World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

A Data-constrained Model for Compatibility Check of Remotely Sensed Basal Melting with the Hydrography in Front of Antarctic Ice Shelves : Volume 8, Issue 1 (05/02/2014)

By Olbers, D.

Click here to view

Book Id: WPLBN0004023149
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: A Data-constrained Model for Compatibility Check of Remotely Sensed Basal Melting with the Hydrography in Front of Antarctic Ice Shelves : Volume 8, Issue 1 (05/02/2014)  
Author: Olbers, D.
Volume: Vol. 8, Issue 1
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Hellmer, H. H., J. H. Buc, F. F., & Olbers, D. (2014). A Data-constrained Model for Compatibility Check of Remotely Sensed Basal Melting with the Hydrography in Front of Antarctic Ice Shelves : Volume 8, Issue 1 (05/02/2014). Retrieved from

Description: Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bussestr. 24, 27570 Bremerhaven, Germany. The ice shelf caverns around Antarctica are sources of cold and fresh water which contributes to the formation of Antarctic bottom water and thus to the ventilation of the deep basins of the World Ocean. While a realistic simulation of the cavern circulation requires high resolution, because of the complicated bottom topography and ice shelf morphology, the physics of melting and freezing at the ice shelf base is relatively simple. We have developed an analytically solvable box model of the cavern thermohaline state, using the formulation of melting and freezing as in Olbers and Hellmer (2010). There is high resolution along the cavern's path of the overturning circulation whereas the cross-path resolution is fairly coarse. The circulation in the cavern is prescribed and used as a tuning parameter to constrain the solution by attempting to match observed ranges for outflow temperature and salinity at the ice shelf front as well as of the mean basal melt rate. The method, tested for six Antarctic ice shelves, can be used for a quick estimate of melt/freeze rates and the overturning rate in particular caverns, given the temperature and salinity of the inflow and the above mentioned constrains for outflow and melting. In turn, the model can also be used for testing the compatibility of remotely sensed basal mass loss with observed cavern inflow characteristics.

A data-constrained model for compatibility check of remotely sensed basal melting with the hydrography in front of Antarctic ice shelves

Assmann, K., Hellmer, H. H., and Beckmann, A.: Seasonal variation in circulation and water mass distribution on the Ross Sea continental shelf, Antarct. Sci., 15, 3–11, 2003.; Beckmann, A., Hellmer, H., and Timmermann, R.: A numerical model of the Weddell Sea: large scale circulation and water mass distribution, J. Geophys. Res., 104, 23375–23391, 1999.; Corr, H., Doake, C., Jenkins, A., and Vaughan, D.: Investigations of an ice plain in the mouth of Pine Island Glacier, Antarctica, J. Glaciol., 47, 51–57, 2001.; Determann, J.: Numerical modelling of ice shelf dynamics, Antarct. Sci., 3, 187–194, 1991.; Gade, H. G.: Melting of ice in sea water: a primitive model with application to the Antarctic ice shelf and icebergs, J. Phys. Oceanogr., 9, 189–198, 1979.; Gerdes, R., Determann, J., and Grosfeld, K.: Ocean circulation beneath Filchner-Ronne Ice Shelf from three-dimensional model results, J. Geophys. Res., 104, 15827–15842, 1999.; Hellmer, H. H. and Jacobs, S. S.: Seasonal circulation under the eastern Ross Ice Shelf, Antarctica, J. Geophys. Res., 100, 10873–10885, 1995.; Hellmer, H. H. and Olbers, D. J.: A two-dimensional model for the thermohaline circulation under an ice shelf, Antarct. Sci., 1, 325–336, 1989.; Hellmer, H., Jacobs, S., and Jenkins, A.: Oceanic erosion of a floating Antarctic glacier in the Amundsen Sea, in: Ocean, Ice, and Atmosphere: Interactions at the Antarctic Continental Margin, edited by: Jacobs, S. and Weiss, R., Antarctic Research Series, vol. 75, American Geophysical Union, Washington DC, USA, 319–339, 1998.; Holland, D. M. and Jenkins, A.: Modeling thermodynamic ice-ocean interactions at the base of an ice shelf, J. Phys. Oceanogr., 29, 1787–1800, 1999.; Jacobs, S. S. and Giulivi, C. F.: Interannual ocean and sea ice variability in the Ross Sea, in: Ocean, Ice and Atmosphere: Interactions at Antarctic Continental Margin, edited by: Jacobs, S. S. and Weiss, R., Antarctic Research Series, vol. 75, American Geophysical Union, Washington DC, USA, 1998.; Jacobs, S. S., Hellmer, H. H., and Jenkins, A.: Antarctic ice sheet melting in the Southeast Pacific, Geophys. Res. Lett., 23, 957–960, 1996.; Jacobs, S. S., Jenkins, A., Giulivi, C. F., and Dutrieux, P.: Stronger ocean circulation and increased melting under Pine Island Glacier ice shelf, Nat. Geosci., 4, 519–523, 2011.; Jenkins, A.: A one-dimensional model of ice shelf-ocean interaction, J. Geophys. Res., 96, 20671–20677, 1991.; Jenkins, A., Hellmer, H. H., and Holland, D. M.: The role of meltwater advection in the formulation of conservative boundary conditions at an ice–ocean interface, J. Phys. Oceanogr., 31, 285–296, 2001.; Jenkins, A., Dutrieux, P., Jacobs, S., McPhail, S., Perrett, J., Webb, A., and White, D.: Observations beneath Pine Island Glacier in West Antarctica and implications for its retreat, Nat. Geosci., 3, 468–472, 2010.; Losch, M.: Modeling ice shelf cavities in a z-coordinate ocean general circulation model, J. Geophys. Res., 113, C08043, doi:10.1029/2007JC004368, 2008.; Nakayama, Y., Schröder, M., and Hellmer, H. H.: From circumpolar deep water to the glacial meltwater plume on the eastern Amundsen Shelf, Deep-Sea Res., 77, 50–62, 2013.; Nicholls, K. W., Østerhus, S., Makinson, K., and Johnson, M. R.: Oceanographic conditions south of Berkner Island, beneath Filchner-Ronne Ice Shelf, Antarctica, J. Geophys. Res., 106, 11481–11492, 2001.; Nicholls, K. W., Padman, L., Schröder, M., Woodgate, R. A., Jenkins, A., and Østerhus, S.: Water mass modification over the continental shelf north of Ronne Ice Shelf, Antarctica, J. Geophys. Res., 108, 3260, doi:10.1029/2002JC001713, 2003.; Nicholls, K. W., Pudsey, C. J., and Morris, P.: Summertime water masses off the northern Larsen C Ice Shelf, Antarctica, Geophys. Res. Lett., 31, L09309, doi:10.1029/2004GL019924&l


Click To View

Additional Books

  • Spectral Reflectance of Solar Light from... (by )
  • Modelling Past and Future Permafrost Con... (by )
  • A Computationally Efficient Model for th... (by )
  • A Particle Based Simulation Model for Gl... (by )
  • Northern Hemisphere Spring Snow Cover Va... (by )
  • Brief Communication: Historical Glacier ... (by )
  • Role of Rainwater Induced Subsurface Flo... (by )
  • Thermal State of the Active Layer and Pe... (by )
  • Weekly-gridded Aquarius L-band Radiomete... (by )
  • Tomography-based Monitoring of Isotherma... (by )
  • The Snowdrift Effect on Snow Deposition:... (by )
  • Antarctic Ice-mass Balance 2002 to 2011:... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.