"Peter D. Tillman" wrote in message
...

Does someone have a pointer(s) to a recent, unbiased review article on
the causes of major climate changes?

There is an article here;
http://www.aip.org/history/climate/rapid.htm

but be aware no one knows how rapid change happens. That is
the big danger. It could be just around the corner.

Cheers, Alastair.

"Alastair McDonald" k wrote
in message ...
"Peter D. Tillman" wrote in message
...

Does someone have a pointer(s) to a recent, unbiased review article on
the causes of major climate changes?

There is an article here;
http://www.aip.org/history/climate/rapid.htm

but be aware no one knows how rapid change happens. That is
the big danger. It could be just around the corner.

Cheers, Alastair.

There is something funny about those web pages;
Try going to this link first, then go to the section on rapid climate change.
http://www.aip.org/history/climate

With a little bit of effort you can get there!

Cheers, Alastair.

"Alastair McDonald" k wrote in message ...
"Peter D. Tillman" wrote in message
...

Does someone have a pointer(s) to a recent, unbiased review article on
the causes of major climate changes?

There is an article here;
http://www.aip.org/history/climate/rapid.htm

but be aware no one knows how rapid change happens. That is
the big danger. It could be just around the corner.

Thanks, Alastair. Very nice review--just what I was looking for.
As you say, it's more documentation that rapid changes have occurred,
and not just in polar regions. Scary stuff.

Have you (or others) read his book?
Weart, Spencer--Discovery of Global Warming, Harvard, 2003
http://www.aip.org/history/climate

Cheers -- Pete Tillman
Consulting Geologist, Tucson & Santa Fe (USA)

"Peter D. Tillman" wrote in message
m...

Thanks, Alastair. Very nice review--just what I was looking for.
As you say, it's more documentation that rapid changes have occurred,
and not just in polar regions. Scary stuff.

Have you (or others) read his book?
Weart, Spencer--Discovery of Global Warming, Harvard, 2003
http://www.aip.org/history/climate

Cheers -- Pete Tillman
Consulting Geologist, Tucson & Santa Fe (USA)

I am reading it at the moment. I only found out about it a few days
ago from a post to sci.environment by Thomas Palm.

The section on Simple Models is equally scary, but the GCM section
ends reassuringly "Nearly every expert now agreed that the old predictions
were solid - raising the CO2 level would warm the globe." He does not
say which of the old predictions were correct. Nor does he point out
that if we get rapid climate change there will be no warning, almost by
definition. Is the rise in temperature now happening in Europe and in
much else of the Northern Hemisphere the start of a rapid climate change
event which will raise tempertures by 5C in less than ten years, rather
than part of a slow warming of 3C spread over the next century?

BTW There is another book on the web about abrupt climate change
from the National Academy of Sciences. "Abrupt Climate Change:
Inevitable Surprises" (2002) See;
http://books.nap.edu/books/0309074347/html/
It is a bit heavier, but even so it also comes to no definite conclusion.

HTH,

Cheers, Alastair.

You folks may be interested to hear that (1) the Discovery of Global
Warming site has just been revised, with new text (2003) replacing the
2001 text; (2)the short narrative version in book form is in press and
should be available from Harvard University Press by late August; (3)
a condensed version of the essay on rapid climate change will be
published in the Aug. 2003 issue of "Physics Today.

--Spencer Weart

Orbital Resonances

The mean solar day loses about 230 seconds over the sidereal lunar
orbit, SLO, every million years.
Take the present SLO, 27.32166 days and divide by 27.5. Subtract
the result from one and multiply by the SLO, 2360591.47s for the
result of 15408s. Divide this by 230s for the result of 66.5 million
years.
Follow the same procedure for 28, 28.5 and 29 msds per SLO to get
the result of 249.8, 430 and 606 million years ago respectively.
These results are very close to the cretaceous, permian,
ordovicean
and precambrian extinctions respectively.
At these times the earth's magnetic field began reversing at an
increased rate of as much as 35000 percent, and sea leavels began to
rise at high latitudes and fall at middle latitudes. Temperatures
dropped with the draining of inland seas and the icing of the poles.
Could there be a siderial link between the moon's orbit and the
earth's rotation?

Further, Heinrich events, the calving off of iceburgs that leave a
layer of sediment an the atlantic floor, occured 65, 52, 39 and 12.6
thousand years ago. These correspond to the times when the earth's
axis was perpendicular to the poles of the Cosmic microwave
background. Could there be a cosmic directional force?

stephen kearney

"Old Physics" wrote in message
om...
Orbital Resonances

The mean solar day loses about 230 seconds over the sidereal lunar
orbit, SLO, every million years.
Take the present SLO, 27.32166 days and divide by 27.5. Subtract
the result from one and multiply by the SLO, 2360591.47s for the
result of 15408s. Divide this by 230s for the result of 66.5 million
years.
Follow the same procedure for 28, 28.5 and 29 msds per SLO to get
the result of 249.8, 430 and 606 million years ago respectively.
These results are very close to the cretaceous, permian,
ordovicean
and precambrian extinctions respectively.
At these times the earth's magnetic field began reversing at an
increased rate of as much as 35000 percent, and sea leavels began to
rise at high latitudes and fall at middle latitudes. Temperatures
dropped with the draining of inland seas and the icing of the poles.
Could there be a siderial link between the moon's orbit and the
earth's rotation?

You might be interested in this article in Science
http://www.sciencemag.org/cgi/conten.../286/5445/1707

Core Rotational Dynamics and Geological Events
Marianne Greff-Lefftz, 1 Hilaire Legros 2

A study of Earth's fluid core oscillations induced by lunar-solar tidal
forces, together with tidal secular deceleration of Earth's axial rotation,
shows that the rotational eigenfrequency of the fluid core and some solar
tidal waves were in resonance around 3.0 × 109, 1.8 × 109, and 3 × 108 years
ago. The associated viscomagnetic frictional power at the core boundaries may
be converted into heat and would destabilize the D" thermal layer, leading to
the generation of deep-mantle plumes, and would also increase the temperature
at the fluid core boundaries, perturbing the core dynamo process. Such
phenomena could account for large-scale episodes of continental crust
formation, the generation of flood basalts, and abrupt changes in geomagnetic
reversal frequency.

Further, Heinrich events, the calving off of iceburgs that leave a
layer of sediment an the atlantic floor, occured 65, 52, 39 and 12.6
thousand years ago. These correspond to the times when the earth's
axis was perpendicular to the poles of the Cosmic microwave
background. Could there be a cosmic directional force?

Do you have a reference for that? It is more on topic :-)

Cheers, Alastair.

"Alastair McDonald" k wrote in message ...
"Old Physics" wrote in message
om...
Orbital Resonances

The mean solar day loses about 230 seconds over the sidereal lunar
orbit, SLO, every million years.
Take the present SLO, 27.32166 days and divide by 27.5. Subtract
the result from one and multiply by the SLO, 2360591.47s for the
result of 15408s. Divide this by 230s for the result of 66.5 million
years.
Follow the same procedure for 28, 28.5 and 29 msds per SLO to get
the result of 249.8, 430 and 606 million years ago respectively.
These results are very close to the cretaceous, permian,
ordovicean
and precambrian extinctions respectively.
At these times the earth's magnetic field began reversing at an
increased rate of as much as 35000 percent, and sea leavels began to
rise at high latitudes and fall at middle latitudes. Temperatures
dropped with the draining of inland seas and the icing of the poles.
Could there be a siderial link between the moon's orbit and the
earth's rotation?

You might be interested in this article in Science
http://www.sciencemag.org/cgi/conten.../286/5445/1707

Core Rotational Dynamics and Geological Events
Marianne Greff-Lefftz, 1 Hilaire Legros 2

A study of Earth's fluid core oscillations induced by lunar-solar tidal
forces, together with tidal secular deceleration of Earth's axial rotation,
shows that the rotational eigenfrequency of the fluid core and some solar
tidal waves were in resonance around 3.0 × 109, 1.8 × 109, and 3 × 108 years
ago. The associated viscomagnetic frictional power at the core boundaries may
be converted into heat and would destabilize the D" thermal layer, leading to
the generation of deep-mantle plumes, and would also increase the temperature
at the fluid core boundaries, perturbing the core dynamo process. Such
phenomena could account for large-scale episodes of continental crust
formation, the generation of flood basalts, and abrupt changes in geomagnetic
reversal frequency.

Further, Heinrich events, the calving off of iceburgs that leave a
layer of sediment an the atlantic floor, occured 65, 52, 39 and 12.6
thousand years ago. These correspond to the times when the earth's
axis was perpendicular to the poles of the Cosmic microwave
background. Could there be a cosmic directional force?

Do you have a reference for that? It is more on topic :-)

Cheers, Alastair.

The reference to Heinrich events is from Science News, I think in
1993. On the web I found the events were at 40, 51 and 68 Kyrs ago.
There is definitely a link in time between the increase in
magnetic field reversals and the extinctions at the end of the permian
and creataceous eras 250 and 67 Myrs ago respectively. Thank you for
your information.

Respectfully,
stephen kearney

(Old Physics) wrote in message . com...
Orbital Resonances

The mean solar day loses about 230 seconds over the sidereal lunar
orbit, SLO, every million years.
Take the present SLO, 27.32166 days and divide by 27.5. Subtract
the result from one and multiply by the SLO, 2360591.47s for the
result of 15408s. Divide this by 230s for the result of 66.5 million
years.
Follow the same procedure for 28, 28.5 and 29 msds per SLO to get
the result of 249.8, 430 and 606 million years ago respectively.
These results are very close to the cretaceous, permian,
ordovicean
and precambrian extinctions respectively.
At these times the earth's magnetic field began reversing at an
increased rate of as much as 35000 percent, and sea leavels began to
rise at high latitudes and fall at middle latitudes. Temperatures
dropped with the draining of inland seas and the icing of the poles.
Could there be a siderial link between the moon's orbit and the
earth's rotation?

Further, Heinrich events, the calving off of iceburgs that leave a
layer of sediment an the atlantic floor, occured 65, 52, 39 and 12.6
thousand years ago. These correspond to the times when the earth's
axis was perpendicular to the poles of the Cosmic microwave
background. Could there be a cosmic directional force?

stephen kearney

Dr. McDonald,

The reference is from a 1993 issue of Science News. I have seen
other references that put Heinrich events at 40, 51 and 68 thousand
yrs ago.
Do the solar tide resonances that you mention actually correspond
to magnetic field reversals? sk

"Old Physics" wrote in message
om...
(Old Physics) wrote in message
. com...
Orbital Resonances

The mean solar day loses about 230 seconds over the sidereal lunar
orbit, SLO, every million years.
Take the present SLO, 27.32166 days and divide by 27.5. Subtract
the result from one and multiply by the SLO, 2360591.47s for the
result of 15408s. Divide this by 230s for the result of 66.5 million
years.
Follow the same procedure for 28, 28.5 and 29 msds per SLO to get
the result of 249.8, 430 and 606 million years ago respectively.
These results are very close to the cretaceous, permian,
ordovicean
and precambrian extinctions respectively.
At these times the earth's magnetic field began reversing at an
increased rate of as much as 35000 percent, and sea leavels began to
rise at high latitudes and fall at middle latitudes. Temperatures
dropped with the draining of inland seas and the icing of the poles.
Could there be a siderial link between the moon's orbit and the
earth's rotation?

Further, Heinrich events, the calving off of iceburgs that leave a
layer of sediment an the atlantic floor, occured 65, 52, 39 and 12.6
thousand years ago. These correspond to the times when the earth's
axis was perpendicular to the poles of the Cosmic microwave
background. Could there be a cosmic directional force?

stephen kearney

Dr. McDonald,

I ain't no doctor,

The reference is from a 1993 issue of Science News. I have seen
other references that put Heinrich events at 40, 51 and 68 thousand
yrs ago.

Yes, it was not the date of Heinrich events I was querying. It was the
pole of the cosmic microwave background, and the Earth's obliquity.

Do the solar tide resonances that you mention actually correspond
to magnetic field reversals?

You will need to check that for yourself.

Cheers, Alastair.