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Sea ice modelling, forecasting, and validation activities at Alfred Wegener Institute (AWI), Bremerhaven, Germany PowerPoint Presentation
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Sea ice modelling, forecasting, and validation activities at Alfred Wegener Institute (AWI), Bremerhaven, Germany Christian Haas Modelling Thickness profiling SAR remote sensing Operating stand-alone & coupled ice-ocean dynamic/thermodynamic models after Hibler & Lemke, Semtner

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Presentation Transcript
slide1

Sea ice modelling, forecasting, and validation activities at

Alfred Wegener Institute (AWI), Bremerhaven, Germany

Christian Haas

  • Modelling
  • Thickness profiling
  • SAR remote sensing
slide2

Operating stand-alone & coupled ice-ocean dynamic/thermodynamic models after Hibler & Lemke, Semtner

  • Viscous-plastic & elastic viscous plastic rheologies
  • Arctic and Antarctic
  • Modified and improved by Fischer, Harder, Kreyscher, Hillmer, Lieser
  • Focus on climate system studies
  • New: Finite element (FE) modelling
slide4

[1/km]

[1/km]

Ridge frequency

slide6

1951-1999

Spatial thickness and drift trends

1951-1999

slide7

1997

Temperature

Anomaly

(450 m depth)

Temperature anomalies

in the Arctic Ocean

AWI-NAOSIM

Temperature flux

through Fram Strait

fe model
Motivation

Accurate Mesh Refinement and Adaptive Meshes

Variational Formulation for Complex Rheologies

FE Model
slide10

SSM/I observations Sea ice model data

8.3.98 8.3.98

Assimilation (OI)

Model run (7 days)

SSM/I observationsSea ice model data

15.3.98 15.3.98

Assimilation (OI)

Model run (5 days)

SSM/I observations Sea ice model data

20.3.98 20.3.98

Comparison

Assimilation Scheme

slide11

SSM/I (observed)

Model (stand-alone)

Model (assimilation)

Result of Assimilation

slide13

SIMS:

Sea Ice Monitoring System

slide14

EM Bird

Helicopter-borne

EM profiling

slide17

Ice Ridging Information for

Decision Making in Shipping

slide18

SITHOS

Sea Ice Thickness Observation System

integration of sar imagery for algorithm development and extrapolation to larger ice regimes

SITHOS

Sea Ice Thickness Observation System

Integration of SAR imagery for algorithm development and extrapolation to larger ice regimes

Polarstern