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having come from wisconsin, where growing up near the great lake of
michigan and south of lake superior i would view
temperature gradients
that seemed to
go down as i looked westward
toward a colder minnesota,
and even colder dakotas,
and having moved to the san francisco bay area over 15 years ago as of 2006,
where microclimates beat this concept home, i.e. of
the effect of the differential of heat capacity between
oceanic and continental regions.
for perhaps the ultimate illustration of this, i offer the map at left
of the pacific northwest and point out that
portland gets more snow than seattle
because of this effect!
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i mentioned almost falling off my chair when i saw the
"phanerozoic"
graph above,
perhaps partly due to the fact that the term "phanerozoic"
also appears in the title of the research offered that introduced
the transisition from small to large antarctic ice sheets
above, but certainly because of the
wonderfully complete
record of climate change, which actually is intimately related to
the definition of "phanerozoic."
when i first received the below research in april of 2006,
i had another falling off chair moment, having an inclination
that perhaps someone had read my mind (or perhaps this webpage),
but in my life, i have a number of such epiphanies of connection
and have came up with the nonparanoid conclusion that i have had
a communion with truth
that i have instead shared with others.
the "phanerozoic" graph presents to me a basis for further research,
namely the investigation of the cause of
three additional glacial periods
(and perhaps the "snowball earth" phenomenon, i believe at 780 Ma)
which may or may not be the same as the cause of the current one,
but i had already been intimately aware of the latest
glacial period
in which we currently reside.
the above research nicely connects the ideas presented of the
differential heat capacity of continents versus oceanic regions
and focuses the knowledge by investigating the
opening of the drake passage
which today remains the smallest body of water that separates
antarctica from the rest of the werld, located between the
southern tip of south america and the antarctic peninsula.
a quick explanation
of the above diagram is that oceanic mixing ratios were investigated using
143Nd /
144Nd (neodymium) isotope ratio oceanic mixing
this investigation yeilded the conclusion that the opening of the passage
and concomitant formation of the
antarctic circumpolar current
that largely thermally isolates antarctica from the rest of the werld
occured about
41 million years ago
(41 Ma or 41 My).
antialarmists like to say "it's a cycle,"
and to this i want to say right now,
WHAT'S THE CAUSE?
WHAT'S THE CAUSE?
WHAT'S THE CAUSE?
note: i am using the term "antialarmist"
because if i am accused of being an alarmist,
and there is legitimite cause for alarm,
SO BE IT!!!
however, if there is something that can be done,
then i am all for doing it,
and if there is no cause for alarm,
then this is a truth i want to discern.
however, there are those, especially in the economics community
who seem set against anything that smells like an alarm.
to me they are ostriches with their head in the sand.
calling them "conservatives" seems oxymoronic to me.
if they were truly conservative with respect to
the dangers of climate change,
then they would want to err on the side of caution.
this is something that fossil fuel driven society is
FAR FAR FAR
from getting close to accomplishing!
that being said, ONWARD.
at 41 Ma, antarctica had moved
by continental drift,
close enough to its modern position so as to isolate itself via the
antarctic circumpolar current
as discerned by
143Nd /
144Nd (neodymium) isotope ratio oceanic mixing
in the above research.
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