Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222
We discuss remote terrestrial influences on boundary layer air over the Southern Ocean and Antarctica, and the mechanisms by which they arise, using atmospheric radon observations as a proxy. Our primary motivation was to enhance the scientific community’s ability to understand and quantify the pote...
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Online Access: | https://epic.awi.de/id/eprint/47499/ https://epic.awi.de/id/eprint/47499/1/feart-06-00190.pdf https://hdl.handle.net/10013/epic.a238f7be-bb7b-4515-a6d5-272db03cd787 |
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ftawi:oai:epic.awi.de:47499 2024-09-15T17:46:17+00:00 Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 Chambers, Scott Preunkert, Susanne Weller, Rolf Hong, Sang-Bum Humphries, Ruhi S. Tositti, Laura Angot, Hélène Legrand, Michel Williams, Alastair G. Griffiths, Alan D. Crawford, Jagoda Simmons, Jack Choi, Taejin Krummel, Paul B. Molloy, Suzie Loh, Zoe Galbally, Ian Wilson, Stephen Magand, Olivier Sprovieri, Frabcesca Pirrone, Nicola Dommergue, Aurélien 2018-11-08 application/pdf https://epic.awi.de/id/eprint/47499/ https://epic.awi.de/id/eprint/47499/1/feart-06-00190.pdf https://hdl.handle.net/10013/epic.a238f7be-bb7b-4515-a6d5-272db03cd787 unknown https://epic.awi.de/id/eprint/47499/1/feart-06-00190.pdf Chambers, S. , Preunkert, S. , Weller, R. orcid:0000-0003-4880-5572 , Hong, S. B. , Humphries, R. S. , Tositti, L. , Angot, H. , Legrand, M. , Williams, A. G. , Griffiths, A. D. , Crawford, J. , Simmons, J. , Choi, T. , Krummel, P. B. , Molloy, S. , Loh, Z. , Galbally, I. , Wilson, S. , Magand, O. , Sprovieri, F. , Pirrone, N. and Dommergue, A. (2018) Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 , Frontiers in Earth Science, 6 . doi:10.3389/feart.2018.00190 <https://doi.org/10.3389/feart.2018.00190> , hdl:10013/epic.a238f7be-bb7b-4515-a6d5-272db03cd787 EPIC3Frontiers in Earth Science, 6 Article isiRev 2018 ftawi https://doi.org/10.3389/feart.2018.00190 2024-06-24T04:19:47Z We discuss remote terrestrial influences on boundary layer air over the Southern Ocean and Antarctica, and the mechanisms by which they arise, using atmospheric radon observations as a proxy. Our primary motivation was to enhance the scientific community’s ability to understand and quantify the potential effects of pollution, nutrient or pollen transport from distant land masses to these remote, sparsely-instrumented regions. Seasonal radon characteristics are discussed at 6 stations (Macquarie Island, King Sejong, Neumayer, Dumont d’Urville, Jang Bogo and Dome Concordia) using 1-4 years of continuous observations. Context is provided for differences observed between these sites by Southern Ocean radon transects between 45-67S made by the Research Vessel Investigator. Synoptic transport of continental air within the marine boundary layer (MBL) dominated radon seasonal cycles in the mid-Southern Ocean site (Macquarie Island). MBL synoptic transport, tropospheric injection, and Antarctic outflow all contributed to the seasonal cycle at the sub-Antarctic site (King Sejong). Tropospheric subsidence and injection events delivered terrestrially-influenced air to the Southern Ocean MBL in the vicinity of the circumpolar trough (or “Polar Front”). Katabatic outflow events from Antarctica were observed to modify trace gas and aerosol characteristics of the MBL 100-200 km off the coast. Radon seasonal cycles at coastal Antarctic sites were dominated by a combination of local radon sources in summer and subsidence of terrestrially-influenced tropospheric air, whereas those on the Antarctic Plateau were primarily controlled by tropospheric subsidence. Separate characterisation of long-term marine and katabatic flow air masses at Dumont d’Urville revealed monthly mean differences in summer of up to 5 ppbv in ozone and 0.3 ng m-3 in gaseous elemental mercury. These differences were largely attributed to chemical processes on the Antarctic Plateau. A comparison of our observations with some Antarctic radon simulations by ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Macquarie Island Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Frontiers in Earth Science 6 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We discuss remote terrestrial influences on boundary layer air over the Southern Ocean and Antarctica, and the mechanisms by which they arise, using atmospheric radon observations as a proxy. Our primary motivation was to enhance the scientific community’s ability to understand and quantify the potential effects of pollution, nutrient or pollen transport from distant land masses to these remote, sparsely-instrumented regions. Seasonal radon characteristics are discussed at 6 stations (Macquarie Island, King Sejong, Neumayer, Dumont d’Urville, Jang Bogo and Dome Concordia) using 1-4 years of continuous observations. Context is provided for differences observed between these sites by Southern Ocean radon transects between 45-67S made by the Research Vessel Investigator. Synoptic transport of continental air within the marine boundary layer (MBL) dominated radon seasonal cycles in the mid-Southern Ocean site (Macquarie Island). MBL synoptic transport, tropospheric injection, and Antarctic outflow all contributed to the seasonal cycle at the sub-Antarctic site (King Sejong). Tropospheric subsidence and injection events delivered terrestrially-influenced air to the Southern Ocean MBL in the vicinity of the circumpolar trough (or “Polar Front”). Katabatic outflow events from Antarctica were observed to modify trace gas and aerosol characteristics of the MBL 100-200 km off the coast. Radon seasonal cycles at coastal Antarctic sites were dominated by a combination of local radon sources in summer and subsidence of terrestrially-influenced tropospheric air, whereas those on the Antarctic Plateau were primarily controlled by tropospheric subsidence. Separate characterisation of long-term marine and katabatic flow air masses at Dumont d’Urville revealed monthly mean differences in summer of up to 5 ppbv in ozone and 0.3 ng m-3 in gaseous elemental mercury. These differences were largely attributed to chemical processes on the Antarctic Plateau. A comparison of our observations with some Antarctic radon simulations by ... |
format |
Article in Journal/Newspaper |
author |
Chambers, Scott Preunkert, Susanne Weller, Rolf Hong, Sang-Bum Humphries, Ruhi S. Tositti, Laura Angot, Hélène Legrand, Michel Williams, Alastair G. Griffiths, Alan D. Crawford, Jagoda Simmons, Jack Choi, Taejin Krummel, Paul B. Molloy, Suzie Loh, Zoe Galbally, Ian Wilson, Stephen Magand, Olivier Sprovieri, Frabcesca Pirrone, Nicola Dommergue, Aurélien |
spellingShingle |
Chambers, Scott Preunkert, Susanne Weller, Rolf Hong, Sang-Bum Humphries, Ruhi S. Tositti, Laura Angot, Hélène Legrand, Michel Williams, Alastair G. Griffiths, Alan D. Crawford, Jagoda Simmons, Jack Choi, Taejin Krummel, Paul B. Molloy, Suzie Loh, Zoe Galbally, Ian Wilson, Stephen Magand, Olivier Sprovieri, Frabcesca Pirrone, Nicola Dommergue, Aurélien Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 |
author_facet |
Chambers, Scott Preunkert, Susanne Weller, Rolf Hong, Sang-Bum Humphries, Ruhi S. Tositti, Laura Angot, Hélène Legrand, Michel Williams, Alastair G. Griffiths, Alan D. Crawford, Jagoda Simmons, Jack Choi, Taejin Krummel, Paul B. Molloy, Suzie Loh, Zoe Galbally, Ian Wilson, Stephen Magand, Olivier Sprovieri, Frabcesca Pirrone, Nicola Dommergue, Aurélien |
author_sort |
Chambers, Scott |
title |
Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 |
title_short |
Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 |
title_full |
Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 |
title_fullStr |
Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 |
title_full_unstemmed |
Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 |
title_sort |
atmospheric transport pathways to antarctica and the remote southern ocean using radon-222 |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/47499/ https://epic.awi.de/id/eprint/47499/1/feart-06-00190.pdf https://hdl.handle.net/10013/epic.a238f7be-bb7b-4515-a6d5-272db03cd787 |
genre |
Antarc* Antarctic Antarctica Macquarie Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Macquarie Island Southern Ocean |
op_source |
EPIC3Frontiers in Earth Science, 6 |
op_relation |
https://epic.awi.de/id/eprint/47499/1/feart-06-00190.pdf Chambers, S. , Preunkert, S. , Weller, R. orcid:0000-0003-4880-5572 , Hong, S. B. , Humphries, R. S. , Tositti, L. , Angot, H. , Legrand, M. , Williams, A. G. , Griffiths, A. D. , Crawford, J. , Simmons, J. , Choi, T. , Krummel, P. B. , Molloy, S. , Loh, Z. , Galbally, I. , Wilson, S. , Magand, O. , Sprovieri, F. , Pirrone, N. and Dommergue, A. (2018) Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean using Radon-222 , Frontiers in Earth Science, 6 . doi:10.3389/feart.2018.00190 <https://doi.org/10.3389/feart.2018.00190> , hdl:10013/epic.a238f7be-bb7b-4515-a6d5-272db03cd787 |
op_doi |
https://doi.org/10.3389/feart.2018.00190 |
container_title |
Frontiers in Earth Science |
container_volume |
6 |
_version_ |
1810494279868481536 |