There are several scientific organisations that keep an eye on the Arctic sea ice cover and put out graphs to inform us of the amount of ice that is left. You can see most, if not all, of them on the ASI Graphs webpage. I expect the record on most of these graphs to be broken in weeks to come.
After Uni Bremen extent, Arctic ROOS area, Cryosphere Today sea ice area, DMI sea ice extent and CT Arctic Basin SIA, another big domino has fallen, one of the most popular graphs in recent years, mostly because they have downloadable daily updated data: IJIS sea ice extent.
Here's how the graph I use for ASI updates is looking right now:
The 2012 has plunged below all previous minimums, but I have to add the caveat that this is based on a preliminary data point for August 24th, which will be revised tomorrow. It needs to be revised upwards by 66 thousand square km for this record not to remain standing. Even if this happens, the record will almost certainly be broken tomorrow.
Here are the numbers for the IJIS SIE minimums in the 2005-2012 period:
- 2005: 5.315 million square km
- 2006: 5.781 million square km
- 2007: 4.255 million square km
- 2008: 4.715 million square km
- 2009: 5.250 million square km
- 2010: 4.814 million square km
- 2011: 4.527 million square km
- 2012: 4.189 million square km (and running)
Another caveat is that the IARC-JAXA Information System (IJIS) - an international collaboration between the International Arctic Research Center (IARC) in corporation with the Japan Aerospace Exploration Agency (JAXA) - has switched from the AMSR-E to the WindSat sensor, when AMSR-E stopped functioning last year. WindSat isn't as sophisticated as AMSR-E, so this could cause slight inconsistencies between the yearly numbers.
However, it seems that IJIS is soon switching to ASMR-2, the Advanced Microwave Scanning Radiometer 2, that is similar to predecessor ASMR-E, but better. All data will be consistent again when that happens. More on that later.
Next up is NSIDC daily sea ice extent or Arctic ROOS sea ice extent...