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Great Lakes Ice Cover Data Set and Climatology Introduction Original Ice Charts First Ice, Last Ice and Ice Duration Daily Ice Cover Time Series Weekly Ice Cover Statistics Questions / Contact GLERL home  
   
 

Original Ice Charts

Ice Charts | Period of Record Files (POR files)

Ice attribute grids from Assel et al. (2002)


1. .ct: the total percentage concentration
download: por_ct.zip for 1973-2000 (6.8 MB)

2. .ca: the percentage concentration of the thickest ice type
download: por_ca.zip for 1973-2000 (6.9 MB)

3. .cb: the percentage concentration of the next thickest ice type
download: por_cb.zip for 1973-2000 (6.6 MB)

4. .cc: the percentage concentration of the next thickest ice type
download: por_cc.zip for 1973-2000 (6.2 MB)

5. .so: the thickest ice present, assigned 5% concentration
download: por_so.zip for 1973-2000 (5.7 MB)

6. .sa: the thickness of ca
download: por_sa.zip for 1973-2000 (6.5 MB)

7. .sb: the thickness of cb
download: por_sb.zip for 1973-2000 (6.4 MB)

8. .sc: the thickness of cc
download: por_sc.zip for 1973-2000 (6.0 MB)

9. .sd: the thinnest ice present, normally greater than 10 percent
download: por_sd.zip for 1973-2000 (5.7 MB)

10. .fa: the floe size of ca
download: por_fa.zip for 1973-2000 (6.3 MB)

11. .fb: the floe size of cb
download: por_fb.zip for 1973-2000 (6.2 MB)

12. .fc: the floe size of cc
download: por_fc.zip for 1973-2000 (6.0 MB)

13. .~: the percentage concentration of ice in strips & patchs
download: por_~.zip for 1973-2000 (5.8 MB)

14. .id: the polygon identification numbers
download: por_id.zip for 1973-2000 (7.0 MB)

15. .txt: text files with polygon ice codes for each ice chart
download: por_txt.zip for 1973-2000 (471 KB)

 

 
 

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