Pages

5 comments

Jump to bottom
1 Norman Branitsky  Sun, Jul 4, 2010 7:46:35pm

Seems to be a nicely laid out paper. I have two comments:
1. B4 "Climate change is driven by cosmic rays"
Claims of a CRF-climate link on the million year time scale (Shaviv and Veizer 2003)
have been disputed (Rahmstorf et al. 2004).

Here is Shaviv's response on his web site to the Rahmstorf et al.2004 paper:
"Rahmstorf et al. 2004 published a comment stating that almost all Veizer and I did was wrong. We showed in our response why every comment is irrelevant or invalid. In their response to the rebuttal, Rahmstorf et al. did not address any of our rebuttal comments (I presume because they could not). Instead, they used faulty statistics to demonstrate that our results are statistically insignificant. (Basically, they used Bartlett's formula for the effective number of degrees of freedom in a limit where the original derivation breaks down)."

Just because someone has written a paper with lots of citations, you still have to be diligent as a reader because not all the citations may be valid.

2. C6 "CO2 does not drive climate" is missing from this paper.
(The -=- was the only way I could make a reasonable table as more than 3 characters like "." or "-" are collapsed to just 3 characters.)

Time-=-=-=-=-Glaciation-=-=-=-=-=-=-CO2 (ppmv)
450-420 Ma-=-Ordovician-Silurian-=-=-4000(*)
360-260 Ma-=-Carboniferous-Permian-=400
151-132 Ma-=-Jurassic-Cretaceous-=-=2000(*)
Present Day-=-=-=-=-=-=-=-=-=-=-=-=-389

(*) Berner, R. A. and Kothavala, Z. 2001: Geocarb III: A revised model of atmospheric CO2 over Phanerozoic time.
American Journal of Science 301:182-204

The obvious question the Urs Neu paper neglects to answer is how the Earth could be covered in glaciers if the atmospheric CO2 was 5 or 10 times the present day value? Why wasn't the Earth's climate a runaway greenhouse with so much atmospheric CO2?

2 freetoken  Sun, Jul 4, 2010 7:50:16pm

re: #1 dinky

The obvious question the Urs Neu paper neglects to answer is how the Earth could be covered in glaciers if the atmospheric CO2 was 5 or 10 times the present day value? Why wasn't the Earth's climate a runaway greenhouse with so much atmospheric CO2?


These sort of questions get asked, and answered, all the time.

BTW, of what period are you thinking when you say "10 times the present day value"?

3 Norman Branitsky  Sun, Jul 4, 2010 8:31:38pm

re: #2 freetoken

These sort of questions get asked, and answered, all the time.


I'm just asking. Have any links you can direct me to that answers this specific question?

BTW, of what period are you thinking when you say "10 times the present day value"?


Ordovician-Silurian Glaciation (450-420 Ma) as listed in my table.

4 b_sharp  Sun, Jul 4, 2010 8:47:50pm

re: #1 dinky


The obvious question the Urs Neu paper neglects to answer is how the Earth could be covered in glaciers if the atmospheric CO2 was 5 or 10 times the present day value? Why wasn't the Earth's climate a runaway greenhouse with so much atmospheric CO2?

Although it isn't possible to know for sure, there have been several explanations given.

Simply put, during that time period, solar output was less than it is now, CO2 estimates for the time were high, the cooling preceded the CO2, and the increase in CO2 pulled the Earth out of the cooling period.

John Cook at Skeptical Science has a good write up on it including cites to specific papers.

5 b_sharp  Sun, Jul 4, 2010 8:58:29pm

Here is another paper disputing the work of Shaviv et al.

Again John Cook has an article on the Cosmic question including Shaviv's rebuttal to that paper and Sloan's response to the rebuttal.


This page has been archived.
Comments are closed.

^ back to top ^

TwitterFacebook

Turn off all ads for a full year by subscribing!
For about 33 cents a day (per month) or 22 cents a day (per year), our subscription option turns off all advertisements at LGF!
Read more...

► LGF Headlines

  • Loading...

► Tweeted Articles

  • Loading...

► Tweeted Pages

  • Loading...

► Top 10 Comments

  • Loading...

► Bottom Comments

  • Loading...

► Recent Comments

  • Loading...

► Tools/Info

► Tag Cloud

► Contact

You must have Javascript enabled to use the contact form.
Your email:

Subject:

Message:


Messages may be published unless you request otherwise.
Tech Note:
Using the Contact Form
LGF Pages

This button leads to the main index of LGF Pages, our user-submitted articles. You can post your own LGF Pages simply by registering a free account with us.

Create a Page

This is the LGF Pages posting bookmarklet. To use it, drag this button to your browser's bookmark bar, and title it 'LGF Pages' (or whatever you like). Then browse to a site you want to post, select some text on the page to use for a quote, click the bookmarklet, and the Pages posting window will appear with the title, text, and any embedded video or audio files already filled in, ready to go.

Or... you can just click this button to open the Pages posting window right away.

Last updated: 2014-03-07 2:19 pm PST

LGF User's Guide
Recent Pages
andres
He Dropped One Letter in His Name While Applying for Jobs, and the Responses Rolled In
His name is José Zamora, and he had a routine. During his months-long job search, he says he logged onto his computer every morning and combed the internet for listings, applying to everything he felt qualified for. In the ...

1 hour, 33 minutes ago
Views: 66 • Comments: 0
Tweets: 0 • Rating: 0
Aye Pod
Scots voting no to independence would be an astonishing act of self-harm
Great piece by George Monbiot. To vote no is to choose to live under a political system that sustains one of the rich world's highest levels of inequality and deprivation. This is a system in which all major parties are ...

4 hours, 1 minute ago
Views: 81 • Comments: 4
Tweets: 0 • Rating: 0
Randall Gross
Merrill Shapiro Joins Lawsuit Against Rick Scott
A Flagler County resident who heads the local branch of the State Democratic Progressive Caucus of Florida and the board of trustees of Americans United for Separation of Church and State has joined a lawsuit against Governor Rick Scott ...

4 hours, 48 minutes ago
Views: 79 • Comments: 0
Tweets: 1 • Rating: 0
Dr. Matt
Angry Ram Takes Down a Drone…and its Owner
From the youtube page of Buddhanz1: I was looking for the angry ram with my fpv quadcopter, I got a bit close & he managed to hit it knocking it into a bush, luckily no harm done. When I went ...

7 hours, 25 minutes ago
Views: 167 • Comments: 0
Tweets: 1 • Rating: 1
Hyped Up On Ganja
Lindsay Lohan reveals she’s voting for Mitt Romney because ‘employment is really important’
Asked to expound on her comment, Miss Lohan giggled, and replied "Wingnut Mormons are so $$#@#$ hawt and junk" / But this was not the first time the fledgling political pundit has jumped into the presidential twitter fray. In early ...

1 day, 10 hours ago
Views: 257 • Comments: 0
Tweets: 0 • Rating: 0
Souliren
Natalie MacMaster
2 days, 8 hours ago
Views: 156 • Comments: 1
Tweets: 0 • Rating: 1
The War TARDIS
Doctor Who “Into the Dalek” Open Thread
This episode will echo old Dalek episodes, both with a bit of a twist. Also, Clara will be finding someone, as she seems to be moving from her feelings of the 11th. But, this for talking.

3 days, 10 hours ago
Views: 322 • Comments: 42
Tweets: 0 • Rating: 5
FemNaziBitch
Roger Goodell: ‘I Didn’t Get It Right.’ -NFL TAKES A NEW STANCE DOMESTIC VIOLENCE
NFL commissioner Roger Goodell admits he was wrong on the Ray Rice decision, and Goodell took an important step Thursday towards showing the league is serious about cracking down on domestic violence as well as sexual assault. In a ...

4 days, 16 hours ago
Views: 285 • Comments: 1
Tweets: 0 • Rating: 4
sagehen
Doctor Who Spoiler Thread
For those who want to post immediately... live... without having to hide spoilers behind the button.

1 week, 3 days ago
Views: 719 • Comments: 99
Tweets: 0 • Rating: 6
EiMitch
Escapist: Maniac Cop
escapistmagazine.com Link broken? The gist is that this is an impressively sarcastic review of an old slasher flick based on the "unrealistic" premise of a cop abusing his power to murder people.

1 week, 4 days ago
Views: 541 • Comments: 1
Tweets: 0 • Rating: 1
 Frank says:

I figure the odds are fifty-fifty I just might have some thing to say.