Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core
Nitrate (NO3-), an abundant aerosol in polar snow, is a complex environmental proxy to interpret owing to its diverse sources and susceptibility to post-depositional processes. During the last glacial period, when dust concentrations in the Antarctic ice were upto similar to 50 times than today, min...
Published in: | Global and Planetary Change |
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Language: | English |
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2022
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Online Access: | https://curis.ku.dk/portal/da/publications/role-of-mineral-dust-in-the-nitrate-preservation-during-the-glacial-period(78a67960-a2d8-4f75-b87e-cc892ead4cbf).html https://doi.org/10.1016/j.gloplacha.2022.103745 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/78a67960-a2d8-4f75-b87e-cc892ead4cbf 2024-06-09T07:39:18+00:00 Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core Venugopal, Abhijith U. Bertler, Nancy A. N. Pyne, Rebecca L. Kjaer, Helle A. Winton, V. Holly L. Mayewski, Paul A. Cortese, Giuseppe 2022-02-01 https://curis.ku.dk/portal/da/publications/role-of-mineral-dust-in-the-nitrate-preservation-during-the-glacial-period(78a67960-a2d8-4f75-b87e-cc892ead4cbf).html https://doi.org/10.1016/j.gloplacha.2022.103745 eng eng info:eu-repo/semantics/closedAccess Venugopal , A U , Bertler , N A N , Pyne , R L , Kjaer , H A , Winton , V H L , Mayewski , P A & Cortese , G 2022 , ' Role of mineral dust in the nitrate preservation during the glacial period : Insights from the RICE ice core ' , Global and Planetary Change , vol. 209 , 103745 . https://doi.org/10.1016/j.gloplacha.2022.103745 RICE ice core Last glacial period Mineral dust-nitrate coupling Nitrate scavenging Atmospheric process A new coastal record CONTINUOUS-FLOW ANALYSIS DOME C NITRIC-ACID ISOTOPIC CONSTRAINTS SCALE VARIABILITY ROOSEVELT ISLAND SOUTHERN-OCEAN ROSS SEA SNOW ANTARCTICA article 2022 ftcopenhagenunip https://doi.org/10.1016/j.gloplacha.2022.103745 2024-05-16T11:29:23Z Nitrate (NO3-), an abundant aerosol in polar snow, is a complex environmental proxy to interpret owing to its diverse sources and susceptibility to post-depositional processes. During the last glacial period, when dust concentrations in the Antarctic ice were upto similar to 50 times than today, mineral dust appears to have a stabilizing effect on the NO3- concentration in snow. However, the mechanism leading to the stabilization remains unclear. Here, we present the new and highly resolved records of NO3- and non-sea salt calcium (nssCa(2+), a proxy for mineral dust) from the Roosevelt Island Climate Evolution (RICE) ice core. We focus on the glacial period from 83 to 26 kilo years Before Present (ka BP). The data show a statistically significant correlation between NO3- and nssCa(2+) over this period. To put our findings into a spatial context, we compare RICE data with existing records from east Antarctica (EPICA Dome C [EDC], Vostok and central Dome Fuji) and West Antarctica (West Antarctic Ice Sheet Divide Ice Core [WDC]). Spatial analysis suggests that nssCa(2+) is contributing to the effective scavenging of NO3- from the atmosphere perhaps through the formation of calcium nitrate (Ca(NO3)(2)). The geographic pattern implies that the process of Ca(NO3)(2) formation occurs during the long-distance transport of mineral dust from mid-latitude source regions by Southern Hemisphere Westerly Winds (SHWW). The data also suggest that the correlation observed at various Antarctic locations may depend on the level of dust reaching the sites from the mid-latitude sources. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Roosevelt Island Ross Sea Southern Ocean West Antarctica University of Copenhagen: Research Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) East Antarctica Roosevelt Island ENVELOPE(-162.000,-162.000,-79.283,-79.283) Ross Sea Southern Ocean The Antarctic West Antarctic Ice Sheet West Antarctica Global and Planetary Change 209 103745 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
RICE ice core Last glacial period Mineral dust-nitrate coupling Nitrate scavenging Atmospheric process A new coastal record CONTINUOUS-FLOW ANALYSIS DOME C NITRIC-ACID ISOTOPIC CONSTRAINTS SCALE VARIABILITY ROOSEVELT ISLAND SOUTHERN-OCEAN ROSS SEA SNOW ANTARCTICA |
spellingShingle |
RICE ice core Last glacial period Mineral dust-nitrate coupling Nitrate scavenging Atmospheric process A new coastal record CONTINUOUS-FLOW ANALYSIS DOME C NITRIC-ACID ISOTOPIC CONSTRAINTS SCALE VARIABILITY ROOSEVELT ISLAND SOUTHERN-OCEAN ROSS SEA SNOW ANTARCTICA Venugopal, Abhijith U. Bertler, Nancy A. N. Pyne, Rebecca L. Kjaer, Helle A. Winton, V. Holly L. Mayewski, Paul A. Cortese, Giuseppe Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core |
topic_facet |
RICE ice core Last glacial period Mineral dust-nitrate coupling Nitrate scavenging Atmospheric process A new coastal record CONTINUOUS-FLOW ANALYSIS DOME C NITRIC-ACID ISOTOPIC CONSTRAINTS SCALE VARIABILITY ROOSEVELT ISLAND SOUTHERN-OCEAN ROSS SEA SNOW ANTARCTICA |
description |
Nitrate (NO3-), an abundant aerosol in polar snow, is a complex environmental proxy to interpret owing to its diverse sources and susceptibility to post-depositional processes. During the last glacial period, when dust concentrations in the Antarctic ice were upto similar to 50 times than today, mineral dust appears to have a stabilizing effect on the NO3- concentration in snow. However, the mechanism leading to the stabilization remains unclear. Here, we present the new and highly resolved records of NO3- and non-sea salt calcium (nssCa(2+), a proxy for mineral dust) from the Roosevelt Island Climate Evolution (RICE) ice core. We focus on the glacial period from 83 to 26 kilo years Before Present (ka BP). The data show a statistically significant correlation between NO3- and nssCa(2+) over this period. To put our findings into a spatial context, we compare RICE data with existing records from east Antarctica (EPICA Dome C [EDC], Vostok and central Dome Fuji) and West Antarctica (West Antarctic Ice Sheet Divide Ice Core [WDC]). Spatial analysis suggests that nssCa(2+) is contributing to the effective scavenging of NO3- from the atmosphere perhaps through the formation of calcium nitrate (Ca(NO3)(2)). The geographic pattern implies that the process of Ca(NO3)(2) formation occurs during the long-distance transport of mineral dust from mid-latitude source regions by Southern Hemisphere Westerly Winds (SHWW). The data also suggest that the correlation observed at various Antarctic locations may depend on the level of dust reaching the sites from the mid-latitude sources. |
format |
Article in Journal/Newspaper |
author |
Venugopal, Abhijith U. Bertler, Nancy A. N. Pyne, Rebecca L. Kjaer, Helle A. Winton, V. Holly L. Mayewski, Paul A. Cortese, Giuseppe |
author_facet |
Venugopal, Abhijith U. Bertler, Nancy A. N. Pyne, Rebecca L. Kjaer, Helle A. Winton, V. Holly L. Mayewski, Paul A. Cortese, Giuseppe |
author_sort |
Venugopal, Abhijith U. |
title |
Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core |
title_short |
Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core |
title_full |
Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core |
title_fullStr |
Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core |
title_full_unstemmed |
Role of mineral dust in the nitrate preservation during the glacial period:Insights from the RICE ice core |
title_sort |
role of mineral dust in the nitrate preservation during the glacial period:insights from the rice ice core |
publishDate |
2022 |
url |
https://curis.ku.dk/portal/da/publications/role-of-mineral-dust-in-the-nitrate-preservation-during-the-glacial-period(78a67960-a2d8-4f75-b87e-cc892ead4cbf).html https://doi.org/10.1016/j.gloplacha.2022.103745 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(-162.000,-162.000,-79.283,-79.283) |
geographic |
Antarctic Dome Fuji East Antarctica Roosevelt Island Ross Sea Southern Ocean The Antarctic West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Antarctic Dome Fuji East Antarctica Roosevelt Island Ross Sea Southern Ocean The Antarctic West Antarctic Ice Sheet West Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Roosevelt Island Ross Sea Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Roosevelt Island Ross Sea Southern Ocean West Antarctica |
op_source |
Venugopal , A U , Bertler , N A N , Pyne , R L , Kjaer , H A , Winton , V H L , Mayewski , P A & Cortese , G 2022 , ' Role of mineral dust in the nitrate preservation during the glacial period : Insights from the RICE ice core ' , Global and Planetary Change , vol. 209 , 103745 . https://doi.org/10.1016/j.gloplacha.2022.103745 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2022.103745 |
container_title |
Global and Planetary Change |
container_volume |
209 |
container_start_page |
103745 |
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1801378573752205312 |