns are correlated (linear correlation coefficient r > 0.6 for all gases except for H_2CO at Eureka and HCOOH at Thule), but suggest a general underestimation of the concentrations in the model for all seven tropospheric species in the high Arctic. |
format |
Article in Journal/Newspaper |
author |
Viatte, C. Strong, K. Hannigan, J. Nussbaumer, E. Emmons, L. K. Conway, S. Paton-Walsh, C. Hartley, J. Benmergui, J. Lin, J. |
spellingShingle |
Viatte, C. Strong, K. Hannigan, J. Nussbaumer, E. Emmons, L. K. Conway, S. Paton-Walsh, C. Hartley, J. Benmergui, J. Lin, J. Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models |
author_facet |
Viatte, C. Strong, K. Hannigan, J. Nussbaumer, E. Emmons, L. K. Conway, S. Paton-Walsh, C. Hartley, J. Benmergui, J. Lin, J. |
author_sort |
Viatte, C. |
title |
Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models |
title_short |
Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models |
title_full |
Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models |
title_fullStr |
Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models |
title_full_unstemmed |
Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models |
title_sort |
identifying fire plumes in the arctic with tropospheric ftir measurements and transport models |
publisher |
European Geosciences Union |
publishDate |
2015 |
url |
https://authors.library.caltech.edu/56612/ https://authors.library.caltech.edu/56612/1/acp-15-2227-2015.pdf https://resolver.caltech.edu/CaltechAUTHORS:20150413-144434095 |
long_lat |
ENVELOPE(-85.940,-85.940,79.990,79.990) |
geographic |
Arctic Canada Eureka Greenland Nunavut |
geographic_facet |
Arctic Canada Eureka Greenland Nunavut |
genre |
Arctic Arctic Arctic pollution Eureka Greenland Nunavut Thule |
genre_facet |
Arctic Arctic Arctic pollution Eureka Greenland Nunavut Thule |
op_relation |
https://authors.library.caltech.edu/56612/1/acp-15-2227-2015.pdf Viatte, C. and Strong, K. and Hannigan, J. and Nussbaumer, E. and Emmons, L. K. and Conway, S. and Paton-Walsh, C. and Hartley, J. and Benmergui, J. and Lin, J. (2015) Identifying fire plumes in the Arctic with tropospheric FTIR measurements and transport models. Atmospheric Chemistry and Physics, 15 (5). pp. 2227-2246. ISSN 1680-7316. doi:10.5194/acp-15-2227-2015. https://resolver.caltech.edu/CaltechAUTHORS:20150413-144434095 <https://resolver.caltech.edu/CaltechAUTHORS:20150413-144434095> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-15-2227-2015 |
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Atmospheric Chemistry and Physics |
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15 |
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5 |
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2227 |
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