Posts Tagged «bioshow_joughin»

An article written by T. Moon, I. Joughin, B. Smith and I. Howat from Science/AAAS journal.

Alley, R. B., P. U. Clark, P. Huybrechts, and I. Joughin,’ Ice-sheet and sea-level changes’, Science, 310, 456-460, 2005.

Alley, R. B., M. Fahnestock, and I. Joughin, Climate change understanding glacier flow in changing times, Science, 322(5904), 1061-1062, 2008.

Alley, R. B., H. J. Horgan, I. Joughin, K. M. Cuffey, T. K. Dupont, B. R. Parizek, S. Anandakrishnan, and J. Bassis, A Simple Law for Ice-Shelf Calving, Science, 322(5906), 1344-1344,2008.

NASA climate scientists report that Antarctica has gained ice in the form of snow accumulation. This study was recently published in the Journal of Glaciology and reporters have sought comments from their peers at the Polar Science Center.

Results of a recent long-term and large-scale simulation of the collapse of the Western Antarctic Ice Sheet (WAIS) show that the destabilization of the entire ice sheet would be irreversible if current conditions don’t change by 2075.

Science Daily reports on a study recently published in Geophysical Research Letters where satellite measurements assessed glacier flow in the Antarctic Peninsula. PSC’s Ian Joughin was part of an international team of researchers, led by the UK Centre for Polar Observation and Modelling at the University of Leeds, and is one of the co-authors.

Bamber, J.L., R.J. Hardy, P. Huybrechts, and I. Joughin, A comparison of balance velocities, measured velocities and thermomechanically modelled velocities for the Greenland Ice Sheet, Ann. Glaciol., 30, 211-216, 2000.

Bamber, J.L., R.J. Hardy, and I. Joughin, An analysis of balance velocities over the Greenland ice sheet and comparison with synthetic aperture radar interferometry, J. Glaciol., 46(152), 67-74, 2000.

Bamber, J.L., D.G. Vaughan, and I. Joughin, Widespread complex plow in the interior of the Antarctic Ice Sheet, Science, 287(5456), 1248-1250, 2000.

Bougamont, M., S. Tulaczyk, and I. Joughin, Numerical investigations of the slow-down of Whillans Ice Stream, West Antarctica: is it shutting down like Ice Stream C?, in Annals of Glaciology, Vol 37, pp. 239-246, 2003.

Bougamont, M., S. Tulaczyk, and I. Joughin, Response of subglacial sediments to basal freeze- on – 2. Application in numerical modeling of the recent stoppage of Ice Stream C, West Antarctica, J. Geophys. Res.-Solid Earth, 108(B4), art. no.-2223, 2003.

Christianson, K., Bushuk, M., Dutrieux, P., Parizek, B.R., Joughin, I.R., Alley, R.B., Shean, D.E., Abrahamsen, E.P., Anandakrishnan, S., Heywood, K.J., Kim, T., Lee, S.H., Nicholls, K., Stanton, T., Truffer, M., Webber, B.G.M., Jenkings, A., Jacobs, S., Bindschadler, R., Holland, D.M., Sensitivity of Pine Island Glacier to observed ocean forcing: PIG response to ocean forcing, Geophys. Res. Lett., 43(20), 10,817-10,825, doi:10.1002/2016GL070500, 2016.

Christoffersen, P., R. I. Mugford, K. J. Heywood, I. Joughin, J. A. Dowdeswell, J. P. M. Syvitski, A. Luckman, and T. J. Benham, Warming of waters in an East Greenland fjord prior to glacier retreat: mechanisms and connection to large-scale atmospheric conditions, Cryosphere, 5(3), 701-714, 2011.

Colgan, W., H. Rajaram, R. Anderson, K. Steffen, T. Phillips, I. Joughin, H. J. Zwally, and W. Abdalati, The annual glaciohydrology cycle in the ablation zone of the Greenland ice sheet: Part 1. Hydrology model, Journal Of Glaciology, 57(204), 697-709, 2011.

Das, S. B., I. Joughin, M. Behn, M. King, I. M. Howat, D. Lizarralde, and M. Bahtia, Water- driven fracture propagation to the bed of the Greenland Ice Sheet during supraglacial lake drainage, Science, 320(5877), 778-781, 2008.

Fahnestock, M., W. Abdalati, I. Joughin, J. Brozena, and P. Gogineni, High geothermal heat row, basal melt, and the origin of rapid ice how in central Greenland, Science, 294(5550), 2338-2342, 2001.

Fahnestock, M.A., I. Joughin, T.A. Scambos, R. Kwok, W.B. Krabill, and S. Gogineni, Ice- stream-related patterns of ice flow in the interior of northeast Greenland, J. Geophys. Res.- Atmos., 106(D24), 34035-34045, 2001.

Fricker, H. A., T. Scambos, S. Carter, C. Davis, T. Haran, and I. Joughin, Synthesizing multiple remote-sensing techniques for subglacial hydrologic mapping: application to a lake system beneath MacAyeal Ice Stream, West Antarctica, J. Glaciol., 56(196), 187-199, 2010.

Gray, L., N. Short, R. Bindschadler, I. Joughin, L. Padman, P. Vornberger, and A. Khananian, RADARSAT interferometry for Antarctic grounding-zone mapping, Ann. of Glaciol., 34, 269-276, 2002.

Gray, L., I. Joughin, S. Tulaczyk, V.B. Spikes, R. Bindschadler, and K.C. Jezek,’ Evidence for subglacial water transport in the West Antarctic ice sheet through three-dimensional satellite radar interferometry’, Geophys. Res. Lett., 32, 10.1029/2004GL021387, 2005.

The Washington Post asks Ian Joughin about a recent study, in the journal Science Advances, using a GPS network which measures ice sheet mass loss in Greenland and re-evaluates previous studies.

UW Today reports on the results of a study recently published in The Cryosphere, involving PSC’s Ben Smith, Alex Huth, and Ian Joughin who teamed up with the University of Edinburgh and, using satellite data, identified a considerable drainage of interconnected lakes below West Antarctica’s Thwaites Glacier.

Hogg, A.E., A. Shepherd, S.L. Cornford, K.H. Briggs, N. Gourmelen, J. Graham, I. Joughin, J. Mouginot, T. Nagler, A.J. Payne, E. Rignot, J. Wuite. (2017), Increased ice flow in Western Palmer Land linked to ocean melting, Geophys. Res. Lett., 44, doi: 10.1002/2016GL072110

Howat, I. M., I. Joughin, S. Tulaczyk, and S. Gogineni,’ Rapid retreat and acceleration of Helheim Glacier, east Greenland’, Geophys. Res. Lett., 32, 2005.

Howat, I. M., I. Joughin, and T. A. Scambos,’ Rapid changes in ice discharge from Greenland outlet glaciers’, Science, 315, 1559-1561, 2007.

Howat, I. M., I. Joughin, M. Fahnestock, B. E. Smith, and T. A. Scambos, Synchronous retreat and acceleration of southeast Greenland outlet glaciers 2000-06: ice dynamics and coupling to climate, J. Glaciol., 54(187), 646-660, 2008.

Howat, I. M., Y. Ahn, I. Joughin, M. R. van den Broeke, J. T. M. Lenaerts, and B. Smith, Mass balance of Greenland’s three largest outlet glaciers, 2000-2010, Geophys. Res. Lett., 38, 2011.

Hulbe, C.L., I.R. Joughin, D.L. Morse, and R.A. Bindschadler, Tributaries to West Antarctic ice streams: Characteristics deduced from numerical modelling of ice flow, Ann. Glaciol., 31, 184-190, 2000.

Hulbe, C.L., W.L. Wang, I.R. Joughin, and M.J. Siegert, The role of lateral and vertical shear in tributary flow toward a West Antarctic ice stream, in Annals of Glaciology, Vol 36, pp. 244- 250, 2003.

Hulbe, C. L., Johnston, R., Joughin, I. & Scambos, T.,’ Marine ice modification of fringing ice shelf flow’, Arctic Antarctic And Alpine Research, 37, 323-330, 2005.

IMBIE [includes B. Smith & I. Joughin]. 2018. Mass balance of the Antarctic Ice Sheet from 1992 to 2017. Nature. 558:219–222.

Interferometric synthetic aperture radar (InSAR) is a widely used tool for measuring ice sheet velocity in the Polar Regions. However, the ionosphere is a prevalent source of noise in these data. Ian Joughin is a co-author of a study, published in the May 2018 issue of Remote Sensing Environment, where a split-spectrum technique was utilized, and its performance analyzed, for correcting ionospheric effects in InSAR-based ice velocity measurements in Greenland and Antarctica. Read on to learn if the technique effectively reduced noise level…

Airborne and satellite observations of West Antarctic topography and glacier flow speeds are combined with a computer model simulating ocean-driven glacier melting to show that the ice sheet’s collapse is already underway.

Joughin, I. & Bamber, J. L.,’ Thickening of the ice stream catchments feeding the Filchner-Ronne Ice Shelf, Antarctica’, Geophysical Research Letters, 32, 2005.

Joughin, I. & MacAyeal, D. R,’ Calving of large tabular icebergs from ice shelf rift systems’, Geophysical Research Letters, 32, 2005.

Joughin, I., et al.,’ Continued deceleration of Whillans Ice Stream, West Antarctica’, Geophys. Res. Lett., 32, 2005.

Joughin, I., D. E. Shean, B. E. Smith, and P. Dutrieux, Grounding line variability and subglacial lake drainage on Pine Island Glacier, Antarctica, Geophys. Res. Lett., 43(17), 9093–9102, doi:10.1002/2016GL070259, 2016

Joughin, I., S. Tulaczyk, M. Fahnestock, and R. Kwok, A mini-surge on the Ryder Glacier, Greenland, observed by satellite radar interferometry, Science, 274(5285), 228-230, 1996.

Joughin, I., R. Kwok, and M. Fahnestock, Estimation of ice-sheet motion using satellite radar interferometry: Method and error analysis with application to Humboldt Glacier, Greenland, J. Glaciol., 42(142), 564-575, 1996.

Joughin, I., D. Winebrenner, M. Fahnestock, R. Kwok, and W. Krabill, Measurement of ice- sheet topography using satellite radar interferometry, J. Glaciol., 42(140), 10-22, 1996.

Joughin, I., M. Fahnestock, S. Ekholm, and R. Kwok, Balance velocities of the Greenland ice sheet, Geophys. Res. Lett., 24(23), 3045-3048, 1997.

Joughin, I., M. Fahnestock, R. Kwok, P. Gogineni, and C. Allen, Ice flow of Humboldt, Petermann and Ryder Gletscher, northern Greenland, J. Glaciol., 45(150), 231-241, 1999.

Joughin, I., M. Fahnestock, D. MacAyeal, J.L. Bamber, and P. Gogineni, Observation and analysis of ice flow in the largest Greenland ice stream, J. Geophys. Res.-Atmos., 106(D24), 34021-34034, 2001.

Hulbe, C.L., W.L. Wang, I.R. Joughin, and M.J. Siegert, The role of lateral and vertical shear in tributary flow toward a West Antarctic ice stream, Ann. Glaciol., 36, 244-250, 2003.

Joughin, I., and S. Tulaczyk, Positive mass balance of the Ross Ice Streams, West Antarctica, Science, 295(5554), 476-480, 2002.

Joughin, I., Ice-sheet velocity mapping: A combined interferometric and speckle-tracking approach, Ann. Glaciol., 34, 195-201, 2002.

Joughin, I., and L. Padman, Melting and freezing beneath Filchner-Ronne Ice Shelf, Antarctica, Geophys. Res. Lett., 30(9), art. no.-1477, 2003.

Joughin, I., E. Rignot, C.E. Rosanova, B.K. Lucchitta, and J. Bohlander, Timing of recent accelerations of Pine Island Glacier, Antarctica, Geophys. Res. Lett., 30(13), art. no.-1706, 2003.

Joughin, I., S. Tulaczyk, and H.E. Engelhardt, Basal melt beneath Whillans Ice Stream and Ice Streams A and C, West Antarctica, Ann. Glaciol., 36, 257-262, 2003.