In this section
@article{Young:2011:10.1130/G31399.1,
author = {Young, NE and Briner, JP and Stewart, HAM and Axford, Y and Csatho, B and Rood, DH and Finkel, RC},
doi = {10.1130/G31399.1},
journal = {Geology},
pages = {131--134},
title = {Response of Jakobshavn Isbræ, Greenland, to Holocene climate change},
url = {http://dx.doi.org/10.1130/G31399.1},
volume = {39},
year = {2011}
}
TY - JOUR
AB - Rapid fluctuations in the velocity of Greenland Ice Sheet (GIS) outlet glaciers over the past decade have made it difficult to extrapolate ice-sheet change into the future. This significant short-term variability highlights the need for geologic records of preinstrumental GIS margin fluctuations in order to better predict future GIS response to climate change. Using <sup>10</sup>Be surface exposure ages and radiocarbon-dated lake sediments, we constructed a detailed chronology of ice-margin fluctuations over the past 10 k.y. for Jakobshavn Isbræ, Greenland's largest outlet glacier. In addition, we present new estimates of corresponding local temperature changes using a continuous record of insect (Chironomidae) remains preserved in lake sediments. We find that following an early Holocene advance just prior to 8 ka, Jakobshavn Isbræ retreated rapidly at a rate of ~100 m yr<sup>-1</sup>, likely in response to increasing regional and local temperatures. Ice remained behind its present margin for ~7 k.y. during a warm period in the middle Holocene with sustained temperatures ~2 °C warmer than today, then the land-based margin advanced at least 2-4 km between A.D. 1500-1640 and A.D. 1850. The ice margin near Jakobshavn thus underwent large and rapid adjustments in response to relatively modest centennial-scale Holocene temperature changes, which may foreshadow GIS response to future warming. © 2011 Geological Society of America.
AU - Young,NE
AU - Briner,JP
AU - Stewart,HAM
AU - Axford,Y
AU - Csatho,B
AU - Rood,DH
AU - Finkel,RC
DO - 10.1130/G31399.1
EP - 134
PY - 2011///
SN - 0091-7613
SP - 131
TI - Response of Jakobshavn Isbræ, Greenland, to Holocene climate change
T2 - Geology
UR - http://dx.doi.org/10.1130/G31399.1
VL - 39
ER -