What caused the sea to inundate Beijing within the past 80,000 years?

[Andre]

Bottom line is that you'dhave to believe that climate is so sensitive to CO2 radiattive forcing. But it's not. The numbers of IPCC require an amplification of the CO2 greenhouse effect known as positive feedback. Here is the sensitivity at thermal equilibrium, fora US standard atmosphere about 0,97 C increase per doubling with no feedbacks:

http://home.wanadoo.nl/bijkerk/modtran-rad-bal.GIF

but thermal equilibrium is a long lasting process. So you'd need a lot of positive feedback, which is non existent.

 

[William Astley]

Explanation Global Warming & Cooling

A) 20 th Century Global Warming

1) 20th Century Solar Changes & Global Cloud Cover
As the thread on clouds notes, the sun is at its highest activity in 8 kyrs, the solar large scale magnetic field has doubled in the last 100 yrs, and in the last 20 years solar coronal holes have began to move towards the solar equator (The solar coronal hole creates a high speed solar wind when it passes in the Earth's direction).

"Electroscavenging"
The cloud thread in this forum describes a mechanism where rapid increases in the solar wind, causes an increase in the Global Electric Circuit which causes a potential difference between equator and Polar regions. The potential difference it is hypothesized (and data supports) removes atmospheric ions which causes low level clouds to dissipate. As the GCR created ions are removed, electroscavenging makes it appear that the Earth's temperature is no longer correlated with the solar cycle and GCR level.

A doubling of the sun's large scale magnetic field will shield the Earth from Galactic Cosmic Rays (GCR). Satellite data (See cloud thread, Palle's paper) indicates that there is a 99.5% correlation with changes in GCR and low level cloud level (over a 20 year period). An increase in GCR causes an increase in low level clouds and a decrease in GCR causes a decrease in low level clouds. The correlation between clouds and GCR holds up until 1993 at which time the satellite data indicates that low level clouds start to be reduced, which is consistent with the 'electroscavenging' process.

Palle estimates the warming due to the reduction in cloud cover 1993 to 2001 is 7.5 W/m2 or roughly three times the estimated forcing for CO2 (2.5 W/m2).

Some scientists questioned whether Palle's interpretation of the satellite cloud data was correct. Palle et al, then measured the Earth's albedo using telescopes that measured the Earth'shine reflected off of the moon. The Earth'shine data supported the satellite data.

2. CO2 and Global Warming
Is it possible that solar changes caused the majority of the 20th century warming? Yes, if Palle's data and analysis is correct. A separate thread should be started to discuss what is know concerning CO2 and its affects on the planet's temperature. Recent data indicates that there have been times in the planets history when CO2 levels have been high and the planet has been cold and visa versa. The relationship between CO2 and planetary temperature is not linear and it appears that there may be a strong negative feedback affect of clouds which regulates planetary temperature (stops the planet from warming when CO2 levels are high) rather than the assumed very strong positive feedback of water vapour with increasing planetary temperature that was assumed by the IPCC and is currently used in the climate models.

B) 21th Century Global Cooling
The 20th century warming (sun at its highest level in 8kyrs, doubling of solar large scale magnetic field, and the coronal holes moving towards the solar equator), seems to be a Henrich event which is named after the climatologist that discovered the semi-periodic event. A Henrich event is a warming of the planet which is then followed by an abrupt cooling (3C drop in temperature, 2C in five years, Younger Dryas, and then roughly 1C drop over a hundred years as the oceans cool.)

There is not consensus as to what causes the observed warming and abrupt cooling, however, there is evidence that the Younger Dryas cooling event could have been caused by a solar event. (i.e. There is a very large increase in cosmogenic nucleons, in the sea sediment data and ice core data which indicates a large increase in GCR flux during the Younger Dryas period.)

Attached is a link to the paper: "Reduced solar activity as a trigger for the start of the Younger Dryas?" that discusses the Younger Dryas Cooling event.

http://scholar.google.com/url?q=http://dept.kent.edu/geography/GEC/Reduced_solar_activity_as_a_trig.pdf&sa=X&oi=unauthorizedredirect&ct=targetlink&ust=1173034345556434&usg=__FlOTD7nJVxYUBokLsjE8z6DrfAk=

It should be noted that the Younger Dryas paper was written in 2000 before Palle's paper and findings. The Younger Dryas paper assumes the solar event is only a change in solar irradiance, rather than a change in planetary cloud cover which would be consistent with Palle's findings.

All of the public discussion associated with climate change has been concerning global warming and strongly focused on CO2. Attached is a link to lecture material by Strong that shows how the climate has changed over the last 100,000 years. Based on the climatic record interglacial periods are brief and end abruptly.

John Stone, Climate Record Over the Last 100,000 years

http://www.washington.edu/research/or/symposium/stone.pdf

When you look at the above climatic record, what do think, is causing the abrupt changes in planetary temperature and the glacial/interglacial cycle?

 

[Andre]

A) 20 th Century Global Warming

1) 20th Century Solar Changes & Global Cloud Cover


2. CO2 and Global Warming

Might be an idea to check out

Svensmark, H. 2007. Cosmoclimatology: a new theory emerges. Astronomy & Geophysics 48: 1.18-1.24.

Changes in the intensity of galactic cosmic rays alter the Earth’s cloudiness. A recent experiment has shown how electrons liberated by cosmic rays assist in making aerosols, the building blocks of cloud condensation nuclei, while anomalous climatic trends in Antarctica confirm the role of clouds in helping to drive climate change. Variations in the cosmic-ray
influx due to solar magnetic activity account well for climatic fluctuations
on decadal, centennial and millennial timescales. Over longer intervals,
the changing galactic environment of the solar system has had dramatic
consequences, including Snowball Earth episodes. A new contribution to the faint young Sun paradox is also on offer.

PM me an email address for a copy.

A Henrich event is a warming of the planet which is then followed by an abrupt cooling (3C drop in temperature, 2C in five years,

Not really. Heinrich event:

http://en.wikipedia.org/wiki/Heinrich_event

Heinrich events are regarded as profound and catastrophic events, with likely armadas of icebergs launched from the Hudson Strait.

There is not consensus as to what causes the observed warming and abrupt cooling, however, there is evidence that the Younger Dryas cooling event could have been caused by a solar event. (i.e. There is a very large increase in cosmogenic nucleons, in the sea sediment data and ice core data which indicates a large increase in GCR flux during the Younger Dryas period.)

I seem to remember that there was no dramatic 10Be spike. There was a clear delta14C spike correlating with the last spike of the Allerod 12,800 years ago. But there were other 14C spikes not correlated with younger Dryas type of events.

http://scholar.google.com/url?q=http://dept.kent.edu/geography/GEC/Reduced_solar_activity_as_a_trig.pdf&sa=X&oi=unauthorizedredirect&ct=targetlink&ust=1173034345556434&usg=__FlOTD7nJVxYUBokLsjE8z6DrfAk=

Link is dead for me but I've read a few hundred papers on the Younger Dryas.

It should be noted that the Younger Dryas paper was written in 2000 before Palle's paper and findings. The Younger Dryas paper assumes the solar event is only a change in solar irradiance, rather than a change in planetary cloud cover which would be consistent with Palle's findings.

I think it's better to find out exactly WHAT the Younger Dryas was exactly before thinking about causes. The explanation of the Greenland Ice core appears completely at odds with other geologic evidence. take for instance:

http://www.geol.lu.se/personal/seb/Geology.pdf.pdf

You can take it from me that this was norm rather than anomalous, warm dry Younger Dryas summers. It should also be noted that sea surface temperatures dropped significantly during the preceding "warm" Bolling Allerod. Low SST inhibit cloud forming. The cause of that sequence may have been the Amazon fan clathrate destabilisation event:

http://tinyurl.com/2uqdan

All of the public discussion associated with climate change has been concerning global warming and strongly focused on CO2. Attached is a link to lecture material by Strong that shows how the climate has changed over the last 100,000 years. Based on the climatic record interglacial periods are brief and end abruptly.

John Stone, Climate Record Over the Last 100,000 years

http://www.washington.edu/research/or/symposium/stone.pdf

That presentation is below standards, it contains a fraudulent graph on page 4. Other than that, more things are different than it seems

When you look at the above climatic record, what do think, is causing the abrupt changes in planetary temperature and the glacial/interglacial cycle?

Cyclic variation of Earths Geoide shape. That's a tough one.

 

[amosor]

...

 

[William Astley]

GCR Paper's Explanation for Polar See/Saw & Faint Sun

In response to Andre's Comment 63 concerning a request for recent GCR papers.

PM me an email address for a copy.

Attached is a link to Svensmark's December 2006 paper that provides an explanation for the polar sea/saw.

http://arxiv.org/pdf/physics/0612145

Svensmark's paper concerns the Antarctic anomaly, which is also called the polar see-saw. The Polar see-saw is the term used to describe the phenomena where when the Atlantic region warms the Antarctic cools and vice versa. While other hypothesis (such as ocean currents) have been proposed to explain the polar see-saw, they cannot explain why the change is simultaneous. (i.e. If the effect has due to ocean currents one would expect a delay from hemisphere to hemisphere, as the ocean currents take time to change) Svensmark's paper provides data (bore hole temperatures, see figure 1, and satellite data figure 2) to support his hypothesis that changes in global cloudiness is causing the polar see-saw.

From Svensmark's paper:

"Clouds warm the underlying surface by trapping the outgoing long-wave radiation and cool it by reflecting the short-wave radiation from the sun. In general the cooling affect is greater than the warming effect, (my comment: for low level clouds) and results in a net cooling of the Earth of 15 W/m2."

"The cooling effect is not evenly distributed. As shown in fig. 2 it is minimal around the Equator and increases towards mid-latitudes. In polar regions the clouds can have a warming effect if the re-radiation, of long-wave radiation downwards dominates over the loss of short wave radiation solar radiation (my comment: short wave radiation reflected back into space)"

In the Arctic the effect of an increase in low level clouds is about neutral. In the Antarctic due to the very high albedo of the Antarctic (more energy is reflected into space in the Antarctic than is received from the sun. i.e. Heat must move to the Antarctic region or the temperature there would drop further.), an increase in clouds causes warming.

B) Faint Sun
Attached is a link to Shaviv's paper that provides a GCR explanation as to why the Earth was warm (not covered in ice) when the sun was younger and fainter.

http://arxiv.org/pdf/astro-ph/0306477

 

[William Astley]

Milankovitch's Insolation Hypothesis. Cause of Ice Ages?

Hi Andre,

I am curious as to what you meant when you stated:

"Cyclic variation of Earths Geode shape. That's a tough one."

In response to my question what is causing the Glacial/Interglacial cycle and the abrupt climate changes.

I would assume you mean Milankovitch's insolation theory which hypothesizes that variation in the Earth's orbit (changes in orbital eccentricity and tilt of the Earth's axis which affect relative insolation levels and the relative temperature difference between the seasons) which affect whether summers are relatively warmer and winters relatively colder and visa versa, is the cause for the ice ages.

Based on that theory, the next ice age should be starting now, as the Earth is farthest from the sun June 20 and closest to the sun December 20 and the Earth's tilt is almost at its minimum. (The glacial period is hypothesized to start when summers are cool and winters are warm.) Insolation at the critical latitude 60N is the same as it was during the last glacial period maximum.

I do not see how changes in insolation could possibly result in Canada, North US States, Russia, and Northern Europe being covered with an ice sheet that is 2 miles thick. Have you read the thread what causes Ice Ages? In that thread there is data that shows an glacial period ending when insolation has close to minimum. What could have caused the planet to warm?

In response to your scepticism to my comments concerning the Younger Dryas: Please click twice on the link to the paper I referenced. You have not read the paper I referred to. The paper I referred to notes cosmogenic isotopes doubled during the Younger Dryas, it also notes that there was ice rafting during the Younger Dryas, the same as occurred during the Henrich events. Data and analysis is provided to substantiate those statements.

 

[Andre]

William,

It's now 8 years ago that I decided to solve the riddle of the Mammoth extinction. I don't think that there are very many studies left with keys words like: "Pleistocene", "Younger Dryas", that I have not read. All those studies that seek to support / explain/ proof a certain part about the hypotheses pertaining the ice age are invariably based on limited information, projecting the unknown as being granted, but most of that unknown is not unknown but actually ïgnored because it completely contradicts the current paradigms. And then there are the studies that are completely unexplained, for instance:

Beijing inundated by the sea within the past 80 k.y.: Nannofossil evidence
Wuchang Wei

Scripps Institution of Oceanography, University of California, San Diego, California 92093, USA


Manuscript Received by the Society August 7, 2001
Revised Manuscript Received December 13, 2001
Manuscript Accepted December 14, 2001

ABSTRACT

Examination of published data reveals that a marine bed in Beijing can be dated as 80 ka or younger on the basis of abundant nannofossils. This age is 30 times younger than that published previously on the basis of magnetostratigraphic and biostratigraphic interpretations. The abundant nannofossils and foraminifers suggest that Beijing was inundated by the sea within the past 80 k.y. The very recent nature of this marine transgression has profound societal and geological implications and thus calls for new studies and thorough evaluation of all relevant data sets.

I'm trying to respond to that appeal. There must be a missing player, responsible for a lot unexplained and wrongly explained phenomena. It could be a pulsating equator. See this thread:

https://www.physicsforums.com/showthread.php?t=153634