Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 11, issue 5
Articles | Volume 11, issue 5
https://doi.org/10.5194/esurf-11-849-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-11-849-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 11, issue 5
Research article
 | 
08 Sep 2023
Research article |  | 08 Sep 2023

Spatially coherent variability in modern orographic precipitation produces asymmetric paleo-glacier extents in flowline models: Olympic Mountains, USA

Andrew A. Margason, Alison M. Anders, Robert J. C. Conrick, and Gerard H. Roe

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Cited articles

Adams, B. A. and Ehlers, T. A.: Tectonic controls of Holocene erosion in a glaciated orogen, Earth Surf. Dynam., 6, 595–610, https://doi.org/10.5194/esurf-6-595-2018, 2018. 
Anders, A. M., Roe, G. H., Durran, D. R., and Minder, J. R.: Small-Scale Spatial Gradients in Climatological Precipitation on the Olympic Peninsula, J. Hydrometeorol., 8, 1068–1081, https://doi.org/10.1175/JHM610.1, 2007. 
Anders, A. M., Mitchell, S. G., and Tomkin, J. H.: Cirques, peaks, and precipitation patterns in the Swiss Alps: Connections among climate, glacial erosion, and topography, Geology, 38, 239–242, https://doi.org/10.1130/G30691.1, 2010. 
Baccus, W. D., A Park Interpreter's Guide to the Climate of Hurricane Ridge, Olympic National Park, Climate Summary for Water Years 2000 to 2017, Natural Resources Report NPS/NCCN/NRR 2018/1741, US Department of the Interior, Fort Collins, Colorado, http://npshistory.com/publications/olym/nrr-2018-1714.pdf (last access: 5 February 2023), 2018. 
Barnston, A. G. and Livezey, R. E.: Classification, Seasonality and Persistence of Low-Frequency Atmospheric Circulation Patterns, Mon. Weather Rev., 115, 1083–1126, https://doi.org/10.1175/1520-0493(1987)115<1083:CSAPOL>2.0.CO;2, 1987. 
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Short summary
We examine differences in glacier extent in the Olympic Mountains, USA, where modern precipitation in east-facing valleys is only 50 % of that in west-facing valleys. During the Last Glacial Period, there were very small glaciers in the east and very large glaciers in the west. We use climate data and glacier models to show that the modern spatial pattern of precipitation is likely to have been similar during the past glaciation and may be sufficient to explain the asymmetry of glacier extent.
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