What are the probable climatic effects of a nuclear weapon exchange?

Consider the scientific work recently done on the consequences for the climate of a regional nuclear war fought in the sub-tropics by US researchers using the NASA computer model (Model 1E, also used by the International Panel on Climate Change to predict global warming). This and other recent research is summarized in the Nuclear Darkness website created by Steven Starr.

In particular, please note the article by Steven Starr entitled "The Climatic Consequences of Nuclear War, published in the Bulletin of the Atomic Scientists, March 2010

INESAP article by Steven Starr

See also the following primary source literature:

•Owen B. Toon, Richard P. Turco, Alan Robock, Charles Bardeen, Luke Oman, and Georgiy L. Stenchikov, Atmospheric effects and societal consequences of regional scale nuclear conflicts and acts of individual nuclear terrorism,Atmospheric Chemistry and Physics, Vol. 7, 2007, p. 1973-2002.

•Alan Robock, Luke Oman, Georgiy L. Stenchikov, Owen B. Toon, Charles Bardeen, and Richard P. Turco, Climatic consequences of regional nuclear conflicts, Atmospheric Chemistry and Physics, Vol. 7, 2007, p. 2003-2012.

•Alan Robock, Luke Oman, and Georgiy L. Stenchikov, Nuclear winter revisited with a modern climate model and current nuclear arsenals: Still catastrophic consequences, Journal of Geophysical Research – Atmospheres, Vol. 112, No. D13, 2007.