Half of global warming due to weather station data homogenization


More climate science, as distinct from climate pseudo-science!

When “skeptics” argue about the validity of CAGW, it is not always against the claim of actual average GT increases. Some actual warming is real because of a higher population density, energy usage (not pollution but creation of heat in the process),  and terrain changes resulting in more stored and measured heat. (Loosely described as ‘urban heat island’ effect).

Then there is the possibility that due to the solar heat source, read “where the heat comes from“, and related factors, it is not necessarily so that the planet has an ongoing warming trend. Historically,  trends include cooling phases and it is conceivable that this will not change. Some evidence suggests we are already into such a cooling phase.

One of the main “skeptic” arguments is that ‘claimed measured temperature increases’ are false or exaggerated. This argument is strongly supported by this particular article, reblogged from WUWT.

So, of the claimed warming, part is due to “urban heat”, some is due to “cooking the books” and whatever remains is a lot less. The ‘lot less’ still remains to be scientifically convincingly tied to the atmospheric CO2 level.

Bottom line, the carbon control mechanisms are a fraud as they have no valid scientific basis.

Watts Up With That?

From the told ya so department, comes this recently presented paper at the European Geosciences Union meeting.

Authors Steirou and Koutsoyiannis, after taking homogenization errors into account find global warming over the past century was only about one-half [0.42°C] of that claimed by the IPCC [0.7-0.8°C].

Here’s the part I really like:  of 67% of the weather stations examined, questionable adjustments were made to raw data that resulted in:

“increased positive trends, decreased negative trends, or changed negative trends to positive,” whereas “the expected proportions would be 1/2 (50%).”

And…

“homogenation practices used until today are mainly statistical, not well justified by experiments, and are rarely supported by metadata. It can be argued that they often lead to false results: natural features of hydroclimatic times series are regarded as errors and are adjusted.”

The paper abstract and my helpful visualization on homogenization of data follows:

View original post 728 more words

Advertisements

About Ken McMurtrie

Retired Electronics Engineer, most recently installing and maintaining medical X-Ray equipment. A mature age "student" of Life and Nature, an advocate of Truth, Justice and Humanity, promoting awareness of the injustices in the world.
This entry was posted in AGW, AUSTRALIA, carbon tax, climate change, ENVIRONMENT, Science, World Issues and tagged , , , , , , , , . Bookmark the permalink.

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