Particles and iodine compounds in coastal Antarctica
Aerosol particle number concentrations have been measured at Halley and Neumayer on the Antarctic coast, since 2004 and 1984, respectively. Sulphur compounds known to be implicated in particle formation and growth were independently measured: sulphate ions and methane sulphonic acid in filtered aero...
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ftawi:oai:epic.awi.de:38489 2024-09-15T17:41:09+00:00 Particles and iodine compounds in coastal Antarctica Roscoe, H. K. Jones, A. E. Brough, N. Weller, Rolf Saiz-Lopez, Alfonso Mahajan, Anoop S. Schönhardt, A. Burrows, J. P. Fleming, Zoe L. 2015-07-03 application/pdf https://epic.awi.de/id/eprint/38489/ https://epic.awi.de/id/eprint/38489/1/jgrd52315.pdf https://hdl.handle.net/10013/epic.45953 https://hdl.handle.net/10013/epic.45953.d001 unknown Wiley https://epic.awi.de/id/eprint/38489/1/jgrd52315.pdf https://hdl.handle.net/10013/epic.45953.d001 Roscoe, H. K. , Jones, A. E. , Brough, N. , Weller, R. orcid:0000-0003-4880-5572 , Saiz-Lopez, A. , Mahajan, A. S. , Schönhardt, A. , Burrows, J. P. and Fleming, Z. L. (2015) Particles and iodine compounds in coastal Antarctica , Journal of Geophysical Research-Atmospheres, 120 , pp. 7144-7156 . doi:10.1002/2015JD023301 <https://doi.org/10.1002/2015JD023301> , hdl:10013/epic.45953 EPIC3Journal of Geophysical Research-Atmospheres, Wiley, 120, pp. 7144-7156, ISSN: 0148-0227 Article isiRev 2015 ftawi https://doi.org/10.1002/2015JD023301 2024-06-24T04:12:21Z Aerosol particle number concentrations have been measured at Halley and Neumayer on the Antarctic coast, since 2004 and 1984, respectively. Sulphur compounds known to be implicated in particle formation and growth were independently measured: sulphate ions and methane sulphonic acid in filtered aerosol samples and gas phase dimethyl sulphide for limited periods. Iodine oxide, IO, was determined by a satellite sensor from 2003 to 2009 and by different ground-based sensors at Halley in 2004 and 2007. Previous model results and midlatitude observations show that iodine compounds consistent with the large values of IO observed may be responsible for an increase in number concentrations of small particles. Coastal Antarctica is useful for investigating correlations between particles, sulphur, and iodine compounds, because of their large annual cycles and the source of iodine compounds in sea ice. After smoothing all the measured data by several days, the shapes of the annual cycles in particle concentration at Halley and Neumayer are approximated by linear combinations of the shapes of sulphur compounds and IO but not by sulphur compounds alone. However, there is no short-term correlation between IO and particle concentration. The apparent correlation by eye after smoothing but not in the short term suggests that iodine compounds and particles are sourced some distance offshore. This suggests that new particles formed from iodine compounds are viable, i.e., they can last long enough to grow to the larger particles that contribute to cloud condensation nuclei, rather than being simply collected by existing particles. If so, there is significant potential for climate feedback near the sea ice zone via the aerosol indirect effect. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antarctica Journal Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Atmospheres 120 14 7144 7156 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Aerosol particle number concentrations have been measured at Halley and Neumayer on the Antarctic coast, since 2004 and 1984, respectively. Sulphur compounds known to be implicated in particle formation and growth were independently measured: sulphate ions and methane sulphonic acid in filtered aerosol samples and gas phase dimethyl sulphide for limited periods. Iodine oxide, IO, was determined by a satellite sensor from 2003 to 2009 and by different ground-based sensors at Halley in 2004 and 2007. Previous model results and midlatitude observations show that iodine compounds consistent with the large values of IO observed may be responsible for an increase in number concentrations of small particles. Coastal Antarctica is useful for investigating correlations between particles, sulphur, and iodine compounds, because of their large annual cycles and the source of iodine compounds in sea ice. After smoothing all the measured data by several days, the shapes of the annual cycles in particle concentration at Halley and Neumayer are approximated by linear combinations of the shapes of sulphur compounds and IO but not by sulphur compounds alone. However, there is no short-term correlation between IO and particle concentration. The apparent correlation by eye after smoothing but not in the short term suggests that iodine compounds and particles are sourced some distance offshore. This suggests that new particles formed from iodine compounds are viable, i.e., they can last long enough to grow to the larger particles that contribute to cloud condensation nuclei, rather than being simply collected by existing particles. If so, there is significant potential for climate feedback near the sea ice zone via the aerosol indirect effect. |
format |
Article in Journal/Newspaper |
author |
Roscoe, H. K. Jones, A. E. Brough, N. Weller, Rolf Saiz-Lopez, Alfonso Mahajan, Anoop S. Schönhardt, A. Burrows, J. P. Fleming, Zoe L. |
spellingShingle |
Roscoe, H. K. Jones, A. E. Brough, N. Weller, Rolf Saiz-Lopez, Alfonso Mahajan, Anoop S. Schönhardt, A. Burrows, J. P. Fleming, Zoe L. Particles and iodine compounds in coastal Antarctica |
author_facet |
Roscoe, H. K. Jones, A. E. Brough, N. Weller, Rolf Saiz-Lopez, Alfonso Mahajan, Anoop S. Schönhardt, A. Burrows, J. P. Fleming, Zoe L. |
author_sort |
Roscoe, H. K. |
title |
Particles and iodine compounds in coastal Antarctica |
title_short |
Particles and iodine compounds in coastal Antarctica |
title_full |
Particles and iodine compounds in coastal Antarctica |
title_fullStr |
Particles and iodine compounds in coastal Antarctica |
title_full_unstemmed |
Particles and iodine compounds in coastal Antarctica |
title_sort |
particles and iodine compounds in coastal antarctica |
publisher |
Wiley |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/38489/ https://epic.awi.de/id/eprint/38489/1/jgrd52315.pdf https://hdl.handle.net/10013/epic.45953 https://hdl.handle.net/10013/epic.45953.d001 |
genre |
Antarc* Antarctic Antarctica Antarctica Journal Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal Sea ice |
op_source |
EPIC3Journal of Geophysical Research-Atmospheres, Wiley, 120, pp. 7144-7156, ISSN: 0148-0227 |
op_relation |
https://epic.awi.de/id/eprint/38489/1/jgrd52315.pdf https://hdl.handle.net/10013/epic.45953.d001 Roscoe, H. K. , Jones, A. E. , Brough, N. , Weller, R. orcid:0000-0003-4880-5572 , Saiz-Lopez, A. , Mahajan, A. S. , Schönhardt, A. , Burrows, J. P. and Fleming, Z. L. (2015) Particles and iodine compounds in coastal Antarctica , Journal of Geophysical Research-Atmospheres, 120 , pp. 7144-7156 . doi:10.1002/2015JD023301 <https://doi.org/10.1002/2015JD023301> , hdl:10013/epic.45953 |
op_doi |
https://doi.org/10.1002/2015JD023301 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
14 |
container_start_page |
7144 |
op_container_end_page |
7156 |
_version_ |
1810487256692031488 |