Hello Alan, For Mount St. Helens in 1980, wasn’t the main reason for the lack of climate impact the fact that the explosive energy was mostly directed horizontally as opposed to upwards, so that minimal sulfur amounts reached the stratosphere. I thought that there was significant sulfur released from the eruption, but that it mostly stayed in the troposphere.
Sincerely, Paul -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Alan Robock Sent: Thursday, November 30, 2017 11:27 PM To: [email protected]; geoengineering Subject: Re: [geo] VEI vs cooling There is a positive correlation, but VEI is not a good index. It is an estimate of the explosive energy, not the amount of sulfur injected into the stratosphere, which is what determines the climate impact. Mount St. Helens in 1980 was VEI 5, very explosive, but had little SO2 and no climate impact. See the discussion on pp. 11551-11553 of my paper, http://climate.envsci.rutgers.edu/pdf/RobockFree95JD00825.pdf Alan Alan Robock, Distinguished Professor Editor, Reviews of Geophysics Department of Environmental Sciences Phone: +1-848-932-5751 Rutgers University Fax: +1-732-932-8644 14 College Farm Road E-mail: [email protected] New Brunswick, NJ 08901-8551 USA http://envsci.rutgers.edu/~robock ☮ http://twitter.com/AlanRobock 2017 Nobel Peace Prize to ICAN! Watch my 18 min TEDx talk at http://www.youtube.com/watch?v=qsrEk1oZ-54 On 11/30/2017 10:21 PM, David Appell wrote: > SRM people: > > Does a volcanic eruption's VEI correlate to the amount of cooling it > will/can cause? > > David > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
