Home > AGW, Climate Change, Data, Global Warming, Omniclimate, Science, Skepticism > Yet Another Amazing Detail About Climate Science

Yet Another Amazing Detail About Climate Science

They’ve got incredible supercomputers to play with, but still our climate scientists build up global anomaly charts from only a handful of stations (1,000 or so if the guys at Climate Monitor are not mistaken, or one on average for every area the size of Bangladesh).

You’d think world-rescuing climate specialists would have computers and bandwidth enough to handle data from a million stations by now, or a billion even. But they say they don’t even need that.

Why not? Because they have discovered that 1,200-km grids are ok. Why are they ok? Because

temperature anomaly patterns tend to be large scale

How so? Here’s the root of it all, from 1987:

The 1200-km limit is the distance at which the average correlatiom coefficient of temperature variations falls to 0.5 at middle and high latitudes and 0.33 at low latitude

Who would believe that it all depends on a correlation coefficient of…0.5?

  1. DB
    2011/01/25 at 12:10

    The 0.5 number is r. The coefficient of determination, r-squared, is the proportion of variability in a data set that is accounted for by the statistical model. Thus r^2 = 0.25 would be the important number here (and it is a pretty disappointing number at that).

  2. 2011/01/25 at 04:19

    A coefficient of 0.5 lies in the “probably something there” category. Coefficients of 0.33 are a dime a dozen and can be ignored. This ain’t science; it’s Madame Gazonga’s crystal ball.

  3. Grumpy Old Man
    2011/01/24 at 20:02

    Dear Omnologos. When I were a youth, I was taught to read a map by studying the ground and relating it to the map. The more ground identified, the more certain one’s position. Could it be that W-R CS’s having drawn a map, are not over-anxious to identify so much ground that the map will need to be re-drawn?

  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: