Preprints
https://doi.org/10.5194/gmd-2017-39
https://doi.org/10.5194/gmd-2017-39

Submitted as: model description paper 09 Mar 2017

Submitted as: model description paper | 09 Mar 2017

Review status: this preprint has been withdrawn by the authors.

An Operational Thermodynamic-Dynamic Model for the Coastal Labrador Sea Ice Melt Season

Ian D. Turnbull1 and Rocky S. Taylor1,2 Ian D. Turnbull and Rocky S. Taylor
  • 1C-CORE
  • 2Memorial University of Newfoundland (MUN)

Abstract. An offshore operations thermodynamic-dynamic prediction model of sea ice break-up and drift is presented for central coastal Labrador in Atlantic Canada, and demonstrated for portions of the 2015 spring break-up of the land-fast ice. The model validation is performed using the data from ice tracking buoys deployed on the land-fast ice, which began drifting after break-up of the land-fast ice. The model uses a one-dimensional thermodynamic parameterization for ice melt and growth, includes snow accumulation and melt, and melt-pond and lead growth and contraction. The dynamic model uses a Smoothed Particle Hydrodynamics (SPH) parameterization for ice motion and changes in ice thickness and concentration. The dynamic forcing parameters include wind and ocean current drag, Coriolis deflection, internal ice stresses, and gravitational forcing due to sea surface gradients. A coastal repulsion force is employed to prevent ice particles from crossing the coastal boundaries. The model is sensitive to the prescribed initial snow depth on the sea ice. In the present work, analysis of results is focused on the offshore regions of Makkovik and Nain, Labrador. The melt of the coastal land-fast ice in these regions can be adequately simulated by the thermodynamic model alone. The model predicts the timing of the local land-fast ice break-up to within 4.6 hours to six days, and can simulate observed ice buoy drift speeds to within 1.5 meters per second.

This preprint has been withdrawn.

Ian D. Turnbull and Rocky S. Taylor

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Ian D. Turnbull and Rocky S. Taylor

Ian D. Turnbull and Rocky S. Taylor

Viewed

Total article views: 970 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
596 298 76 970 56 86
  • HTML: 596
  • PDF: 298
  • XML: 76
  • Total: 970
  • BibTeX: 56
  • EndNote: 86
Views and downloads (calculated since 09 Mar 2017)
Cumulative views and downloads (calculated since 09 Mar 2017)

Viewed (geographical distribution)

Total article views: 919 (including HTML, PDF, and XML) Thereof 917 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Latest update: 24 Jul 2021
Download

This preprint has been withdrawn.

Short summary
We developed a model to forecast the timing of the seasonal break-up of coastal Labrador land-fast ice in order to aid offshore operators in the region with their planning and decision-making process. The model additionally provides shorter-term (several days) ice drift forecasts for the operators. Our model can forecast the break-up of the land-fast ice at specific locations along the Labrador coast accurately to within hours to days when initialized up to a month in advance.