Archive for September, 2011

There’s been no warming since 2001, er no, better make that 2010

September 14, 2011

Joanna Nova’s handbook says:

The world has not warmed since 2001.

… and …

Satellites circling the planet twice a day show that the world has not warmed since 2001.

Nova uses cherry picking (selecting a small subset of data instead of looking at the whole picture) in order to fool her readers into thinking that warming has stopped.

When you look at all the data, it’s clear the planet is warming.

This is the graph Nova has in her handbook.

Nova cites GISS and UAH as sources for the data and you can view that data for between 2001 and 2009 at WoodForTrees. Yes, no trickery in the handbook, it’s flat. So too are other parts of the temperature record as natural short term fluctuations overwhelm the long term trend. Over lengthier periods, the fluctuation flips and the warming resumes.

A couple of years later, this is what the graph look like. The warming resumes (see WoodForTrees).

Nova’s handbook is in need of an update, do you think she’s likely to do this any time soon, or will she wait for the next “levelling off” to occur?

Good science doesn’t just cherry pick one small section; it looks a the larger picture as shown in the first graph. Nova doesn’t practice good science, she hopes you don’t notice.