Ocean forced variability of Totten Glacier mass loss

  title={Ocean forced variability of Totten Glacier mass loss},
  author={Jason L Roberts and Benjamin Keith Galton-Fenzi and Fernando S. Paolo and Claire Donnelly and David E. Gwyther and Laurie Padman and Duncan Young and Roland Warner and Jamin Stevens Greenbaum and Helen Amanda Fricker and Antony J. Payne and Stephen L. Cornford and Anne M. Le Brocq and Tas D. van Ommen and Donald D. Blankenship and Martin J. Siegert},
  journal={Special Publications},
  pages={175 - 186}
Abstract A large volume of the East Antarctic Ice Sheet drains through the Totten Glacier (TG) and is thought to be a potential source of substantial global sea-level rise over the coming centuries. We show that the surface velocity and height of the floating part of the TG, which buttresses the grounded component, have varied substantially over two decades (1989–2011), with variations in surface height strongly anti-correlated with simulated basal melt rates (r = 0.70, p < 0.05). Coupled… Expand
Wind causes Totten Ice Shelf melt and acceleration
The results establish a link between the stability of Totten Glacier and upwelling near the East Antarctic coast, where surface winds are projected to intensify over the next century as a result of increasing atmospheric greenhouse gas concentrations. Expand
Imminent calving accelerated by increased instability of the Brunt Ice Shelf, in response to climate warming
  • Y. Cheng, Menglian Xia, G. Qiao, Da Lv, Yanjun Li, G. Hai
  • Geology
  • 2021
Abstract Ice shelves in the Southern Weddell Sea have large areas and volumes, and have previously been stable due to their setting in a region of cold near-surface and sub-surface ocean water. TheExpand
Modelled fracture and calving on the Totten Ice Shelf
Abstract. The Totten Ice Shelf (IS) has a large drainage basin, much of which is grounded below sea level, leaving the glacier vulnerable to retreat through the marine ice sheet instabilityExpand
Seasonal dynamics of Totten Ice Shelf controlled by sea ice buttressing
Abstract. Previous studies of Totten Ice Shelf have employed surface velocity measurements to estimate its mass balance and understand its sensitivities to interannual changes in climate forcing.Expand
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Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf
It is shown that low-frequency intrinsic ocean variability potentially accounts for a large fraction of the variability in the basal melting of TIS, and significantly affects modelled basal melting under the Totten Ice Shelf, with implications for the attribution of change. Expand
Totten Glacier subglacial hydrology determined from geophysics and modeling
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Basal melting of ice shelves is inherently difficult to quantify through direct observations, yet it is a critical factor controlling Antarctic mass balance and global sea‐level rise. While muchExpand
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High-resolution seismic data from the Sabrina Coast continental shelf, East Antarctica, elucidate the Cenozoic evolution of the East Antarctic Ice Sheet. Detailed seismic stratigraphic and faciesExpand


Observed thinning of Totten Glacier is linked to coastal polynya variability.
It is proposed that the observed increased thinning of Totten Glacier is due to enhanced basal melting caused by a decrease in cold polynya water reaching its cavity, and this hypothesis is supported with passive microwave data ofpolynya extent variability. Expand
Antarctic ice-sheet loss driven by basal melting of ice shelves
Satellite laser altimetry and modelling of the surface firn layer are used to reveal the circum-Antarctic pattern of ice-shelf thinning through increased basal melt, which implies that climate forcing through changing winds influences Antarctic ice-sheet mass balance, and hence global sea level, on annual to decadal timescales. Expand
Repeated large-scale retreat and advance of Totten Glacier indicated by inland bed erosion
Demarcate the marginal zones of two distinct quasi-stable EAIS configurations, corresponding to the ‘modern-scale’ ice sheet and the retreated ice sheet, suggesting shorter-lived exposure to eroding conditions during repeated retreat–advance events, which are probably driven by ocean-forced instabilities. Expand
Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets
Many glaciers along the margins of the Greenland and Antarctic ice sheets are accelerating and, for this reason, contribute increasingly to global sea-level rise. Globally, ice losses contribute ∼1.8Expand
Variability of basal melt beneath the Pine Island Glacier ice shelf, West Antarctica
Abstract Observations from satellite and airborne platforms are combined with model calculations to infer the nature and efficiency of basal melting of the Pine Island Glacier ice shelf, WestExpand
Modeling the basal melting and marine ice accretion of the Amery Ice Shelf
The basal mass balance of the Amery Ice Shelf (AIS) in East Antarctica is investigated using a numerical ocean model. The main improvements of this model over previous studies are the inclusion ofExpand
Ice flow dynamics and mass loss of Totten Glacier, East Antarctica, from 1989 to 2015
Totten Glacier has the largest ice discharge in East Antarctica and a basin grounded mostly below sea level. Satellite altimetry data have revealed ice thinning in areas of fast flow. Here we presentExpand
Century-scale simulations of the response of the West Antarctic Ice Sheet to a warming climate
We use the BISICLES adaptive mesh ice sheet model to carry out one, two, and three century simulations of the fast-flowing ice streams of the West Antarctic Ice Sheet, deploying sub-kilometerExpand
Antarctic subglacial conditions inferred from a hybrid ice sheet/ice stream model
Abstract Subglacial conditions of large polar ice sheets remain poorly understood, despite recent advances in satellite observation. Major uncertainties related to basal conditions, such as theExpand
Recent Sea-Level Contributions of the Antarctic and Greenland Ice Sheets
In both continents, there are suspected triggers for the accelerated ice discharge—surface and ocean warming, respectively—and, over the course of the 21st century, these processes could rapidly counteract the snowfall gains predicted by present coupled climate models. Expand