Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign
International audience A case of continental outflow from the United States (US) was examined using airborne measurements from NASA DC-8 flight 13 during the Intercontinental Chemical Transport Experiment ? North America (INTEX-NA). Mixing ratios of methane (CH 4 ) and carbon monoxide (CO) at 8?11 k...
Main Authors: | , , , , , |
---|---|
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2008
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00296518 https://hal.archives-ouvertes.fr/hal-00296518/document https://hal.archives-ouvertes.fr/hal-00296518/file/acp-8-1989-2008.pdf |
id |
ftccsdartic:oai:HAL:hal-00296518v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00296518v1 2023-05-15T17:27:50+02:00 Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign Kim, S. Y. Talbot, R. Mao, H. Blake, D. Vay, S. Fuelberg, H. Institute for Study of Earth, Oceans and Space University of New Hampshire (UNH) Department of Chemistry University of California Irvine (UCI) University of California-University of California Chemistry and Dynamics Branch LaRC NASA Langley Research Center Hampton (LaRC) Department of Earth, Ocean and Atmospheric Science Tallahassee (FSU Florida State University Tallahassee (FSU) 2008-04-08 https://hal.archives-ouvertes.fr/hal-00296518 https://hal.archives-ouvertes.fr/hal-00296518/document https://hal.archives-ouvertes.fr/hal-00296518/file/acp-8-1989-2008.pdf en eng HAL CCSD European Geosciences Union hal-00296518 https://hal.archives-ouvertes.fr/hal-00296518 https://hal.archives-ouvertes.fr/hal-00296518/document https://hal.archives-ouvertes.fr/hal-00296518/file/acp-8-1989-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.archives-ouvertes.fr/hal-00296518 Atmospheric Chemistry and Physics, European Geosciences Union, 2008, 8 (7), pp.1989-2005 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2008 ftccsdartic 2021-05-22T23:36:34Z International audience A case of continental outflow from the United States (US) was examined using airborne measurements from NASA DC-8 flight 13 during the Intercontinental Chemical Transport Experiment ? North America (INTEX-NA). Mixing ratios of methane (CH 4 ) and carbon monoxide (CO) at 8?11 km altitude over the North Atlantic were elevated to 1843 ppbv and 134 ppbv respectively, while those of carbon dioxide (CO 2 ) and carbonyl sulfide (COS) were reduced to 372.4 ppmv and 411 pptv respectively. In this region, urban and industrial influences were evidenced by elevated mixing ratios and good linear relationships between urban and industrial tracers compared to North Atlantic background air. Moreover, low mixing ratios and a good correlation between COS and CO 2 showed a fingerprint of terrestrial uptake and minimal dilution during rapid transport over a 1?2 day time period. Analysis of synoptic conditions, backward trajectories, and photochemical aging estimates based on C 3 H 8 /C 2 H 6 strongly suggested that elevated anthropogenic tracers in the upper troposphere of the flight region were the result of transport via convection and warm conveyor belt (WCB) uplifting of boundary layer air over the southeastern US. This mechanism is supported by the similar slope values of linear correlations between long-lived (months) anthropogenic tracers (e.g., C 2 Cl 4 and CHCl 3 ) from the flight region and the planetary boundary layer in the southeastern US. In addition, the aircraft measurements suggest that outflow from the US augmented the entire tropospheric column at mid-latitudes over the North Atlantic. Overall, the flight 13 data demonstrate a pervasive impact of US anthropogenic emissions on the troposphere over the North Atlantic. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Kim, S. Y. Talbot, R. Mao, H. Blake, D. Vay, S. Fuelberg, H. Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience A case of continental outflow from the United States (US) was examined using airborne measurements from NASA DC-8 flight 13 during the Intercontinental Chemical Transport Experiment ? North America (INTEX-NA). Mixing ratios of methane (CH 4 ) and carbon monoxide (CO) at 8?11 km altitude over the North Atlantic were elevated to 1843 ppbv and 134 ppbv respectively, while those of carbon dioxide (CO 2 ) and carbonyl sulfide (COS) were reduced to 372.4 ppmv and 411 pptv respectively. In this region, urban and industrial influences were evidenced by elevated mixing ratios and good linear relationships between urban and industrial tracers compared to North Atlantic background air. Moreover, low mixing ratios and a good correlation between COS and CO 2 showed a fingerprint of terrestrial uptake and minimal dilution during rapid transport over a 1?2 day time period. Analysis of synoptic conditions, backward trajectories, and photochemical aging estimates based on C 3 H 8 /C 2 H 6 strongly suggested that elevated anthropogenic tracers in the upper troposphere of the flight region were the result of transport via convection and warm conveyor belt (WCB) uplifting of boundary layer air over the southeastern US. This mechanism is supported by the similar slope values of linear correlations between long-lived (months) anthropogenic tracers (e.g., C 2 Cl 4 and CHCl 3 ) from the flight region and the planetary boundary layer in the southeastern US. In addition, the aircraft measurements suggest that outflow from the US augmented the entire tropospheric column at mid-latitudes over the North Atlantic. Overall, the flight 13 data demonstrate a pervasive impact of US anthropogenic emissions on the troposphere over the North Atlantic. |
author2 |
Institute for Study of Earth, Oceans and Space University of New Hampshire (UNH) Department of Chemistry University of California Irvine (UCI) University of California-University of California Chemistry and Dynamics Branch LaRC NASA Langley Research Center Hampton (LaRC) Department of Earth, Ocean and Atmospheric Science Tallahassee (FSU Florida State University Tallahassee (FSU) |
format |
Article in Journal/Newspaper |
author |
Kim, S. Y. Talbot, R. Mao, H. Blake, D. Vay, S. Fuelberg, H. |
author_facet |
Kim, S. Y. Talbot, R. Mao, H. Blake, D. Vay, S. Fuelberg, H. |
author_sort |
Kim, S. Y. |
title |
Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign |
title_short |
Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign |
title_full |
Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign |
title_fullStr |
Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign |
title_full_unstemmed |
Continental outflow from the US to the upper troposphere over the North Atlantic during the NASA INTEX-NA Airborne Campaign |
title_sort |
continental outflow from the us to the upper troposphere over the north atlantic during the nasa intex-na airborne campaign |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00296518 https://hal.archives-ouvertes.fr/hal-00296518/document https://hal.archives-ouvertes.fr/hal-00296518/file/acp-8-1989-2008.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.archives-ouvertes.fr/hal-00296518 Atmospheric Chemistry and Physics, European Geosciences Union, 2008, 8 (7), pp.1989-2005 |
op_relation |
hal-00296518 https://hal.archives-ouvertes.fr/hal-00296518 https://hal.archives-ouvertes.fr/hal-00296518/document https://hal.archives-ouvertes.fr/hal-00296518/file/acp-8-1989-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766120145767366656 |