Update: Another day another error to report. It appears that the percentage was calculated wrong. Instead of 43.8% it is 83.1%. Still the fastest ever. Corrected table below.
Year | Minimum_Extent | Extent | Extent_Change | Extent_Change_Pct |
2012 | 3.36855 | 292 | 2.7991 | 83.1 |
2008 | 4.55469 | 294 | 3.4633 | 76 |
2010 | 4.59918 | 294 | 3.0069 | 65.4 |
2005 | 5.31832 | 297 | 3.23051 | 60.7 |
1990 | 6.0191 | 296 | 3.49865 | 58.1 |
1999 | 5.68009 | 287 | 2.80655 | 49.4 |
1991 | 6.26027 | 291 | 2.8399 | 45.4 |
2002 | 5.62456 | 288 | 2.49981 | 44.4 |
2004 | 5.77608 | 295 | 2.45647 | 42.5 |
1989 | 6.88931 | 297 | 2.7717 | 40.2 |
2000 | 5.9442 | 287 | 2.30344 | 38.8 |
2003 | 5.97198 | 292 | 2.28954 | 38.3 |
1979 | 6.89236 | 296 | 2.55691 | 37.1 |
1998 | 6.29922 | 292 | 2.32009 | 36.8 |
2007 | 4.1607 | 289 | 1.50469 | 36.2 |
2006 | 5.74877 | 289 | 1.95637 | 34 |
1982 | 7.15423 | 288 | 2.41499 | 33.8 |
1984 | 6.39916 | 292 | 2.08442 | 32.6 |
1993 | 6.15699 | 281 | 1.99632 | 32.4 |
2009 | 5.05488 | 287 | 1.59002 | 31.5 |
2011 | 4.30207 | 283 | 1.34784 | 31.3 |
2001 | 6.56774 | 294 | 1.98268 | 30.2 |
1988 | 7.04905 | 287 | 1.85327 | 26.3 |
1986 | 7.12351 | 281 | 1.8491 | 26 |
1996 | 7.15283 | 286 | 1.85602 | 25.9 |
1981 | 6.88784 | 285 | 1.71672 | 24.9 |
1992 | 7.16324 | 283 | 1.77142 | 24.7 |
1983 | 7.19145 | 283 | 1.70096 | 23.7 |
1985 | 6.4799 | 282 | 1.50769 | 23.3 |
1987 | 6.89159 | 277 | 1.55764 | 22.6 |
1994 | 6.92645 | 280 | 1.19137 | 17.2 |
1980 | 7.52476 | 281 | 0.95144 | 12.6 |
1997 | 6.61353 | 278 | 0.75388 | 11.4 |
1995 | 5.98945 | 284 | 0.59766 | 10 |
Today is day 291 in the Arctic. The minimum in 2012 was on day 260 – 31 days ago.
If you calculate the percentage of ice gained (the refreeze) 31 days after minimum, then 2012 is the fastest refreeze ever!
Arctic Sea Ice Extent has increased by 43.8% since the minimum was reached.
Extents are in millions of sq km.
(And note I am using NSIDC data here and their algorithm is making the refreeze appear slow compared to NORSEX)
Incorrect Table:
Year | Minimum_Extent | Extent Day | Extent_Change | Extent_Change_Pct |
1979 | 6.89236 | 295 | 2.55691 | 27.1 |
1980 | 7.52476 | 280 | 0.95144 | 11.2 |
1981 | 6.88784 | 284 | 1.71672 | 20 |
1982 | 7.15423 | 287 | 2.41499 | 25.2 |
1983 | 7.19145 | 282 | 1.70096 | 19.1 |
1984 | 6.39916 | 291 | 2.08442 | 24.6 |
1985 | 6.4799 | 281 | 1.50769 | 18.9 |
1986 | 7.12351 | 280 | 1.8491 | 20.6 |
1987 | 6.89159 | 276 | 1.37713 | 16.7 |
1988 | 7.04905 | 286 | 1.76783 | 20.1 |
1989 | 6.88931 | 296 | 2.70935 | 28.2 |
1990 | 6.0191 | 295 | 3.46791 | 36.6 |
1991 | 6.26027 | 290 | 2.69726 | 30.1 |
1992 | 7.16324 | 282 | 1.67903 | 19 |
1993 | 6.15699 | 280 | 1.85199 | 23.1 |
1994 | 6.92645 | 279 | 1.1014 | 13.7 |
1995 | 5.98945 | 283 | 0.5189 | 8 |
1996 | 7.15283 | 285 | 1.77882 | 19.9 |
1997 | 6.61353 | 277 | 0.65032 | 9 |
1998 | 6.29922 | 291 | 2.35169 | 27.2 |
1999 | 5.68009 | 286 | 2.68723 | 32.1 |
2000 | 5.9442 | 286 | 2.32372 | 28.1 |
2001 | 6.56774 | 293 | 1.95252 | 22.9 |
2002 | 5.62456 | 287 | 2.41992 | 30.1 |
2003 | 5.97198 | 291 | 2.10126 | 26 |
2004 | 5.77608 | 294 | 2.37329 | 29.1 |
2005 | 5.31832 | 296 | 3.09221 | 36.8 |
2006 | 5.74877 | 288 | 1.72446 | 23.1 |
2007 | 4.1607 | 288 | 1.39556 | 25.1 |
2008 | 4.55469 | 293 | 3.33615 | 42.3 |
2009 | 5.05488 | 286 | 1.45951 | 22.4 |
2010 | 4.59918 | 293 | 2.88065 | 38.5 |
2011 | 4.30207 | 282 | 1.35023 | 23.9 |
2012 | 3.36855 | 291 | 2.62409 | 43.8 |
Your percentage figures don’t show the *rate* of refreeze. The amount of refreeze over the 31 days – the extent-change column, gives a better idea and suggests this isn’t the fastest refreeze ever 🙂
I did a post on that. As well as being the fastest in terms of percentage, it is the 8th largest amount of new ice.
I did tag this post Mockery.