Accumulation variability drived from an ice core from coastal Dronning Maud Land, Antarctica 

Annals of Glaciology, Vol 39, p. 339-345, 2004 

M. Kaczmarska, E. Isaksson, L. Karlöf, J.-G. Winther and J. Kohler
Norwegian Polar Institute, Polar Environmental Centre, N-9296 Tromsø, Norway
F. Godtliebsen and L. Ringstad Olsen
Faculty of Science, University of Tromsø, N-9037 Tromsø, Norway
C.M. Hofstede, M.R. van den Broeke and R.S.W. van de Wal
Institute for Marine and Atmospheric Research, P.O. Box 80.005, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
N. Gundestrup
Deceased - Ice and Climate, The Niels Bohr Institute, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark

ABSTRACT.
A 100 m long ice core was retrieved from the coastal area of Dronning Maud Land (DML), Antarctica, in the 2000/01 austral summer. The core was dated to AD 1737 by identification of volcanic horizons in dielectrical profiling and electrical conductivity measurement records in combination with seasonal layer counting from high-resolution oxygen isotope (δ¹⁸O) data. A mean long-term accumulation rate of 0.29 m a^-1w.e. was derived from the high-resolution δ¹⁸O record as well as accumulation rates during periods in between the identified volcanic horizons. A statistically significant decrease in accumulation was found from about 1920 to the present. A comparison with other coastal ice cores from DML suggests that this is a regional pattern.