Citation:

172756404781814104

Name: Chemistry record of icecore BER11C95_25
Published: 2004
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

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.

Project(s):

Glaciology @ AWI (AWI_Glac)

Coverage:

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

Event(s):

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

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, ice/snow	Depth ice/snow	m			Geocode
2	AGE	Age	ka BP			Geocode
3	Age	Age	a AD/CE	Ruth, Urs		July of year is assigned to depth, top
4	Depth, top/min	Depth top	m	Ruth, Urs
5	Depth, bottom/max	Depth bot	m	Ruth, Urs
6	Accumulation rate ice, water equivalent	Acc rate ice	kg/m²/a	Ruth, Urs	Calculated, CFA layer counting
7	δ Deuterium	δD	‰ SMOW	Oerter, Hans	Mass spectrometer VG SIRA 10
8	δ18O, water	δ18O H2O	‰ SMOW	Oerter, Hans	Mass spectrometer VG SIRA 10
9	Deuterium excess	d xs	‰	Oerter, Hans	Calculated
10	Fluoride	F-	µg/kg	Ruth, Urs	Ion chromatography
11	Methane sulfonic acid	MSA	µg/kg	Ruth, Urs	Ion chromatography
12	Chloride	Cl-	µg/kg	Ruth, Urs	Ion chromatography
13	Nitrate	[NO3]-	µg/kg	Ruth, Urs	Ion chromatography
14	Sulfate	[SO4]2-	µg/kg	Ruth, Urs	Ion chromatography
15	Sulfate, non-sea-salt	nssSO4	µg/kg	Ruth, Urs	Calculated
16	Sulfate, non-sea-salt	nssSO4	µg/kg	Ruth, Urs	Calculated	corrected
17	Particle concentration	Part conc	#/ml	Ruth, Urs	Laser particle counter, KLOTZ
18	Calcium	Ca2+	µg/kg	Ruth, Urs	Continuous Flow Analysis (CFA)
19	Ammonium	[NH4]+	µg/kg	Ruth, Urs	Continuous Flow Analysis (CFA)
20	Conductivity, electrolytic	EC	µS/cm	Ruth, Urs	Ion chromatography
21	Conductivity, electrolytic	EC	µS/cm	Ruth, Urs	Continuous Flow Analysis (CFA)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

17133 data points

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