Edgar, It is hardly a 1:1 correlation. However, if those cycles worked for the last 1/2 million years, they should be expected to still be working now and we can expect global cooling to occur again. Richard
On Sat, Mar 22, 2014 at 10:19 AM, Edgar L. Owen <[email protected]> wrote: > Spud, > > Better evidence is that the little ice age was caused by solar variations > esp the Maunder minimum. It lasted too long to be attributed to volcanos I > would think. However volcanos and smaller asteroid impacts do certainly > cause temporary temperature dips lasting for periods of a few years to > perhaps a decade and these can initiate profound social changes. There is > fairly good evidence that the dark ages were partially initiated by an > eruption c. 535 AD. See > http://en.wikipedia.org/wiki/Extreme_weather_events_of_535-536 > > Edgar > > > > On Saturday, March 22, 2014 10:08:24 AM UTC-4, [email protected] wrote: > >> What is your view on the Little Ice Age being caused by Pacific Rim >> volcano's? Incidentally, erruptions have been proposed as the initiators of >> the environments suitable for generating plagues, in the 6th century and >> again, at the beginning of the 13th century. It gets colder so marmots and >> rats dig tunnels and are in closer contact, and thus, easier to spread >> bacilli that are bubonic, pneumonic, etc? >> >> >> -----Original Message----- >> From: Edgar L. Owen <[email protected]> >> To: everything-list <[email protected]> >> Sent: Sat, Mar 22, 2014 7:40 am >> Subject: Re: The situation at Fukushima appears to be deteriorating >> >> Richard, >> >> Here's is new research into one possible contributor to ice ages. Edgar >> >> Airborne Iron May Have Helped Cause Past Ice Ages >> 20 March 2014 2:00 pm >> [image: Life from dust. Iron-rich dust streaming from Patagonian >> deserts (red plume at left side of image) fertilizes nutrient-poor southern >> oceans, thereby pulling planet-warming carbon dioxide from the >> atmosphere.]*NASA/Goddard >> Space Flight Center, William M. Putman and Arlindo M. da Silva* >> *Life from dust.* Iron-rich dust streaming from Patagonian deserts (red >> plume at left side of image) fertilizes nutrient-poor southern oceans, >> thereby pulling planet-warming carbon dioxide from the atmosphere. >> It seems straightforward: Iron-rich dust floating on the wind falls >> into the sea, where it nourishes organisms that suck carbon dioxide from >> the air. Over time, so much of this greenhouse gas disappears from the >> atmosphere that the planet begins to cool. Scientists have proposed that >> such a process contributed to past ice ages, but they haven't had strong >> evidence--until now. >> "This is a really good paper, a big step forward in the field," says >> Edward Boyle, a marine geochemist at the Massachusetts Institute of >> Technology in Cambridge. The research doesn't directly measure the amount >> of dissolved iron in the waters due to dust in previous eras, Boyle says, >> but "they provide a much better case for what [nitrogen levels] have done >> in the past"--information that can reveal the ebb and flow of ancient life. >> The notion that iron-rich dust could boost the growth of microorganisms >> that pull carbon dioxide from the air took hold in the late 1980s. During >> ice ages, when sea levels are low and broad areas of now-submerged coastal >> shallows are exposed, sediments rich in iron and other nutrients would dry >> out, the thinking went. Then >> ... > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" 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 http://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Everything List" 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 http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
