Tidal Coefficients -- best current working set

Metadata Updated: November 12, 2020

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.

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date 2019-09-09T04:09:46-08:00
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) March 31, 2017 (lastUpdate)
Frequency Of Update unknown

Metadata Source

Harvested from DOI Open Data

Additional Metadata

Resource Type Model
Metadata Date 2019-09-09T04:09:46-08:00
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) March 31, 2017 (lastUpdate)
Responsible Party (Point of Contact); Western Alaska Landscape Conservation Cooperative (Point of Contact, Publisher)
Contact Email
Guid 3f781ee4-382f-47fe-a740-486f1d4c6cc2
Access Constraints
Coupled Resource
Frequency Of Update unknown
Licence While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, the Western Alaska Landscape Conservation Cooperative cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. The Western Alaska Landscape Conservation Cooperative makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty., null
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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