Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice
We describe the use of synchrotron-based X-ray fluorescence spectroscopy to examine the microstructural location of specific elements, primarily salts, in sea ice. This work was part of an investigation of the location of bromine in the sea ice-snowpack-blowing snow system, where it plays a part in...
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ftdartmouthcoll:oai:digitalcommons.dartmouth.edu:facoa-1237 2023-07-16T03:54:04+02:00 Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice Obbard, Rachel W Lieb-Lappen, Ross M Nordick, Katherine V Golden, Ellyn J Leonard, Jeremiah R Lanzirotti, Antonio Newville, Mathew G 2016-11-01T07:00:00Z https://digitalcommons.dartmouth.edu/facoa/236 https://doi.org/10.1002/2016EA000172 unknown Dartmouth Digital Commons https://digitalcommons.dartmouth.edu/facoa/236 doi:10.1002/2016EA000172 https://doi.org/10.1002/2016EA000172 Dartmouth Scholarship raman-spectroscopy polar sunrise frost flowers platelet ice salinity snow microstructure chemistry bromine release sea ice synchrotron x-ray fluorescence spectroscopy Earth Sciences Geology Physical Sciences and Mathematics text 2016 ftdartmouthcoll https://doi.org/10.1002/2016EA000172 2023-06-28T10:42:52Z We describe the use of synchrotron-based X-ray fluorescence spectroscopy to examine the microstructural location of specific elements, primarily salts, in sea ice. This work was part of an investigation of the location of bromine in the sea ice-snowpack-blowing snow system, where it plays a part in the heterogeneous chemistry that contributes to tropospheric ozone depletion episodes. We analyzed samples at beamline 13-ID-E of the Advanced Photon Source at Argonne National Laboratory. Using an 18keV incident energy beam, we produced elemental maps of salts for sea ice samples from the Ross Sea, Antarctica. The distribution of salts in sea ice depends on ice type. In our columnar ice samples, Br was located in parallel lines spaced roughly 0.5mm apart, corresponding to the spacing of lamellae in the skeletal region during initial ice growth. The maps revealed concentrations of Br in linear features in samples from all but the topmost and bottommost depths. For those samples, the maps revealed rounded features. Calibration of the Br elemental maps showed bulk concentrations to be 5-10g/m(3), with concentrations ten times larger in the linear features. Through comparison with horizontal thin sections, we could verify that these linear features were brine sheets or layers. Text Antarc* Antarctica Ross Sea Sea ice Dartmouth Digital Commons (Dartmouth College) Ross Sea Earth and Space Science 3 11 463 479 |
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Dartmouth Digital Commons (Dartmouth College) |
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ftdartmouthcoll |
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topic |
raman-spectroscopy polar sunrise frost flowers platelet ice salinity snow microstructure chemistry bromine release sea ice synchrotron x-ray fluorescence spectroscopy Earth Sciences Geology Physical Sciences and Mathematics |
spellingShingle |
raman-spectroscopy polar sunrise frost flowers platelet ice salinity snow microstructure chemistry bromine release sea ice synchrotron x-ray fluorescence spectroscopy Earth Sciences Geology Physical Sciences and Mathematics Obbard, Rachel W Lieb-Lappen, Ross M Nordick, Katherine V Golden, Ellyn J Leonard, Jeremiah R Lanzirotti, Antonio Newville, Mathew G Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice |
topic_facet |
raman-spectroscopy polar sunrise frost flowers platelet ice salinity snow microstructure chemistry bromine release sea ice synchrotron x-ray fluorescence spectroscopy Earth Sciences Geology Physical Sciences and Mathematics |
description |
We describe the use of synchrotron-based X-ray fluorescence spectroscopy to examine the microstructural location of specific elements, primarily salts, in sea ice. This work was part of an investigation of the location of bromine in the sea ice-snowpack-blowing snow system, where it plays a part in the heterogeneous chemistry that contributes to tropospheric ozone depletion episodes. We analyzed samples at beamline 13-ID-E of the Advanced Photon Source at Argonne National Laboratory. Using an 18keV incident energy beam, we produced elemental maps of salts for sea ice samples from the Ross Sea, Antarctica. The distribution of salts in sea ice depends on ice type. In our columnar ice samples, Br was located in parallel lines spaced roughly 0.5mm apart, corresponding to the spacing of lamellae in the skeletal region during initial ice growth. The maps revealed concentrations of Br in linear features in samples from all but the topmost and bottommost depths. For those samples, the maps revealed rounded features. Calibration of the Br elemental maps showed bulk concentrations to be 5-10g/m(3), with concentrations ten times larger in the linear features. Through comparison with horizontal thin sections, we could verify that these linear features were brine sheets or layers. |
format |
Text |
author |
Obbard, Rachel W Lieb-Lappen, Ross M Nordick, Katherine V Golden, Ellyn J Leonard, Jeremiah R Lanzirotti, Antonio Newville, Mathew G |
author_facet |
Obbard, Rachel W Lieb-Lappen, Ross M Nordick, Katherine V Golden, Ellyn J Leonard, Jeremiah R Lanzirotti, Antonio Newville, Mathew G |
author_sort |
Obbard, Rachel W |
title |
Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice |
title_short |
Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice |
title_full |
Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice |
title_fullStr |
Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice |
title_full_unstemmed |
Synchrotron X-ray fluorescence spectroscopy of salts in natural sea ice |
title_sort |
synchrotron x-ray fluorescence spectroscopy of salts in natural sea ice |
publisher |
Dartmouth Digital Commons |
publishDate |
2016 |
url |
https://digitalcommons.dartmouth.edu/facoa/236 https://doi.org/10.1002/2016EA000172 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Ross Sea Sea ice |
op_source |
Dartmouth Scholarship |
op_relation |
https://digitalcommons.dartmouth.edu/facoa/236 doi:10.1002/2016EA000172 https://doi.org/10.1002/2016EA000172 |
op_doi |
https://doi.org/10.1002/2016EA000172 |
container_title |
Earth and Space Science |
container_volume |
3 |
container_issue |
11 |
container_start_page |
463 |
op_container_end_page |
479 |
_version_ |
1771551284620427264 |