Get Data

Download

DOWNLOADING DATA VIA FTP

Data can be downloaded through a Web browser or command line via FTP. When using a Web browser, the FTP link first directs you to an Optional Registration Form that if filled out, will allow you to receive notifications about updates or processing changes related to that specific data set. After completing the Optional Registration Form, the FTP directory becomes available. For additional help downloading data through an FTP client, go to the How to access data using an FTP client support page.

FTP
Data Set ID:
G00802

GLERL Radiation Transfer Through Freshwater Ice, Version 1

Radiation transmittance (ratio of transmitted to incident radiation) through clear ice, refrozen slush ice, and brash ice, from ice surface to ice-water interface in the 400 to 600 nanometer range (photosynthetically active range), was measured at two freshwater lakes: Silver Lake, near Ann Arbor, Michigan and Whitefish Point on Lake Superior. Data available include surface and under-ice sensor readings, date and time of observation, ice thickness, water depth, distance of under-ice sensor from ice bottom surface, and site number/location.

Geographic Coverage

Parameter(s):
  • Snow/Ice > Ice Depth/Thickness
  • Snow/Ice > Lake Ice
  • Atmospheric Radiation > Solar Radiation
  • Atmospheric Radiation > Transmittance
Spatial Coverage:

  • N: 46, S: 42, E: -83, W: -85
Spatial Resolution:
  • Varies
Temporal Coverage:
  • 1 January 1978 to 31 December 1978
Temporal Resolution: Varies
Data Format(s):
  • ASCII Text
Platform(s) GROUND-BASED OBSERVATIONS
Sensor(s): SILICON PHOTODIODES
Version: V1
Data Contributor(s): S. Bolsenga
Metadata XML: View Metadata Record

Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Bolsenga, S. J. 1995. GLERL Radiation Transfer Through Freshwater Ice, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/N5QN64N6. [Date Accessed].

Back to Top

Collapse All / Open All

Overview

Radiation transfer through clear ice, refrozen slush, and brash ice, from the ice surface to the ice-water interface in the 400-700 nanometer range was measured at two freshwater lake sites: Silver Lake (46 degrees, 46 minutes North, 83 degrees, 43 minutes West) and Lake Superior (Whitefish Point, 46 degrees, 46 minutes North, 84 degrees, 57 minutes West). Silicon photodiodes were used to measure transmittance. The data are relevant to studying the survival of plants and animals in freshwater lakes with ice or ice and snow cover. These data were collected by the NOAA Great Lakes Environmental Research Laboratory (GLERL), Ann Arbor, MI.

Detailed Data Description

Format

The data are in ASCII format. Table 1 describes the structure of the files.

Table 1. File Structure
Field name Position
Surface sensor reading (nanometers) 1- 4
Surface scale 5- 8
Under-ice sensor reading (nanometers) 9-12
Under-ice sensor scale 13-16
Hour 17-18
Minute 19-20
Month 21-22
Day 23-24
Year 25-26
Ice thickness (centimeters) 27-40
Water depth (centimeters)
(99=depth not measured; -1 = very deep;
other negative value = estimated depth)		 41-44
Under-ice sensor depth (centimeters) 45-48
Site number 49-50
Site letter 51-51
Lake name 61-72
Background color on
File Size

The total data set is 86.8 KB.

Background color on
Sample Data Record
.3551000.315 300 930122276  24            64   0 1          SILVER LAKE         
.3601000.970 100 934122276  24            64   0 1          SILVER LAKE         
.3681000.330 300 935122276  24            64   0 1          SILVER LAKE         
.3711000.750 100 937122276  24            64 -45 1          SILVER LAKE         
.5601000.390 3001055122276  24            64   0 1          SILVER LAKE
Background color on

References and Related Publications

Assel, R. A. 2005. Great Lakes weekly ice cover statistics. NOAA Technical Memorandum GLERL-133. NOAA, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, 27 pp. https://www.glerl.noaa.gov//pubs/tech_reports/glerl-133/tm-133.pdf.

Assel, R. A. 2004. Computerized National Weather Service Great Lakes ice reports for winter seasons 1899-1970. NOAA Technical Memorandum GLERL-130. NOAA, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, 31 pp. https://www.glerl.noaa.gov/pubs/tech_reports/glerl-130/tm-130.pdf.

Assel, R. A. 2004. A Laurentian Great Lakes ice cover climatology. Proceedings of the 61st Annual Meeting of the Eastern Snow Conference, Portland, Maine, June 9-11, 2004. 2 pp. http://www.glerl.noaa.gov/pubs/fulltext/2004/20040027.pdf.

Assel, R. A., F. H. Quinn, and C. E. Sellinger. 2004. Hydro-climatic factors of the recent drop in Laurentian Great Lakes water levels. Bulletin of the American Meteorological Society 85(8):1143-1151. http://www.glerl.noaa.gov/pubs/fulltext/2004/20040017.pdf.

Assel, R. A., S. Drobot, and T. E. Croley, II. 2004. Improving 30-day Great Lakes ice cover outlooks. Journal of Hydrometeorology 5(4): 713-717. http://www.glerl.noaa.gov/pubs/fulltext/2004/20040016.pdf.

Assel, R. A., S. Drobot, and T. E. CROLEY, II. 2004. Improving monthly Great Lakes ice cover outlooks. NOAA Technical Memorandum GLERL-129. NOAA, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, 22 pp. https://www.glerl.noaa.gov/pubs/tech_reports/glerl-129/tm-129.pdf.

Assel, R. A. 2004. Lake Erie ice cover climatology -- basin averaged ice cover: winters 1898-2002. NOAA Technical Memorandum GLERL-128. NOAA, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, 15 pp. https://www.glerl.noaa.gov//pubs/tech_reports/glerl-128/tm-128.pdf.

Bolsenga, S. J. 1978. Photosynthetically active radiation transfer through ice. NOAA Technical Memorandum ERL GLERL-18, 48 pages. NTIS order number PB299-463. https://www.glerl.noaa.gov/pubs/tech_reports/glerl-018/tm-018.pdf

Related NSIDC Data Collections

Contacts and Acknowledgments

Bolsenga, S.J.

Acknowledgments: 

This data set is maintained at NSIDC with support from the NOAA National Geophysical Data Center.

Document Information

Document Authors

NSIDC Technical Writers

Document Creation Date

1995

Document Revision Date

July 2017: A. Windnagel fixed the broken links in the References section.
July 2006: This document was reformatted. F. Fetterer reviewed this document.

No technical references available for this data set.
No FAQs or How Tos available for this data set.

Access complete Knowledge Base

Questions? Please contact:
NSIDC User Services
Phone: 1 303 492-6199
Email: nsidc@nsidc.org