Search Results - "JOUGHIN, I"

21st-Century Evolution of Greenland Outlet Glacier Velocities by Moon, T., Joughin, I., Smith, B., Howat, I.

“…Earlier observations on several of Greenland's outlet glaciers, starting near the turn of the 21st century, indicated rapid (annual-scale) and large (> 100%)…”
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Brief Communication: Further summer speedup of Jakobshavn Isbræ by Joughin, I., Smith, B. E., Shean, D. E., Floricioiu, D.

“…We have extended the record of flow speed on Jakobshavn Isbræ through the summer of 2013. These new data reveal large seasonal speedups, 30 to 50% greater than…”
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Airborne-radar and ice-core observations of annual snow accumulation over Thwaites Glacier, West Antarctica confirm the spatiotemporal variability of global and regional atmospheric models by Medley, B., Joughin, I., Das, S. B., Steig, E. J., Conway, H., Gogineni, S., Criscitiello, A. S., McConnell, J. R., Smith, B. E., van den Broeke, M. R., Lenaerts, J. T. M., Bromwich, D. H., Nicolas, J. P.

“…We use an airborne‐radar method, verified with ice‐core accumulation records, to determine the spatiotemporal variations of snow accumulation over Thwaites…”
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Seasonal speedup of a Greenland marine-terminating outlet glacier forced by surface melt-induced changes in subglacial hydrology by Sole, A. J., Mair, D. W. F., Nienow, P. W., Bartholomew, I. D., King, M. A., Burke, M. J., Joughin, I.

“…We present subdaily ice flow measurements at four GPS sites between 36 and 72 km from the margin of a marine‐terminating Greenland outlet glacier spanning the…”
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Rapid retreat and acceleration of Helheim Glacier, east Greenland by Howat, I. M., Joughin, I., Tulaczyk, S., Gogineni, S.

“…A significant amount of the measured coastal thinning of the Greenland ice sheet may be due to recent acceleration of outlet glaciers. Using remote sensing, we…”
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Seasonal and interannual variabilities in terminus position, glacier velocity, and surface elevation at Helheim and Kangerlussuaq Glaciers from 2008 to 2016 by Kehrl, L. M., Joughin, I., Shean, D. E., Floricioiu, D., Krieger, L.

“…The dynamic response of Greenland tidewater glaciers to oceanic and atmospheric change has varied both spatially and temporally. While some of this variability…”
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Committed retreat of Smith, Pope, and Kohler Glaciers over the next 30 years inferred by transient model calibration by Goldberg, D. N, Heimbach, P, Joughin, I, Smith, B

“…A glacial flow model of Smith, Pope and Kohler Glaciers is calibrated by means of control methods against time varying, annually resolved observations of ice…”
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Pine Island glacier ice shelf melt distributed at kilometre scales by Dutrieux, P, Vaughan, D. G, Corr, H. F. J, Jenkins, A, Holland, P. R, Joughin, I, Fleming, A. H

“…By thinning and accelerating, West Antarctic ice streams are contributing about 10% of the observed global sea level rise. Much of this ice loss is from Pine…”
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Constraints on the lake volume required for hydro-fracture through ice sheets by Krawczynski, M. J., Behn, M. D., Das, S. B., Joughin, I.

“…Water‐filled cracks are an effective mechanism to drive hydro‐fractures through thick ice sheets. Crack geometry is therefore critical in assessing whether a…”
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Constraining the recent mass balance of Pine Island and Thwaites glaciers, West Antarctica, with airborne observations of snow accumulation by Medley, B, Joughin, I, Smith, B. E, Das, S. B, Steig, E. J, Conway, H, Gogineni, S, Lewis, C, Criscitiello, A. S, McConnell, J. R, van den Broeke, M. R, Lenaerts, J. T. M, Bromwich, D. H, Nicolas, J. P, Leuschen, C

“…In Antarctica, uncertainties in mass input and output translate directly into uncertainty in glacier mass balance and thus in sea level impact. While remotely…”
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Kinematic first-order calving law implies potential for abrupt ice-shelf retreat by Levermann, A, Albrecht, T, Winkelmann, R, Martin, M. A, Haseloff, M, Joughin, I

“…Recently observed large-scale disintegration of Antarctic ice shelves has moved their fronts closer towards grounded ice. In response, ice-sheet discharge into…”
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Influence of ice-sheet geometry and supraglacial lakes on seasonal ice-flow variability by Joughin, I, Das, S. B, Flowers, G. E, Behn, M. D, Alley, R. B, King, M. A, Smith, B. E, Bamber, J. L, van den Broeke, M. R, van Angelen, J. H

“…Supraglacial lakes play an important role in establishing hydrological connections that allow lubricating seasonal meltwater to reach the base of the Greenland…”
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Warming of waters in an East Greenland fjord prior to glacier retreat: mechanisms and connection to large-scale atmospheric conditions by Christoffersen, P., Mugford, R. I., Heywood, K. J., Joughin, I., Dowdeswell, J. A., Syvitski, J. P. M., Luckman, A., Benham, T. J.

“…Hydrographic data acquired in Kangerdlugssuaq Fjord and adjacent seas in 1993 and 2004 are used together with reanalysis from the NEMO ocean modelling…”
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Spatiotemporal interpolation of elevation changes derived from satellite altimetry for Jakobshavn Isbræ, Greenland by Hurkmans, R. T. W. L., Bamber, J. L., Sørensen, L. S., Joughin, I. R., Davis, C. H., Krabill, W. B.

“…Estimation of ice sheet mass balance from satellite altimetry requires interpolation of point‐scale elevation change (dH/dt) data over the area of interest…”
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Time-evolving mass loss of the Greenland Ice Sheet from satellite altimetry by Hurkmans, R. T. W. L, Bamber, J. L, Davis, C. H, Joughin, I. R, Khvorostovsky, K. S, Smith, B. S, Schoen, N

“…Mass changes of the Greenland Ice Sheet may be estimated by the input–output method (IOM), satellite gravimetry, or via surface elevation change rates (dH/dt)…”
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High Geothermal Heat Flow, Basal Melt, and the Origin of Rapid Ice Flow in Central Greenland by Fahnestock, Mark, Abdalati, Waleed, Joughin, Ian, Brozena, John, Gogineni, Prasad

“…Age-depth relations from internal layering reveal a large region of rapid basal melting in Greenland. Melt is localized at the onset of rapid ice flow in the…”
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Rheology of the Ronne Ice Shelf, Antarctica, inferred from satellite radar interferometry data using an inverse control method by Larour, E., Rignot, E., Joughin, I., Aubry, D.

“…The Antarctic Ice Sheet is surrounded by large floating ice shelves that spread under their own weight into the ocean. Ice shelf rigidity depends on ice…”
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Widespread Complex Flow in the Interior of the Antarctic Ice Sheet by Bamber, Jonathan L., Vaughan, David G., Joughin, Ian

“…It has been suggested that as much as 90% of the discharge from the Antarctic Ice Sheet is drained through a small number of fast-moving ice streams and outlet…”
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Continued deceleration of Whillans Ice Stream, West Antarctica by Joughin, I., Bindschadler, R. A., King, M. A., Voigt, D., Alley, R. B., Anandakrishnan, S., Horgan, H., Peters, L., Winberry, P., Das, S. B., Catania, G.

“…Earlier observations indicated that Whillans Ice Stream slowed from 1973 to 1997. We collected new GPS observations of the ice stream's speed in 2003 and 2004…”
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Subglacial conditions during and after stoppage of an Antarctic Ice Stream: Is reactivation imminent? by Vogel, S. W., Tulaczyk, S., Kamb, B., Engelhardt, H., Carsey, F. D., Behar, A. E., Lane, A. L., Joughin, I.

“…Borehole observations from the base of the West‐Antarctic Ice Sheet (WAIS) reveal the presence of a 10 to 15 m thick accretionary basal ice layer in the…”
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