ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

The hockey stick global temperature increase is real.  Exactly how much can be directly attributed to human activity is not clear.  The earth climate system is very noisy and subject to many variables.  Humans are undoubtedly affecting the atmosphere.  How much we're affecting the earth's temperature is less clear.  It's probably not sunspots that are driving the system, nor changes in solar luminance over the short run.

C
Charles Carlson
Senior Scientist
exploratorium
3601 Lyon St.
San Francisco, CA 94123
[log in to unmask]
Tel:   415-561-0319
Fax:  415-561-0370

Skype: sciskypecharlie
MobileMe: [log in to unmask]
Twitter: charliec53
http://blogs.exploratorium.edu/whyintercept/













***********************************************************************
For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.

Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit
http://www.lsoft.com/LISTSERV-powered.html.

To remove your e-mail address from the ISEN-ASTC-L list, send the
message  SIGNOFF ISEN-ASTC-L in the BODY of a message to
[log in to unmask]