scholarly journals No Evidence for Milankovitch Cycle Influence on Abyssal Hills at Intermediate, Fast, and Superfast Spreading Rates

2018 ◽  
Vol 45 (19) ◽  
pp. 10,305-10,313 ◽  
Author(s):  
John A. Goff ◽  
Sabin Zahirovic ◽  
R. Dietmar Müller
Keyword(s):  
Milankovitch Cycle ◽  
Spreading Rates ◽  
Abyssal Hills

Quantifying the distribution and transport of pelagic sediments on young abyssal hills

1993 ◽  
Vol 20 (20) ◽  
pp. 2203-2206 ◽  
Author(s):  
Helen F. Webb ◽  
Thomas H. Jordan
Keyword(s):  
Abyssal Hills

scholarly journals Molecular Weight Dependence of Spreading Rates of Ultrathin Polymeric Films

1998 ◽  
Vol 80 (24) ◽  
pp. 5377-5380 ◽  
Author(s):  
M. P. Valignat ◽  
G. Oshanin ◽  
S. Villette ◽  
A. M. Cazabat ◽  
M. Moreau
Keyword(s):  
Molecular Weight ◽  
Polymeric Films ◽  
Molecular Weight Dependence ◽  
Spreading Rates

Turbulent Spots in Strong Adverse Pressure Gradients: Part 2 — Spot Propagation and Spreading Rates

2001 ◽  
Author(s):  
A. D’Ovidio ◽  
J. A. Harkins ◽  
J. P. Gostelow
Keyword(s):  
Separation Bubble ◽  
Reynolds Numbers ◽  
Boundary Layer Transition ◽  
Pressure Gradients ◽  
Flat Plates ◽  
Layer Transition ◽  
Turbulent Spots ◽  
Laminar Separation ◽  
Transition Length ◽  
Spreading Rates

The study of turbulent spots in strong adverse pressure gradients is of current interest in turbomachinery research. The aim of this investigation is to use information gathered from boundary layer transition and laminar separation, in wind tunnel tests on flat plates, to predict the equivalent phenomena occurring on turbomachinery blade surfaces. In Part 1 turbulent spot behavior was documented for two Reynolds numbers, corresponding to a laminar separation bubble (LSB) and an incipient separation condition (IS). In Part 2 further results are reported characterizing typical spot propagation and spreading rates and serving to validate or modify existing correlations for predicting transition length.

scholarly journals The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet

2011 ◽  
Vol 5 (3) ◽  
pp. 727-740 ◽  
Author(s):  
M. A. Martin ◽  
R. Winkelmann ◽  
M. Haseloff ◽  
T. Albrecht ◽  
E. Bueler ◽  
...  
Keyword(s):  
Steady State ◽  
Dynamic Equilibrium ◽  
Ice Sheet ◽  
Surface Velocity ◽  
Surface Mass ◽  
Ross Ice Shelf ◽  
Bed Topography ◽  
Melt Distribution ◽  
Spreading Rates ◽  
Equilibrium Simulation

Abstract. We present a dynamic equilibrium simulation of the ice sheet-shelf system on Antarctica with the Potsdam Parallel Ice Sheet Model (PISM-PIK). The simulation is initialized with present-day conditions for bed topography and ice thickness and then run to steady state with constant present-day surface mass balance. Surface temperature and sub-shelf basal melt distribution are parameterized. Grounding lines and calving fronts are free to evolve, and their modeled equilibrium state is compared to observational data. A physically-motivated calving law based on horizontal spreading rates allows for realistic calving fronts for various types of shelves. Steady-state dynamics including surface velocity and ice flux are analyzed for whole Antarctica and the Ronne-Filchner and Ross ice shelf areas in particular. The results show that the different flow regimes in sheet and shelves, and the transition zone between them, are captured reasonably well, supporting the approach of superposition of SIA and SSA for the representation of fast motion of grounded ice. This approach also leads to a natural emergence of sliding-dominated flow in stream-like features in this new 3-D marine ice sheet model.

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