Continued deceleration of Whillans ice stream, West Antarctica

• Published in: Geophysical Research Letters
• Main Authors: Joughin, I, Bindschadler, RA, King, MA, Voigt, D, Alley, RB, Anandakrishnan, S, Horgan, H, Peters, L, Winberry, P, Das, SB, Catania, G
• Format: Article in Journal/Newspaper
• Language: English
• Published: Amer Geophysical Union 2005
• Subjects: Earth Sciences; Physical Geography and Environmental Geoscience; Physical Geography and Environmental Geoscience not elsewhere classified; West Antarctica; Whillans; Whillans Ice Stream; Antarc*; Antarctica
• Online Access: https://doi.org/10.1029/2005GL024319; http://ecite.utas.edu.au/81813

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. These data show that the ice stream is continuing to decelerate at rates of about 0.61%/yr 2 , with faster rates near the grounding line. Our data also indicate that the deceleration extends over the full width of the ice plain. Extrapolation of the deceleration trend suggests the ice stream could stagnate sometime between the middle of the 21st and 22nd Centuries.