Particle shape accounts for instrumental discrepancy in ice core dust size distributions
The Klotz Abakus laser sensor and the Coulter Counter are both used for measuring the size distribution of insoluble mineral dust particles in ice cores. While the Coulter Counter measures particle volume accurately, the equivalent Abakus instrument measurement deviates substantially from the Coulte...
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Online Access: | http://hdl.handle.net/2434/613623 https://doi.org/10.5194/cp-14-601-2018 |
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ftunivmilanoair:oai:air.unimi.it:2434/613623 2024-02-11T10:04:46+01:00 Particle shape accounts for instrumental discrepancy in ice core dust size distributions Simonsen, Marius Folden Cremonesi, Llorenç Baccolo, Giovanni Bosch, Samuel Delmonte, Barbara Erhardt, Tobias Kjær, Helle Astrid Potenza, Marco Svensson, Anders Vallelonga, Paul M.F. Simonsen L. Cremonesi G. Baccolo S. Bosch B. Delmonte T. Erhardt H.A. Kjær M. Potenza A. Svensson P. Vallelonga 2018-05-03 http://hdl.handle.net/2434/613623 https://doi.org/10.5194/cp-14-601-2018 eng eng Copernicus info:eu-repo/semantics/altIdentifier/wos/WOS:000431447200002 volume:14 issue:5 firstpage:601 lastpage:608 numberofpages:8 journal:CLIMATE OF THE PAST DISCUSSIONS http://hdl.handle.net/2434/613623 doi:10.5194/cp-14-601-2018 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85046749966 info:eu-repo/semantics/openAccess Settore FIS/03 - Fisica della Materia info:eu-repo/semantics/article 2018 ftunivmilanoair https://doi.org/10.5194/cp-14-601-2018 2024-01-23T23:35:29Z The Klotz Abakus laser sensor and the Coulter Counter are both used for measuring the size distribution of insoluble mineral dust particles in ice cores. While the Coulter Counter measures particle volume accurately, the equivalent Abakus instrument measurement deviates substantially from the Coulter Counter depending on the type of sample. We show that the difference between the Abakus and the Coulter Counter measurements is mainly caused by the irregular shape of dust particles in 5 ice core samples. The irregular shape leads means that the calibration routine based on standard spheres must be adjusted. This new calibration routine gives an increased accuracy on Abakus measurements, which may improve future ice core record intercomparisons. We derived an analytical model for extracting the aspect ratio of dust particles from the difference between Abakus and Coulter Counter data. For verification, we measured the aspect ratio of the same samples directly using a Single Particle Extinction and Scattering Instrument. The results demonstrate that the model is accurate enough to discern between 10 samples of aspect ratio 0.3 and 0.4 using only the comparison of Abakus and Coulter Counter data. Article in Journal/Newspaper ice core The University of Milan: Archivio Istituzionale della Ricerca (AIR) Coulter ENVELOPE(-58.033,-58.033,-83.283,-83.283) Climate of the Past 14 5 601 608 |
institution |
Open Polar |
collection |
The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
Settore FIS/03 - Fisica della Materia |
spellingShingle |
Settore FIS/03 - Fisica della Materia Simonsen, Marius Folden Cremonesi, Llorenç Baccolo, Giovanni Bosch, Samuel Delmonte, Barbara Erhardt, Tobias Kjær, Helle Astrid Potenza, Marco Svensson, Anders Vallelonga, Paul Particle shape accounts for instrumental discrepancy in ice core dust size distributions |
topic_facet |
Settore FIS/03 - Fisica della Materia |
description |
The Klotz Abakus laser sensor and the Coulter Counter are both used for measuring the size distribution of insoluble mineral dust particles in ice cores. While the Coulter Counter measures particle volume accurately, the equivalent Abakus instrument measurement deviates substantially from the Coulter Counter depending on the type of sample. We show that the difference between the Abakus and the Coulter Counter measurements is mainly caused by the irregular shape of dust particles in 5 ice core samples. The irregular shape leads means that the calibration routine based on standard spheres must be adjusted. This new calibration routine gives an increased accuracy on Abakus measurements, which may improve future ice core record intercomparisons. We derived an analytical model for extracting the aspect ratio of dust particles from the difference between Abakus and Coulter Counter data. For verification, we measured the aspect ratio of the same samples directly using a Single Particle Extinction and Scattering Instrument. The results demonstrate that the model is accurate enough to discern between 10 samples of aspect ratio 0.3 and 0.4 using only the comparison of Abakus and Coulter Counter data. |
author2 |
M.F. Simonsen L. Cremonesi G. Baccolo S. Bosch B. Delmonte T. Erhardt H.A. Kjær M. Potenza A. Svensson P. Vallelonga |
format |
Article in Journal/Newspaper |
author |
Simonsen, Marius Folden Cremonesi, Llorenç Baccolo, Giovanni Bosch, Samuel Delmonte, Barbara Erhardt, Tobias Kjær, Helle Astrid Potenza, Marco Svensson, Anders Vallelonga, Paul |
author_facet |
Simonsen, Marius Folden Cremonesi, Llorenç Baccolo, Giovanni Bosch, Samuel Delmonte, Barbara Erhardt, Tobias Kjær, Helle Astrid Potenza, Marco Svensson, Anders Vallelonga, Paul |
author_sort |
Simonsen, Marius Folden |
title |
Particle shape accounts for instrumental discrepancy in ice core dust size distributions |
title_short |
Particle shape accounts for instrumental discrepancy in ice core dust size distributions |
title_full |
Particle shape accounts for instrumental discrepancy in ice core dust size distributions |
title_fullStr |
Particle shape accounts for instrumental discrepancy in ice core dust size distributions |
title_full_unstemmed |
Particle shape accounts for instrumental discrepancy in ice core dust size distributions |
title_sort |
particle shape accounts for instrumental discrepancy in ice core dust size distributions |
publisher |
Copernicus |
publishDate |
2018 |
url |
http://hdl.handle.net/2434/613623 https://doi.org/10.5194/cp-14-601-2018 |
long_lat |
ENVELOPE(-58.033,-58.033,-83.283,-83.283) |
geographic |
Coulter |
geographic_facet |
Coulter |
genre |
ice core |
genre_facet |
ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000431447200002 volume:14 issue:5 firstpage:601 lastpage:608 numberofpages:8 journal:CLIMATE OF THE PAST DISCUSSIONS http://hdl.handle.net/2434/613623 doi:10.5194/cp-14-601-2018 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85046749966 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-14-601-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
5 |
container_start_page |
601 |
op_container_end_page |
608 |
_version_ |
1790601501426581504 |