Articles | Volume 13, issue 9
https://doi.org/10.5194/gmd-13-4555-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-13-4555-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Development and technical paper
| 
25 Sep 2020
Development and technical paper |
| 25 Sep 2020
| 25 Sep 2020
Simulating the Early Holocene demise of the Laurentide Ice Sheet with BISICLES (public trunk revision 3298)
School of Earth and Environment, Faculty of Environment, University of Leeds, Leeds, UK
Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
Lauren J. Gregoire
School of Earth and Environment, Faculty of Environment, University of Leeds, Leeds, UK
Ruza F. Ivanovic
School of Earth and Environment, Faculty of Environment, University of Leeds, Leeds, UK
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The Laurentide Ice Sheet was the largest ice sheet to grow and disappear in the Northern Hemisphere during the last glaciation. In northwestern Canada, it covered the Mackenzie Valley, blocking the migration of fauna and early humans between North America and Beringia and altering the drainage systems. We reconstruct the timing of ice sheet retreat in this region and the implications for the migration of early humans into North America, the drainage of glacial lakes, and past sea level rise.
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The neodymium (Nd) isotope (εNd) scheme in the ocean model of FAMOUS is used to explore a benthic Nd flux to seawater. Our results demonstrate that sluggish modern Pacific waters are sensitive to benthic flux alterations, whereas the well-ventilated North Atlantic displays a much weaker response. In closing, there are distinct regional differences in how seawater acquires its εNd signal, in part relating to the complex interactions of Nd addition and water advection.
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The Last Glacial Maximum (LGM; ~21 000 years ago) is a major focus for evaluating how well climate models simulate climate changes as large as those expected in the future. Here, we compare the latest climate model (CMIP6-PMIP4) to the previous one (CMIP5-PMIP3) and to reconstructions. Large-scale climate features (e.g. land–sea contrast, polar amplification) are well captured by all models, while regional changes (e.g. winter extratropical cooling, precipitations) are still poorly represented.
Julienne Stroeve, Vishnu Nandan, Rosemary Willatt, Rasmus Tonboe, Stefan Hendricks, Robert Ricker, James Mead, Robbie Mallett, Marcus Huntemann, Polona Itkin, Martin Schneebeli, Daniela Krampe, Gunnar Spreen, Jeremy Wilkinson, Ilkka Matero, Mario Hoppmann, and Michel Tsamados
The Cryosphere, 14, 4405–4426, https://doi.org/10.5194/tc-14-4405-2020, https://doi.org/10.5194/tc-14-4405-2020, 2020
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This study provides a first look at the data collected by a new dual-frequency Ka- and Ku-band in situ radar over winter sea ice in the Arctic Ocean. The instrument shows potential for using both bands to retrieve snow depth over sea ice, as well as sensitivity of the measurements to changing snow and atmospheric conditions.
Andy R. Emery, David M. Hodgson, Natasha L. M. Barlow, Jonathan L. Carrivick, Carol J. Cotterill, Janet C. Richardson, Ruza F. Ivanovic, and Claire L. Mellett
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During the last ice age, sea level was lower, and the North Sea was land. The margin of a large ice sheet was at Dogger Bank in the North Sea. This ice sheet formed large rivers. After the ice sheet retreated down from the high point of Dogger Bank, the rivers had no water supply and dried out. Increased precipitation during the 15 000 years of land exposure at Dogger Bank formed a new drainage network. This study shows how glaciation and climate changes can control how drainage networks evolve.
Cited articles
Abe-Ouchi, A., Segawa, T., and Saito, F.: Climatic Conditions for modelling the Northern Hemisphere ice sheets throughout the ice age cycle, Clim. Past, 3, 423–438, https://doi.org/10.5194/cp-3-423-2007, 2007. a
Amante, C. and Eakins, B. W.: ETOPO1 1 arc-minute Global Relief Model:
Procedures, Data Sources and Analysis, NOAA Technical Memorandum NESDIS,
NGDC-24, 2009. a
Ayache, M., Swingedouw, D., Mary, Y., Eynaud, F., and Colin, C.:
Multi-centennial variability of the AMOC over the Holocene: A new
reconstruction based on multiple proxy-derived SST records, Global
Planet. Change, 170, 172–189, https://doi.org/10.1016/j.gloplacha.2018.08.016, 2018. a
Bassis, J. N., Petersen, S. V., and Mac Cathles, L.: Heinrich events triggered
by ocean forcing and modulated by isostatic adjustment, Nature, 542, 332–334,
2017. a
Bauer, E. and Ganopolski, A.: Comparison of surface mass balance of ice sheets simulated by positive-degree-day method and energy balance approach, Clim. Past, 13, 819–832, https://doi.org/10.5194/cp-13-819-2017, 2017. a, b, c, d
Benn, D. I., Hulton, N. R., and Mottram, R. H.: Calving laws, sliding laws and
the stability of tidewater glaciers, Annal. Glaciol., 46, 123–130,
2007a. a
Benn, D. I., Warren, C. R., and Mottram, R. H.: Calving processes and the
dynamics of calving glaciers, Earth-Sci. Rev., 82, 143–179,
2007b. a
Blackwell, D. D. and Steele, J. L.: Geothermal Map of North America, Geological Society of America, 1992. a
Bonacina, L., Poulter, R., Ashmore, S., and Manley, G.: Orographic rainfall and
its place in the hydrology of the globe, Q. J. Roy.
Meteor. Soc., 71, 41–55, 1945. a
Braconnot, P., Otto-Bliesner, B., Harrison, S., Joussaume, S., Peterchmitt, J.-Y., Abe-Ouchi, A., Crucifix, M., Driesschaert, E., Fichefet, Th., Hewitt, C. D., Kageyama, M., Kitoh, A., Laîné, A., Loutre, M.-F., Marti, O., Merkel, U., Ramstein, G., Valdes, P., Weber, S. L., Yu, Y., and Zhao, Y.: Results of PMIP2 coupled simulations of the Mid-Holocene and Last Glacial Maximum – Part 1: experiments and large-scale features, Clim. Past, 3, 261–277, https://doi.org/10.5194/cp-3-261-2007, 2007. a
Briggs, R. D. and Tarasov, L.: How to evaluate model-derived deglaciation
chronologies: a case study using Antarctica, Quatern. Sci. Rev., 63,
109–127, 2013. a
Carlson, A., Anslow, F., Obbink, E., LeGrande, A., Ullman, D., and Licciardi,
J.: Surface-melt driven Laurentide Ice Sheet retreat during the early
Holocene, Geophys. Res. Lett., 36, L24502, https://doi.org/10.1029/2009GL040948, 2009. a, b, c
Charbit, S., Dumas, C., Kageyama, M., Roche, D. M., and Ritz, C.: Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle, The Cryosphere, 7, 681–698, https://doi.org/10.5194/tc-7-681-2013, 2013. a, b, c
Clarke, G. K.: Subglacial processes, Ann. Rev. Earth Planet. Sci., 33,
247–276, 2005. a
Clarke, G. K. C., Leverington, D. W., Teller, J. T., and Dyke, A. S.:
Paleohydraulics of the last outburst flood from glacial Lake Agassiz and
the 8200 BP cold event, Quatern. Sci. Rev., 23, 389–407,
https://doi.org/10.1016/j.quascirev.2003.06.004,
2004. a
Cornford, S. L., Martin, D. F., Payne, A. J., Ng, E. G., Le Brocq, A. M., Gladstone, R. M., Edwards, T. L., Shannon, S. R., Agosta, C., van den Broeke, M. R., Hellmer, H. H., Krinner, G., Ligtenberg, S. R. M., Timmermann, R., and Vaughan, D. G.: Century-scale simulations of the response of the West Antarctic Ice Sheet to a warming climate, The Cryosphere, 9, 1579–1600, https://doi.org/10.5194/tc-9-1579-2015, 2015. a, b, c, d, e, f
Dupont, T. and Alley, R.: Assessment of the importance of ice-shelf buttressing
to ice-sheet flow, Geophys. Res. Lett., 32, L04503, https://doi.org/10.1029/2004GL022024, 2005. a
Durand, G., Gagliardini, O., Zwinger, T., Le Meur, E., and Hindmarsh, R. C.:
Full Stokes modeling of marine ice sheets: influence of the grid size, Ann. Glaciol., 50, 109–114, 2009. a
Favier, L., Durand, G., Cornford, S. L., Gudmundsson, G. H., Gagliardini, O.,
Gillet-Chaulet, F., Zwinger, T., Payne, A. J., and Le Brocq, A. M.: Retreat
of Pine Island Glacier controlled by marine ice-sheet instability,
Nat. Clim. Change, 4, 117–121, https://doi.org/10.1038/nclimate2094, 2014. a, b, c, d
Gandy, N., Gregoire, L. J., Ely, J. C., Clark, C. D., Hodgson, D. M., Lee, V., Bradwell, T., and Ivanovic, R. F.: Marine ice sheet instability and ice shelf buttressing of the Minch Ice Stream, northwest Scotland, The Cryosphere, 12, 3635––3651, https://doi.org/10.5194/tc-12-3635-2018, 2018. a, b
Gandy, N., Gregoire, L. J., Ely, J. C., Cornford, S. L., Clark, C. D., and
Hodgson, D. M.: Exploring the ingredients required to successfully model the
placement, generation, and evolution of ice streams in the British-Irish Ice
Sheet, Quatern. Sci. Rev., 223, 105915, https://doi.org/10.1016/j.quascirev.2019.105915, 2019. a, b, c
Gladstone, R., Schäfer, M., Zwinger, T., Gong, Y., Strozzi, T., Mottram, R., Boberg, F., and Moore, J. C.: Importance of basal processes in simulations of a surging Svalbard outlet glacier, The Cryosphere, 8, 1393–1405, https://doi.org/10.5194/tc-8-1393-2014, 2014. a, b
Goelzer, H., Robinson, A., Seroussi, H., and Van De Wal, R. S.: Recent Progress
in Greenland Ice Sheet Modelling, Curr. Clim. Change Rep., 3,
291–302, 2017. a
Gregoire, L. J., Valdes, P. J., and Payne, A. J.: The relative contribution of
orbital forcing and greenhouse gases to the North American deglaciation,
Geophys. Res. Lett., 42, 9970–9979, 2015. a
Gregoire, L. J., Otto-Bliesner, B., Valdes, P. J., and Ivanovic, R.: Abrupt
Bølling warming and ice saddle collapse contributions to the Meltwater
Pulse 1a rapid sea level rise, Geophys. Res. Lett., 43, 9130–9137,
2016. a
Gregoire, L. J., Ivanovic, R. F., Maycock, A. C., Valdes, P. J., and Stevenson, S.: Holocene lowering of the Laurentide ice sheet affects North Atlantic gyre circulation and climate, Clim. Dynam., 51, 3797–3813, 2018. a
Hooke, R.: Flow law for polycrystalline ice in glaciers: Comparison of
theoretical predictions, laboratory data, and field measurements, Rev.
Geophys., 19, 664–672, https://doi.org/10.1029/RG019i004p00664,
1981. a
Ivanovic, R. F., Gregoire, L. J., Kageyama, M., Roche, D. M., Valdes, P. J., Burke, A., Drummond, R., Peltier, W. R., and Tarasov, L.: Transient climate simulations of the deglaciation 21–9 thousand years before present (version 1) – PMIP4 Core experiment design and boundary conditions, Geosci. Model Dev., 9, 2563–2587, https://doi.org/10.5194/gmd-9-2563-2016, 2016. a, b
Iverson, N. R.: Shear resistance and continuity of subglacial till: hydrology
rules, J. Glaciol., 56, 1104–1114, 2010. a
Kaufman, D. S., Ager, T. A., Anderson, N. J., Anderson, P. M., Andrews, J. T., Bartlein, P. J., Brubaker, L. B., Coats, L. L., Cwynar, L. C., Duvall, M. L., Dyke, A. S., Edwards, M. E., Eisner, W. R., Gajewski, K., Geirsdóttir, A., Hu, F. S., Jennings, A. E., Kaplan, M. R., Kerwin, M. W., Lozhkin, A. V., MacDonald, G. M., Miller, G. H., Mock, C. J., Oswald, W. W., Otto-Bliesner, B. L., Porinchu, D. F., Rühland, K., Smol, J. P., Steig, E. J., and Wolfe, B. B.: Holocene thermal maximum in the western Arctic (0–180 W),
Quatern. Sci. Rev., 23, 529–560, 2004. a
Lambeck, K., Rouby, H., Purcell, A., Sun, Y., and Sambridge, M.: Sea level and global ice volumes from the Last Glacial Maximum to the Holocene, P. Natl. Acad. Sci. USA, 111, 15296–15303, https://doi.org/10.1073/pnas.1411762111, 2014. a
Leverington, D. W., Mann, J. D., and Teller, J. T.: Changes in the Bathymetry
and Volume of Glacial Lake Agassiz between 9200 and 7700 14C yr
B.P., Quatern. Res., 57, 244–252, https://doi.org/10.1006/qres.2001.2311,
2002. a
Liu, Z., Otto-Bliesner, B. L., He, F., Brady, E. C., Tomas, R., Clark, P. U.,
Carlson, A. E., Lynch-Stieglitz, J., Curry, W., Brook, E., Erickson, D.,
Jacob, R., Kutzbach, J., and Cheng, J.: Transient Simulation of Last
Deglaciation with a New Mechanism for Bølling-Allerød Warming,
Science, 325, 310–314, https://doi.org/10.1126/science.1171041, 2009. a
Lochte, A. A., Repschläger, J., Kienast, M., Garbe-Schönberg, D., Andersen,
N., Hamann, C., and Schneider, R.: Labrador Sea freshening at 8.5 ka BP
caused by Hudson Bay Ice Saddle collapse, Nat. Commun., 10,
586, https://doi.org/10.1038/s41467-019-08408-6, 2019. a
Martos, Y. M., Catalán, M., Jordan, T. A., Golynsky, A., Golynsky, D.,
Eagles, G., and Vaughan, D. G.: Heat flux distribution of Antarctica
unveiled, Geophys. Res. Lett., 44, 11417–11426, 2017. a
Matero, I. S., Gregoire, L. J., and Ivanovic, R. F.: Simulations of the Early
Holocene demise of the Laurentide Ice Sheet with BISICLES (public trunk
r3298), Data set, UK Polar Data Centre, Natural Environment Research
Council, UK Research and Innovation,
https://doi.org/10.5285/7E0B2D81-EE71-48D6-A901-3B417D482072, 2019. a
Matero, I. S., Gregoire, L. J., and Ivanovic, R. F.: Public trunk revision 3298
of BISICLES and revision 23085 of Chombo version 3, Research Data Leeds,
University of Leeds, https://doi.org/10.5518/778, 2020. a
Morris, P. J., Swindles, G. T., Valdes, P. J., Ivanovic, R. F., Gregoire,
L. J., Smith, M. W., Tarasov, L., Haywood, A. M., and Bacon, K. L.: Global
peatland initiation driven by regionally asynchronous warming, P. Natl. Acad. Sci. USA, 115, 4851–4856, 2018. a
Motyka, R. J., Hunter, L., Echelmeyer, K. A., and Connor, C.: Submarine melting
at the terminus of a temperate tidewater glacier, LeConte Glacier,
Alaska, USA, Ann. Glaciol., 36, 57–65, 2003. a
Nias, I. J., Cornford, S. L., and Payne, A. J.: Contrasting the modelled
sensitivity of the Amundsen Sea Embayment ice streams, J.
Glaciol., 62, 552–562, https://doi.org/10.1017/jog.2016.40, 2016. a, b
Nick, F., Van der Veen, C. J., Vieli, A., and Benn, D.: A physically based
calving model applied to marine outlet glaciers and implications for the
glacier dynamics, J. Glaciol., 56, 781–794, 2010. a
Payne, A. and Dongelmans, P.: Self-organization in the thermomechanical flow of
ice sheets, J. Geophys. Res.-Sol. Ea., 102,
12219–12233, 1997. a
Reed, J., Wheeler, J., and Tucholke, B.: Geologic Map of North America – Perspectives and explanation, Decade of North American Geology, 1–28,
2005. a
Rignot, E. and Steffen, K.: Channelized bottom melting and stability of
floating ice shelves, Geophys. Res. Lett., 35, L02503, https://doi.org/10.1029/2007GL03176, 2008. a
Rignot, E., Bamber, J. L., Van Den Broeke, M. R., Davis, C., Li, Y., Van
De Berg, W. J., and Van Meijgaard, E.: Recent Antarctic ice mass loss from
radar interferometry and regional climate modelling, Nat. Geosci., 1,
106–110, 2008. a
Rignot, E., Koppes, M., and Velicogna, I.: Rapid submarine melting of the
calving faces of West Greenland glaciers, Nat. Geosci., 3, 187–191,
2010. a
Rutt, I. C., Hagdorn, M., Hulton, N., and Payne, A.: The Glimmer community ice
sheet model, J. Geophys. Res.-Earth Surf., 114, F02004, https://doi.org/10.1029/2008JF001015, 2009. a, b, c
Schmidt, G. A. and LeGrande, A. N.: The Goldilocks abrupt climate change
event, Quatern. Sci. Rev., 24, 1109–1110,
https://doi.org/10.1016/j.quascirev.2005.01.015,
2005. a
Schoof, C.: Ice sheet grounding line dynamics: Steady states, stability, and
hysteresis, J. Geophys. Res.-Earth Surf., 112, F03S28, https://doi.org/10.1029/2006JF000664, 2007. a
Schoof, C. and Hindmarsh, R. C. A.: Thin-Film Flows with Wall Slip:
An Asymptotic Analysis of Higher Order Glacier Flow Models, Q. J. Mech. Appl. Math., 63, 73–114, https://doi.org/10.1093/qjmam/hbp025, 2010. a, b
Shepherd, A. and Wingham, D.: Recent sea-level contributions of the Antarctic
and Greenland ice sheets, Science, 315, 1529–1532, 2007. a
Singarayer, J. S. and Valdes, P. J.: High-latitude climate sensitivity to
ice-sheet forcing over the last 120 kyr, Quatern. Sci. Rev., 29,
43–55, 2010. a
Singarayer, J. S., Valdes, P. J., Friedlingstein, P., Nelson, S., and Beerling,
D. J.: Late Holocene methane rise caused by orbitally controlled increase
in tropical sources, Nature, 470, 82–85, 2011. a
Stokes, C., Margold, M., Clark, C., and Tarasov, L.: Ice stream activity scaled
to ice sheet volume during Laurentide Ice Sheet deglaciation, Nature,
530, 322–326, 2016. a
Swindles, G. T., Morris, P. J., Whitney, B., Galloway, J. M., Gałka, M.,
Gallego-Sala, A., Macumber, A. L., Mullan, D., Smith, M. W., Amesbury, M. J.,
Rol, T. P., Sanei, H., Patterson, R. T., Sanderson, N., Parry, L., Charman, D. J., Lopez, O., Valderamma, E., Watson, E. J., Ivanovic, R. F., Valdes, P. J., Turner, T. E., and Lähteenoja, O.: Ecosystem state shifts during long-term development of an Amazonian
peatland, Glob. Change Biol., 24, 738–757, 2018. a
Tarasov, L. and Peltier, W. R.: A geophysically constrained large ensemble
analysis of the deglacial history of the North American ice-sheet
complex, Quatern. Sci. Rev., 23, 359–388, 2004. a
Taylor, K. E., Stouffer, R. J., and Meehl, G. A.: An overview of CMIP5 and
the experiment design, B. Am. Meteorol. Soc., 93,
485–498, 2012. a
Teller, J. T., Leverington, D. W., and Mann, J. D.: Freshwater outbursts to the oceans from glacial Lake Agassiz and their role in climate change during the last deglaciation, Quatern. Sci. Rev., 21, 879–887,
https://doi.org/10.1016/S0277-3791(01)00145-7, 2002. a
Trenberth, K. E. and Shea, D. J.: Relationships between precipitation and
surface temperature, Geophys. Res. Lett., 32, L14703, https://doi.org/10.1029/2005GL022760, 2005. a
Zwally, H. J., Abdalati, W., Herring, T., Larson, K., Saba, J., and Steffen,
K.: Surface melt-induced acceleration of Greenland ice-sheet flow, Science,
297, 218–222, 2002. a
Short summary
The Northern Hemisphere cooled by several degrees for a century 8000 years ago due to the collapse of an ice sheet in North America that released large amounts of meltwater into the North Atlantic and slowed down its circulation. We numerically model the ice sheet to understand its evolution during this event. Our results match data thanks to good ice dynamics but depend mostly on surface melt and snowfall. Further work will help us understand how past and future ice melt affects climate.
The Northern Hemisphere cooled by several degrees for a century 8000 years ago due to the...
