Colleagues: Stephen Salter wrote: Ken has pointed out that we are already carrying out an dangerous planetary test which we do not understand. Lowell says that we started it thousands of years ago.
I believe the proper attribution for these ideas are not Caldeira and Wood but a combination of Glbert Plass and Roger Revelle and Hans Suess for the first and William Ruddiman for the second. > "If at the end of this century, measurements show that the carbon dioxide > content of the atmosphere has risen appreciably and at the same time the > temperature has continued to rise throughout the world, it will be firmly > established that carbon dioxide is an important factor in causing climatic > change² -- Gilbert Plass (1956). > > "Human beings are now carrying out a large scale geophysical experiment of a > kind that could not have happened in the past nor be reproduced in the future. > Within a few centuries we are returning to the atmosphere and oceans the > concentrated organic carbon stored in sedimentary rocks over hundreds of > millions of years. This experiment, if adequately documented, may yield a > far-reaching insight into the processes determining weather and climate² -- > REvelle and Suess (1957). > > ³The hypothesis (Ruddiman, 2003 > <http://courses.eas.ualberta.ca/eas457/Ruddiman2003.pdf>) that early > agriculture caused large enough emissions of greenhouse gases millennia ago to > offset a natural climatic cooling remains controversial² -- Ruddiman. Also, there is no doubt that clouds can be brightened (by ships tracks, etc.), but is this a climate test? Do you know that in 1947 Kathleen Blodget at General Electric told Irving Langmiur that intervening in a cloud was something much different than ³controlling the weather?² Seems to have fallen on Langmuir¹s deaf ears. Jim Fleming -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
