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  4. Historical Ice Breakup Dates for Chequamegon Bay, Lake Superior (ver. 5.0, September 2022)

Historical Ice Breakup Dates for Chequamegon Bay, Lake Superior (ver. 5.0, September 2022)

Dates

Publication Date
Start Date
1911
End Date
2022
Last Revision
2022-09-23

Citation

Evrard, L.M., 2018, Historical Ice Breakup Dates for Chequamegon Bay, Lake Superior (ver. 5.0, September 2022): U.S. Geological Survey data release, https://doi.org/10.5066/F7HT2NNP.

Summary

Ice breakup dates of Chequamegon Bay, Lake Superior from 1911 to 2022 were compiled by Lori Evrard (USGS, GLSC, Lake Superior Biological Station, Ashland, WI). Ice breakup date is the day in spring when winter ice cover substantially leaves a water body. Local residents deem "ice breakup" as when the ice moves northeast of a line straight across Chequamegon Bay out from Ellis Avenue (State highway 13). Another way ice breakup was determined has been if you could drive a boat from the outlet of Fish Creek to Houghton Point. The ice may move back and forth over that line but the ice is breaking up, moving and melting from that date on. Ellis Avenue ends on a bluff (46.5925 degrees North, 90.8827 degrees West) that provides a clear view [...]

Child Items (1)

Contacts

Point of Contact :
Lori M Evrard
Originator :
Lori M Evrard
Metadata Contact :
Lori M Evrard
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Great Lakes Science Center
USGS Mission Area :
Ecosystems

Attached Files

Click on title to download individual files attached to this item.

Cheq_Bay_Ice_Breakup_Map.jpg
“A map indicating where ice has to reach to be considered the ice breakup date.” 		thumbnail 416.12 KB image/jpeg
Cheq_Bay_Ice_Breakup_1911_2022_USGS.csv
“Data file described in the XML metadata” 		1.97 KB text/csv
Cheq_Bay_Ice_Breakup_graph_trendline_1911_2022.jpg
“A graph showing date points, an average date line, and a negative trendline.” 		thumbnail 444.96 KB image/jpeg
Cheq_Bay_Ice_Breakup_revision_history_20220920.txt
“Descriptions of each data release version” 		2.1 KB text/plain
Cheq_Bay_Ice_Breakup_v5.0_metadata_20220920.xml
“Descriptions of each data release version.”
Original FGDC Metadata
View 		16.01 KB application/fgdc+xml

Purpose

Data was collected by townspeople from 1911 to 1999 and 2001 and was provided to the USGS station in Ashland, WI. USGS continued monitoring the ice condition and recorded the date of ice breakup to present. USGS converted each date to a consecutive day of the year value. Ice breakup dates can be important data for climate research.
A map indicating where ice has to reach to be considered the ice breakup date.
A map indicating where ice has to reach to be considered the ice breakup date.

Map

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Communities

  • Great Lakes Science Center (GLSC)
  • USGS Data Release Products

Tags

Provenance

Revision 4.0 by Sofia Dabrowski on September 23, 2022. To review the changes that were made, see “Cheq_Bay_Ice_Breakup_revision_history_20220920.txt” in the attached files section.

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/F7HT2NNP

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