Calcium and sodium concentrations of the Talos Dome ice core, Antarctica
In this study we report on new non-sea salt calcium (nssCa2+, mineral dust proxy) and sea salt sodium (ssNa+, sea ice proxy) records along the East Antarctic Talos Dome deep ice core in centennial resolution reaching back 150 thousand years (ka) before present. During glacial conditions nssCa2+ flux...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.833044 2024-09-15T17:42:36+00:00 Calcium and sodium concentrations of the Talos Dome ice core, Antarctica Schüpbach, Simon Federer, Urs Kaufmann, Patrik R Albani, Samuel Barbante, Carlo Stocker, Thomas F Fischer, Hubertus LATITUDE: -72.817000 * LONGITUDE: 159.183000 * DATE/TIME START: 2005-01-01T00:00:00 * DATE/TIME END: 2005-01-01T00:00:00 * MINIMUM DEPTH, ice/snow: 305.025 m * MAXIMUM DEPTH, ice/snow: 1434.575 m 2014 text/tab-separated-values, 192552 data points https://doi.pangaea.de/10.1594/PANGAEA.833044 https://doi.org/10.1594/PANGAEA.833044 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.833044 https://doi.org/10.1594/PANGAEA.833044 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Schüpbach, Simon; Federer, Urs; Kaufmann, Patrik R; Albani, Samuel; Barbante, Carlo; Stocker, Thomas F; Fischer, Hubertus (2013): High-resolution mineral dust and sea ice proxy records from the Talos Dome ice core. Climate of the Past, 9(6), 2789-2807, https://doi.org/10.5194/cp-9-2789-2013 AGE Calcium CFA Continuous Flow Analysis DEPTH ice/snow ICEDRILL Ice drill Sodium ion TALDICE Talos_Dome dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.83304410.5194/cp-9-2789-2013 2024-07-24T02:31:32Z In this study we report on new non-sea salt calcium (nssCa2+, mineral dust proxy) and sea salt sodium (ssNa+, sea ice proxy) records along the East Antarctic Talos Dome deep ice core in centennial resolution reaching back 150 thousand years (ka) before present. During glacial conditions nssCa2+ fluxes in Talos Dome are strongly related to temperature as has been observed before in other deep Antarctic ice core records, and has been associated with synchronous changes in the main source region (southern South America) during climate variations in the last glacial. However, during warmer climate conditions Talos Dome mineral dust input is clearly elevated compared to other records mainly due to the contribution of additional local dust sources in the Ross Sea area. Based on a simple transport model, we compare nssCa2+ fluxes of different East Antarctic ice cores. From this multi-site comparison we conclude that changes in transport efficiency or atmospheric lifetime of dust particles do have a minor effect compared to source strength changes on the large-scale concentration changes observed in Antarctic ice cores during climate variations of the past 150 ka. Our transport model applied on ice core data is further validated by climate model data. The availability of multiple East Antarctic nssCa2+ records also allows for a revision of a former estimate on the atmospheric CO2 sensitivity to reduced dust induced iron fertilisation in the Southern Ocean during the transition from the Last Glacial Maximum to the Holocene (T1). While a former estimate based on the EPICA Dome C (EDC) record only suggested 20 ppm, we find that reduced dust induced iron fertilisation in the Southern Ocean may be responsible for up to 40 ppm of the total atmospheric CO2 increase during T1. During the last interglacial, ssNa+ levels of EDC and EPICA Dronning Maud Land (EDML) are only half of the Holocene levels, in line with higher temperatures during that period, indicating much reduced sea ice extent in the Atlantic as well as the Indian ... Dataset Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Ross Sea Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(159.183000,159.183000,-72.817000,-72.817000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AGE Calcium CFA Continuous Flow Analysis DEPTH ice/snow ICEDRILL Ice drill Sodium ion TALDICE Talos_Dome |
spellingShingle |
AGE Calcium CFA Continuous Flow Analysis DEPTH ice/snow ICEDRILL Ice drill Sodium ion TALDICE Talos_Dome Schüpbach, Simon Federer, Urs Kaufmann, Patrik R Albani, Samuel Barbante, Carlo Stocker, Thomas F Fischer, Hubertus Calcium and sodium concentrations of the Talos Dome ice core, Antarctica |
topic_facet |
AGE Calcium CFA Continuous Flow Analysis DEPTH ice/snow ICEDRILL Ice drill Sodium ion TALDICE Talos_Dome |
description |
In this study we report on new non-sea salt calcium (nssCa2+, mineral dust proxy) and sea salt sodium (ssNa+, sea ice proxy) records along the East Antarctic Talos Dome deep ice core in centennial resolution reaching back 150 thousand years (ka) before present. During glacial conditions nssCa2+ fluxes in Talos Dome are strongly related to temperature as has been observed before in other deep Antarctic ice core records, and has been associated with synchronous changes in the main source region (southern South America) during climate variations in the last glacial. However, during warmer climate conditions Talos Dome mineral dust input is clearly elevated compared to other records mainly due to the contribution of additional local dust sources in the Ross Sea area. Based on a simple transport model, we compare nssCa2+ fluxes of different East Antarctic ice cores. From this multi-site comparison we conclude that changes in transport efficiency or atmospheric lifetime of dust particles do have a minor effect compared to source strength changes on the large-scale concentration changes observed in Antarctic ice cores during climate variations of the past 150 ka. Our transport model applied on ice core data is further validated by climate model data. The availability of multiple East Antarctic nssCa2+ records also allows for a revision of a former estimate on the atmospheric CO2 sensitivity to reduced dust induced iron fertilisation in the Southern Ocean during the transition from the Last Glacial Maximum to the Holocene (T1). While a former estimate based on the EPICA Dome C (EDC) record only suggested 20 ppm, we find that reduced dust induced iron fertilisation in the Southern Ocean may be responsible for up to 40 ppm of the total atmospheric CO2 increase during T1. During the last interglacial, ssNa+ levels of EDC and EPICA Dronning Maud Land (EDML) are only half of the Holocene levels, in line with higher temperatures during that period, indicating much reduced sea ice extent in the Atlantic as well as the Indian ... |
format |
Dataset |
author |
Schüpbach, Simon Federer, Urs Kaufmann, Patrik R Albani, Samuel Barbante, Carlo Stocker, Thomas F Fischer, Hubertus |
author_facet |
Schüpbach, Simon Federer, Urs Kaufmann, Patrik R Albani, Samuel Barbante, Carlo Stocker, Thomas F Fischer, Hubertus |
author_sort |
Schüpbach, Simon |
title |
Calcium and sodium concentrations of the Talos Dome ice core, Antarctica |
title_short |
Calcium and sodium concentrations of the Talos Dome ice core, Antarctica |
title_full |
Calcium and sodium concentrations of the Talos Dome ice core, Antarctica |
title_fullStr |
Calcium and sodium concentrations of the Talos Dome ice core, Antarctica |
title_full_unstemmed |
Calcium and sodium concentrations of the Talos Dome ice core, Antarctica |
title_sort |
calcium and sodium concentrations of the talos dome ice core, antarctica |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.833044 https://doi.org/10.1594/PANGAEA.833044 |
op_coverage |
LATITUDE: -72.817000 * LONGITUDE: 159.183000 * DATE/TIME START: 2005-01-01T00:00:00 * DATE/TIME END: 2005-01-01T00:00:00 * MINIMUM DEPTH, ice/snow: 305.025 m * MAXIMUM DEPTH, ice/snow: 1434.575 m |
long_lat |
ENVELOPE(159.183000,159.183000,-72.817000,-72.817000) |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Ross Sea Sea ice Southern Ocean |
op_source |
Supplement to: Schüpbach, Simon; Federer, Urs; Kaufmann, Patrik R; Albani, Samuel; Barbante, Carlo; Stocker, Thomas F; Fischer, Hubertus (2013): High-resolution mineral dust and sea ice proxy records from the Talos Dome ice core. Climate of the Past, 9(6), 2789-2807, https://doi.org/10.5194/cp-9-2789-2013 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.833044 https://doi.org/10.1594/PANGAEA.833044 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.83304410.5194/cp-9-2789-2013 |
_version_ |
1810489230195949568 |