Free Republic
Browse · Search
News/Activism
Topics · Post Article

"66% to 75% of the Earth's temperature variation of the past 500 million years may be attributable to CRF variations due to solar system passages thru the spiral arms of the Milky Way galaxy."

Absolutely awesome, ties in nicely with the observed warming in the rest of the solar system as well.

1 posted on 09/29/2003 1:47:28 PM PDT by PeaceBeWithYou
[ Post Reply | Private Reply | View Replies ]


To: PeaceBeWithYou
It will be interesting to see the responses to this. It assumes, of course, that the earth is at least 500 million years old and that various dating methods are accurate...
2 posted on 09/29/2003 1:53:52 PM PDT by js1138
[ Post Reply | Private Reply | To 1 | View Replies ]

To: PeaceBeWithYou
After presenting several half-billion year histories of T, CRF and pCO2 derived from various types of proxy data, Shaviv and Veizer note that none of the pCO2 curves

The Earth can't be that old. These guys must all be part of that evolution religion. [/sarcasm]

3 posted on 09/29/2003 1:58:13 PM PDT by narby
[ Post Reply | Private Reply | To 1 | View Replies ]

To: PeaceBeWithYou
I love it when sensible, plausible, empirically defensible hypotheses and data are adduced on this question. It happens 3-4 times a year, to resounding silence from the media. If there are ripples of cosmic energy for our system to pass through periodically, that would certainly help to explain the ebb and flow of temperature norms.
5 posted on 09/29/2003 2:02:04 PM PDT by Migraine (my grain is pretty straight today)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: PeaceBeWithYou
And when they talk about "cold intervals" they mean "ice ages":

astro-ph/0209252 [abs, src, ps, other] :

Title:
The Spiral Structure of the Milky Way, Cosmic Rays, and Ice Age Epochs on Earth
Authors: Nir J. Shaviv
Comments: 33 pages, 11 figures. To Appear in New Astronomy
The short term variability of the Galactic cosmic ray flux (CRF) reaching Earth has been previously associated with variations in the global low altitude cloud cover. This CRF variability arises from changes in the solar wind strength. However, cosmic ray variability also arises intrinsically from variable activity of and motion through the Milky Way. Thus, if indeed the CRF climate connection is real, the increased CRF witnessed while crossing the spiral arms could be responsible for a larger global cloud cover and a reduced temperature, thereby facilitating the occurrences of ice ages. This picture has been recently shown to be supported by various data (Shaviv, 2001). In particular, the variable CRF recorded in Iron meteorites appears to vary synchronously with the appearance ice ages.
Here we expand upon the original treatment with a more thorough analysis and more supporting evidence. In particular, we discuss the cosmic ray diffusion model which considers the motion of the Galactic spiral arms. We also elaborate on the structure and dynamics of the Milky Way's spiral arms. In particular, we bring forth new argumentation using HI observations which imply that the galactic spiral arm pattern speed appears to be that which fits the glaciation period and the cosmic-ray flux record extracted from Iron meteorites. In addition, we show that apparent peaks in the star formation rate history, as deduced by several authors, coincides with particularly icy epochs, while the long period of 1 to 2 Gyr before present, during which no glaciations are known to have occurred, coincides with a significant paucity in the past star formation rate. (485kb)

 

 

6 posted on 09/29/2003 2:03:45 PM PDT by Dan Evans
[ Post Reply | Private Reply | To 1 | View Replies ]

To: PeaceBeWithYou
Cool find. Take that greenhouse gasbags.
8 posted on 09/29/2003 2:06:51 PM PDT by neverdem (Say a prayer for New York both for it's lefty statism and the probability the city will be hit again)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: PeaceBeWithYou
Hey man. Don't bother me with facts. I just know it's those SUV's that are causing all the problems. Besides, how am I going to sue the cosmos? Sheesh, get with the program. You're harshing my mellow.
10 posted on 09/29/2003 2:26:38 PM PDT by Artem55
[ Post Reply | Private Reply | To 1 | View Replies ]

To: PeaceBeWithYou
The truth is out there if you don't let your politics confuse it.
11 posted on 09/29/2003 2:27:27 PM PDT by Rockitz (After all these years, it's still rocket science.)
[ Post Reply | Private Reply | To 1 | View Replies ]

Free Republic
Browse · Search
News/Activism
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson