Articles | Volume 14, issue 6
https://doi.org/10.5194/tc-14-1951-2020
© 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/tc-14-1951-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Jun 2020
Research article |
| 18 Jun 2020
| 18 Jun 2020
Surface emergence of glacial plumes determined by fjord stratification
Department of Applied Mathematics, ETSI de Telecomunicación,
Universidad Politécnica de Madrid, Madrid, Spain
Donald A. Slater
Scripps Institution of Oceanography, University of California San
Diego, La Jolla, CA, USA
School of Geography and Sustainable Development, University of St. Andrews, St. Andrews, UK
Fiamma Straneo
Scripps Institution of Oceanography, University of California San
Diego, La Jolla, CA, USA
Jaime Otero
Department of Applied Mathematics, ETSI de Telecomunicación,
Universidad Politécnica de Madrid, Madrid, Spain
Sarah Das
Department of Geology and Geophysics, Woods Hole Oceanographic
Institution, Woods Hole, MA, USA
Francisco Navarro
Department of Applied Mathematics, ETSI de Telecomunicación,
Universidad Politécnica de Madrid, Madrid, Spain
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The Cryosphere, 14, 3033–3070, https://doi.org/10.5194/tc-14-3033-2020, https://doi.org/10.5194/tc-14-3033-2020, 2020
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Karina von Schuckmann, Lijing Cheng, Matthew D. Palmer, James Hansen, Caterina Tassone, Valentin Aich, Susheel Adusumilli, Hugo Beltrami, Tim Boyer, Francisco José Cuesta-Valero, Damien Desbruyères, Catia Domingues, Almudena García-García, Pierre Gentine, John Gilson, Maximilian Gorfer, Leopold Haimberger, Masayoshi Ishii, Gregory C. Johnson, Rachel Killick, Brian A. King, Gottfried Kirchengast, Nicolas Kolodziejczyk, John Lyman, Ben Marzeion, Michael Mayer, Maeva Monier, Didier Paolo Monselesan, Sarah Purkey, Dean Roemmich, Axel Schweiger, Sonia I. Seneviratne, Andrew Shepherd, Donald A. Slater, Andrea K. Steiner, Fiammetta Straneo, Mary-Louise Timmermans, and Susan E. Wijffels
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Sophie Nowicki, Heiko Goelzer, Hélène Seroussi, Anthony J. Payne, William H. Lipscomb, Ayako Abe-Ouchi, Cécile Agosta, Patrick Alexander, Xylar S. Asay-Davis, Alice Barthel, Thomas J. Bracegirdle, Richard Cullather, Denis Felikson, Xavier Fettweis, Jonathan M. Gregory, Tore Hattermann, Nicolas C. Jourdain, Peter Kuipers Munneke, Eric Larour, Christopher M. Little, Mathieu Morlighem, Isabel Nias, Andrew Shepherd, Erika Simon, Donald Slater, Robin S. Smith, Fiammetta Straneo, Luke D. Trusel, Michiel R. van den Broeke, and Roderik van de Wal
The Cryosphere, 14, 2331–2368, https://doi.org/10.5194/tc-14-2331-2020, https://doi.org/10.5194/tc-14-2331-2020, 2020
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Donald A. Slater, Denis Felikson, Fiamma Straneo, Heiko Goelzer, Christopher M. Little, Mathieu Morlighem, Xavier Fettweis, and Sophie Nowicki
The Cryosphere, 14, 985–1008, https://doi.org/10.5194/tc-14-985-2020, https://doi.org/10.5194/tc-14-985-2020, 2020
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The Cryosphere, 14, 855–879, https://doi.org/10.5194/tc-14-855-2020, https://doi.org/10.5194/tc-14-855-2020, 2020
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Revised manuscript not accepted
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Till J. W. Wagner, Fiamma Straneo, Clark G. Richards, Donald A. Slater, Laura A. Stevens, Sarah B. Das, and Hanumant Singh
The Cryosphere, 13, 911–925, https://doi.org/10.5194/tc-13-911-2019, https://doi.org/10.5194/tc-13-911-2019, 2019
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Marilena Oltmanns, Fiammetta Straneo, and Marco Tedesco
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Matthew Osman, Maria A. Zawadowicz, Sarah B. Das, and Daniel J. Cziczo
Atmos. Meas. Tech., 10, 4459–4477, https://doi.org/10.5194/amt-10-4459-2017, https://doi.org/10.5194/amt-10-4459-2017, 2017
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This study presents the first-time attempt at using time-of-flight single particle mass spectrometry (SPMS) as an emerging online technique for measuring insoluble particles in glacial snow and ice. Using samples from two Greenlandic ice cores, we show that SPMS can constrain the aerodynamic size, composition, and relative abundance of most particulate types on a per-particle basis, reducing the preparation time and resources required of conventional, filter-based particle retrieval methods.
Matthew Osman, Sarah B. Das, Olivier Marchal, and Matthew J. Evans
The Cryosphere, 11, 2439–2462, https://doi.org/10.5194/tc-11-2439-2017, https://doi.org/10.5194/tc-11-2439-2017, 2017
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Francisco Machío, Ricardo Rodríguez-Cielos, Francisco Navarro, Javier Lapazaran, and Jaime Otero
Earth Syst. Sci. Data, 9, 751–764, https://doi.org/10.5194/essd-9-751-2017, https://doi.org/10.5194/essd-9-751-2017, 2017
Johannes Jakob Fürst, Fabien Gillet-Chaulet, Toby J. Benham, Julian A. Dowdeswell, Mariusz Grabiec, Francisco Navarro, Rickard Pettersson, Geir Moholdt, Christopher Nuth, Björn Sass, Kjetil Aas, Xavier Fettweis, Charlotte Lang, Thorsten Seehaus, and Matthias Braun
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Ricardo Rodríguez Cielos, Julián Aguirre de Mata, Andrés Díez Galilea, Marina Álvarez Alonso, Pedro Rodríguez Cielos, and Francisco Navarro Valero
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The study of glacier fronts combines different geomatics measurement techniques. It is practically impossible to realize, in the case of glacier fronts that end up in the sea (tide water glaciers). The images obtained from the front come from a non-metric digital camera. The result of observations obtained were applied to study the temporal evolution (1957–2014) of the position of the Johnsons glacier and the position of the Hurd glacier, near BAE Juan Carlos I in Livingston Island (Antarctica).
B. Osmanoglu, F. J. Navarro, R. Hock, M. Braun, and M. I. Corcuera
The Cryosphere, 8, 1807–1823, https://doi.org/10.5194/tc-8-1807-2014, https://doi.org/10.5194/tc-8-1807-2014, 2014
Related subject area
Discipline: Ice sheets | Subject: Ocean Interactions
Brief communication: Sea-level projections, adaptation planning, and actionable science
Local forcing mechanisms challenge parameterizations of ocean thermal forcing for Greenland tidewater glaciers
Modelling Antarctic ice shelf basal melt patterns using the one-layer Antarctic model for dynamical downscaling of ice–ocean exchanges (LADDIE v1.0)
Basal melt rates and ocean circulation under the Ryder Glacier ice tongue and their response to climate warming: a high-resolution modelling study
Can rifts alter ocean dynamics beneath ice shelves?
Large-eddy simulations of the ice-shelf–ocean boundary layer near the ice front of Nansen Ice Shelf, Antarctica
The impact of tides on Antarctic ice shelf melting
Layered seawater intrusion and melt under grounded ice
The Antarctic Coastal Current in the Bellingshausen Sea
Twenty-first century ocean forcing of the Greenland ice sheet for modelling of sea level contribution
Exploring mechanisms responsible for tidal modulation in flow of the Filchner–Ronne Ice Shelf
Melt at grounding line controls observed and future retreat of Smith, Pope, and Kohler glaciers
Sensitivity of a calving glacier to ice–ocean interactions under climate change: new insights from a 3-D full-Stokes model
Brief communication: PICOP, a new ocean melt parameterization under ice shelves combining PICO and a plume model
Seasonal dynamics of Totten Ice Shelf controlled by sea ice buttressing
Grounding line migration through the calving season at Jakobshavn Isbræ, Greenland, observed with terrestrial radar interferometry
William H. Lipscomb, David Behar, and Monica Ainhorn Morrison
EGUsphere, https://doi.org/10.5194/egusphere-2024-534, https://doi.org/10.5194/egusphere-2024-534, 2024
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As communities try to adapt to climate change, they look for “actionable science” that can inform decision-making. There are risks in relying on novel results that are not yet accepted by the science community. We propose a practical criterion for determining which scientific claims are actionable. We show how premature acceptance of sea-level rise predictions can lead to confusion and backtracking, and we suggest best practices for communication between scientists and adaptation planners.
Alexander O. Hager, David A. Sutherland, and Donald A. Slater
The Cryosphere, 18, 911–932, https://doi.org/10.5194/tc-18-911-2024, https://doi.org/10.5194/tc-18-911-2024, 2024
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Warming ocean temperatures cause considerable ice loss from the Greenland Ice Sheet; however climate models are unable to resolve the complex ocean processes within fjords that influence near-glacier ocean temperatures. Here, we use a computer model to test the accuracy of assumptions that allow climate and ice sheet models to project near-glacier ocean temperatures, and thus glacier melt, into the future. We then develop new methods that improve accuracy by accounting for local ocean processes.
Erwin Lambert, André Jüling, Roderik S. W. van de Wal, and Paul R. Holland
The Cryosphere, 17, 3203–3228, https://doi.org/10.5194/tc-17-3203-2023, https://doi.org/10.5194/tc-17-3203-2023, 2023
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A major uncertainty in the study of sea level rise is the melting of the Antarctic ice sheet by the ocean. Here, we have developed a new model, named LADDIE, that simulates this ocean-driven melting of the floating parts of the Antarctic ice sheet. This model simulates fine-scale patterns of melting and freezing and requires significantly fewer computational resources than state-of-the-art ocean models. LADDIE can be used as a new tool to force high-resolution ice sheet models.
Jonathan Wiskandt, Inga Monika Koszalka, and Johan Nilsson
The Cryosphere, 17, 2755–2777, https://doi.org/10.5194/tc-17-2755-2023, https://doi.org/10.5194/tc-17-2755-2023, 2023
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Understanding ice–ocean interactions under floating ice tongues in Greenland and Antarctica is a major challenge in climate modelling and a source of uncertainty in future sea level projections. We use a high-resolution ocean model to investigate basal melting and melt-driven circulation under the floating tongue of Ryder Glacier, northwestern Greenland. We study the response to oceanic and atmospheric warming. Our results are universal and relevant for the development of climate models.
Mattia Poinelli, Michael Schodlok, Eric Larour, Miren Vizcaino, and Riccardo Riva
The Cryosphere, 17, 2261–2283, https://doi.org/10.5194/tc-17-2261-2023, https://doi.org/10.5194/tc-17-2261-2023, 2023
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Rifts are fractures on ice shelves that connect the ice on top to the ocean below. The impact of rifts on ocean circulation below Antarctic ice shelves has been largely unexplored as ocean models are commonly run at resolutions that are too coarse to resolve the presence of rifts. Our model simulations show that a kilometer-wide rift near the ice-shelf front modulates heat intrusion beneath the ice and inhibits basal melt. These processes are therefore worthy of further investigation.
Ji Sung Na, Taekyun Kim, Emilia Kyung Jin, Seung-Tae Yoon, Won Sang Lee, Sukyoung Yun, and Jiyeon Lee
The Cryosphere, 16, 3451–3468, https://doi.org/10.5194/tc-16-3451-2022, https://doi.org/10.5194/tc-16-3451-2022, 2022
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Beneath the Antarctic ice shelf, sub-ice-shelf plume flow that can cause turbulent mixing exists. In this study, we investigate how this flow affects ocean dynamics and ice melting near the ice front. Our results obtained by validated simulation show that higher turbulence intensity results in vigorous ice melting due to the high heat entrainment. Moreover, this flow with meltwater created by this flow highly affects the ocean overturning circulations near the ice front.
Ole Richter, David E. Gwyther, Matt A. King, and Benjamin K. Galton-Fenzi
The Cryosphere, 16, 1409–1429, https://doi.org/10.5194/tc-16-1409-2022, https://doi.org/10.5194/tc-16-1409-2022, 2022
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Tidal currents may play an important role in Antarctic ice sheet retreat by changing the rate at which the ocean melts glaciers. Here, using a computational ocean model, we derive the first estimate of present-day tidal melting that covers all of Antarctica. Our results suggest that large-scale ocean models aiming to accurately predict ice melt rates will need to account for the effects of tides. The inclusion of tide-induced friction at the ice–ocean interface should be prioritized.
Alexander A. Robel, Earle Wilson, and Helene Seroussi
The Cryosphere, 16, 451–469, https://doi.org/10.5194/tc-16-451-2022, https://doi.org/10.5194/tc-16-451-2022, 2022
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Warm seawater may intrude as a thin layer below glaciers in contact with the ocean. Mathematical theory predicts that this intrusion may extend over distances of kilometers under realistic conditions. Computer models demonstrate that if this warm seawater causes melting of a glacier bottom, it can cause rates of glacier ice loss and sea level rise to be up to 2 times faster in response to potential future ocean warming.
Ryan Schubert, Andrew F. Thompson, Kevin Speer, Lena Schulze Chretien, and Yana Bebieva
The Cryosphere, 15, 4179–4199, https://doi.org/10.5194/tc-15-4179-2021, https://doi.org/10.5194/tc-15-4179-2021, 2021
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The Antarctic Coastal Current (AACC) is an ocean current found along the coast of Antarctica. Using measurements of temperature and salinity collected by instrumented seals, the AACC is shown to be a continuous circulation feature throughout West Antarctica. Due to its proximity to the coast, the AACC's structure influences oceanic melting of West Antarctic ice shelves. These melt rates impact the stability of the West Antarctic Ice Sheet with global implications for future sea level change.
Donald A. Slater, Denis Felikson, Fiamma Straneo, Heiko Goelzer, Christopher M. Little, Mathieu Morlighem, Xavier Fettweis, and Sophie Nowicki
The Cryosphere, 14, 985–1008, https://doi.org/10.5194/tc-14-985-2020, https://doi.org/10.5194/tc-14-985-2020, 2020
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Changes in the ocean around Greenland play an important role in determining how much the ice sheet will contribute to global sea level over the coming century. However, capturing these links in models is very challenging. This paper presents a strategy enabling an ensemble of ice sheet models to feel the effect of the ocean for the first time and should therefore result in a significant improvement in projections of the Greenland ice sheet's contribution to future sea level change.
Sebastian H. R. Rosier and G. Hilmar Gudmundsson
The Cryosphere, 14, 17–37, https://doi.org/10.5194/tc-14-17-2020, https://doi.org/10.5194/tc-14-17-2020, 2020
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The flow of ice shelves is now known to be strongly affected by ocean tides, but the mechanism by which this happens is unclear. We use a viscoelastic model to try to reproduce observations of this behaviour on the Filchner–Ronne Ice Shelf in Antarctica. We find that tilting of the ice shelf explains the short-period behaviour, while tidally induced movement of the grounding line (the boundary between grounded and floating ice) explains the more complex long-period response.
David A. Lilien, Ian Joughin, Benjamin Smith, and Noel Gourmelen
The Cryosphere, 13, 2817–2834, https://doi.org/10.5194/tc-13-2817-2019, https://doi.org/10.5194/tc-13-2817-2019, 2019
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We used a number of computer simulations to understand the recent retreat of a rapidly changing group of glaciers in West Antarctica. We found that significant melt underneath the floating extensions of the glaciers, driven by relatively warm ocean water at depth, was likely needed to cause the large retreat that has been observed. If melt continues around current rates, retreat is likely to continue through the coming century and extend beyond the present-day drainage area of these glaciers.
Joe Todd, Poul Christoffersen, Thomas Zwinger, Peter Råback, and Douglas I. Benn
The Cryosphere, 13, 1681–1694, https://doi.org/10.5194/tc-13-1681-2019, https://doi.org/10.5194/tc-13-1681-2019, 2019
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The Greenland Ice Sheet loses 30 %–60 % of its ice due to iceberg calving. Calving processes and their links to climate are not well understood or incorporated into numerical models of glaciers. Here we use a new 3-D calving model to investigate calving at Store Glacier, West Greenland, and test its sensitivity to increased submarine melting and reduced support from ice mélange (sea ice and icebergs). We find Store remains fairly stable despite these changes, but less so in the southern side.
Tyler Pelle, Mathieu Morlighem, and Johannes H. Bondzio
The Cryosphere, 13, 1043–1049, https://doi.org/10.5194/tc-13-1043-2019, https://doi.org/10.5194/tc-13-1043-2019, 2019
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How ocean-induced melt under floating ice shelves will change as ocean currents evolve remains a big uncertainty in projections of sea level rise. In this study, we combine two of the most recently developed melt models to form PICOP, which overcomes the limitations of past models and produces accurate ice shelf melt rates. We find that our model is easy to set up and computationally efficient, providing researchers an important tool to improve the accuracy of their future glacial projections.
Chad A. Greene, Duncan A. Young, David E. Gwyther, Benjamin K. Galton-Fenzi, and Donald D. Blankenship
The Cryosphere, 12, 2869–2882, https://doi.org/10.5194/tc-12-2869-2018, https://doi.org/10.5194/tc-12-2869-2018, 2018
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We show that Totten Ice Shelf accelerates each spring in response to the breakup of seasonal landfast sea ice at the ice shelf calving front. The previously unreported seasonal flow variability may have aliased measurements in at least one previous study of Totten's response to ocean forcing on interannual timescales. The role of sea ice in buttressing the flow of the ice shelf implies that long-term changes in sea ice cover could have impacts on the mass balance of the East Antarctic Ice Sheet.
Surui Xie, Timothy H. Dixon, Denis Voytenko, Fanghui Deng, and David M. Holland
The Cryosphere, 12, 1387–1400, https://doi.org/10.5194/tc-12-1387-2018, https://doi.org/10.5194/tc-12-1387-2018, 2018
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Time-varying velocity and topography of the terminus of Jakobshavn Isbræ were observed with a terrestrial radar interferometer in three summer campaigns (2012, 2015, 2016). Surface elevation and tidal responses of ice speed suggest a narrow floating zone in early summer, while in late summer the entire glacier is likely grounded. We hypothesize that Jakobshavn Isbræ advances a few km in winter to form a floating zone but loses this floating portion in the subsequent summer through calving.
Cited articles
Arimitsu, M. L., Piatt, J. F., Madison, E. N., Conaway, J. S., and
Hillgruber, N.: Oceanographic gradients and seabird prey community dynamics
in glacial fjords, Fish. Oceanogr., 21, 148–169,
https://doi.org/10.1111/j.1365-2419.2012.00616.x, 2012.
Arrigo, K. R., van Dijken, G. L., Castelao, R. M., Luo, H., Rennermalm,
Å. K., Tedesco, M., Mote, T. L., Oliver, H., and Yager, P. L.: Melting
glaciers stimulate large summer phytoplankton blooms in southwest Greenland
waters, Geophys. Res. Lett., 44, 6278–6285, https://doi.org/10.1002/2017GL073583,
2017.
Baines, P. G.: Two-dimensional plumes in stratified environments, J. Fluid
Mech., 471, 315–337, https://doi.org/10.1017/S0022112002002215, 2002.
Bamber, J., van den Broeke, M., Ettema, J., Lenaerts, J., and Rignot, E.:
Recent large increases in freshwater fluxes from Greenland into the North
Atlantic, Geophys. Res. Lett., 39, L19501, https://doi.org/10.1029/2012GL052552, 2012.
Bhatia, M. P., Kujawinski, E. B., Das, S. B., Breier, C. F., Henderson, P.
B., and Charette, M. A.: Greenland meltwater as a significant and potentially
bioavailable source of iron to the ocean, Nat. Geosci., 6, 274–278,
https://doi.org/10.1038/ngeo1746, 2013.
Bleninger, T. and Jirka, G.: Near- and far-field model coupling methodology
for wastewater discharges, in: Environmental Hydraulics and Sustainable Water
Management, Two Volume Set, vol. 1, edited by: Lee, J. H. W. and Lam, K. M.,
CRC Press, London, 447–453, 2004.
Böning, C. W., Behrens, E., Biastoch, A., Getzlaff, K., and Bamber, J.
L.: Emerging impact of Greenland meltwater on deepwater formation in the
North Atlantic Ocean, Nat. Geosci., 9, 523–527, https://doi.org/10.1038/ngeo2740,
2016.
Campbell, F. M. A., Nienow, P. W., and Purves, R. S.: Role of the
supraglacial snowpack in mediating meltwater delivery to the glacier system
as inferred from dye tracer investigations, Hydrol. Process., 20,
969–985, https://doi.org/10.1002/hyp.6115, 2006.
Cape, M. R., Straneo, F., Beaird, N., Bundy, R. M., and Charette, M. A.:
Nutrient release to oceans from buoyancy-driven upwelling at Greenland
tidewater glaciers, Nat. Geosci., 12, 34–39,
https://doi.org/10.1038/s41561-018-0268-4, 2019.
Carazzo, G., Kaminski, E., and Tait, S.: On the rise of turbulent plumes:
Quantitative effects of variable entrainment for submarine hydrothermal
vents, terrestrial and extra terrestrial explosive volcanism, J. Geophys.
Res., 113, B90201, https://doi.org/10.1029/2007JB005458, 2008.
Carroll, D., Sutherland, D. A., Shroyer, E. L., Nash, J. D., Catania, G. A.,
and Stearns, L. A.: Modeling Turbulent Subglacial Meltwater Plumes:
Implications for Fjord-Scale Buoyancy-Driven Circulation, J. Phys.
Oceanogr., 45, 2169–2185, https://doi.org/10.1175/JPO-D-15-0033.1, 2015.
Carroll, D., Sutherland, D. A., Hudson, B., Moon, T., Catania, G. A.,
Shroyer, E. L., Nash, J. D., Bartholomaus, T. C., Felikson, D., Stearns, L.
A., Noël, B. P. Y., and van den Broeke, M. R.: The impact of glacier
geometry on meltwater plume structure and submarine melt in Greenland
fjords, Geophys. Res. Lett., 43, 9739–9748, https://doi.org/10.1002/2016GL070170,
2016.
Caufield, C. P. and Woods, A. W.: Turbulent gravitational convection from a
point source in a non-uniformly stratified environment, J. Fluid Mech., 360,
229–248, https://doi.org/10.1017/S0022112098008623, 1998.
Cowton, T., Nienow, P., Sole, A., Wadham, J., Lis, G., Bartholomew, I.,
Mair, D., and Chandler, D.: Evolution of drainage system morphology at a
land-terminating Greenlandic outlet glacier, J. Geophys. Res.-Earth,
118, 29–41, https://doi.org/10.1029/2012JF002540, 2013.
Cowton, T., Sole, A., Nienow, P., Slater, D., Wilton, D., and Hanna, E.:
Controls on the transport of oceanic heat to Kangerdlugssuaq Glacier, East
Greenland, J. Glaciol., 62, 1167–1180, https://doi.org/10.1017/jog.2016.117, 2016.
Cuffey, K. M. and Paterson, W. S. B.: The Physics of Glaciers, 4th Edn.,
Elsevier, Oxford, UK, 2010.
Curry, B., Lee, C. M., Petrie, B., Moritz, R. E., and Kwok, R.: Multiyear
Volume, Liquid Freshwater, and Sea Ice Transports through Davis Strait,
2004–10*, J. Phys. Oceanogr., 44, 1244–1266,
https://doi.org/10.1175/JPO-D-13-0177.1, 2014.
De Andrés, E., Otero, J., Navarro, F., Prominska, A., Lapazaran, J., and
Walczowski, W.: A two-dimensional glacier–fjord coupled model applied to
estimate submarine melt rates and front position changes of Hansbreen,
Svalbard, J. Glaciol., 64, 745–758, https://doi.org/10.1017/jog.2018.61, 2018.
Enderlin, E. M., Howat, I. M., Jeong, S., Noh, M.-J., van Angelen, J. H., and
van den Broeke, M. R.: An improved mass budget for the Greenland ice sheet,
Geophys. Res. Lett., 41, 866–872, https://doi.org/10.1002/2013GL059010, 2014.
Enderlin, E. M., Hamilton, G. S., Straneo, F., and Sutherland, D. A.: Iceberg
meltwater fluxes dominate the freshwater budget in Greenland's
iceberg-congested glacial fjords, Geophys. Res. Lett., 43,
11287–11294, https://doi.org/10.1002/2016GL070718, 2016.
Fountain, A. G. and Walder, J. S.: Water flow through temperate glaciers,
Rev. Geophys., 36, 299–328, https://doi.org/10.1029/97RG03579, 1998.
Fried, M. J., Catania, G. A., Bartholomaus, T. C., Duncan, D., Davis, M.,
Stearns, L. A., Nash, J., Shroyer, E., and Sutherland, D.: Distributed
subglacial discharge drives significant submarine melt at a Greenland
tidewater glacier, Geophys. Res. Lett., 42, 9328–9336,
https://doi.org/10.1002/2015GL065806, 2015.
Gladish, C. V., Holland, D. M., Rosing-Asvid, A., Behrens, J. W., and Boje,
J.: Oceanic Boundary Conditions for Jakobshavn Glacier. Part I: Variability
and Renewal of Ilulissat Icefjord Waters, 2001–14, J. Phys. Oceanogr.,
45, 3–32, https://doi.org/10.1175/JPO-D-14-0044.1, 2015a.
Gladish, C. V., Holland, D. M., and Lee, C. M.: Oceanic Boundary Conditions
for Jakobshavn Glacier. Part II: Provenance and Sources of Variability of
Disko Bay and Ilulissat Icefjord Waters, 1990–2011, J. Phys. Oceanogr.,
45, 33–63, https://doi.org/10.1175/JPO-D-14-0045.1, 2015b.
Greenwood, S. L., Clason, C. C., Helanow, C. and Margold, M.: Theoretical,
contemporary observational and palaeo-perspectives on ice sheet hydrology:
Processes and products, Earth-Sci. Rev., 155, 1–27,
https://doi.org/10.1016/j.earscirev.2016.01.010, 2016.
Holland, D. M. and Jenkins, A.: Modeling Thermodynamic Ice–Ocean
Interactions at the Base of an Ice Shelf, J. Phys. Oceanogr., 29,
1787–1800, https://doi.org/10.1175/1520-0485(1999)029<1787:MTIOIA>2.0.CO;2, 1999.
Hopwood, M. J., Carroll, D., Browning, T. J., Meire, L., Mortensen, J.,
Krisch, S., and Achterberg, E. P.: Non-linear response of summertime marine
productivity to increased meltwater discharge around Greenland, Nat.
Commun., 9, 3256, https://doi.org/10.1038/s41467-018-05488-8, 2018.
How, P., Schild, K. M., Benn, D. I., Noormets, R., Kirchner, N., Luckman,
A., Vallot, D., Hulton, N. R. J., and Borstad, C.: Calving controlled by
melt-under-cutting: detailed calving styles revealed through time-lapse
observations, Ann. Glaciol., 60, 20–31, https://doi.org/10.1017/aog.2018.28, 2019.
IOC, SCOR and IAPSO: The international thermodynamic equation of
seawater–2010: Calculation and use of thermodynamic properties,
Intergovernmental Oceanographic Commission, Manuals and Guides No. 56,
UNESCO, 166 pp., 2010.
Jackson, R. H., Straneo, F., and Sutherland, D. A.: Externally forced
fluctuations in ocean temperature at Greenland glaciers in non-summer
months, Nat. Geosci., 7, 503–508, https://doi.org/10.1038/ngeo2186, 2014.
Jackson, R. H., Shroyer, E. L., Nash, J. D., Sutherland, D. A., Carroll, D.,
Fried, M. J., Catania, G. A., Bartholomaus, T. C., and Stearns, L. A.:
Near-glacier surveying of a subglacial discharge plume: Implications for
plume parameterizations, Geophys. Res. Lett., 44, 6886–6894,
https://doi.org/10.1002/2017GL073602, 2017.
Jenkins, A.: Convection-Driven Melting near the Grounding Lines of Ice
Shelves and Tidewater Glaciers, J. Phys. Oceanogr., 41, 2279–2294,
https://doi.org/10.1175/JPO-D-11-03.1, 2011.
Jirka, G. H.: Integral Model for Turbulent Buoyant Jets in Unbounded
Stratified Flows. Part I: Single Round Jet, Environ. Fluid Mech., 4,
1–56, https://doi.org/10.1023/A:1025583110842, 2004.
Jiskoot, H., Juhlin, D., St Pierre, H., and Citterio, M.: Tidewater glacier
fluctuations in central East Greenland coastal and fjord regions
(1980s–2005), Ann. Glaciol., 53, 35–44, https://doi.org/10.3189/2012AoG60A030,
2012.
Kimura, S., Holland, P. R., Jenkins, A., and Piggott, M.: The Effect of
Meltwater Plumes on the Melting of a Vertical Glacier Face, J. Phys.
Oceanogr., 44, 3099–3117, https://doi.org/10.1175/JPO-D-13-0219.1, 2014.
Korsun, S. and Hald, M.: Seasonal dynamics of benthic foraminifera in a
glacially fed fjord of Svalbard, European Arctic, J. Foramin. Res.,
30, 251–271, https://doi.org/10.2113/0300251, 2000.
List, E. J.: Turbulent Jets and Plumes, Annu. Rev. Fluid Mech., 14,
189–212, https://doi.org/10.1146/annurev.fl.14.010182.001201, 1982.
Lliboutry, L.: Modifications to the Theory of Intraglacial Waterways for the
Case of Subglacial Ones, J. Glaciol., 29, 216–226,
https://doi.org/10.3189/S0022143000008273, 1983.
Luckman, A., Benn, D. I., Cottier, F., Bevan, S., Nilsen, F., and Inall, M.:
Calving rates at tidewater glaciers vary strongly with ocean temperature,
Nat. Commun., 6, 1–7, https://doi.org/10.1038/ncomms9566, 2015.
Luo, H., Castelao, R. M., Rennermalm, A. K., Tedesco, M., Bracco, A., Yager,
P. L., and Mote, T. L.: Oceanic transport of surface meltwater from the
southern Greenland ice sheet, Nat. Geosci., 9, 528–532,
https://doi.org/10.1038/ngeo2708, 2016.
Mankoff, K. D., Straneo, F., Cenedese, C., Das, S. B., Richards, C. G., and
Singh, H.: Structure and dynamics of a subglacial discharge plume in a
Greenlandic fjord, J. Geophys. Res.-Oceans, 121, 8670–8688,
https://doi.org/10.1002/2016JC011764, 2016.
McDougall, T. J. and Barker, P. M.: Getting started with TEO-10 and the
Gibbs Seawarer Oceanographic Toolbox, v3.05, 28 pp., edited by: SCOR/IAPSO
WG127, 2011.
Meire, L., Søgaard, D. H., Mortensen, J., Meysman, F. J. R., Soetaert, K., Arendt, K. E., Juul-Pedersen, T., Blicher, M. E., and Rysgaard, S.: Glacial meltwater and primary production are drivers of strong CO2 uptake in fjord and coastal waters adjacent to the Greenland Ice Sheet, Biogeosciences, 12, 2347–2363, https://doi.org/10.5194/bg-12-2347-2015, 2015.
Meire, L., Mortensen, J., Meire, P., Juul-Pedersen, T., Sejr, M. K.,
Rysgaard, S., Nygaard, R., Huybrechts, P., and Meysman, F. J. R.:
Marine-terminating glaciers sustain high productivity in Greenland fjords,
Glob. Change Biol., 23, 5344–5357, https://doi.org/10.1111/gcb.13801, 2017.
Moon, T., Joughin, I., Smith, B., and Howat, I.: 21st-Century Evolution of
Greenland Outlet Glacier Velocities, Science, 336, 576–578,
https://doi.org/10.1126/science.1219985, 2012.
Moon, T., Sutherland, D. A., Carroll, D., Felikson, D., Kehrl, L., and
Straneo, F.: Subsurface iceberg melt key to Greenland fjord freshwater
budget, Nat. Geosci., 11, 49–54, https://doi.org/10.1038/s41561-017-0018-z, 2018.
Mortensen, J., Bendtsen, J., Motyka, R. J., Lennert, K., Truffer, M.,
Fahnestock, M., and Rysgaard, S.: On the seasonal freshwater stratification
in the proximity of fast-flowing tidewater outlet glaciers in a sub-Arctic
sill fjord, J. Geophys. Res.-Oceans, 118, 1382–1395,
https://doi.org/10.1002/jgrc.20134, 2013.
Morton, B. R., Taylor, G., and Turner, J. S.: Turbulent Gravitational
Convection from Maintained and Instantaneous Sources, P. R. Soc. A, 234, 1–23, https://doi.org/10.1098/rspa.1956.0011, 1956.
Motyka, R. J., Dryer, W. P., Amundson, J., Truffer, M., and Fahnestock, M.:
Rapid submarine melting driven by subglacial discharge, LeConte Glacier,
Alaska, Geophys. Res. Lett., 40, 5153–5158, https://doi.org/10.1002/grl.51011,
2013.
Mugford, R. I. and Dowdeswell, J. A.: Modeling glacial meltwater plume
dynamics and sedimentation in high-latitude fjords, J. Geophys. Res.-Earth, 116, F01023, https://doi.org/10.1029/2010JF001735, 2011.
Nghiem, S. V., Hall, D. K., Mote, T. L., Tedesco, M., Albert, M. R., Keegan,
K., Shuman, C. A., DiGirolamo, N. E., and Neumann, G.: The extreme melt
across the Greenland ice sheet in 2012, Geophys. Res. Lett., 39, L20502,
https://doi.org/10.1029/2012GL053611, 2012.
O'Leary, M. and Christoffersen, P.: Calving on tidewater glaciers amplified by submarine frontal melting, The Cryosphere, 7, 119–128, https://doi.org/10.5194/tc-7-119-2013, 2013.
Oliver, H., Luo, H., Castelao, R. M., van Dijken, G. L., Mattingly, K. S.,
Rosen, J. J., Mote, T. L., Arrigo, K. R., Rennermalm, Å. K., Tedesco, M.,
and Yager, P. L.: Exploring the Potential Impact of Greenland Meltwater on
Stratification, Photosynthetically Active Radiation, and Primary Production
in the Labrador Sea, J. Geophys. Res.-Oceans, 123, 2570–2591,
https://doi.org/10.1002/2018JC013802, 2018.
Rabe, B., Karcher, M., Schauer, U., Toole, J. M., Krishfield, R. A.,
Pisarev, S., Kauker, F., Gerdes, R., and Kikuchi, T.: An assessment of Arctic
Ocean freshwater content changes from the 1990s to the 2006–2008 period,
Deep-Sea Res. Pt. I, 58, 173–185,
https://doi.org/10.1016/j.dsr.2010.12.002, 2011.
Rignot, E., Velicogna, I., van den Broeke, M. R., Monaghan, A., and Lenaerts,
J. T. M.: Acceleration of the contribution of the Greenland and Antarctic
ice sheets to sea level rise, Geophys. Res. Lett., 38, L05503,
https://doi.org/10.1029/2011GL046583, 2011.
Saenko, O. A., Yang, D., and Myers, P. G.: Response of the North Atlantic
dynamic sea level and circulation to Greenland meltwater and climate change
in an eddy-permitting ocean model, Clim. Dynam., 49, 2895–2910,
https://doi.org/10.1007/s00382-016-3495-7, 2017.
Schild, K. M., Hawley, R. L., and Morriss, B. F.: Subglacial hydrology at
Rink Isbræ, West Greenland inferred from sediment plume appearance, Ann.
Glaciol., 57, 118–127, https://doi.org/10.1017/aog.2016.1, 2016.
Schild, K. M., Renshaw, C. E., Benn, D. I., Luckman, A., Hawley, R. L., How,
P., Trusel, L., Cottier, F. R., Pramanik, A., and Hulton, N. R. J.: Glacier
Calving Rates Due to Subglacial Discharge, Fjord Circulation, and Free
Convection, J. Geophys. Res.-Earth, 123, 2189–2204,
https://doi.org/10.1029/2017JF004520, 2018.
Sciascia, R., Straneo, F., Cenedese, C., and Heimbach, P.: Seasonal
variability of submarine melt rate and circulation in an East Greenland
fjord, J. Geophys. Res.-Oceans, 118, 2492–2506, https://doi.org/10.1002/jgrc.20142,
2013.
Shepherd, A., Ivins, E. R., A, G., Barletta, V. R., Bentley, M. J.,
Bettadpur, S., Briggs, K. H., Bromwich, D. H., Forsberg, R., Galin, N.,
Horwath, M., Jacobs, S., Joughin, I., King, M. A., Lenaerts, J. T. M., Li,
J., Ligtenberg, S. R. M., Luckman, A., Luthcke, S. B., McMillan, M.,
Meister, R., Milne, G., Mouginot, J., Muir, A., Nicolas, J. P., Paden, J.,
Payne, A. J., Pritchard, H., Rignot, E., Rott, H., Sorensen, L. S., Scambos,
T. A., Scheuchl, B., Schrama, E. J. O., Smith, B., Sundal, A. V., van
Angelen, J. H., van de Berg, W. J., van den Broeke, M. R., Vaughan, D. G.,
Velicogna, I., Wahr, J., Whitehouse, P. L., Wingham, D. J., Yi, D., Young,
D., and Zwally, H. J.: A Reconciled Estimate of Ice-Sheet Mass Balance,
Science, 338, 1183–1189, https://doi.org/10.1126/science.1228102, 2012.
Slater, D., Nienow, P., Sole, A., Cowton, T., Mottram, R., Langen, P., and
Mair, D.: Spatially distributed runoff at the grounding line of a large
Greenlandic tidewater glacier inferred from plume modelling, J. Glaciol.,
63, 309–323, https://doi.org/10.1017/jog.2016.139, 2017.
Slater, D. A., Nienow, P. W., Cowton, T. R., Goldberg, D. N., and Sole, A.
J.: Effect of near-terminus subglacial hydrology on tidewater glacier
submarine melt rates, Geophys. Res. Lett., 42, 2861–2868,
https://doi.org/10.1002/2014GL062494, 2015.
Slater, D. A., Goldberg, D. N., Nienow, P. W., and Cowton, T. R.: Scalings
for Submarine Melting at Tidewater Glaciers from Buoyant Plume Theory, J.
Phys. Oceanogr., 46, 1839–1855, https://doi.org/10.1175/JPO-D-15-0132.1, 2016.
Slater, D. A., Straneo, F., Das, S. B., Richards, C. G., Wagner, T. J. W.,
and Nienow, P. W.: Localized Plumes Drive Front-Wide Ocean Melting of A
Greenlandic Tidewater Glacier, Geophys. Res. Lett., 45, 12350–12358,
https://doi.org/10.1029/2018GL080763, 2018.
Slater, D. A., Straneo, F., Felikson, D., Little, C. M., Goelzer, H., Fettweis, X., and Holte, J.: Estimating Greenland tidewater glacier retreat driven by submarine melting, The Cryosphere, 13, 2489–2509, https://doi.org/10.5194/tc-13-2489-2019, 2019.
Smith, L. C., Chu, V. W., Yang, K., Gleason, C. J., Pitcher, L. H.,
Rennermalm, A. K., Legleiter, C. J., Behar, A. E., Overstreet, B. T.,
Moustafa, S. E., Tedesco, M., Forster, R. R., LeWinter, A. L., Finnegan, D.
C., Sheng, Y., and Balog, J.: Efficient meltwater drainage through
supraglacial streams and rivers on the southwest Greenland ice sheet, P.
Natl. Acad. Sci. USA, 112, 1001–1006, https://doi.org/10.1073/pnas.1413024112, 2015.
Stevens, L. A., Straneo, F., Das, S. B., Plueddemann, A. J., Kukulya, A. L., and Morlighem, M.: Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations, The Cryosphere, 10, 417–432, https://doi.org/10.5194/tc-10-417-2016, 2016.
Straneo, F.: Temperature and salinity profiles adjacent to a tidewater glacier in Sarqardleq Fjord, West Greenland, collected during July 2013, Arctic Data Center, https://doi.org/10.18739/A2B853H78, 2019.
Straneo, F.: Water temperature, salinity, and velocity taken by CTD and ADCP from a small boat and remote-controlled surface vehicle from 2012-07-16 to 2012-07-25 in Sarqardleq Fjord, Greenland (NCEI Accession 0210572), NOAA National Centers for Environmental Information, Dataset, available at: https://accession.nodc.noaa.gov/0210572 (last access: 15 June 2020), 2020.
Straneo, F. and Cenedese, C.: The Dynamics of Greenland's Glacial Fjords and
Their Role in Climate, Annu. Rev. Mar. Sci., 7, 89–112,
https://doi.org/10.1146/annurev-marine-010213-135133, 2015.
Straneo, F., Curry, R. G., Sutherland, D. A., Hamilton, G. S., Cenedese, C.,
Våge, K., and Stearns, L. A.: Impact of fjord dynamics and glacial runoff
on the circulation near Helheim Glacier, Nat. Geosci., 4, 322–327,
https://doi.org/10.1038/ngeo1109, 2011.
Straneo, F., Sutherland, D. A., Holland, D., Gladish, C., Hamilton, G. S.,
Johnson, H. L., Rignot, E., Xu, Y., and Koppes, M.: Characteristics of ocean
waters reaching Greenland's glaciers, Ann. Glaciol., 53, 202–210,
https://doi.org/10.3189/2012AoG60A059, 2012.
Straneo, F., Richards, C., and Holte, J.: Eastward and northward components of ocean current profiles from ADCP taken from small boat in Sarqardleq Fjord adjacent to a tidewater glacier, West Greenland from 2013-07-25 to 2013-07-27 (NCEI Accession 0177127), NOAA National Centers for Environmental Information, Dataset, available at: https://accession.nodc.noaa.gov/0177127 (last access: 12 June 2020), 2018.
Tedesco, M., Fettweis, X., Mote, T., Wahr, J., Alexander, P., Box, J. E., and Wouters, B.: Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data, The Cryosphere, 7, 615–630, https://doi.org/10.5194/tc-7-615-2013, 2013.
Vallot, D., Åström, J., Zwinger, T., Pettersson, R., Everett, A., Benn, D. I., Luckman, A., van Pelt, W. J. J., Nick, F., and Kohler, J.: Effects of undercutting and sliding on calving: a global approach applied to Kronebreen, Svalbard, The Cryosphere, 12, 609–625, https://doi.org/10.5194/tc-12-609-2018, 2018.
van den Broeke, M., Bamber, J., Ettema, J., Rignot, E., Schrama, E., van de
Berg, W. J., van Meijgaard, E., Velicogna, I., and Wouters, B.: Partitioning
Recent Greenland Mass Loss, Science, 326, 984–986,
https://doi.org/10.1126/science.1178176, 2009.
Wagner, T. J. W., Straneo, F., Richards, C. G., Slater, D. A., Stevens, L. A., Das, S. B., and Singh, H.: Large spatial variations in the flux balance along the front of a Greenland tidewater glacier, The Cryosphere, 13, 911–925, https://doi.org/10.5194/tc-13-911-2019, 2019.
Xu, Y., Rignot, E., Fenty, I., Menemenlis, D., and Flexas, M. M.: Subaqueous
melting of Store Glacier, west Greenland from three-dimensional,
high-resolution numerical modeling and ocean observations, Geophys. Res.
Lett., 40, 4648–4653, https://doi.org/10.1002/grl.50825, 2013.
Short summary
Buoyant plumes at tidewater glaciers result from localized subglacial discharges of surface melt. They promote glacier submarine melting and influence the delivery of nutrients to the fjord's surface waters. Combining plume theory with observations, we have found that increased fjord stratification, which is due to larger meltwater content, prevents the vertical growth of the plume and buffers submarine melting. We discuss the implications for nutrient fluxes, CO2 trapping and water export.
Buoyant plumes at tidewater glaciers result from localized subglacial discharges of surface...
