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Arctic Sea Ice In Perspective

October 29, 2012
tags: ,

 

By Paul Homewood

 

http://nsidc.org/data/seaice_index/

 

We commonly see graphs like the one above from NSIDC, which attempt to show how quickly the Arctic sea ice is disappearing. We also hear about the ice extent reaching record lows.

However, both claims centre around the ice conditions at the minimum, which occurs in September every year.

But what about the rest of the year? Conditions in one week in September don’t have any more significance than they do in any other week of the year.

So what does ice extent look like when you look at conditions all year round? The graph below takes the NSIDC numbers and plots them as a 365 day running average.

 

image

ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/north/

 

 

There was a decline up to 2007, but since then there is not much changing. Indeed the current average is running slightly higher than at this time last year, and also higher than 2007, which still registers the lowest points on the chart.

It does not look as if the Arctic ice is going anywhere quickly.

2 Comments
  1. October 30, 2012 3:13 am

    But even one ice-free day causes disaster. Doncha know that? The explanation is technical, though, don’t worry your little head about it.

  2. NevenA permalink
    November 1, 2012 11:09 pm

    The 1000 day running average looks even less remarkable.

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