> I don't think there is any suggestion that aerosols globally have > actually declined significantly (the emissions rate per power output may > have improved, but total power has increased). Crowley's forcing data > has aerosols monotonically increasing to 1998.
When reading the following paper by Crutzen for other reasons: http://www.springerlink.com/content/t1vn75m458373h63/fulltext.pdf I am across this snippet: "In fact, after earlier rises, global SO2 emissions and thus sulfate loading have been declining at the rate of 2.7% per year, potentially explaining the observed reverse from dimming to brightening in surface solar radiation at many stations worldwide (Wild et al., 2005). The corresponding increase in solar radiation by 0.10% per year from 1983 to 2001 (Pinker et al., 2005) contributed to the observed climatewarming during the past decade." Incidentally, there's also an estimate of the Pinatubo forcing and related cooling in there (4.5 W/m2 and 0.5 C in the year following the eruption, so another way to confirm your estimate of 0.1C for 1 W/m2 in the first year). --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. 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/globalchange -~----------~----~----~----~------~----~------~--~---
