Ancient farmers spared us from glaciers but
profoundly changed Earth's climate
University of Wisconsin-Madison, September 6, 2018
https://www.sciencedaily.com/releases/2018/09/180906141507.htm
If You Hate Ice Ages, Thank a Farmer
Chopping down forests and irrigating rice
paddies boosted greenhouse gases enough
to prevent the onset of a new ice age
Ronald Bailey|Sep. 10, 2018 2:05 pm
https://reason.com/blog/2018/09/10/thank-a-farmer-if-you-hate-ice-ages
The papers are:
Vavrus, S.J., He, F., Kutzbach, J.E., Ruddiman, W.F.
and Tzedakis, P.C., 2018. Glacial Inception in
Marine Isotope Stage 19: An Orbital Analog for a
Natural Holocene Climate. Scientific reports, 8(1),
no.10213. (open access paper)
https://www.nature.com/articles/s41598-018-28419-5
http://discovery.ucl.ac.uk/10053186/1/Vavrus_Glacial.pdf
Ruddiman, W.F., 2003. The anthropogenic
greenhouse era began thousands of years ago.
Climatic change, 61(3), pp.261-293.
http://users.clas.ufl.edu/rrusso/gly6932/ruddiman_03.pdf
http://www.whoi.edu/cms/files/ruddiman03cc_68543.pdf
Yours,
Paul H.