TY  - JOUR
A1  - Strunk, Astrid
A1  - Knudsen, Mads Faurschou
A1  - Egholm, David L.
A1  - Jansen, John D.
A1  - Levy, Laura B.
A1  - Jacobsen, Bo H.
A1  - Larsen, Nicolaj K.
T1  - One million years of glaciation and denudation history in west Greenland
JF  - Nature Communications
N2  - The influence of major Quaternary climatic changes on growth and decay of the Greenland Ice Sheet, and associated erosional impact on the landscapes, is virtually unknown beyond the last deglaciation. Here we quantify exposure and denudation histories in west Greenland by applying a novel Markov-Chain Monte Carlo modelling approach to all available paired cosmogenic Be-10-Al-26 bedrock data from Greenland. We find that long-term denudation rates in west Greenland range from >50 m Myr(-1) in low-lying areas to similar to 2 m Myr(-1) at high elevations, hereby quantifying systematic variations in denudation rate among different glacial landforms caused by variations in ice thickness across the landscape. We furthermore show that the present day ice-free areas only were ice covered ca. 45% of the past 1 million years, and even less at high-elevation sites, implying that the Greenland Ice Sheet for much of the time was of similar size or even smaller than today.
Y1  - 2017
U6  - https://doi.org/10.1038/ncomms14199
SN  - 2041-1723
VL  - 8
PB  - Nature Publishing Group UK
CY  - London
ER  -