A 1500 year record of accumulation at Amundsenisen western Dronning Maud Land, Antarctica, derived from electrical and radioactive measurements on a 120 m ice core

Karlöf, Lars; Winther, Jan‐Gunnar; Isaksson, Elisabeth; Kohler, Jack; Pinglot, J. F.; Wilhelms, Frank; Hansson, Margareta; Holmlund, Per; Nyman, M.; Pettersson, Rickard; Stenberg, Malin; Thomassen, M.; Veen, Carina van der; Wal, R. S. W. van de

doi:10.1029/1999jd901119

Cited by 54 publications

(77 citation statements)

References 61 publications

(4 reference statements)

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“…We used Simkin and Siebert's (1994) chronology of eruptions to assign volcanic events that have been dated but not yet identified.This chronology uses theVEI as a measure for the strength of the eruption on a logarithmic scale.We made the identification purely on the strength of the eruption and the latitude of the geographic location of the volcano (Delmas and others,1985;Karlo« f and others, 2000). No geochemical analyses were carried out on these volcanic horizons, and our results should be interpreted with care as the VEI is not a measure of the strength of a DEP peak, which is often dominated by the sulphate load.…”

Section: Appendix Identification Of Volcanic Horizonsmentioning

confidence: 99%

“…Here, we describe the field conditions only for the M150 and BAS cores, as the field conditions for the other four cores have already been published (Karlo« f and others, 2000;Oerter and others, 2000;Sommer and others, 2000a, b;Traufetter and others, in press). Both cores were drilled with a conventional electromechanical ice-core drill (e.g.…”

Section: Field Conditionsmentioning

confidence: 99%

“…The CV firn core was dated assuming a (within 15%) constant annual accumulation rate (Karlo« f and others, 2000). An unidentified volcanic horizon in the firn core could then be expected to be within a certain age interval, and a candidate volcano was identified using the chronology of eruptions by Simkin and Siebert (1994).…”

Section: Dating Firn Coresmentioning

confidence: 99%

“…In 1997/98, cores B31^B33 were retrieved from DML by the Alfred-Wegener-Institut fu« r Polar-und Meeresforschung (AWI), Bremerhaven (Oerter and others, 2000;Sommer and others, 2000a, b;Traufetter and others, in press). In 1998, cores CV and BAS were retrieved at Camp Victoria (Karlo« f and others, 2000) and the fuel depot of the British Antarctic Survey (BAS) respectively. During the Norwegian Antarctic Research Expedition (NARE) 2000/01, a medium-length firn core, M150, was drilled at site M on the DML plateau (Winther and others, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Firn accumulation records for the past 1000 years on the basis of dielectric profiling of six cores from Dronning Maud Land, Antarctica

Hofstede¹,

Roderik²,

Kaspers³

et al. 2004

J. Glaciol.

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ABSTRACT. This paper presents an overview of firn accumulation in DronningMaud Land (DML), Antarctica, over the past 1000 years. It is based on a chronology established with dated volcanogenic horizons detected by dielectric profiling of six mediumlength firn cores. In 1998 the British Antarctic Survey retrieved a medium-length firn core from western DML. During the Nordic EPICA (European Project for Ice Coring in Antarctica) traverse of 2000/01, a 160 m long firn core was drilled in easternDML. Together with previously published data from four other medium-length ice cores from the area, these cores yield 50 possible volcanogenic horizons. All six firn cores cover a mutual time record until the 29th eruption. This overlapping period represents a period of approximately 1000 years, with mean values ranging between 43 and 71 mm w.e. The cores revealed no significant trend in snow accumulation. Running averages over 50 years, averaged over the six cores, indicate temporal variations of 5%. All cores display evidence of a minimum in the mean annual firn accumulation rate around AD1500 and maxima around AD1400 and 1800.The mean increase over the early 20th century was the strongest increase, but the absolute accumulation rate was not much higher than around AD1400. In eastern DML a 13% increase is observed for the second half of the 20th century.

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Section: Appendix Identification Of Volcanic Horizonsmentioning

confidence: 99%

Section: Field Conditionsmentioning

confidence: 99%

Section: Dating Firn Coresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Firn accumulation records for the past 1000 years on the basis of dielectric profiling of six cores from Dronning Maud Land, Antarctica

Hofstede¹,

Roderik²,

Kaspers³

et al. 2004

J. Glaciol.

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“…The authors believed that such 850 E. Y. Osipov et al: High-resolution 900 year volcanic and climatic record spatial differences result from minor shifts in preferred locations for large-scale circulation features. Decreased snow accumulation has been revealed in the ice core from Dronning Maud Land for the period from 1452 to 1641 (Karlöf et al, 2000). Sharply lower accumulation rates at the period AD 1460-1800 were determined at the DT263 site, East Antarctica, by Liya et al (2006).…”

Section: Snow Accumulation Ratesmentioning

confidence: 99%

High-resolution 900 year volcanic and climatic record from the Vostok area, East Antarctica

et al. 2014

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Abstract. Ion chromatography measurements of 1730 snow and firn samples obtained from three short cores and one pit in the Vostok station area, East Antarctica, allowed for the production of the combined volcanic record of the last 900 years (AD 1093(AD -2010. The resolution of the record is 2-3 samples per accumulation year. In total, 24 volcanic events have been identified, including seven well-known low-latitude eruptions

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Reassessment of the Antarctic Surface Mass Balance Using Calibrated Output of a Regional Atmospheric Climate Model

Berg

Broeke

Reijmer

et al. 2009

Collected Reprint Series

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A detailed comparison of model-simulated and observed Antarctic surface mass balance (SMB) is presented, using output of a regional atmospheric climate model (RACMO2/ANT) for the period 1980 to 2004. All available SMB observations from Antarctica (N = 1900) are used for the comparison, except clearly erroneous observations and data which are in areas where dominant SMB patterns occur on scales smaller than the model resolution. A high correlation is found (r = 0.82), while the regression slope (1.2) indicates that the model slightly overemphasizes SMB gradients. Comparing the model SMB with the latest SMB compilation, a similarly high correlation is found (r = 0.79), but the regression slope is much too steep because model-simulated SMB agrees less with the compilation in data-sparse regions. Model-simulated SMB resembles the observed SMB as a function of elevation very well. This is used to calibrate model-simulated SMB to reassess the contemporary Antarctic SMB. Compared to the latest SMB compilation, calibrated model-simulated SMB is up to 1 m yr À1 higher in the coastal zones of East and West Antarctica, which are without exception in areas with few observations. As a result, the SMB integrated over the grounded ice sheet (171 ± 3 mm yr À1 ) exceeds previous estimates by as much as 15%. Support or falsification of this model result can only be found in new SMB observations from high accumulation regions.

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A 1500 year record of accumulation at Amundsenisen western Dronning Maud Land, Antarctica, derived from electrical and radioactive measurements on a 120 m ice core

Cited by 54 publications

References 61 publications

Firn accumulation records for the past 1000 years on the basis of dielectric profiling of six cores from Dronning Maud Land, Antarctica

Firn accumulation records for the past 1000 years on the basis of dielectric profiling of six cores from Dronning Maud Land, Antarctica

High-resolution 900 year volcanic and climatic record from the Vostok area, East Antarctica

Reassessment of the Antarctic Surface Mass Balance Using Calibrated Output of a Regional Atmospheric Climate Model

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