Bromine measurements in ozone depleted air over the Arctic Ocean
In situ measurements of ozone, photochemically active bromine compounds, and other trace gases over the Arctic Ocean in April 2008 are used to examine the chemistry and geographical extent of ozone depletion in the arctic marine boundary layer (MBL). Data were obtained from the NOAA WP-3D aircraft d...
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ftuninhampshire:oai:scholars.unh.edu:earthsci_facpub-1069 2023-05-15T14:34:52+02:00 Bromine measurements in ozone depleted air over the Arctic Ocean Neuman, J A Nowak, J Huey, L Gregory Burkholder, J B Dibb, Jack E. Holloway, J S Liao, J Peischl, Jeff Roberts, J M Ryerson, Thomas B Scheuer, Eric Stark, H Stickel, R E Tanner, D Weinheimer, Andrew 2010-07-16T07:00:00Z application/pdf https://scholars.unh.edu/earthsci_facpub/70 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1069&context=earthsci_facpub unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/earthsci_facpub/70 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1069&context=earthsci_facpub © Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License. CC-BY Earth Sciences Scholarship text 2010 ftuninhampshire 2023-01-30T21:34:09Z In situ measurements of ozone, photochemically active bromine compounds, and other trace gases over the Arctic Ocean in April 2008 are used to examine the chemistry and geographical extent of ozone depletion in the arctic marine boundary layer (MBL). Data were obtained from the NOAA WP-3D aircraft during the Aerosol, Radiation, and Cloud Processes affecting Arctic Climate (ARCPAC) study and the NASA DC-8 aircraft during the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) study. Fast (1 s) and sensitive (detection limits at the low pptv level) measurements of BrCl and BrO were obtained from three different chemical ionization mass spectrometer (CIMS) instruments, and soluble bromide was measured with a mist chamber. The CIMS instruments also detected Br2. Subsequent laboratory studies showed that HOBr rapidly converts to Br2 on the Teflon instrument inlets. This detected Br2 is identified as active bromine and represents a lower limit of the sum HOBr + Br2. The measured active bromine is shown to likely be HOBr during daytime flights in the arctic. In the MBL over the Arctic Ocean, soluble bromide and active bromine were consistently elevated and ozone was depleted. Ozone depletion and active bromine enhancement were confined to the MBL that was capped by a temperature inversion at 200–500 m altitude. In ozone-depleted air, BrO rarely exceeded 10 pptv and was always substantially lower than soluble bromide that was as high as 40 pptv. BrCl was rarely enhanced above the 2 pptv detection limit, either in the MBL, over Alaska, or in the arctic free troposphere. Text Arctic Arctic Ocean Alaska University of New Hampshire: Scholars Repository Arctic Arctic Ocean |
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University of New Hampshire: Scholars Repository |
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ftuninhampshire |
language |
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description |
In situ measurements of ozone, photochemically active bromine compounds, and other trace gases over the Arctic Ocean in April 2008 are used to examine the chemistry and geographical extent of ozone depletion in the arctic marine boundary layer (MBL). Data were obtained from the NOAA WP-3D aircraft during the Aerosol, Radiation, and Cloud Processes affecting Arctic Climate (ARCPAC) study and the NASA DC-8 aircraft during the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) study. Fast (1 s) and sensitive (detection limits at the low pptv level) measurements of BrCl and BrO were obtained from three different chemical ionization mass spectrometer (CIMS) instruments, and soluble bromide was measured with a mist chamber. The CIMS instruments also detected Br2. Subsequent laboratory studies showed that HOBr rapidly converts to Br2 on the Teflon instrument inlets. This detected Br2 is identified as active bromine and represents a lower limit of the sum HOBr + Br2. The measured active bromine is shown to likely be HOBr during daytime flights in the arctic. In the MBL over the Arctic Ocean, soluble bromide and active bromine were consistently elevated and ozone was depleted. Ozone depletion and active bromine enhancement were confined to the MBL that was capped by a temperature inversion at 200–500 m altitude. In ozone-depleted air, BrO rarely exceeded 10 pptv and was always substantially lower than soluble bromide that was as high as 40 pptv. BrCl was rarely enhanced above the 2 pptv detection limit, either in the MBL, over Alaska, or in the arctic free troposphere. |
format |
Text |
author |
Neuman, J A Nowak, J Huey, L Gregory Burkholder, J B Dibb, Jack E. Holloway, J S Liao, J Peischl, Jeff Roberts, J M Ryerson, Thomas B Scheuer, Eric Stark, H Stickel, R E Tanner, D Weinheimer, Andrew |
spellingShingle |
Neuman, J A Nowak, J Huey, L Gregory Burkholder, J B Dibb, Jack E. Holloway, J S Liao, J Peischl, Jeff Roberts, J M Ryerson, Thomas B Scheuer, Eric Stark, H Stickel, R E Tanner, D Weinheimer, Andrew Bromine measurements in ozone depleted air over the Arctic Ocean |
author_facet |
Neuman, J A Nowak, J Huey, L Gregory Burkholder, J B Dibb, Jack E. Holloway, J S Liao, J Peischl, Jeff Roberts, J M Ryerson, Thomas B Scheuer, Eric Stark, H Stickel, R E Tanner, D Weinheimer, Andrew |
author_sort |
Neuman, J A |
title |
Bromine measurements in ozone depleted air over the Arctic Ocean |
title_short |
Bromine measurements in ozone depleted air over the Arctic Ocean |
title_full |
Bromine measurements in ozone depleted air over the Arctic Ocean |
title_fullStr |
Bromine measurements in ozone depleted air over the Arctic Ocean |
title_full_unstemmed |
Bromine measurements in ozone depleted air over the Arctic Ocean |
title_sort |
bromine measurements in ozone depleted air over the arctic ocean |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2010 |
url |
https://scholars.unh.edu/earthsci_facpub/70 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1069&context=earthsci_facpub |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Alaska |
genre_facet |
Arctic Arctic Ocean Alaska |
op_source |
Earth Sciences Scholarship |
op_relation |
https://scholars.unh.edu/earthsci_facpub/70 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1069&context=earthsci_facpub |
op_rights |
© Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License. |
op_rightsnorm |
CC-BY |
_version_ |
1766307811707322368 |