Product: 5f006a4f-3637-4cb3-be29-6e6d86c90848

Metadata Format
Product Title
A High-Resolution Integrally-Coupled Ice, Tide, Wind-Wave, and Storm Surge Model for Western Alaska
Description
This project will quantify the effect that the reduction of nearshore ice coverage has on coastal flooding by developing a model accounting for sea ice, tide, wind-driven wave dynamics and currents on storm surges along the Western Alaska coast.
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

The western coastline of Alaska is highly susceptible to coastal storms, which can cause coastal erosion, flooding, and have other pernicious effects to the environment and commercial efforts. The reduction in ice coverage due to climate change could potentially increase the frequency and degree of coastal flooding and erosion. Further, estuaries and delta systems act as conduits for storm surges, so when there is less nearshore ice coverage, these systems could introduce storm surge into terrestrial environments unaccustomed to saline intrusion, flooding, or other alien biogeochemical factors. This project quantified the effect of reduced nearshore ice coverage on coastal flooding. The project developed a large domain tide, wave and storm surge model (SWAN/WWIII + ADCIRC) for the Gulf of Alaska and Bering, Chukchi, and Beaufort Seas, with high resolution along the Western Alaska coast. This computational model was assessed using historical wind/pressure fields and station observation data and captured the complex multi-scale and interactive physics of the deep water, shelf, nearshore, coast, estuaries, and rivers, and is more robust operationally. The model's tidal solution was validated at 115 NOAA stations along the Alaska coastline for the 8 dominant astronomical tidal components and performed extremely well (R2 > 0.948 for the major semidiurnal phases, >0.945 for the amplitudes). Simulations of summer storms (ice free) predicted maximum surges within 5.5 cm of those recorded at Nome and Red Dog dock. The model did not perform as well for stronger winter storms with ice coverage, though performance was adequate to reveal that the presence of high ice coverage (>90%) may decrease the amount of surge only slightly.

Purpose:

Product Links

Product Keywords

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

Associated Products

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No associated products have been published.