Product: c804ded9-146a-4a58-a791-34292ed88558

Metadata Format
Product Title
Modeling Tides and Storm Surge Under Varying Sea Ice Conditions in the Gulf of Alaska and Bering, Chukchi, and Beaufort Seas
Description
Draft Report regarding the project.
Project ID
0e8091c2-5dff-4719-a96b-f7b1294b4f57
Project Title
A High-Resolution Integrally-Coupled Ice, Tide, Wind-Wave, and Storm Surge Model for Western Alaska
Point of Contact(s)
LCC Network Data Steward
LCC Network Data Manager
lccdatasteward@fws.gov
Western Alaska Landscape Conservation Cooperative
1011 E. Tudor Road MS 281
Anchorage, Alaska 99503
Western Alaska Landscape Conservation Cooperative
1011 E. Tudor Road MS 281
Anchorage, Alaska 99503

Product Abstract

An integrated high resolution tide and storm surge model has been developed for all of coastal Alaska. The model uses the ADCIRC basin-to-channel scale unstructured grid circulation code. Tidal forcing from global tidal models and meteorological forcing from the Climate Forecast System Reanalysis are used. The model’s tidal solution has been validated at 121 shelf and nearshore stations. The model’s skill has been investigated for summer, fall and winter storms. Sea ice has been incorporated through a parameterized wind drag coefficient which modifies the air-sea drag under ice coverage. Three large storms with distinctly different ice coverages were chosen to exhibit the effect of sea ice on the resulting storm surge. The root mean square error does not exceed 20 cm at any station. Forming coastal ice coverage increases coastal water levels, but the peaks are under predicted at the validation stations. Under dense pack ice, an increase in momentum transfer in the marginal sea ice at the shelf break leads to increased coastal water levels despite the decreased wind stress across the shelf pack ice. In highly variable ice fields, results are mixed, as the underlying assumptions about ice movement used to derive the drag parameterization may fail. To improve model performance for coastal water levels, it would be desirable to include the contribution of wave radiation stresses induced in marginal ice zones. Furthermore, including sea ice drift and current speeds explicitly in the air-sea-ice drag formulation would improve the description of momentum transferred to the water column.

Purpose:

Product Links

Product Keywords

  • ISO 19115 Topic Category (isoTopicCategory):
    • climatologyMeteorologyAtmosphere,
    • disaster,
    • environment,
    • geoscientificInformation,
    • oceans
  • Global Change Master Directory (GCMD) Science Keywords (theme):
    • ESTUARIES,
    • STORMS,
    • STORM SURGE,
    • ICE GROWTH/MELT,
    • COASTAL PROCESSES,
    • FLOODING,
    • MODELS,
    • TIDES,
    • DELTAS,
    • ICE EXTENT,
    • WAVE SPEED/DIRECTION,
    • WIND SPEED/WIND DIRECTION,
    • COASTAL AREAS
  • End User Types - Landscape Conservation Cooperatives (LCC End User Type):
    • Regional & county planners,
    • Federal resource managers,
    • Academics & scientific researchers

Associated Products

ID Title Metadata Link
1e10bdbb-10e4-4e88-afea-906cb63c351a Model mesh and bathymetry specification mdJSON ISO 19115-2 HTML
1e10bdbb-10e4-4e88-afea-906cb63c351a Westhuysen Webinar - A high-resolution, integrally-coupled ice, tide, wind-wave, and storm surge model for western Alaska mdJSON ISO 19115-2 HTML
1e10bdbb-10e4-4e88-afea-906cb63c351a A High-Resolution Coupled Tide and Storm Surge Model for the Gulf of Alaska, Bering Sea, Chuckchi Sea, and Beaufort Sea mdJSON ISO 19115-2 HTML
1e10bdbb-10e4-4e88-afea-906cb63c351a Large Scale Wave, Tide, and Surge Modeling in Sometimes Icy Waters mdJSON ISO 19115-2 HTML
1e10bdbb-10e4-4e88-afea-906cb63c351a Bathymetry over model domain mdJSON ISO 19115-2 HTML
1e10bdbb-10e4-4e88-afea-906cb63c351a Tidal Coefficients -- best current working set mdJSON ISO 19115-2 HTML