Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica
The ammonium, calcium, and sodium concentrations from three intermediate depth ice cores drilled in the area of Dronning Maud Land, East Antarctica, have been investigated. Since all measurements were performed by a high-resolution Continuous Flow Analysis system, for the first time seasonal signals...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728291 2023-05-15T13:42:09+02:00 Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica Sommer, Stefan Wagenbach, Dietmar Mulvaney, Robert Fischer, Hubertus MEDIAN LATITUDE: -75.119179 * MEDIAN LONGITUDE: 0.867798 * SOUTH-BOUND LATITUDE: -75.581500 * WEST-BOUND LONGITUDE: -6.000000 * NORTH-BOUND LATITUDE: -74.499167 * EAST-BOUND LONGITUDE: 6.498500 * DATE/TIME START: 1997-12-17T00:00:00 * DATE/TIME END: 1998-01-14T00:00:00 2000-10-02 application/zip, 14 datasets https://doi.pangaea.de/10.1594/PANGAEA.728291 https://doi.org/10.1594/PANGAEA.728291 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728291 https://doi.org/10.1594/PANGAEA.728291 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Sommer, Stefan; Wagenbach, Dietmar; Mulvaney, Robert; Fischer, Hubertus (2000): Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica 2. Seasonally resolved chemical records. Journal of Geophysical Research: Atmospheres, 105(D24), 29423-29434, https://doi.org/10.1029/2000JD900450 B31 B32 B33 DML03C98_09 DML05C98_32 DML07C98_31 DML15C98_14 DML17C98_33 DML18C98_04 Dronning Maud Land Antarctica EPICA EPICA_DML3 European Project for Ice Coring in Antarctica FB9804 FB9809 FB9814 ICEDRILL Ice drill Neumayer Station (WMO89002) Dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.728291 https://doi.org/10.1029/2000JD900450 2023-01-20T07:31:33Z The ammonium, calcium, and sodium concentrations from three intermediate depth ice cores drilled in the area of Dronning Maud Land, East Antarctica, have been investigated. Since all measurements were performed by a high-resolution Continuous Flow Analysis system, for the first time seasonal signals of chemical trace species could be obtained from the interior of central Antarctica over a period of approximately 2 millennia. Although the elevation as well as the accumulation rate differ between the drilling sites, similar values were obtained by comparing mean concentrations spanning the last 900 years. However, a distinct lack of intersite correlation was found on decadal timescales. Despite a noticeable accumulation change, apparent in one core, no significant concentration change of all three species has occurred. All the measured ions show clear seasonal signals over the whole records. While the sea-salt-related component sodium peaks simultaneously with calcium, the maximum ammonium concentration occurs in the snow with a time lag of 2 months after the sea-salt peak. More than 60% of the calcium concentration can be attributed to an ocean source. Elevated sodium concentrations were found within this millennium compared to mean values of the whole records, but the spatially varying shape of the increase suggests that a possible climatic signal is biased by local deposition effects. Dataset Antarc* Antarctica Dronning Maud Land East Antarctica EPICA PANGAEA - Data Publisher for Earth & Environmental Science East Antarctica Dronning Maud Land Neumayer Neumayer Station ENVELOPE(-6.000000,6.498500,-74.499167,-75.581500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
B31 B32 B33 DML03C98_09 DML05C98_32 DML07C98_31 DML15C98_14 DML17C98_33 DML18C98_04 Dronning Maud Land Antarctica EPICA EPICA_DML3 European Project for Ice Coring in Antarctica FB9804 FB9809 FB9814 ICEDRILL Ice drill Neumayer Station (WMO89002) |
spellingShingle |
B31 B32 B33 DML03C98_09 DML05C98_32 DML07C98_31 DML15C98_14 DML17C98_33 DML18C98_04 Dronning Maud Land Antarctica EPICA EPICA_DML3 European Project for Ice Coring in Antarctica FB9804 FB9809 FB9814 ICEDRILL Ice drill Neumayer Station (WMO89002) Sommer, Stefan Wagenbach, Dietmar Mulvaney, Robert Fischer, Hubertus Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica |
topic_facet |
B31 B32 B33 DML03C98_09 DML05C98_32 DML07C98_31 DML15C98_14 DML17C98_33 DML18C98_04 Dronning Maud Land Antarctica EPICA EPICA_DML3 European Project for Ice Coring in Antarctica FB9804 FB9809 FB9814 ICEDRILL Ice drill Neumayer Station (WMO89002) |
description |
The ammonium, calcium, and sodium concentrations from three intermediate depth ice cores drilled in the area of Dronning Maud Land, East Antarctica, have been investigated. Since all measurements were performed by a high-resolution Continuous Flow Analysis system, for the first time seasonal signals of chemical trace species could be obtained from the interior of central Antarctica over a period of approximately 2 millennia. Although the elevation as well as the accumulation rate differ between the drilling sites, similar values were obtained by comparing mean concentrations spanning the last 900 years. However, a distinct lack of intersite correlation was found on decadal timescales. Despite a noticeable accumulation change, apparent in one core, no significant concentration change of all three species has occurred. All the measured ions show clear seasonal signals over the whole records. While the sea-salt-related component sodium peaks simultaneously with calcium, the maximum ammonium concentration occurs in the snow with a time lag of 2 months after the sea-salt peak. More than 60% of the calcium concentration can be attributed to an ocean source. Elevated sodium concentrations were found within this millennium compared to mean values of the whole records, but the spatially varying shape of the increase suggests that a possible climatic signal is biased by local deposition effects. |
format |
Dataset |
author |
Sommer, Stefan Wagenbach, Dietmar Mulvaney, Robert Fischer, Hubertus |
author_facet |
Sommer, Stefan Wagenbach, Dietmar Mulvaney, Robert Fischer, Hubertus |
author_sort |
Sommer, Stefan |
title |
Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica |
title_short |
Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica |
title_full |
Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica |
title_fullStr |
Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica |
title_full_unstemmed |
Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica |
title_sort |
seasonally resolved chemical records of six ice cores from the dronning maud land, antarctica |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728291 https://doi.org/10.1594/PANGAEA.728291 |
op_coverage |
MEDIAN LATITUDE: -75.119179 * MEDIAN LONGITUDE: 0.867798 * SOUTH-BOUND LATITUDE: -75.581500 * WEST-BOUND LONGITUDE: -6.000000 * NORTH-BOUND LATITUDE: -74.499167 * EAST-BOUND LONGITUDE: 6.498500 * DATE/TIME START: 1997-12-17T00:00:00 * DATE/TIME END: 1998-01-14T00:00:00 |
long_lat |
ENVELOPE(-6.000000,6.498500,-74.499167,-75.581500) |
geographic |
East Antarctica Dronning Maud Land Neumayer Neumayer Station |
geographic_facet |
East Antarctica Dronning Maud Land Neumayer Neumayer Station |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica EPICA |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica EPICA |
op_source |
Supplement to: Sommer, Stefan; Wagenbach, Dietmar; Mulvaney, Robert; Fischer, Hubertus (2000): Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica 2. Seasonally resolved chemical records. Journal of Geophysical Research: Atmospheres, 105(D24), 29423-29434, https://doi.org/10.1029/2000JD900450 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728291 https://doi.org/10.1594/PANGAEA.728291 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.728291 https://doi.org/10.1029/2000JD900450 |
_version_ |
1766163583536726016 |