Reactive nitrogen oxides and ozone above a taiga woodland
Measurements of reactive nitrogen oxides (NOₓ and NO{sub y}) and ozone (O₃) were made in the planetary boundary layer (PBL) above a taiga woodland in northern Quebec, Canada, during June-August, 1990, as part of NASA Arctic Boundary Layer Expedition (ABLE) 3B. Levels of nitrogen oxides and O₃ were s...
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ftharvardudash:oai:dash.harvard.edu:1/14121871 2023-05-15T15:08:11+02:00 Reactive nitrogen oxides and ozone above a taiga woodland Bakwin, Peter S. Jacob, Daniel James Wofsy, Steven Charles Munger, J. William Daube, Bruce C. Bradshaw, John D. Sandholm, Scott T. Talbot, Robert W. Singh, Hanwant B. Gregory, Gerald L. Blake, Donald R. 1994 application/pdf http://nrs.harvard.edu/urn-3:HUL.InstRepos:14121871 https://doi.org/10.1029/93JD02292 en_US eng Wiley-Blackwell doi:10.1029/93JD02292 J. Geophys. Res. Bakwin, Peter S., Daniel J. Jacob, Steven C. Wofsy, J. William Munger, Bruce C. Daube, John D. Bradshaw, Scott T. Sandholm, et al. 1994. “Reactive Nitrogen Oxides and Ozone Above a Taiga Woodland.” Journal of Geophysical Research 99 (D1): 1927. doi:10.1029/93jd02292. 0148-0227 http://nrs.harvard.edu/urn-3:HUL.InstRepos:14121871 Journal Article 1994 ftharvardudash https://doi.org/10.1029/93JD02292 https://doi.org/10.1029/93jd02292 2022-04-05T06:46:52Z Measurements of reactive nitrogen oxides (NOₓ and NO{sub y}) and ozone (O₃) were made in the planetary boundary layer (PBL) above a taiga woodland in northern Quebec, Canada, during June-August, 1990, as part of NASA Arctic Boundary Layer Expedition (ABLE) 3B. Levels of nitrogen oxides and O₃ were strongly modulated by the synoptic scale meteorology that brought air from various regions to the site. Industrial pollution from the Great Lakes region of the US and Canada appears to be a major source for periodic elevation of NOₓ, NO{sub y} and O₃. We find that NO/NO₂ ratios at this site at midday were approximately 50% those expected from a simple photochemical steady state between NOₓ and O₃, in contrast to our earlier results from the ABLE 3A tundra site. The difference between the taiga and tundra sites is likely due to much larger emissions of biogenic hydrocarbons (particularly isoprene) from the taiga vegetation. Hydrocarbon photooxidation leads to relatively rapid production of peroxy radicals, which convert NO to NO₂, at the taiga site. Ratios of NOₓ to NO{sub y} were typically 2-3 times higher in the PBL during ABLE 3B than during ABLE 3A. This is probably the result of high PAN levels and suppressed formation of HNO₃ from NO₂ due to high levels of biogenic hydrocarbons at the ABLE 3B site. Engineering and Applied Sciences Version of Record Article in Journal/Newspaper Arctic taiga Tundra Harvard University: DASH - Digital Access to Scholarship at Harvard Arctic Canada Journal of Geophysical Research 99 D1 1927 |
institution |
Open Polar |
collection |
Harvard University: DASH - Digital Access to Scholarship at Harvard |
op_collection_id |
ftharvardudash |
language |
English |
description |
Measurements of reactive nitrogen oxides (NOₓ and NO{sub y}) and ozone (O₃) were made in the planetary boundary layer (PBL) above a taiga woodland in northern Quebec, Canada, during June-August, 1990, as part of NASA Arctic Boundary Layer Expedition (ABLE) 3B. Levels of nitrogen oxides and O₃ were strongly modulated by the synoptic scale meteorology that brought air from various regions to the site. Industrial pollution from the Great Lakes region of the US and Canada appears to be a major source for periodic elevation of NOₓ, NO{sub y} and O₃. We find that NO/NO₂ ratios at this site at midday were approximately 50% those expected from a simple photochemical steady state between NOₓ and O₃, in contrast to our earlier results from the ABLE 3A tundra site. The difference between the taiga and tundra sites is likely due to much larger emissions of biogenic hydrocarbons (particularly isoprene) from the taiga vegetation. Hydrocarbon photooxidation leads to relatively rapid production of peroxy radicals, which convert NO to NO₂, at the taiga site. Ratios of NOₓ to NO{sub y} were typically 2-3 times higher in the PBL during ABLE 3B than during ABLE 3A. This is probably the result of high PAN levels and suppressed formation of HNO₃ from NO₂ due to high levels of biogenic hydrocarbons at the ABLE 3B site. Engineering and Applied Sciences Version of Record |
format |
Article in Journal/Newspaper |
author |
Bakwin, Peter S. Jacob, Daniel James Wofsy, Steven Charles Munger, J. William Daube, Bruce C. Bradshaw, John D. Sandholm, Scott T. Talbot, Robert W. Singh, Hanwant B. Gregory, Gerald L. Blake, Donald R. |
spellingShingle |
Bakwin, Peter S. Jacob, Daniel James Wofsy, Steven Charles Munger, J. William Daube, Bruce C. Bradshaw, John D. Sandholm, Scott T. Talbot, Robert W. Singh, Hanwant B. Gregory, Gerald L. Blake, Donald R. Reactive nitrogen oxides and ozone above a taiga woodland |
author_facet |
Bakwin, Peter S. Jacob, Daniel James Wofsy, Steven Charles Munger, J. William Daube, Bruce C. Bradshaw, John D. Sandholm, Scott T. Talbot, Robert W. Singh, Hanwant B. Gregory, Gerald L. Blake, Donald R. |
author_sort |
Bakwin, Peter S. |
title |
Reactive nitrogen oxides and ozone above a taiga woodland |
title_short |
Reactive nitrogen oxides and ozone above a taiga woodland |
title_full |
Reactive nitrogen oxides and ozone above a taiga woodland |
title_fullStr |
Reactive nitrogen oxides and ozone above a taiga woodland |
title_full_unstemmed |
Reactive nitrogen oxides and ozone above a taiga woodland |
title_sort |
reactive nitrogen oxides and ozone above a taiga woodland |
publisher |
Wiley-Blackwell |
publishDate |
1994 |
url |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:14121871 https://doi.org/10.1029/93JD02292 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic taiga Tundra |
genre_facet |
Arctic taiga Tundra |
op_relation |
doi:10.1029/93JD02292 J. Geophys. Res. Bakwin, Peter S., Daniel J. Jacob, Steven C. Wofsy, J. William Munger, Bruce C. Daube, John D. Bradshaw, Scott T. Sandholm, et al. 1994. “Reactive Nitrogen Oxides and Ozone Above a Taiga Woodland.” Journal of Geophysical Research 99 (D1): 1927. doi:10.1029/93jd02292. 0148-0227 http://nrs.harvard.edu/urn-3:HUL.InstRepos:14121871 |
op_doi |
https://doi.org/10.1029/93JD02292 https://doi.org/10.1029/93jd02292 |
container_title |
Journal of Geophysical Research |
container_volume |
99 |
container_issue |
D1 |
container_start_page |
1927 |
_version_ |
1766339598160494592 |