Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008
High-resolution in situ CO_2 measurements were conducted aboard the NASA DC-8 aircraft during the ARCTAS/POLARCAT field campaign, a component of the wider 2007–2008 International Polar Year activities. Data were recorded during large-scale surveys spanning the North American subâ€Arctic to the Nor...
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ftcaltechauth:oai:authors.library.caltech.edu:c1jsx-50k73 2024-09-15T17:59:59+00:00 Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008 Vay, S. A. Choi, Y. Vadrevu, K. P. Blake, D. R. Tyler, S. C. Wisthaler, A. Hecobian, A. Kondo, K. Diskin, G. S. Sachse, G. W. Woo, J.-H. Weinheimer, A. J. Burkhart, J. F. Stohl, A. Wennberg, P. O. 2011-07-16 https://doi.org/10.1029/2011JD015643 unknown American Geophysical Union https://doi.org/10.1029/2011JD015643 oai:authors.library.caltech.edu:c1jsx-50k73 eprintid:24673 resolverid:CaltechAUTHORS:20110804-090820448 info:eu-repo/semantics/openAccess Other Journal of Geophysical Research D, 116, Art. No. D14301, (2011-07-16) ^(14)CO_2 ARCTAS CO_2 International Polar Year POLARCAT airborne observations info:eu-repo/semantics/article 2011 ftcaltechauth https://doi.org/10.1029/2011JD015643 2024-08-06T15:35:00Z High-resolution in situ CO_2 measurements were conducted aboard the NASA DC-8 aircraft during the ARCTAS/POLARCAT field campaign, a component of the wider 2007–2008 International Polar Year activities. Data were recorded during large-scale surveys spanning the North American subâ€Arctic to the North Pole from 0.04 to 12 km altitude in spring and summer of 2008. Influences on the observed CO_2 concentrations were investigated using coincident CO, black carbon, CH_3CN, HCN, O_3, C_2Cl_4, and Δ^(14)CO_2 data, and the FLEXPART model. In spring, the CO_2 spatial distribution from 55°N to 90°N was largely determined by the long-range transport of air masses laden with Asian anthropogenic pollution intermingled with Eurasian fire emissions evidenced by the greater variability in the mid-to-upper troposphere. At the receptor site, the enhancement ratios of CO_2 to CO in pollution plumes ranged from 27 to 80 ppmv ppmv^(−1) with the highest anthropogenic content registered in plumes sampled poleward of 80°N. In summer, the CO_2 signal largely reflected emissions from lightning-ignited wildfires within the boreal forests of northern Saskatchewan juxtaposed with uptake by the terrestrial biosphere. Measurements within fresh fire plumes yielded CO_2 to CO emission ratios of 4 to 16 ppmv ppmv^(−1) and a mean CO_2 emission factor of 1698 ± 280 g kg^(−1) dry matter. From the ^(14)C in CO_2 content of 48 whole air samples, mean spring (46.6 ± 4.4‰) and summer (51.5 ± 5‰) Δ^(14)CO_2 values indicate a 5‰ seasonal difference. Although the northern midlatitudes were identified as the emissions source regions for the majority of the spring samples, depleted Δ^(14)CO_2 values were observed in <1% of the data set. Rather, ARCTAS Δ^(14)CO_2 observations (54%) revealed predominately a pattern of positive disequilibrium (1–7‰) with respect to background regardless of season owing to both heterotrophic respiration and fire-induced combustion of biomass. Anomalously enriched Δ^(14)CO_2 values (101–262‰) ... Article in Journal/Newspaper black carbon International Polar Year North Pole Caltech Authors (California Institute of Technology) Journal of Geophysical Research 116 D14 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
^(14)CO_2 ARCTAS CO_2 International Polar Year POLARCAT airborne observations |
spellingShingle |
^(14)CO_2 ARCTAS CO_2 International Polar Year POLARCAT airborne observations Vay, S. A. Choi, Y. Vadrevu, K. P. Blake, D. R. Tyler, S. C. Wisthaler, A. Hecobian, A. Kondo, K. Diskin, G. S. Sachse, G. W. Woo, J.-H. Weinheimer, A. J. Burkhart, J. F. Stohl, A. Wennberg, P. O. Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008 |
topic_facet |
^(14)CO_2 ARCTAS CO_2 International Polar Year POLARCAT airborne observations |
description |
High-resolution in situ CO_2 measurements were conducted aboard the NASA DC-8 aircraft during the ARCTAS/POLARCAT field campaign, a component of the wider 2007–2008 International Polar Year activities. Data were recorded during large-scale surveys spanning the North American subâ€Arctic to the North Pole from 0.04 to 12 km altitude in spring and summer of 2008. Influences on the observed CO_2 concentrations were investigated using coincident CO, black carbon, CH_3CN, HCN, O_3, C_2Cl_4, and Δ^(14)CO_2 data, and the FLEXPART model. In spring, the CO_2 spatial distribution from 55°N to 90°N was largely determined by the long-range transport of air masses laden with Asian anthropogenic pollution intermingled with Eurasian fire emissions evidenced by the greater variability in the mid-to-upper troposphere. At the receptor site, the enhancement ratios of CO_2 to CO in pollution plumes ranged from 27 to 80 ppmv ppmv^(−1) with the highest anthropogenic content registered in plumes sampled poleward of 80°N. In summer, the CO_2 signal largely reflected emissions from lightning-ignited wildfires within the boreal forests of northern Saskatchewan juxtaposed with uptake by the terrestrial biosphere. Measurements within fresh fire plumes yielded CO_2 to CO emission ratios of 4 to 16 ppmv ppmv^(−1) and a mean CO_2 emission factor of 1698 ± 280 g kg^(−1) dry matter. From the ^(14)C in CO_2 content of 48 whole air samples, mean spring (46.6 ± 4.4‰) and summer (51.5 ± 5‰) Δ^(14)CO_2 values indicate a 5‰ seasonal difference. Although the northern midlatitudes were identified as the emissions source regions for the majority of the spring samples, depleted Δ^(14)CO_2 values were observed in <1% of the data set. Rather, ARCTAS Δ^(14)CO_2 observations (54%) revealed predominately a pattern of positive disequilibrium (1–7‰) with respect to background regardless of season owing to both heterotrophic respiration and fire-induced combustion of biomass. Anomalously enriched Δ^(14)CO_2 values (101–262‰) ... |
format |
Article in Journal/Newspaper |
author |
Vay, S. A. Choi, Y. Vadrevu, K. P. Blake, D. R. Tyler, S. C. Wisthaler, A. Hecobian, A. Kondo, K. Diskin, G. S. Sachse, G. W. Woo, J.-H. Weinheimer, A. J. Burkhart, J. F. Stohl, A. Wennberg, P. O. |
author_facet |
Vay, S. A. Choi, Y. Vadrevu, K. P. Blake, D. R. Tyler, S. C. Wisthaler, A. Hecobian, A. Kondo, K. Diskin, G. S. Sachse, G. W. Woo, J.-H. Weinheimer, A. J. Burkhart, J. F. Stohl, A. Wennberg, P. O. |
author_sort |
Vay, S. A. |
title |
Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008 |
title_short |
Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008 |
title_full |
Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008 |
title_fullStr |
Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008 |
title_full_unstemmed |
Patterns of CO_2 and radiocarbon across high northern latitudes during International Polar Year 2008 |
title_sort |
patterns of co_2 and radiocarbon across high northern latitudes during international polar year 2008 |
publisher |
American Geophysical Union |
publishDate |
2011 |
url |
https://doi.org/10.1029/2011JD015643 |
genre |
black carbon International Polar Year North Pole |
genre_facet |
black carbon International Polar Year North Pole |
op_source |
Journal of Geophysical Research D, 116, Art. No. D14301, (2011-07-16) |
op_relation |
https://doi.org/10.1029/2011JD015643 oai:authors.library.caltech.edu:c1jsx-50k73 eprintid:24673 resolverid:CaltechAUTHORS:20110804-090820448 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1029/2011JD015643 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
D14 |
_version_ |
1810437094860914688 |