³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles
Researchers have characterized extraterrestrial (ET) helium, likely carried by interplanetary dust particles (IDPs), in deep-sea sediments spanning more than the last 100 Myr. Here we complement those low resolution and deep time studies by measuring He in modern Antarctic air and recent ice. We ana...
Published in: | Meteoritics & Planetary Science |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Meteoritical Society
2021
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Online Access: | https://authors.library.caltech.edu/112012/ https://authors.library.caltech.edu/112012/2/maps.13759.pdf https://authors.library.caltech.edu/112012/3/maps13759-sup-0001-appendixa.pdf https://authors.library.caltech.edu/112012/4/maps13759-sup-0002-appendixb.pdf https://authors.library.caltech.edu/112012/5/maps13759-sup-0003-appendixc.docx https://authors.library.caltech.edu/112012/6/maps13759-sup-0004-appendixd.docx https://resolver.caltech.edu/CaltechAUTHORS:20211123-195853267 |
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ftcaltechauth:oai:authors.library.caltech.edu:112012 2023-05-15T13:36:58+02:00 ³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles Farley, Kenneth A. Taylor, Susan Treffkorn, Jonathan Lever, James H. Gow, Anthony L. 2021-11 application/pdf application/msword https://authors.library.caltech.edu/112012/ https://authors.library.caltech.edu/112012/2/maps.13759.pdf https://authors.library.caltech.edu/112012/3/maps13759-sup-0001-appendixa.pdf https://authors.library.caltech.edu/112012/4/maps13759-sup-0002-appendixb.pdf https://authors.library.caltech.edu/112012/5/maps13759-sup-0003-appendixc.docx https://authors.library.caltech.edu/112012/6/maps13759-sup-0004-appendixd.docx https://resolver.caltech.edu/CaltechAUTHORS:20211123-195853267 en eng Meteoritical Society https://authors.library.caltech.edu/112012/2/maps.13759.pdf https://authors.library.caltech.edu/112012/3/maps13759-sup-0001-appendixa.pdf https://authors.library.caltech.edu/112012/4/maps13759-sup-0002-appendixb.pdf https://authors.library.caltech.edu/112012/5/maps13759-sup-0003-appendixc.docx https://authors.library.caltech.edu/112012/6/maps13759-sup-0004-appendixd.docx Farley, Kenneth A. and Taylor, Susan and Treffkorn, Jonathan and Lever, James H. and Gow, Anthony L. (2021) ³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles. Meteoritics and Planetary Science, 56 (11). pp. 1988-2001. ISSN 1086-9379. doi:10.1111/maps.13759. https://resolver.caltech.edu/CaltechAUTHORS:20211123-195853267 <https://resolver.caltech.edu/CaltechAUTHORS:20211123-195853267> other Article PeerReviewed 2021 ftcaltechauth https://doi.org/10.1111/maps.13759 2021-11-25T18:38:48Z Researchers have characterized extraterrestrial (ET) helium, likely carried by interplanetary dust particles (IDPs), in deep-sea sediments spanning more than the last 100 Myr. Here we complement those low resolution and deep time studies by measuring He in modern Antarctic air and recent ice. We analyzed 180 air filter samples collected in 2017 and 2018 at the South Pole and detected ³He above blank levels in 178. The filters collected during the austral springs had elevated ³He in multiple subsamples indicating the presence of many individual IDPs and potentially, a temporal variation in the ET small particle flux. Our calculated mean ³He flux of 1.4 ± 1.2 × 10⁻¹² cc STP cm⁻² ka⁻¹ is the first such measurement from air samples. We also melted, filtered, and analyzed one hundred and forty-one 1 m-long ice sections from a ˜2000-yr-old South Pole core. We detected ³He above blank levels in 139 of the 141 ice core samples and calculated an average flux of 1.2 ± 0.3 × 10⁻¹² cc STP cm⁻² ka⁻¹. Our two flux values are within a factor of two of those calculated from stratospheric IDP concentrations, those previously measured for sections of the GISP2 and Vostok ice cores, and from sediment cores from different locations and ages. The similarity of these flux values over disparate time scales (1–10⁸ yr) and geographic locations (90° S to equator) indicates modest temporal variability and remarkable agreement among diverse IDP archives. These data provide a compelling link from IDPs collected in the stratosphere to those recorded in deep time sedimentary archives. Article in Journal/Newspaper Antarc* Antarctic ice core South pole South pole Caltech Authors (California Institute of Technology) Antarctic Austral South Pole Meteoritics & Planetary Science 56 11 1988 2001 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
Researchers have characterized extraterrestrial (ET) helium, likely carried by interplanetary dust particles (IDPs), in deep-sea sediments spanning more than the last 100 Myr. Here we complement those low resolution and deep time studies by measuring He in modern Antarctic air and recent ice. We analyzed 180 air filter samples collected in 2017 and 2018 at the South Pole and detected ³He above blank levels in 178. The filters collected during the austral springs had elevated ³He in multiple subsamples indicating the presence of many individual IDPs and potentially, a temporal variation in the ET small particle flux. Our calculated mean ³He flux of 1.4 ± 1.2 × 10⁻¹² cc STP cm⁻² ka⁻¹ is the first such measurement from air samples. We also melted, filtered, and analyzed one hundred and forty-one 1 m-long ice sections from a ˜2000-yr-old South Pole core. We detected ³He above blank levels in 139 of the 141 ice core samples and calculated an average flux of 1.2 ± 0.3 × 10⁻¹² cc STP cm⁻² ka⁻¹. Our two flux values are within a factor of two of those calculated from stratospheric IDP concentrations, those previously measured for sections of the GISP2 and Vostok ice cores, and from sediment cores from different locations and ages. The similarity of these flux values over disparate time scales (1–10⁸ yr) and geographic locations (90° S to equator) indicates modest temporal variability and remarkable agreement among diverse IDP archives. These data provide a compelling link from IDPs collected in the stratosphere to those recorded in deep time sedimentary archives. |
format |
Article in Journal/Newspaper |
author |
Farley, Kenneth A. Taylor, Susan Treffkorn, Jonathan Lever, James H. Gow, Anthony L. |
spellingShingle |
Farley, Kenneth A. Taylor, Susan Treffkorn, Jonathan Lever, James H. Gow, Anthony L. ³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles |
author_facet |
Farley, Kenneth A. Taylor, Susan Treffkorn, Jonathan Lever, James H. Gow, Anthony L. |
author_sort |
Farley, Kenneth A. |
title |
³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles |
title_short |
³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles |
title_full |
³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles |
title_fullStr |
³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles |
title_full_unstemmed |
³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles |
title_sort |
³he flux obtained from south pole air and snow-ice and its connection to interplanetary dust particles |
publisher |
Meteoritical Society |
publishDate |
2021 |
url |
https://authors.library.caltech.edu/112012/ https://authors.library.caltech.edu/112012/2/maps.13759.pdf https://authors.library.caltech.edu/112012/3/maps13759-sup-0001-appendixa.pdf https://authors.library.caltech.edu/112012/4/maps13759-sup-0002-appendixb.pdf https://authors.library.caltech.edu/112012/5/maps13759-sup-0003-appendixc.docx https://authors.library.caltech.edu/112012/6/maps13759-sup-0004-appendixd.docx https://resolver.caltech.edu/CaltechAUTHORS:20211123-195853267 |
geographic |
Antarctic Austral South Pole |
geographic_facet |
Antarctic Austral South Pole |
genre |
Antarc* Antarctic ice core South pole South pole |
genre_facet |
Antarc* Antarctic ice core South pole South pole |
op_relation |
https://authors.library.caltech.edu/112012/2/maps.13759.pdf https://authors.library.caltech.edu/112012/3/maps13759-sup-0001-appendixa.pdf https://authors.library.caltech.edu/112012/4/maps13759-sup-0002-appendixb.pdf https://authors.library.caltech.edu/112012/5/maps13759-sup-0003-appendixc.docx https://authors.library.caltech.edu/112012/6/maps13759-sup-0004-appendixd.docx Farley, Kenneth A. and Taylor, Susan and Treffkorn, Jonathan and Lever, James H. and Gow, Anthony L. (2021) ³He flux obtained from South Pole air and snow-ice and its connection to interplanetary dust particles. Meteoritics and Planetary Science, 56 (11). pp. 1988-2001. ISSN 1086-9379. doi:10.1111/maps.13759. https://resolver.caltech.edu/CaltechAUTHORS:20211123-195853267 <https://resolver.caltech.edu/CaltechAUTHORS:20211123-195853267> |
op_rights |
other |
op_doi |
https://doi.org/10.1111/maps.13759 |
container_title |
Meteoritics & Planetary Science |
container_volume |
56 |
container_issue |
11 |
container_start_page |
1988 |
op_container_end_page |
2001 |
_version_ |
1766086263895490560 |