Forum

 
  Back to OzPolitic.com   Welcome, Guest. Please Login or Register
  Forum Home Album HelpSearch Recent Rules LoginRegister  
 

Pages: 1 2 3 4 5 6 
Send Topic Print
How does the Greenhouse effect work? (Read 6610 times)
lee
Gold Member
*****
Offline


Australian Politics

Posts: 21673
Gender: male
Re: How does the Greenhouse effect work?
Reply #45 - Aug 27th, 2017 at 9:00pm
 
Jovial Monk wrote on Aug 27th, 2017 at 8:05pm:
Way to go misrepresenting what was said in your own quote.



You seemed to be confused. Not unusual.

The 0.2ºC is the figure your quote provided for the change in global average temperatures 2001-2010 compared to the previous decade.

"Temperatures during the period spanning 2001 to 2010, for example, were around 0.2 degrees Celsius higher than the previous decade."

https://phys.org/news/2017-08-sun-current-global-temperature.html#jCp

So if 0.54ºC annually is insignificant, a change of 0.2ºC over a decade must be way down in the noise. Wink
Back to top
 
 
IP Logged
 
Jovial Monk
Gold Member
*****
Offline


Dogs not cats!

Posts: 51474
Gender: male
Re: How does the Greenhouse effect work?
Reply #46 - Aug 27th, 2017 at 9:13pm
 
That .54 only occurs on some days, drongo. That is why they said not statistically significant.
Back to top
 

OzPolitic needs a >real< Environment MRB now!
OzPolitic needs a >real< Food MRB now!
OzPolitic needs a >real< Health MRB now!
OzPolitic needs a >real< Economics MRB now!

Topics in the right MRB!
 
IP Logged
 
Jovial Monk
Gold Member
*****
Offline


Dogs not cats!

Posts: 51474
Gender: male
Re: How does the Greenhouse effect work?
Reply #47 - Aug 27th, 2017 at 9:27pm
 
We have moved a long way from “How does the greenhouse effect work?”

GHG molecules, which have three or more atoms, have energy states which match frequencies in the thermal IR band.

Water vapor is the main GHG but its concentration changes due to evaporation-condensation-precipitation. It leaves a small (Cpl Lees thinks it is large, we will let him say that and laugh at him behind his back  Wink ) window which the other GHGs narrow further.

A GHG molecule can absorb a photon of IR and become excited, vibrating faster and bumping into other gas molecules in the atmosphere, warming the atmosphere. Some molecules will re-emit the IR photon, as likely downwards as upwards, warming the surface.


Can we concentrate discussion on that, please?
Back to top
 

OzPolitic needs a >real< Environment MRB now!
OzPolitic needs a >real< Food MRB now!
OzPolitic needs a >real< Health MRB now!
OzPolitic needs a >real< Economics MRB now!

Topics in the right MRB!
 
IP Logged
 
lee
Gold Member
*****
Offline


Australian Politics

Posts: 21673
Gender: male
Re: How does the Greenhouse effect work?
Reply #48 - Aug 27th, 2017 at 10:13pm
 
Jovial Monk wrote on Aug 27th, 2017 at 9:13pm:
That .54 only occurs on some days, drongo. That is why they said not statistically significant.


Hey drongo. Reading comprehension issues again?

"The results show that the medium-sized Stevenson screen tended to overheat daily maximum air temperatures (0.54 ∘ C on yearly average) and also air temperatures recorded at 1300 UTC. "

"The differences on daily minimum air temperatures were negligible (−0.11 ∘ C on yearly average)"

"The bias appeared throughout the whole year but in particular during the warm season from May through October."

https://www.researchgate.net/publication


Daily maximum air temperatures by 0.54ºC yearly average
Daily minimum air temperatures by -0.11ºC yearly average
Throughout the whole year.

Are you on the sauce again?
Back to top
 
 
IP Logged
 
lee
Gold Member
*****
Offline


Australian Politics

Posts: 21673
Gender: male
Re: How does the Greenhouse effect work?
Reply #49 - Aug 27th, 2017 at 10:21pm
 
Jovial Monk wrote on Aug 27th, 2017 at 9:27pm:
Some molecules will re-emit the IR photon, as likely downwards as upwards, warming the surface.


All IR photons will be re-emitted. GHG's merely delay the IR photon. To say that they "trap" IR photons is a misnomer.

When the IR photons are re-remitted they are as likely to go in any direction.
Back to top
 
 
IP Logged
 
Jovial Monk
Gold Member
*****
Offline


Dogs not cats!

Posts: 51474
Gender: male
Re: How does the Greenhouse effect work?
Reply #50 - Aug 28th, 2017 at 3:38am
 
No, not all IR photons will be re-emitted.

When a GHG molecule absorbs an IR photon it gets excited and moves faster. It can “bump” into other molecules of gas, imparting some of its energy to those molecules, warming the atmosphere. In this case the photon would not be emitted.
Back to top
 

OzPolitic needs a >real< Environment MRB now!
OzPolitic needs a >real< Food MRB now!
OzPolitic needs a >real< Health MRB now!
OzPolitic needs a >real< Economics MRB now!

Topics in the right MRB!
 
IP Logged
 
Grendel
Gold Member
*****
Offline


OzPolitic

Posts: 28080
Gender: male
Re: How does the Greenhouse effect work?
Reply #51 - Aug 28th, 2017 at 12:56pm
 
Jovial Monk wrote on Aug 27th, 2017 at 9:13pm:
That .54 only occurs on some days, drongo. That is why they said not statistically significant.

NOT STATISTICALLY SIGNIFICANT....  the amount of WARMING over the last 18 years... Grin Grin Grin Grin Grin
Ask the IPCC.
Back to top
 
 
IP Logged
 
Jovial Monk
Gold Member
*****
Offline


Dogs not cats!

Posts: 51474
Gender: male
Re: How does the Greenhouse effect work?
Reply #52 - Aug 28th, 2017 at 1:26pm
 
Back on ignore roach goes.
Back to top
 

OzPolitic needs a >real< Environment MRB now!
OzPolitic needs a >real< Food MRB now!
OzPolitic needs a >real< Health MRB now!
OzPolitic needs a >real< Economics MRB now!

Topics in the right MRB!
 
IP Logged
 
lee
Gold Member
*****
Offline


Australian Politics

Posts: 21673
Gender: male
Re: How does the Greenhouse effect work?
Reply #53 - Aug 28th, 2017 at 3:02pm
 
Jovial Monk wrote on Aug 28th, 2017 at 3:38am:
No, not all IR photons will be re-emitted.

When a GHG molecule absorbs an IR photon it gets excited and moves faster. It can “bump” into other molecules of gas, imparting some of its energy to those molecules, warming the atmosphere. In this case the photon would not be emitted.



Citation needed. Wink
Back to top
 
 
IP Logged
 
Jovial Monk
Gold Member
*****
Offline


Dogs not cats!

Posts: 51474
Gender: male
Re: How does the Greenhouse effect work?
Reply #54 - Aug 28th, 2017 at 3:07pm
 
The paper talking about the HUGE IR window.
Back to top
 

OzPolitic needs a >real< Environment MRB now!
OzPolitic needs a >real< Food MRB now!
OzPolitic needs a >real< Health MRB now!
OzPolitic needs a >real< Economics MRB now!

Topics in the right MRB!
 
IP Logged
 
lee
Gold Member
*****
Offline


Australian Politics

Posts: 21673
Gender: male
Re: How does the Greenhouse effect work?
Reply #55 - Aug 28th, 2017 at 3:13pm
 
Jovial Monk wrote on Aug 28th, 2017 at 3:07pm:
The paper talking about the HUGE IR window.



But you said the HUGE window doesn't exist. Must be like your reference. Wink
Back to top
 
 
IP Logged
 
Jovial Monk
Gold Member
*****
Offline


Dogs not cats!

Posts: 51474
Gender: male
Re: How does the Greenhouse effect work?
Reply #56 - Aug 28th, 2017 at 3:24pm
 
You were the one talking GHz, large window and all that bullshit.

THAT paper.

And commonsense: a molecule that bumps into another molecule and shares its extra energy with it loses that energy.
Back to top
 

OzPolitic needs a >real< Environment MRB now!
OzPolitic needs a >real< Food MRB now!
OzPolitic needs a >real< Health MRB now!
OzPolitic needs a >real< Economics MRB now!

Topics in the right MRB!
 
IP Logged
 
Grendel
Gold Member
*****
Offline


OzPolitic

Posts: 28080
Gender: male
Re: How does the Greenhouse effect work?
Reply #57 - Aug 28th, 2017 at 3:41pm
 
Jovial Monk wrote on Aug 28th, 2017 at 1:26pm:
Back on ignore roach goes.

Won't help you I'll still post facts.
IPCC the Pause or Hiatus.
The IPCC
1 Recognise the pause is real
2 Admit their models never predicted it
3 State that the movement in temperatures during it are STATISTICALLY INSIGNIFICANT.


Ignore the FACTS all you like Monk, it just shows how much credibility YOU lack.

Oh and another reason YOU should never Mod... is because you'll have everyone on ignore. Cheesy Cheesy Cheesy Cheesy Cheesy
Back to top
 
 
IP Logged
 
lee
Gold Member
*****
Offline


Australian Politics

Posts: 21673
Gender: male
Re: How does the Greenhouse effect work?
Reply #58 - Aug 28th, 2017 at 4:19pm
 
Jovial Monk wrote on Aug 28th, 2017 at 3:24pm:
You were the one talking GHz, large window and all that bullshit.

THAT paper.

And commonsense: a molecule that bumps into another molecule and shares its extra energy with it loses that energy.



And so having lost its energy loses its sense of direction? Wink
Back to top
 
 
IP Logged
 
lee
Gold Member
*****
Offline


Australian Politics

Posts: 21673
Gender: male
Re: How does the Greenhouse effect work?
Reply #59 - Aug 28th, 2017 at 4:28pm
 
Ah, so you mean Harries et al?

Sorry to disappoint but it doesn't say anything about trapping CO2.

BTW - Found this piece from CO2 science org in realtion to Harries.

"What was done
Hoping to detect "changes in the earth's greenhouse effect," the authors analyzed the difference between the spectra of outgoing longwave radiation obtained by two orbiting spacecraft that looked down upon the earth at periods of time separated by a span of 27 years: NASA's Nimbus 4 spacecraft, which carried an Infrared Interferometric Spectrometer (1970), and Japan's ADEOS satellite, which carried an Interferometric Monitor of Greenhouse Gases instrument (1997).  The data utilized were obtained over a specific area in the central Pacific (10°N-10°S, 130°W-180°W) and a "near-global" area of the planet (60°N-60°S).  The data were further constrained by masking out land/island areas and areas believed to contain clouds."

"What it means
The conclusion as stated is somewhat misleading.  It does not provide direct experimental evidence for a significant increase in earth's greenhouse effect.  It does so only for the cloud-free part of the atmosphere located over a portion of the planet's oceans.  And for such circumstances, the authors' results are exactly what we would expect: over the 27 years in question, measured increases in the atmospheric concentrations of the gases mentioned should indeed have increased the greenhouse effect of the pristine cloudless atmosphere.

This finding, however, tells us nothing about earth's climatic response to the inferred increase in radiative forcing, which is what the climate change debate is all about, i.e., trying to evaluate the competing effectiveness of various positive and negative feedbacks that come into play when there is a small change in the radiative properties of the cloudless atmosphere.  In fact, the authors' finding is so rudimentary as to be essentially meaningless.  Assuming, for example, that their handling of their data is correct - and this is a huge assumption they spend over half their paper discussing - they have simply verified the definition of the greenhouse effect!"

http://www.co2science.org/articles/V4/N12/C1.php
Back to top
 
 
IP Logged
 
Pages: 1 2 3 4 5 6 
Send Topic Print