I'll keep posting JAXA numbers occasionally until end September, but the minimum of 4813594 km^2 on 18 Sept seems likely to stand. I'll keep updating the temperature plots.
Daily melt: Change in Jaxa extent
| Mo | Day | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| 9 | 20 | -23282 | -45625 | 14063 | 7500 | 25000 | 36718 |
| 9 | 21 | -29531 | 781 | -25782 | 21250 | 18281 | 37032 |
| 9 | 22 | -469 | 3750 | -7812 | 35469 | 30938 | 68281 |
| 9 | 23 | 20000 | 31875 | -9375 | 63906 | -15782 | 58750 |
| 9 | 24 | 42813 | 88907 | -12813 | 5625 | -8750 | 58594 |
| 9 | 25 | 29687 | 64531 | 10469 | -5000 | 31407 | 65937 |
Jaxa Extent
| Mo | Day | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| 9 | 25 | 5407656 | 6036719 | 4265000 | 4873750 | 5439688 | 5166875 |
 AQUA AMSU-A Channel 4 (near surface) from UAH Anomaly relative to 1999-2009 mean. |  AQUA AMSU-A Channel 5 (near 4 km) from UAH Anomaly relative to 2002-2009 mean. |
Daily melt: Change in Jaxa extent
| Mo | Day | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| 9 | 3 | 18906 | -19688 | -37031 | 2812 | -18437 | -58594 |
| 9 | 4 | -6875 | -22812 | -51875 | -58125 | 8125 | -53437 |
| 9 | 5 | -11875 | -782 | -43594 | -43281 | -24531 | -56094 |
| 9 | 6 | -2187 | -16093 | -37500 | -17344 | -18282 | -42813 |
| 9 | 7 | -11407 | 3437 | -10312 | -68437 | -16250 | -66093 |
| 9 | 8 | -14375 | 13906 | -23281 | -24375 | 1563 | -37813 |
| 9 | 9 | -14375 | 313 | -13907 | -7656 | -14531 | -16719 |
| 9 | 10 | -28437 | -10000 | -32343 | 21875 | -20625 | -19843 |
| 9 | 11 | -17969 | -29375 | -23750 | 21875 | -16719 | 33593 |
| 9 | 12 | -36875 | -32500 | -15469 | -6407 | -19219 | 18594 |
| 9 | 13 | -38437 | -50156 | -4219 | -2812 | -9531 | 3750 |
| 9 | 14 | 15781 | -32344 | -32500 | 4844 | 26719 | -10156 |
| 9 | 15 | -29844 | 12344 | -23437 | -15313 | 24531 | -50156 |
| 9 | 16 | -44844 | 12031 | -157 | -5625 | -10000 | -57500 |
| 9 | 17 | -25312 | 22187 | 1094 | -7656 | 35000 | -48907 |
| 9 | 18 | -37188 | 45782 | 12656 | 17812 | 22344 | -28437 |
| 9 | 19 | -16718 | 18437 | 14844 | 8594 | 10156 | 27969 |
| 9 | 20 | -23282 | -45625 | 14063 | 7500 | 25000 | 36718 |
| 9 | 21 | -29531 | 781 | -25782 | 21250 | 18281 | 37032 |
| 9 | 22 | -469 | 3750 | -7812 | 35469 | 30938 | 68281 |
| 9 | 23 | 20000 | 31875 | -9375 | 63906 | -15782 | 58750 |
| 9 | 24 | 42813 | 88907 | -12813 | 5625 | -8750 | 58594 |
| 9 | 25 | 29687 | 64531 | 10469 | -5000 | 31407 | 65937 |
| 9 | 26 | 53125 | 3125 | 32813 | 71563 | 41093 | NA |
| 9 | 27 | 63594 | -23750 | 74375 | 58593 | 35625 | NA |
| 9 | 28 | 57031 | -42188 | 69531 | 32500 | 7969 | NA |
| 9 | 29 | 75469 | -14687 | 57969 | 58750 | 55938 | NA |
| 9 | 30 | 95156 | 22500 | 93281 | 125157 | 59375 | NA |
| 10 | 1 | 51250 | 67656 | 79375 | 114843 | 72343 | NA |
| 10 | 2 | 51719 | 85781 | 65469 | 49532 | 36250 | NA |
| 10 | 3 | 47969 | 90782 | 35468 | 141718 | -8281 | NA |
| 10 | 4 | 72187 | 113281 | 41094 | 109375 | 40625 | NA |
| 10 | 5 | 100313 | 41406 | 52188 | 95625 | 63594 | NA |
| 10 | 6 | 71562 | 1875 | 87031 | 117813 | 62969 | NA |
| 10 | 7 | 75782 | 18594 | 90469 | 149844 | 42968 | NA |
| 10 | 8 | 79375 | 35000 | 76250 | 201250 | 25625 | NA |
| 10 | 9 | 82343 | 66562 | 93125 | 135937 | 105938 | NA |
| 10 | 10 | 36094 | 62344 | 42343 | 105313 | 157031 | NA |
| 10 | 11 | 20938 | 56719 | 19844 | 102343 | 149531 | NA |
| 10 | 12 | 67968 | 125156 | -11250 | 120469 | 51719 | NA |
| 10 | 13 | 131563 | 266094 | 69844 | 155156 | 55781 | NA |
| 10 | 14 | 161094 | 217969 | 108281 | 205782 | 92657 | NA |
| 10 | 15 | 110000 | 169843 | 114531 | 174687 | 116718 | NA |
| 10 | 16 | 39218 | 135782 | 86875 | 158594 | 60313 | NA |
| 10 | 17 | 75313 | 91093 | 77657 | 122187 | 101875 | NA |
| 10 | 18 | 154219 | 58125 | 118593 | 77032 | 100937 | NA |
Posts
Nick
ReplyDeleteWelcome as an Arctic Sea Ice observer. I am finding it incredibly interesting and a real data visualization challenge.
Here's a snippet of R code to help you display the month names rather than day of year in your trend chart.
#### To plot day of year axis #############################
### Day of year axis setup
## Set up basic day of year vectors (mon_names, 1st day of mon, mo name plot pos)
mon_names <- c("Jan", "Feb", "Mar", "April", "May", "June", "July", "Aug", "Sept", "Oct","Nov","Dec")
mon_doy <- c(1,32,60,91,121,151,182,213,244,274,305,335)
mon_pos <- c(16, 46, 75, 106,135, 165, 200, 228, 255, 289, 320, 355)
## Example DOY plot using month labels
plot(DOY, sie, type="l", col = "red", axes=F)
axis(side = 1, at=mon_doy, labels=F)
axis(side=1, at= mon_pos, labels=mon_names, tick=F, line=F)
axis(side=2, at=NULL, labels=T)
Here's how my SIE chart looks using the month names:
http://chartsgraphs.files.wordpress.com/2010/06/jaxa_sie_07_10_diff_7_06.png
Kelly
Thanks, Kelly
ReplyDeleteI should have checked your site before embarking on this. I've added it to the blogroll to make sure I do so in the future. I'll experiment with your script.