Skip to main content Accessibility help
×
Home

Ice flow velocities over Vostok Subglacial Lake, East Antarctica, determined by 10 years of GNSS observations

  • A. Richter (a1), D.V. Fedorov (a2), M. Fritsche (a1), S.V. Popov (a3), V.Ya. Lipenkov (a4), A.A. Ekaykin (a4), V.V. Lukin (a4), A.Yu. Matveev (a2), V.P. Grebnev (a2), R. Rosenau (a1) and R. Dietrich (a1)...

Abstract

Repeated Global Navigation Satellite Systems (GNSS) observations were carried out at 50 surface markers in the Vostok Subglacial Lake (East Antarctica) region between 2001 and 2011. The horizontal ice flow velocity vectors were derived with accuracies of 1 cm a−1 and 0.5°, representing the first reliable information on ice flow kinematics in the northern part of the lake. Within the lake area, ice flow velocities do not exceed 2 m a−1. The ice flow azimuth is southeast in the southern part of the lake and turns gradually to east-northeast in the northern part. In the northern part, as the ice flow enters the lake at the western shore, the velocity decreases towards the central lake axis, then increases slightly past the central axis. In the southern part, a continued acceleration is observed from the central lake axis across the downstream grounding line. Based on the observed flow velocity vectors and ice thickness data, mean surface accumulation rates are inferred for four surface segments between Ridge B and Vostok Subglacial Lake and show a steady increase towards the north.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Ice flow velocities over Vostok Subglacial Lake, East Antarctica, determined by 10 years of GNSS observations
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Ice flow velocities over Vostok Subglacial Lake, East Antarctica, determined by 10 years of GNSS observations
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Ice flow velocities over Vostok Subglacial Lake, East Antarctica, determined by 10 years of GNSS observations
      Available formats
      ×

Copyright

References

Hide All
Altamimi, Z, Collilieux, X and Métivier, L (2011) ITRF2008: an improved solution of the international terrestrial reference frame. J. Geod., 85(8), 457473 (doi: 10.1007/s00190-011-0444-4)
Arthern, RJ, Winebrenner, DP and Vaughan, DG (2006) Antarctic snow accumulation mapped using polarization of 4.3 cm wavelength microwave emission. J. Geophys. Res., 111(D6), D06107 (doi: 10.1029/2004JD005667)
Bamber, JL, Gomez-Dans, JL and Griggs, JA (2009) A new 1 km digital elevation model of the Antarctic derived from combined satellite radar and laser data – Part 1: data and methods. Cryosphere, 3(1), 101111 (doi: 10.5194/tc-3-101-2009)
Bell, RE, Studinger, M, Tikku, AA, Clarke, GKC, Gutner, MM and Meertens, C (2002) Origin and fate of Lake Vostok water frozen to the base of the East Antarctic ice sheet. Nature, 416(6878), 307310 (doi: 10.1038/416307a)
Cuffey, KM and Paterson, WSB (2010) The physics of glaciers, 4th edn. Butterworth-Heinemann, Oxford
Dach, R, Hugentobler, U, Fridez, P and Meindl, M eds (2007) Bernese GPS Software, Version 5.0. Astronomical Institute, University of Bern, Bern
Ekaykin, AA, Lipenkov, VY, Kuzmina, IN, Petit, JR, Masson-Delmotte, V and Johnsen, SJ (2004) The changes in isotope composition and accumulation of snow at Vostok station, East Antarctica, over the past 200 years. Ann. Glaciol., 39, 569575 (doi: 10.3189/172756404781814348)
Ewert, H, Popov, SV, Richter, A, Schwabe, J, Scheinert, M and Dietrich, R (2012) Precise analysis of ICESat altimetry data and assessment of the hydrostatic equilibrium for subglacial Lake Vostok, East Antarctica. Geophys. J. Int., 191(2), 557568 (doi: 10.1111/j.1365-246X.2012.05649.x)
Filina, IY, Blankenship, DD, Thoma, M, Lukin, VV, Masolov, VN and Sen, MK (2008) New 3D bathymetry and sediment distribution in Lake Vostok: implication for pre-glacial origin and numerical modeling of the internal processes within the lake. Earth Planet. Sci. Lett., 276(1–2), 106114 (doi: 10.1016/j.epsl.2008.09.012)
Goldstein, RM, Engelhardt, H, Kamb, B and Frolich, RM (1993) Satellite radar interferometry for monitoring ice sheet motion: applicxation to an Antarctic ice stream. Science, 262(5139), 15251530 (doi: 10.1126/science.262.5139.1525)
Kapitsa, AP, Ridley, JK, Robin, GD, Siegert, MJ and Zotikov, I (1996) A large deep freshwater lake beneath the ice of central East Antarctica. Nature, 381(6584), 684686 (doi: 10.1038/381684a0)
Kwok, R, Siegert, MJ and Carsey, FD (2000) Ice motion over Lake Vostok, Antarctica: constraints on inferences regarding the accreted ice. J. Glaciol., 46(155), 689694 (doi: 10.3189/172756500781832710)
Leonard, K, Bell, RE, Studinger, M and Tremblay, B (2004) Anomalous accumulation rates in the Vostok ice core resulting from ice flow over Lake Vostok. Geophys. Res. Lett., 31(2), L24401 (doi: 10.1029/2004GL021102)
Lipenkov, VY, Salamatin, AN and Duval, P (1997) Bubbly-ice densification in ice sheets: II. Applications. J. Glaciol., 43(145), 397407
Lipenkov, VY, Yekaykin, AA, Barkov, NI and Purshe, M (1998) O svyazi plotnosti poverkhnostnogo sloya snega v Antarktide so skorost’yu vetra [On the relationship between surface snow density in Antarctica with wind velocity]. Mater. Glyatsiol. Issled. 85, 148158 [in Russian]
VYa, Lipenkov, Barkov, NI and Salamatin, AN (2000) Istoriya klimata i oledeneniya Antarktidy po rezul’tatam izucheniya ledanogo kerna so stantsii Vostok [The history of climate and glaciation of Antarctica from results of the ice core study at Vostok Station]. Probl. Arkt. Antarkt., 72, 197236 [in Russian with English summary]
Parrenin, F, Rémy, F, Ritz, C, Siegert, MJ and Jouzel, J (2004) New modeling of the Vostok ice flow line and implication for the glaciological chronology of the Vostok ice core. J. Geophys. Res., 109(D20), D20102 (doi: 10.1029/2004JD004561)
Pattyn, F (2003) A new three-dimensional higher-order thermomechanical ice-sheet model: basic sensitivity, ice stream development, and ice flow across subglacial lakes. J. Geophys. Res., 108(B8), 2382 (doi: 10.1029/2002JB002329)
Pattyn, F, De Smedt, B and Souchez, R (2004) Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: a model study. J. Glaciol., 50(171), 583589 (doi: 10.3189/172756504781829765)
Petit, JR and 18 others (1999) Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica. Nature, 399(6735), 429436 (doi: 10.1038/20859)
Popov, SV and Chernoglazov, YB (2011) Podlednikovoe ozero Vostok, Vostochnaya Antaktida: beregovaya liniya i okruzhayushchie vodoemy [Vostok Subglacial Lake, East Antarctica: lake shoreline and subglacial water caves]. Led i Sneg, 1(113), 1224 [in Russian]
Popov, SV, Kharitonov, VV and Chernoglazov, YuB (2004) Plotnost’i udel’naya akkumulyatsiya snezhnogo pokrova yuzhnoy chasti podlednikovogo ozera Vostok (Vostochnaya Antarktida) [Density and specific snow accumulation in the southern part of Vostok Subglacial Lake (Eastern Antarctica)]. Mater. Glyatsiol. Issled. 96, 201206 [in Russian]
Popov, SV, VYa, Lipenkov and Enalieva, VV (2007) Vnutriledikovye izohronnye poverhnosti v rayone ozera Vostok, Vostochnaya Antarktida [Interglacier isochronous surfaces in the Lake Vostok area, East Antarctica]. Probl. Arkt. Antarkt., 76, 8995 [in Russian]
Popov, SV, Masolov, VN and Lukin, VV (2011) Ozero Vostok, Vostochnaya Antarktida: moshchnost’ lednika, glubina ozera, podlednyy i korennoy rel’ef [Vostok Subglacial Lake, East Antarctica, ice thickness, lake depth, bedrock and ice base]. Led i Sneg, 1(113), 2535 [in Russian]
Rebischung, P, Griffiths, J, Ray, J, Schmid, R, Collilieux, X and Garayt, B (2011) IGS08: the IGS realization of ITRF2008. GPS Solutions, 16(4), 483494 (doi: 10.1007/s10291-011-0248-2)
Rémy, F, Shaeffer, P and Legrésy, B (1999) Ice flow physical processes derived from ERS-1 high-resolution map of Antarctica and Greenland ice sheet. Geophys. J. Int., 139(3), 645656 (doi: 10.1046/j.1365-246x.1999.00964.x)
Richter, A and 9 others (2008) Observational evidence on the stability of the hydro-glaciological regime of subglacial Lake Vostok. Geophys. Res. Lett., 35(11), L11502 (doi: 10.1029/2008GL033397)
Ross, N and 8 others (2011) Holocene stability of the Amundsen– Weddell ice divide, West Antarctica. Geology, 39(10), 935938 (doi: 10.1130/G31920.1)
Rülke, A, Dietrich, R, Fritsche, M, Rotacher, M and Steigenberger, P (2008) Realization of the Terrestrial Reference System by a reprocessed global GPS network. J. Geophys. Res., 113(B8), B08403 (doi: 10.1029/2007JB005231)
Salamatin, AN, Tsyganova, EA, Popov, SV and Lipenkov, VY (2009) Ice flow line modeling in ice core data interpretation: Vostok Station (East Antarctica). In Hondoh, T ed. Physics of ice core records, Volume 2. (Supplement Issue of Low Temperature Science 68) Hokkaido University Press, Sapporo, 167194
Scambos, TA, Dutkiewicz, MJ, Wilson, JC and Bindschadler, RA (1992) Application of image cross-correlation to the measurement of glacier velocity using satellite image data. Remote Sens. Environ., 42(3), 177186 (doi: 10.1016/0034-4257(92)90101-O)
Siegert, MJ, Kennicutt, MCI and Bindschadler, RA eds (2011) Antarctic subglacial aquatic environments. (Geophysical Monograph Series 192) American Geophysical Union, Washington, DC
Thoma, M, Grosfeld, K and Mayer, C (2008) Modelling accreted ice in subglacial Lake Vostok, Antarctica. Geophys. Res. Lett., 35(11), L11504 (doi: 10.1029/2008GL033607)
Thoma, M, Grosfeld, K, Mayer, C and Pattyn, F (2010) Interaction between ice sheet dynamics and subglacial lake circulation: a coupled modelling approach. Cryosphere, 4(1), 112 (doi: 10.5194/tc-4-1-2010)
Thoma, M, Grosfeld, K, Mayer, C and Pattyn, F (2012) Ice-flow sensitivity to boundary processes: a coupled model study in the Vostok Subglacial Lake area, Antarctica. Ann. Glaciol., 53(60), 173180 (doi: 10.3189/2012AoG60A009)
Tikku, AA, Bell, RE, Studinger, M and Clarke, GKC (2004) Ice flow field over Lake Vostok, East Antarctica, inferred by structure tracking. Earth Planet. Sci. Lett., 227(3–4), 249261 (doi: 10.1016/j.epsl.2004.09.021)
Tsyganova, EA and Salamatin, AN (2004) Non-stationary temperature field simulations along the ice flow line Ridge Line B– Vostok Station, East Antarctica. Mater. Glyatsiol. Issled./Data Glaciol. Stud. 97, 5770
Van der Veen, CJ (1999) Fundamentals of glacier dynamics. AA Balkema, Rotterdam
Wendt, A and 9 others (2005) The response of the subglacial Lake Vostok, Antarctica, to tidal and atmospheric pressure forcing. Geophys. J. Int., 161(1), 4149 (doi: 10.1111/j.1365-246X.2005.02575.x)
Wendt, J and 9 others (2006) Geodetic observations of ice flow velocities over the southern part of subglacial Lake Vostok, Antarctica, and their glaciological implications. Geophys. J. Int., 166(3), 991998 (doi: 10.1111/j.1365-246X.2006.03061.x)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed