TY - JOUR
T1 - Modeling dependence of moraine deposition on climate history
T2 - the effect of seasonality
AU - Vacco, David A.
AU - Alley, Richard B.
AU - Pollard, David
N1 - Funding Information:
We thank Sridhar Anandakrishnan, Meredith Kelly, and Patrick Applegate for discussions that helped improve this study. Partial support was provided by the National Science Foundation through grants 0424589, 0440899, and 0531211, and by the Gary Comer Science and Education Foundation. Thanks to reviewers Bryn Hubbard and Jaap JM van der Meer for comments that helped to improve this paper significantly.
PY - 2009/4
Y1 - 2009/4
N2 - A simple shallow-ice flowline glacier model coupled to a model of sediment transport and deposition is used to simulate formation and preservation of moraines. The number, positions, and volume of moraines formed all are sensitive to the climate history assumed. We drive the model with the GISP2 central-Greenland temperature record, and with reduced-millennial-amplitude versions of that record, to test the hypothesis that the Younger Dryas and other millennial oscillations were primarily wintertime events and thus had less influence on glacier behavior than did the Last Glacial Maximum with its strong summertime as well as wintertime signal. We find that forcing the model by GISP2, with dampened strength of the millennial-scale signal, provides modeled moraine configurations that reflect observed moraine records in the Northern Hemisphere.
AB - A simple shallow-ice flowline glacier model coupled to a model of sediment transport and deposition is used to simulate formation and preservation of moraines. The number, positions, and volume of moraines formed all are sensitive to the climate history assumed. We drive the model with the GISP2 central-Greenland temperature record, and with reduced-millennial-amplitude versions of that record, to test the hypothesis that the Younger Dryas and other millennial oscillations were primarily wintertime events and thus had less influence on glacier behavior than did the Last Glacial Maximum with its strong summertime as well as wintertime signal. We find that forcing the model by GISP2, with dampened strength of the millennial-scale signal, provides modeled moraine configurations that reflect observed moraine records in the Northern Hemisphere.
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U2 - 10.1016/j.quascirev.2008.04.018
DO - 10.1016/j.quascirev.2008.04.018
M3 - Article
AN - SCOPUS:61649099274
SN - 0277-3791
VL - 28
SP - 639
EP - 646
JO - Quaternary Science Reviews
JF - Quaternary Science Reviews
IS - 7-8
ER -