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Ruth, Urs; Wagenbach, Dietmar; Oerter, Hans (2004): Chemistry record of icecore BER11C95_25. PANGAEA,, Supplement to: Ruth, Urs; Wagenbach, Dietmar; Mulvaney, Robert; Oerter, Hans; Graf, Wolfgang; Pulz, H; Littot, Geneviève C (2004): Comprehensive 1000 year climatic history from an intermediate depth ice core from the south dome Berkner Island, Antarctica: methodics, dating, and first results. Annals of Glaciology, 39, 146-154,

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A 181 m deep ice core drilled in 1994/95 on the south dome of Berkner Island, Antarctica, was analyzed for stable isotopes, major ions and microparticle concentrations. Samples for ion chromatography were prepared by using a novel technique of filling decontaminated sample from a device for continuous ice-core melting directly into the sample vials. The core was dated through identification of volcanic horizons and interpolative layer counting. The core, together with a similar core from the north dome, reveals a 1000 year history of relatively stable climate. Temporal variations in the two cores deviate from each other owing to changing patterns of regional-scale circulation; the best correspondence between them is found for MSA-. delta18O, accumulation rate and a sea-salt proxy show only negligible correlation, which suggests a complex meteorological setting. Increasing annual accumulation is observed for the last 100 years. A period of increased sea-salt concentrations started around AD 1405, as has also been observed in other cores. Microparticle concentrations are on average 1220 particles (>=1.0 ?m diameter)/mL; they are enhanced from AD 1200 to 1350, possibly because of a higher atmospheric mineral dust load or because local volcanic activity was stronger than previously thought. Microparticles and NH4+show marked but multiple and very irregular sub-annual peaks; long-term stacking of 1 year data intervals yields seasonal maxima in austral spring or mid-summer, respectively. Post-depositional redistribution was observed for MSA, NO3- and F- at volcanic horizons.
Glaciology @ AWI (AWI_Glac)
Latitude: -79.614160 * Longitude: -45.724330
Date/Time Start: 1995-02-08T00:00:00 * Date/Time End: 1995-02-08T00:00:00
Minimum DEPTH, ice/snow: 0.3610 m * Maximum DEPTH, ice/snow: 168.5225 m
BER11C95_25 (B25) * Latitude: -79.614160 * Longitude: -45.724330 * Date/Time: 1995-02-08T00:00:00 * Elevation Start: 886.0 m * Elevation End: 0.0 m * Recovery: 181 m * Method/Device: Ice drill (ICEDRILL) * Comment: sampling during ANT-XII/3, Elevation (WGS84) = 866.48 m
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, ice/snowDepth ice/snowmGeocode
2AGEAgeka BPGeocode
3AgeAgea AD/CERuth, UrsJuly of year is assigned to depth, top
4Depth, top/minDepth topmRuth, Urs
5Depth, bottom/maxDepth botmRuth, Urs
6Accumulation rate ice, water equivalentAcc rate icekg/m2/aRuth, UrsCalculated, CFA layer counting
7δ DeuteriumδD‰ SMOWOerter, HansMass spectrometer VG SIRA 10
8δ18O, waterδ18O H2O‰ SMOWOerter, HansMass spectrometer VG SIRA 10
9Deuterium excessd xsOerter, HansCalculated
10FluorideFµg/kgRuth, UrsIon chromatography
11Methane sulfonic acidMSAµg/kgRuth, UrsIon chromatography
12ChlorideCl-µg/kgRuth, UrsIon chromatography
13Nitrate[NO3]-µg/kgRuth, UrsIon chromatography
14Sulfate[SO4]2-µg/kgRuth, UrsIon chromatography
15Sulfate, non-sea-saltnssSO4µg/kgRuth, UrsCalculated
16Sulfate, non-sea-saltnssSO4µg/kgRuth, UrsCalculatedcorrected
17Particle concentrationPart conc#/mlRuth, UrsLaser particle counter, KLOTZ
18CalciumCa2+µg/kgRuth, UrsContinuous Flow Analysis (CFA)
19Ammonium[NH4]+µg/kgRuth, UrsContinuous Flow Analysis (CFA)
20Conductivity, electrolyticECµS/cmRuth, UrsIon chromatography
21Conductivity, electrolyticECµS/cmRuth, UrsContinuous Flow Analysis (CFA)
17133 data points

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