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Sommer, Stefan; Wagenbach, Dietmar; Mulvaney, Robert; Fischer, Hubertus (2000): Seasonally resolved chemical records of six ice cores from the Dronning Maud Land, Antarctica. PANGAEA, https://doi.org/10.1594/PANGAEA.728291, Supplement to: Sommer, S et al. (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

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Abstract:
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.
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
Event(s):
DML03C98_09 (FB9809) * Latitude: -74.499167 * Longitude: 1.960833 * Date/Time: 1998-01-02T00:00:00 * Elevation Start: 2843.0 m * Elevation End: 2855.0 m * Recovery: 41.5 m * Location: Dronning Maud Land, Antarctica * Campaign: EPICA_DML3 * Basis: Neumayer Station (WMO89002) * Method/Device: Ice drill (ICEDRILL) * Comment: DML03
DML05C98_32 (B32) * Latitude: -75.002333 * Longitude: 0.007000 * Date/Time: 1997-12-25T00:00:00 * Elevation Start: 2882.0 m * Elevation End: 2892.0 m * Recovery: 149.9 m * Location: Dronning Maud Land, Antarctica * Campaign: EPICA_DML3 * Basis: Neumayer Station (WMO89002) * Method/Device: Ice drill (ICEDRILL) * Comment: DML05
DML07C98_31 (B31) * Latitude: -75.581500 * Longitude: -3.430333 * Date/Time: 1997-12-19T00:00:00 * Elevation Start: 2669.0 m * Elevation End: 2680.0 m * Recovery: 115.1 m * Location: Dronning Maud Land, Antarctica * Campaign: EPICA_DML3 * Basis: Neumayer Station (WMO89002) * Method/Device: Ice drill (ICEDRILL) * Comment: DML07
Comment:
see doi:10.1594/PANGAEA.728290 for age models
Size:
14 datasets

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Datasets listed in this publication series

  1. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML03C98_09. https://doi.org/10.1594/PANGAEA.58554
  2. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML05C98_32 (B32). https://doi.org/10.1594/PANGAEA.58689
  3. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML05C98_32 (B32). https://doi.org/10.1594/PANGAEA.58475
  4. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML07C98_31 (B31). https://doi.org/10.1594/PANGAEA.58695
  5. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML07C98_31 (B31). https://doi.org/10.1594/PANGAEA.58819
  6. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML15C98_14. https://doi.org/10.1594/PANGAEA.58555
  7. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML17C98_33 (B33). https://doi.org/10.1594/PANGAEA.58690
  8. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus age in firn core DML17C98_33 (B33). https://doi.org/10.1594/PANGAEA.58476
  9. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus depth in firn core DML03C98_09. https://doi.org/10.1594/PANGAEA.58552
  10. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus depth in firn core DML05C98_32 (B32). https://doi.org/10.1594/PANGAEA.58498
  11. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus depth in firn core DML07C98_31 (B31). https://doi.org/10.1594/PANGAEA.58594
  12. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus depth in firn core DML15C98_14. https://doi.org/10.1594/PANGAEA.58553
  13. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus depth in firn core DML17C98_33 (B33). https://doi.org/10.1594/PANGAEA.58499
  14. Sommer, S; Wagenbach, D; Mulvaney, R et al. (2000): Chemistry versus depth in firn core DML18C98_04. https://doi.org/10.1594/PANGAEA.58820