World map of station temperature trends

This revised page shows a shaded WebGL plot of station trends of monthly average temperature over various periods to present (you can choose). The coloring is intended to represent the station values exactly, with continuous shading in between. It uses ERSST with GHCN V3 for land - you can choose adjusted or unadjusted. This version uses the apparatus of MoyGLV2.1 unadjusted GHCN V3 with ERSST, though adjusted GHCN is an option. Posts for earlier versions were here and later here. This page was one of my first efforts with WebGL, so both the data and methods needed updating. The earlier page is preserved here

Operating advice below.



As usual, the sphere is a trackball that you drag into position. When you press the mouse down, it also shows data for the nearest station, on the right. At the top is an orient button, which will take the current worldview and reorient so north is up. Below are the various V2 facilities. You can use checkboxes to hide various components, like nodes or edge lines, and use the radio buttons to select trend periods. The prefix un_ means GHCN V3 unadjusted; ad_ means adjusted.



You can click on the globe to show name and data of the nearest station. Trends are shown for stations which have at least 83% (10/12) of months in the period reporting.



4 comments:

  1. Very nice Nick.

    I think it might be better if all trends were shown on the same colour scale i.e. trends over any period fixed at say -0.5 to 1.5C/decade irrespective of the actual trends.

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    1. Thanks, Clive.
      I think there needs to be some flexibility of scale - trends starting 1907 have a much smaller range than starting in 1997. But it would certainly be a good idea to use the same scales for unadjusted and adjusted, for comparison. And I could arrange for the scales to change in just a few steps, going back in time. I'll do that.

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  2. Nice visuals. People have also used Google Earth to make good animations e.g. http://geode.net/pangaeaBreakup/

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    1. Thanks, RB,
      I used to work woth Google Earth files - a recent post with links is here. But I foun dthat there was a lot of overhead, and not much flexibility. So I switched to uning Google Maps, eg here, where I can use Javascript. But I haven't tried animations.

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