[PDF] Top 20 Data assimilation using a hybrid ice flow model
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Data assimilation using a hybrid ice flow model
... a hybrid model that accounts for vertical shear within the ice as a forward model has several ...The hybrid model is computationally more efficient than First Order models, and ... See full document
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Using ice-flow models to evaluate potential sites of million year-old ice in Antarctica
... Fretwell, P., Pritchard, H. D., Vaughan, D. G., Bamber, J. L., Bar- rand, N. E., Bell, R., Bianchi, C., Bingham, R. G., Blankenship, D. D., Casassa, G., Catania, G., Callens, D., Conway, H., Cook, A. J., Corr, H. F. J., ... See full document
11
Development of a hybrid variational-ensemble data assimilation technique for observed lightning tested in a mesoscale model
... a hybrid ensemble- variational data assimilation method developed at Colorado State ...ensemble data assimilation methods, a cost func- tion is derived using a Gaussian ... See full document
15
Role of forcing uncertainty and background model error characterization in snow data assimilation
... of hybrid forcing inputs (to improve background model error) and in situ data-based correction of observations to be assimilated (to enhance the satellite retrievals) is likely to provide a robust ... See full document
11
Improvement of operational flood forecasting through the assimilation of satellite observations and multiple river flow data
... adjoint model and update equations for initial streamflow Q 0 and lateral in- put q L that depends on λ are ...joint model and corresponding ...adjoint model, we estimate the optimal temporal ... See full document
7
Weakly coupled atmosphere–ocean data assimilation in the Canadian global prediction system (v1)
... atmosphere–ocean–ice model has been used to produce global weather forecasts at Environ- ment and Climate Change Canada (ECCC) since Novem- ber ...uncoupled data assimilation (DA) components ... See full document
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Brief communication: The challenge and benefit of using sea ice concentration satellite data products with uncertainty estimates in summer sea ice data assimilation
... sea ice edge area are less than ...the data assimilation will have only little ...sea ice edge area and lower SDs in the concentrated cen- tral ice area but overall higher ...sea ... See full document
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Data assimilation and prognostic whole ice sheet modelling with the variationally derived, higher order, open source, and fully parallel ice sheet model VarGlaS
... to ice sheets, the method consists in minimizing the dissipation of gravitational potential energy by viscous and frictional heat ...other ice sheet models ...the model to different asymptotic ... See full document
24
Assimilation of sea-ice concentration in a global climate model – physical and statistical aspects
... sea ice at high ...sea ice has inherent predictability of up to two ...sea ice can have an influ- ence far beyond the Arctic by changing the large-scale at- mospheric circulation (Honda et ...sea ... See full document
18
Dynamically coupling full Stokes and shallow shelf approximation for marine ice sheet flow using Elmer/Ice (v8.3)
... Antarctic ice sheets are, with medium confidence, projected to contribute ...of ice dynamics. Thus, there is a great need for improvement of ice dynamical models (Ritz et ...of ice is ... See full document
14
An ice flow modeling perspective on bedrock adjustment patterns of the Greenland ice sheet
... Greenland ice sheet (GrIS) have been produced. To obtain ice mass changes, the GRACE data need to be corrected for the effect of deformation changes of the Earth’s ...where ice mass changes ... See full document
12
Influence of ice-sheet geometry and supraglacial lakes on seasonal ice-flow variability
... elevation model is posted at 1 km, it was generated from sparse flights separated by many kilometers, so the true resolution is variable and much poorer than 1 ...the data shown in ... See full document
8
Reconstructing paleoclimate fields using online data assimilation with a linear inverse model
... of data to sam- ple as the static prior ensemble, an instrumental data source to calibrate proxy observation models, and a proxy record ...proxy data are cali- brated against the NASA Goddard ... See full document
16
Performance and applicability of a 2.5-D ice-flow model in the vicinity of a dome
... Three-dimensional ice flow modelling requires a large number of computing resources and observation data, such that 2-D simulations are often ...elevation model (DEM) with a mov- ing window and ... See full document
13
TOPAZ4: an ocean-sea ice data assimilation system for the North Atlantic and Arctic
... sea ice variability in the ...EnKF-based data assimilation system is that it predicts and evolves the system’s state error covariance implicitly in the ensemble, as well as the system’s ...the ... See full document
24
Model–data comparison and data assimilation of mid-Holocene Arctic sea ice concentration
... Without assimilation, the sea ice concentration simulated by LOVECLIM shows some clear differences with the best esti- mates given by the reconstructions of de Vernal et ...the model dis- plays the ... See full document
19
Inferred basal friction and surface mass balance of the Northeast Greenland Ice Stream using data assimilation of ICESat (Ice Cloud and land Elevation Satellite) surface altimetry and ISSM (Ice Sheet (System Model)
... sophisticated data assimilation of dis- parate data sets into ice-sheet ...the Ice Sheet System Model (ISSM), to improve assimilation of surface altimetry data ... See full document
17
Data assimilation for moving mesh methods with an application to ice sheet modelling
... an ice sheet modelled by our moving mesh method (Bo- nan et ...ments using available classical surface observations (surface elevation and surface velocity; see Vaughan et ...assimilated using a ... See full document
20
On the assimilation of ice velocity and concentration data into large-scale sea ice models
... the model as well as in- direct dynamic and thermodynamic ones, due to ice thick- ness and concentration ...the ice edge and in ar- eas where thermodynamic errors are greater than dynamic ones, ... See full document
15
Recent rift formation and impact on the structural integrity of the Brunt Ice Shelf, East Antarctica
... sensing data, providing a detailed overview of glaciological changes on the Brunt Ice Shelf over the last ...radar data with high temporal and spatial resolution in the area of the tip of Chasm 1, ... See full document
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