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Brief communication: "The 2013 erebus glacier tongue calving event"

Cryosphere (2013) 7(5) 1333-1337
DOI: 10.5194/tc-7-1333-2013
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Abstract

The Erebus Glacier Tongue, a small floating glacier in southern McMurdo Sound, is one of the best-studied ice tongues in Antarctica. Despite this, its calving on the 27 February 2013 (UTC) was around 10 yr earlier than previously predicted. The calving was likely a result of ocean currents and the absence of fast ice. The subsequent trajectory of the newly created iceberg supports previous descriptions of the surface ocean circulation in southern McMurdo Sound. © Author(s) 2013.

Figures

  • Fig. 1. ASTER images from (a) year day 12 (12 January 2013), (b) year day 58 (27 February 2013) showing tip moving south and speculated current shear described in the text. Landsat 4 TM images from 1989 showing (c) year day 29 (29 January 1989) and (d) year day 349 (14 December 1992). The Erebus Glacier Tongue (EGT), Tent Island (TI), Big Razorback Island (BRI) and Hut Peninsula (HP) are marked in (a). (e) Shows the wind velocity (direction is that of wind origin) recorded at Cape Royds, 20 km north of the EGT.
  • Fig. 2. ASTER images of EGT (a) before and (b) after the 2013 calving (zoomed from Fig. 1a, b), and (c) tip space-time diagram. The longitudes of Tent Island and the coast are marked with dashed lines. The indicated tip velocities are the slope of the dashed lines. Squares show longitude at calving (hollow square indicates the date is poorly constrained) whilst circles are tip positions at other times. The 1911/1912 data come from Taylor (1922), the 1940s estimates are from Holdsworth (1982), the 1950–1990 data from a mix of USGS aerial photographs, DeLisle et al. (1989) and vessel observations (Jacobs et al., 1981). The more recent data come from ASTER satellite images.
  • Fig. 3. EGT tip iceberg trajectory built from a sequence of 38 MODIS and 2 ASTER images from year day 57 (26 February 203) through to year day 80 (21 March 2013). Estimated time in hours since detachment is indicated at each location. The width of the arrow is indicative of the speed. Note the 180°rotation when passing McMurdo Station (H+ 10 to H+ 28).

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APA

Stevens, C. L., Sirguey, P., Leonard, G. H., & Haskell, T. G. (2013). Brief communication: “The 2013 erebus glacier tongue calving event.” Cryosphere, 7(5), 1333–1337. https://doi.org/10.5194/tc-7-1333-2013

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