HR: 11:35h
AN: PP22B-06 [Abstracts]
TI: Retrieving a Common Accumulation Record From Greenland Ice Cores for the Past 1800 Years
AU: Andersen, K K
EM: kka@gfy.ku.dk
AF: Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen,
2100
Denmark
AU: * Ditlevsen, P D
EM: pditlev@gfy.ku.dk
AF: Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen,
2100
Denmark
AU: Rasmussen, S O
EM: olander@gfy.ku.dk
AF: Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen,
2100
Denmark
AU: Clausen, H B
EM: hbc@gfy.ku.dk
AF: Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen,
2100
Denmark
AU: Johnsen, S J
EM: sigfus@gfy.ku.dk
AF: Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen,
2100
Denmark
AB:
In the accumulation zone of the Greenland ice sheet the annual
accumulation rate may be identified through identification of the annual cycle in the isotopic climate signal and other
seasonally varying parameters. On an annual basis the accumulation rate in different Greenland ice cores is highly variable,
and the degree of correlation between the accumulation series from different ice cores is low. When using multiyear averages
of the different accumulation records the correlation however increases significantly. A statistical model has been developed
estimating the common climate signal in the different records through optimization of the signal to noise variance ratio.
A common Greenland accumulation record with five years resolution for the past 1800 years has been extracted. The record
establishes a climatic record which points to a possible cause for the disappearance of the Norse settlements in Greenland.
DE: 0724 Ice cores (4932)
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 3349 Polar meteorology
DE: 3354 Precipitation (1854)
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005