Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study
One of the major goals of the 2005 Antarctic Tropospheric Chemistry Investigation (ANTCI) was to bridge the information gap between current knowledge of South Pole (SP) chemistry and that of the plateau. The former has been extensively studied, but its geographical position on the edge of the platea...
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ftcdlib:qt7v22v170 2023-05-15T13:52:22+02:00 Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study Slusher, D. L Neff, W. D Kim, S. Huey, L. G Wang, Y. Zeng, T. Tanner, D. J Blake, D. R Beyersdorf, A. Lefer, B. L Crawford, J. H Eisele, F. L Mauldin, R. L Kosciuch, E. Buhr, M. P Wallace, H. W Davis, D. D 2010-04-13 application/pdf http://www.escholarship.org/uc/item/7v22v170 english eng eScholarship, University of California qt7v22v170 http://www.escholarship.org/uc/item/7v22v170 Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Slusher, D. L; Neff, W. D; Kim, S.; Huey, L. G; Wang, Y.; Zeng, T.; et al.(2010). Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study. Journal of Geophysical Research, 115(D7). doi:10.1029/2009jd012605. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/7v22v170 Physical Sciences and Mathematics photolysis frequency measurements ho2no2 peroxynitric acid polar ice cores south-pole boundary-layer photochemical production high-sensitivity pernitric acid surface-layer nitric-oxide article 2010 ftcdlib https://doi.org/10.1029/2009jd012605 2016-04-02T18:49:19Z One of the major goals of the 2005 Antarctic Tropospheric Chemistry Investigation (ANTCI) was to bridge the information gap between current knowledge of South Pole (SP) chemistry and that of the plateau. The former has been extensively studied, but its geographical position on the edge of the plateau makes extrapolating these findings across the plateau problematic. The airborne observations reported here demonstrate that, as at SP, elevated levels of nitric oxide (NO) are a common summertime feature of the plateau. As in earlier studies, planetary boundary layer (PBL) variations were a contributing factor leading to NO fluctuations. Thus, extensive use was made of in situ measurements and models to characterize PBL depths along each flight path and over broader areas of the plateau. Consistent with earlier SP studies that revealed photolysis of nitrate in surface snow as the source of NO x , large vertical gradients in NO were observed over most plateau areas sampled. Similar gradients were also found for the nitrogen species HNO3 and HO2NO2 and for O3. Thus, a common meteorological-chemical feature found was shallow PBLs associated with nitrogen species concentrations that exceeded free tropospheric levels. Collectively, these new results greatly extend the geographical sampling footprint defined by earlier SP studies. In particular, they suggest that previous assessments of the plateau as simply a chemical depository need updating. Although the evidence supporting this position comes in many forms, the fact that net photochemical production of ozone occurs during summer months over extensive areas of the plateau is pivotal. Article in Journal/Newspaper Antarc* Antarctic South pole South pole University of California: eScholarship Antarctic South Pole Journal of Geophysical Research 115 D7 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Physical Sciences and Mathematics photolysis frequency measurements ho2no2 peroxynitric acid polar ice cores south-pole boundary-layer photochemical production high-sensitivity pernitric acid surface-layer nitric-oxide |
spellingShingle |
Physical Sciences and Mathematics photolysis frequency measurements ho2no2 peroxynitric acid polar ice cores south-pole boundary-layer photochemical production high-sensitivity pernitric acid surface-layer nitric-oxide Slusher, D. L Neff, W. D Kim, S. Huey, L. G Wang, Y. Zeng, T. Tanner, D. J Blake, D. R Beyersdorf, A. Lefer, B. L Crawford, J. H Eisele, F. L Mauldin, R. L Kosciuch, E. Buhr, M. P Wallace, H. W Davis, D. D Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study |
topic_facet |
Physical Sciences and Mathematics photolysis frequency measurements ho2no2 peroxynitric acid polar ice cores south-pole boundary-layer photochemical production high-sensitivity pernitric acid surface-layer nitric-oxide |
description |
One of the major goals of the 2005 Antarctic Tropospheric Chemistry Investigation (ANTCI) was to bridge the information gap between current knowledge of South Pole (SP) chemistry and that of the plateau. The former has been extensively studied, but its geographical position on the edge of the plateau makes extrapolating these findings across the plateau problematic. The airborne observations reported here demonstrate that, as at SP, elevated levels of nitric oxide (NO) are a common summertime feature of the plateau. As in earlier studies, planetary boundary layer (PBL) variations were a contributing factor leading to NO fluctuations. Thus, extensive use was made of in situ measurements and models to characterize PBL depths along each flight path and over broader areas of the plateau. Consistent with earlier SP studies that revealed photolysis of nitrate in surface snow as the source of NO x , large vertical gradients in NO were observed over most plateau areas sampled. Similar gradients were also found for the nitrogen species HNO3 and HO2NO2 and for O3. Thus, a common meteorological-chemical feature found was shallow PBLs associated with nitrogen species concentrations that exceeded free tropospheric levels. Collectively, these new results greatly extend the geographical sampling footprint defined by earlier SP studies. In particular, they suggest that previous assessments of the plateau as simply a chemical depository need updating. Although the evidence supporting this position comes in many forms, the fact that net photochemical production of ozone occurs during summer months over extensive areas of the plateau is pivotal. |
format |
Article in Journal/Newspaper |
author |
Slusher, D. L Neff, W. D Kim, S. Huey, L. G Wang, Y. Zeng, T. Tanner, D. J Blake, D. R Beyersdorf, A. Lefer, B. L Crawford, J. H Eisele, F. L Mauldin, R. L Kosciuch, E. Buhr, M. P Wallace, H. W Davis, D. D |
author_facet |
Slusher, D. L Neff, W. D Kim, S. Huey, L. G Wang, Y. Zeng, T. Tanner, D. J Blake, D. R Beyersdorf, A. Lefer, B. L Crawford, J. H Eisele, F. L Mauldin, R. L Kosciuch, E. Buhr, M. P Wallace, H. W Davis, D. D |
author_sort |
Slusher, D. L |
title |
Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study |
title_short |
Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study |
title_full |
Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study |
title_fullStr |
Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study |
title_full_unstemmed |
Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study |
title_sort |
atmospheric chemistry results from the antci 2005 antarctic plateau airborne study |
publisher |
eScholarship, University of California |
publishDate |
2010 |
url |
http://www.escholarship.org/uc/item/7v22v170 |
geographic |
Antarctic South Pole |
geographic_facet |
Antarctic South Pole |
genre |
Antarc* Antarctic South pole South pole |
genre_facet |
Antarc* Antarctic South pole South pole |
op_source |
Slusher, D. L; Neff, W. D; Kim, S.; Huey, L. G; Wang, Y.; Zeng, T.; et al.(2010). Atmospheric chemistry results from the ANTCI 2005 Antarctic plateau airborne study. Journal of Geophysical Research, 115(D7). doi:10.1029/2009jd012605. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/7v22v170 |
op_relation |
qt7v22v170 http://www.escholarship.org/uc/item/7v22v170 |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2009jd012605 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
D7 |
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1766256648096055296 |