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Nenana Ice Classic: Tanana River Ice Annual Breakup Dates, Version 2

Metadata Updated: December 7, 2023

The Tanana river in the Interior of Alaska usually freezes over during October and November. The ice continues to grow throughout the winter accumulating an average maximum thickness of about 110 cm, depending upon winter weather conditions.

The Nenana Ice Classic competition began in 1917 when railroad engineers bet a total of 800 dollars, winner takes all, guessing the exact time (month, day, hour, minute) ice on the Tanana River would break up. Each year since then, Alaska residents have guessed at the timing of the river breakup. A tripod, connected to an on-shore clock with a string, is planted in two feet of river ice during river freeze-up in October or November. The following spring, the clock automatically stops when the tripod moves as the ice breaks up. The time on the clock is used as the river ice breakup time.

Many factors influence the river ice breakup, such as air temperature, ice thickness, snow cover, wind, water temperature, and depth of water below the ice. Generally, the Tanana river ice breaks up in late April or early May (historically, April 20 to May 20). The time series of Tanana river ice breakup dates can be used to indicate climate change in the region.

Access & Use Information

Public: This dataset is intended for public access and use. 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 Created Date November 12, 2020
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023
Publisher NASA NSIDC DAAC
Maintainer
Identifier C1923770664-NSIDCV0
Data First Published 1917-04-01
Language en-US
Data Last Modified 2023-11-28
Category geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Nenana Ice Classic: Tanana River Ice Annual Breakup Dates, Version 2. Version 2. Archived by National Aeronautics and Space Administration, U.S. Government, NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/CAQ58H42LQY2.
Harvest Object Id 3d3f27b2-36e2-4959-9ccf-1ef500e44ff1
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/CAQ58H42LQY2
Metadata Type geospatial
Old Spatial -149.093 64.565 -149.093 64.565
Program Code 026:001
Source Datajson Identifier True
Source Hash 0f21cf2fbacffa6b37e21a2224b37389e316e82cc943fa36de9e39b4792dd871
Source Schema Version 1.1
Spatial
Temporal 1917-04-01T00:00:00Z/2023-12-04T00:00:00Z

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