Articles | Volume 14, issue 6
The Cryosphere, 14, 1951–1969, 2020
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.
The Cryosphere, 14, 1951–1969, 2020
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
Surface emergence of glacial plumes determined by fjord stratification
Eva De Andrés et al.
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Ana Moreno, Miguel Bartolomé, Juan Ignacio López-Moreno, Jorge Pey, Juan Pablo Corella, Jordi García-Orellana, Carlos Sancho, María Leunda, Graciela Gil-Romera, Penélope González-Sampériz, Carlos Pérez-Mejías, Francisco Navarro, Jaime Otero-García, Javier Lapazaran, Esteban Alonso-González, Cristina Cid, Jerónimo López-Martínez, Belén Oliva-Urcia, Sérgio Henrique Faria, María José Sierra, Rocío Millán, Xavier Querol, Andrés Alastuey, and José M. García-Ruíz
The Cryosphere, 15, 1157–1172, https://doi.org/10.5194/tc-15-1157-2021, https://doi.org/10.5194/tc-15-1157-2021, 2021
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Our study of the chronological sequence of Monte Perdido Glacier in the Central Pyrenees (Spain) reveals that, although the intense warming associated with the Roman period or Medieval Climate Anomaly produced important ice mass losses, it was insufficient to make this glacier disappear. By contrast, recent global warming has melted away almost 600 years of ice accumulated since the Little Ice Age, jeopardising the survival of this and other southern European glaciers over the next few decades.
Ethan Welty, Michael Zemp, Francisco Navarro, Matthias Huss, Johannes J. Fürst, Isabelle Gärtner-Roer, Johannes Landmann, Horst Machguth, Kathrin Naegeli, Liss M. Andreassen, Daniel Farinotti, Huilin Li, and GlaThiDa Contributors
Earth Syst. Sci. Data, 12, 3039–3055, https://doi.org/10.5194/essd-12-3039-2020, https://doi.org/10.5194/essd-12-3039-2020, 2020
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Knowing the thickness of glacier ice is critical for predicting the rate of glacier loss and the myriad downstream impacts. To facilitate forecasts of future change, we have added 3 million measurements to our worldwide database of glacier thickness: 14 % of global glacier area is now within 1 km of a thickness measurement (up from 6 %). To make it easier to update and monitor the quality of our database, we have used automated tools to check and track changes to the data over time.
Nicolas C. Jourdain, Xylar Asay-Davis, Tore Hattermann, Fiammetta Straneo, Hélène Seroussi, Christopher M. Little, and Sophie Nowicki
The Cryosphere, 14, 3111–3134, https://doi.org/10.5194/tc-14-3111-2020, https://doi.org/10.5194/tc-14-3111-2020, 2020
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To predict the future Antarctic contribution to sea level rise, we need to use ice sheet models. The Ice Sheet Model Intercomparison Project for AR6 (ISMIP6) builds an ensemble of ice sheet projections constrained by atmosphere and ocean projections from the 6th Coupled Model Intercomparison Project (CMIP6). In this work, we present and assess a method to derive ice shelf basal melting in ISMIP6 from the CMIP6 ocean outputs, and we give examples of projected melt rates.
Heiko Goelzer, Sophie Nowicki, Anthony Payne, Eric Larour, Helene Seroussi, William H. Lipscomb, Jonathan Gregory, Ayako Abe-Ouchi, Andrew Shepherd, Erika Simon, Cécile Agosta, Patrick Alexander, Andy Aschwanden, Alice Barthel, Reinhard Calov, Christopher Chambers, Youngmin Choi, Joshua Cuzzone, Christophe Dumas, Tamsin Edwards, Denis Felikson, Xavier Fettweis, Nicholas R. Golledge, Ralf Greve, Angelika Humbert, Philippe Huybrechts, Sebastien Le clec'h, Victoria Lee, Gunter Leguy, Chris Little, Daniel P. Lowry, Mathieu Morlighem, Isabel Nias, Aurelien Quiquet, Martin Rückamp, Nicole-Jeanne Schlegel, Donald A. Slater, Robin S. Smith, Fiamma Straneo, Lev Tarasov, Roderik van de Wal, and Michiel van den Broeke
The Cryosphere, 14, 3071–3096, https://doi.org/10.5194/tc-14-3071-2020, https://doi.org/10.5194/tc-14-3071-2020, 2020
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In this paper we use a large ensemble of Greenland ice sheet models forced by six different global climate models to project ice sheet changes and sea-level rise contributions over the 21st century.
The results for two different greenhouse gas concentration scenarios indicate that the Greenland ice sheet will continue to lose mass until 2100, with contributions to sea-level rise of 90 ± 50 mm and 32 ± 17 mm for the high (RCP8.5) and low (RCP2.6) scenario, respectively.
Hélène Seroussi, Sophie Nowicki, Antony J. Payne, Heiko Goelzer, William H. Lipscomb, Ayako Abe-Ouchi, Cécile Agosta, Torsten Albrecht, Xylar Asay-Davis, Alice Barthel, Reinhard Calov, Richard Cullather, Christophe Dumas, Benjamin K. Galton-Fenzi, Rupert Gladstone, Nicholas R. Golledge, Jonathan M. Gregory, Ralf Greve, Tore Hattermann, Matthew J. Hoffman, Angelika Humbert, Philippe Huybrechts, Nicolas C. Jourdain, Thomas Kleiner, Eric Larour, Gunter R. Leguy, Daniel P. Lowry, Chistopher M. Little, Mathieu Morlighem, Frank Pattyn, Tyler Pelle, Stephen F. Price, Aurélien Quiquet, Ronja Reese, Nicole-Jeanne Schlegel, Andrew Shepherd, Erika Simon, Robin S. Smith, Fiammetta Straneo, Sainan Sun, Luke D. Trusel, Jonas Van Breedam, Roderik S. W. van de Wal, Ricarda Winkelmann, Chen Zhao, Tong Zhang, and Thomas Zwinger
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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The Antarctic ice sheet has been losing mass over at least the past 3 decades in response to changes in atmospheric and oceanic conditions. This study presents an ensemble of model simulations of the Antarctic evolution over the 2015–2100 period based on various ice sheet models, climate forcings and emission scenarios. Results suggest that the West Antarctic ice sheet will continue losing a large amount of ice, while the East Antarctic ice sheet could experience increased snow accumulation.
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
Earth Syst. Sci. Data, 12, 2013–2041, https://doi.org/10.5194/essd-12-2013-2020, https://doi.org/10.5194/essd-12-2013-2020, 2020
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Understanding how much and where the heat is distributed in the Earth system is fundamental to understanding how this affects warming oceans, atmosphere and land, rising temperatures and sea level, and loss of grounded and floating ice, which are fundamental concerns for society. This study is a Global Climate Observing System (GCOS) concerted international effort to obtain the Earth heat inventory over the period 1960–2018.
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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This paper describes the experimental protocol for ice sheet models taking part in the Ice Sheet Model Intercomparion Project for CMIP6 (ISMIP6) and presents an overview of the atmospheric and oceanic datasets to be used for the simulations. The ISMIP6 framework allows for exploring the uncertainty in 21st century sea level change from the Greenland and Antarctic ice sheets.
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.
Samuel J. Cook, Poul Christoffersen, Joe Todd, Donald Slater, and Nolwenn Chauché
The Cryosphere, 14, 905–924, https://doi.org/10.5194/tc-14-905-2020, https://doi.org/10.5194/tc-14-905-2020, 2020
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This paper models how water flows beneath a large Greenlandic glacier and how the structure of the drainage system it flows in changes over time. We also look at how this affects melting driven by freshwater plumes at the glacier front, as well as the implications for glacier flow and sea-level rise. We find an active drainage system and plumes exist year round, contradicting previous assumptions and suggesting more melting may not slow the glacier down, unlike at other sites in Greenland.
Alice Barthel, Cécile Agosta, Christopher M. Little, Tore Hattermann, Nicolas C. Jourdain, Heiko Goelzer, Sophie Nowicki, Helene Seroussi, Fiammetta Straneo, and Thomas J. Bracegirdle
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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We compare existing coupled climate models to select a total of six models to provide forcing to the Greenland and Antarctic ice sheet simulations of the Ice Sheet Model Intercomparison Project (ISMIP6). We select models based on (i) their representation of current climate near Antarctica and Greenland relative to observations and (ii) their ability to sample a diversity of projected atmosphere and ocean changes over the 21st century.
Donald A. Slater, Fiamma Straneo, Denis Felikson, Christopher M. Little, Heiko Goelzer, Xavier Fettweis, and James Holte
The Cryosphere, 13, 2489–2509, https://doi.org/10.5194/tc-13-2489-2019, https://doi.org/10.5194/tc-13-2489-2019, 2019
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The ocean's influence on the retreat of Greenland's tidewater glaciers is a key factor determining future sea level. By considering observations of ~200 glaciers from 1960, we find a significant relationship between retreat and melting in the ocean. Projected forwards, this relationship estimates the future evolution of Greenland's tidewater glaciers and provides a practical and empirically validated way of representing ice–ocean interaction in large-scale models used to estimate sea level rise.
Philipp Anhaus, Lars H. Smedsrud, Marius Årthun, and Fiammetta Straneo
The Cryosphere Discuss., https://doi.org/10.5194/tc-2019-35, https://doi.org/10.5194/tc-2019-35, 2019
Revised manuscript not accepted
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Atlantic Water flows towards the Arctic and under floating glaciers on Greenland. Observations in a rift on the 79 North Glacier show presence of such water with temperature of 1 °C at 600 m. We simulate how this warm water melts the floating ice. Melt rates are largest where the glacier starts floating, are smaller where the water rises, and increase linearly with rising ocean temperature. Our results improve the understanding of ocean processes driving melting of floating glaciers.
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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This study shows how complex and varied the processes are that determine the frontal position of tidewater glaciers. Rather than uniform melt or calving rates, a single (medium-sized) glacier can feature regions that retreat almost exclusively due to melting and other regions that retreat only due to calving. This has far-reaching consequences for our understanding of how glaciers retreat or advance.
Marilena Oltmanns, Fiammetta Straneo, and Marco Tedesco
The Cryosphere, 13, 815–825, https://doi.org/10.5194/tc-13-815-2019, https://doi.org/10.5194/tc-13-815-2019, 2019
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By combining reanalysis, weather station and satellite data, we show that increases in surface melt over Greenland are initiated by large-scale precipitation events year-round. Estimates from a regional climate model suggest that the initiated melting more than doubled between 1988 and 2012, amounting to ~28 % of the overall melt and revealing that, despite the involved mass gain, precipitation events are contributing to the ice sheet's decline.
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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We combine a synthesis of 22 ice core records and a model of soluble impurity transport to investigate the enigmatic, post-depositional migration of methanesulfonic acid in polar ice. Our findings suggest that migration may be universal across coastal regions of Greenland and Antarctica, though it is mitigated at sites with higher accumulation and (or) lower impurity content. Records exhibiting severe migration may still be useful for inferring decadal and lower-frequency climate variability.
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
The Cryosphere, 11, 2003–2032, https://doi.org/10.5194/tc-11-2003-2017, https://doi.org/10.5194/tc-11-2003-2017, 2017
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For the large majority of glaciers and ice caps, there is no information on the thickness of the ice cover. Any attempt to predict glacier demise under climatic warming and to estimate the future contribution to sea-level rise is limited as long as the glacier thickness is not well constrained. Here, we present a two-step mass-conservation approach for mapping ice thickness. Measurements are naturally reproduced. The reliability is readily assessible from a complementary map of error estimates.
Ricardo Rodríguez Cielos, Julián Aguirre de Mata, Andrés Díez Galilea, Marina Álvarez Alonso, Pedro Rodríguez Cielos, and Francisco Navarro Valero
Earth Syst. Sci. Data, 8, 341–353, https://doi.org/10.5194/essd-8-341-2016, https://doi.org/10.5194/essd-8-341-2016, 2016
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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
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
Ryan Schubert, Andrew F. Thompson, Kevin Speer, Lena Schulze Chretien, and Yana Bebieva
The Cryosphere Discuss., https://doi.org/10.5194/tc-2021-43, https://doi.org/10.5194/tc-2021-43, 2021
Revised manuscript accepted for TC
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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.
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.
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.
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.
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.
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.
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...
