[LINK] Global Warming Yes or no.

[Andy Farkas]

On Tue, Nov 9, 2010 at 7:55 PM, Kim Holburn <kim at holburn.net> wrote:

> Actually this graph:
>
> http://www.bom.gov.au/cgi-bin/climate/change/timeseries.cgi?graph=tmean&area=aus&season=0112&ave_yr=15
>
> Is interesting.  It has the mean temperature for the whole of Australia from about 1910 to 2010.

What does it mean where it says "Based on a 30-year climatology (1961-90)"  ?

-andyf

ps. to all: please remember to trim replies and try not to top-post.