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Global Lake and River Ice Phenology

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Freeze/Thaw Dates Search

This interface allows the retrieval of freeze dates, thaw dates, and freeze duration for some of the world's lakes and rivers. The physical characteristics of the lakes and rivers in the database (such as lake area, depth, and elevation) can be found on the lake and river information page. Search tips are available in the documentation.

Choose Geographical Options

By Country:

Latitude and Longitude:

North (Max: +82.50)
West (Min: -140.40)	East (Max: +149.30)
South (Min: +36.15)

Lake or River Name:

Name Code (uniquely identifies lakes or rivers with the same name):

Lake and/or River:

Lake Only
River Only
Either Lake or River

Froze or Not (returns records depending on whether or not the lake or river froze):

Did Freeze
Did not Freeze
Either

Choose Year Options (yyyy)

Minimum Year:(Min: 1444)
Maximum Year:(Max: 2004)

Choose Output Parameter Options

Ice On Date (yyyy,mm,dd)
Ice Off Date (yyyy,mm,dd)
Ice Duration (ddd: number of days)
Season (yyyy-yy: fall year-spring year)
Frozen (Y/N whether or not lake or river froze)

Latitude
Longitude
Lake Name
Lake Code
Lake or River
Country Name

Choose Output Sort Options

Ice Duration
Ice Season
Latitude
Longitude
Lake Name
Lake or River (lakes, then rivers)
Country Name

Choose Output Format Options

Output to Browser
Output to gzipped file (use your browser's "Save As..." and add .gz to the suggested filename to save)
Output to TSV ASCII file (tab-separated; use your browser's "Save As..." to save)