Antarctic tidal melting ... first results
Question:
Approach:
Model Evaluation: Tides
Complex RMSD to ATG:
Sigma_comb = 15 cm
M2: 12 cm
N2: 3 cm
K1: 7 cm
O1: 5 cm
Model Evaluation: Tides
Our total basal mass loss: 1248 Gt/a
1735 ± 164 Gt/a
Rignot et al. 2013
Evaluation: basal melting
Satellite based studies:
1090 - 1600 Gt/a
Results: tidal melting
Summary
Results: nodal tidal melting
Upcoming: in-band variance and mean melting
Upcoming: 1 km resolution
St-Laurent, P., J. M. Klinck, and M. S. Dinniman (2015), Impact of local winter cooling on the melt of Pine Island Glacier, Antarctica, J. Geophys. Res. Oceans, 120
Models: 1571-1899
1600
642, 739
762 Gt/a
Evaluation: basal melting
Basal mass balance:
1325 ± 235 Gt/a
using Satellite data
1325 ± 235 Gt/a
1735 ± 164 Gt/a
Rignot et al. 2013
Schodlok et al. 2016
Evaluation: basal melting
using ocean Models
1600 Gt/a
MetROMS: 642 Gt/a
FESOM: 739 Gt/a.
Evaluation: basal melting
using ocean Models
1516 ± 106 Gt/y
1,454 ± 174 Gt/y
Evaluation: basal melting
using Satellite data
What are the mechanisms involved in ice sheet retreat?
tides?
Tidal ice shelf flexure
Far field sea level rise!
Atmosphere and
ocean warming!
Tide sea ice interaction
Tidal melting
... ?
Bugs: embrace failure!
Results: nodal tidal melting
Results: tidal melting
Makinson et al. (2011)
Results: tidal melting at PD
Results: tidal melting
Mueller et al. (2012)