Flat snow cover

Posted: November 23, 2016 by tchannon in sea ice

Tim writes,

From time to time I look at datasets to see how things are progressing. Often there is no news.

Image

Snow cover change from mean, Tim’s method. Regime change assumed 1982, data split to show different linear change. Fall during the early years, flat thereafter.

Data is from the Rutgers university Global Snow Lab.

Not shown is how I have produced the change data. The Synth software in annual mode was used over three regimes where the annual variation is obviously different. Protest if you want.

As with plenty of other datasets there is a sharp change in data circa 2007. I have put this down to orbital geometry, satellites etc. change. In this case it ought to make no difference. Alternatively there have been very distinct changes on earth no-one has noticed.

The last time I looked at this data was 2013. Quite naturally I compared the data, oh dear.

Image

Diff between data taken 2013 and 2016.

This looks dramatic but actually has little effect. What are the authors doing? I have no idea

If you want data, ask.

Post by Tim

 

Comments
  1. oldbrew says:

    It’s been snowing in Tokyo.

    DT: Tokyo hit by first November snow in 54 years

    The snow, which began as sleet around dawn but turned to snow soon after, was sparked by an unusual cold front spreading over the Tokyo area that sent temperatures down to near zero C (32 F).
    http://www.telegraph.co.uk/news/2016/11/24/tokyo-hit-first-november-snow-54-years/

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