Main Menu
Google Search
Google
Current GWH News
Global Warming Hoax News From Around the Web

World Climate Report

» A Classic Tale of Global Warming Alarmism

» More Evidence Against a Methane Time Bomb

» Agriculture: Tropical Cyclones are Welcome Visitors

» Sea Level Acceleration: Not so Fast

» Hansen Is Wrong

» Earth’s Carbon Sink Still Strong and Growing

» Wild Speculation on Climate and Polar Bears

» Illiteracy at NASA

» The Heat Was On—Before Urbanization and Greenhouse Gases

» What’s to Blame for the Rains on the Plains?

***
NewsBusters - Global Warming

» CNN's Blitzer: 'I Don't Remember' Biden's Law School Plagiarism

» CNN's Chetry: 'Please Tell Me It's Not Lipstick Again'

» MRC Report Asks: Why No Fairness Doctrine for PBS?

***
Science and Public Policy Institute

» Forest Growth Responses to Increasing Temperatures

» Stop Climate Fear Mongering

» Was 2014 the Warmest Year on Record? No, It Wasn't...

» Problems with Model Predictions of Species Extinctions

» The Influence of C02 on Plant Antioxidants

» Health Effects of Hot vs. Cold Temperatures in Asia

» Coral Reef Responses to Temperature and Stress: Thermal Adaptation

» Forest Growth Response to C02

» Onward Marches the Great Pause

» Response of Various Marine Animals to Ocean Acidification and Warming

» FACE Experiments and Grassland Species

» Effects of Ocean Acidification on Fish

» Response of Fish to Ocean Warming

» Additional Grounds for Rejecting Biofuels

» The Global Medieval Warm Period

» Growth Rates of Old Versus Young Forest Trees

» Water Use Efficiency of Agricultural Species

» Tropical Trees

» Global Temperatures and Biospheric Productivity

» Rewriting Sunspot History

» Analysis of the Second Order Draft of the Working I Contribution to IPCC 5AR

» The Economics of Biofuels

» The Warming-Induced Evolution of Terrestrial Plants

» Medieval Warm Period in Southern Europe

» Effects of Elevated C02 on the Stomatal Conductance of Agricultural Crops

***
Climate Science: Roger Pielke Sr. Research Group

» Roger Pielke Sr. is now on Twitter!

» 2012 Climate Science Weblog in Review by Dallas Jean Staley – A Guest Post

» The Weblog Is Retiring

» Publication Of “Reply to “Comment On ‘Ocean Heat Content And Earth’s Radiation Imbalance. II. Relation To Climate Shifts’ ” by Nuccitelli Et Al. By Douglass and Knox 2012

» Q&A From A Group Of Retired NASA Personnel And Associates

» The Importance of Land Use/Land Practices On Climate – A Perspective From Jon Foley

» Interview With James Wynn In The English Department At Carnegie Mellon University

» University Of Alabama At Huntsville October 2012 Lower Tropospheric Temperature Analysis

» USA Election Day 2012

» New Paper “Climatic Variability Over Time Scales Spanning Nine Orders of Magnitude: Connecting Milankovitch Cycles With Hurst–Kolmogorov Dynamics” By Markonis And Koutsoyiannis

***


» Important New North American East Coast Proxy Data

» Ground-truthing Marcott

» More Mann Grafting

» Mann and the Legacy of “Bogus”

» One of Carvin’s Gaffes

» Oral Argument 2: EPA on “Fraud” Allegations

» Oral Argument 1: Context

» IPCC Lead Author and the Nazca Vandalism

» Reply to Laden and Hughes on Sheep Mountain

» “Unprecedented” Model Discrepancy

***
Watts Up With That?

» Pope Francis Apparently Doesn’t Know IPCC Climate Objective Contradicts Catholic Doctrine.

» Catastrophic Anthropogenic Vulcanology

» Greg Laden, and his ‘cowardly unethical asinine foolhardy pig-ignorant act’

» Saturday silliness – the BEST adjustments of temperature

» Time Magazine’s Jeffrey Kluger writes what might possibly be the stupidest article about climate ever – climate change causes volcanoes

» Friday Funny – for whom the bell Tols

» What are Your Fears about Global Warming and Climate Change?

» 87 Is The New 97

» A Sin Of Commission

» Claim: ‘global warming has been amplified in cities’, ignores infrastructure increase

» BEST practices step uncertainty levels in their climate data

» NSIDC Mark Serreze’s sea ice ‘death spiral’ no longer ‘screaming’ on the way down, now termed to be ‘erratic & bumpy’

***
Global Warming News

» Food vs. Fuel: Worse than We Thought?

» Update on Textgate, EPA’s Burgeoning Transparency Scandal

» No, Sen. Franken, Government Didn’t Make Fracking Happen

» EPA Proposal Desperately Seeks Seminole Rock Deference

» Energy Bullet Points: Obama Announces Alaska Anti-Energy Policy with Maudlin PSA; Best Yet Evidence against Iowa’s First-in-the-Nation-Presidential-Primary-Vote; and Much, Much More

» “Warmest Year” Blather – Distraction from Big Picture

» A Pictorial History of Political Regulations Promulgated by Obama’s EPA

» Blockbuster FOIA Production Exposes EPA’s PR Strategy for Climate Regs

» Weekend Media Review: No One Mentions Climate Change; Chris Wallace Calls out WH Chief of Staff for Energy Fib

» Green Missive Moves Up Economic Doomsday Clock to Three Minutes until Midnight

***
Fox News - Climate Change Stories

***
Michelle Malkin - Enviro-Nitwits

» Koch-a-geddon watch: Salon picks up slack for Harry Reid while he recovers

» Mayor of Bridgeport thanks Al Sharpton for ‘fighting the good fight’ against snow in January (I mean ‘climate change’)

» Al Gore and Pharrell are right, we need to take action against greenhouse gases — THEIRS

» Mitt Romney to make minor tweaks to climate change stance until he’s elected president

» You’ve entered The Hypocrisy Zone: Billionaire Democrat wants YOU to downsize your lifestyle

***
DailyTech Michael Asher`s blog

» Will the Real Antarctica Please Stand Up?

» Global Warming May Decrease Hurricanes, Research Suggests

» Japanese Report Disputes Human Cause for Global Warming

» Sea Ice Ends Year at Same Level as 1979

» A Funny Thing Happened on the Way to the (Climate) Forum

» Climate Report Downgrades Ice Loss; Media Reports Opposite

» Princeton Physicist Calls Global Warming Science "Mistaken"

» Defying Predictions, Sea Level Rise Begins to Slow

» Electric Car Sales in Freefall; Industry Risks Collapse

» Glaciers in Norway Growing Again

***
C3 - Climate Cycles Change

***
CATO - Global Warming

» Social Security Isn't Going Away -- But It Is Going to Get Worse

» Did Global Warming Juice Winter Storm Juno?

» Petrostates Have a Cheap Oil Malady

» Improving Educational Options for Georgia Children

» The Smart Way to Stop Illegal Immigration

» Watch out, America: Mexico May Be the Next Failed State

» Obama's Budget: Why Won't President Fix What Needs Fixing (Hint: Social Security, Medicare)?

» Border Surveillance Follies

» Do We Care about Prisoners in Solitary Confinement?

» Obama: Try Something New

» Ukraine's Conflict with Russia Isn't America's Fight, Part 2

» No, Mass Surveillance Won't Stop Terrorist Attacks

» Greeks Vote against Euro and European Union and for Home Rule and Democracy

» For Supreme Court Justices, Only the Law and the Constitution Should Matter

» Currency Manipulation and the Trans-Pacific Partnership: What Art Laffer, Fred Bergsten, and Other Hawks Get Wrong

» The President's Fictional Record

» How the GOP Wins in the Northeast

» Saudi Arabia as America's Frenemy: Obama to Visit 'Ally' Which Makes World More Dangerous

» Saudi Arabia: New Leader, Same Medieval State

» Washington and the World According to Mac Thornberry

» America's Frightening "Policing for Profit" Nightmare

» If You Like Higher Prices, Enriched Cronies, and Weak National Security, Then You’ll Love the Jones Act

» U.S. Should Stay Out of the Russo-Ukrainian Quarrel: Why the Conflict in Ukraine Isn't America's Business, Part I

» Fix Pensions with 'Buyback'

» The Hidden Costs of Monetary Mischief

***
CanadaFreePress - Global Warming

» Obama Administration To Advise Vatican On Climate Change Ahead Of Encyclical

***
More Global Warming Hoax News Feeds

---
Since Exxon Hasn't Sent Us Our First Million Dollars Yet You're Welcome To Help Pay Our Bills Until They Do.









Headlines

»‘Climate of Hate: His Children Are Urged To Kill Him’…UK Daily Mail’s David Rose Becomes Victim Of Vicious Hatred
»‘Hottest year’? ‘The margin of error is 0.1ºC. That is 5 times larger than the increment by which 2014 supposedly surpassed 2010′
Key Analysis: According to the Climatic Research Unit of the UK Met Office, the margin of error in e ...
»Warmists turning Mark Twain phrase on its head: ‘Everybody talks about the weather, but nobody does anything about it.’
Climate Depot comment: 'Warmists want to not only talk about the weather (hurricanes, tornadoes, flo ...
»NYT cites GOP voter who claims ‘A tree fell on my house’ due to global warming to hype new poll
American Thinker analyzes new NYT/Stanford poll: If the "statistics" didn't convince you, the New Yo ...
»Analysis of NYT/Stanford climate poll analysis: ‘Cook up a poll, produce results they like, and then use it as a club to make whatever they want’
American Thinker analyzes new NYT/Stanford poll: 'The New York Times has a breathless announcement:  ...
»Skewed poll: NYT doesn’t ask if people will pay to fight global warming — they won’t
»Which is it? Time Mag. goes both ways on volcanoes! TIME Mag.: ‘Climate Change Leads to Volcanoes’ – OR Flashback Time Mag 2014: ‘Volcanoes May Be Slowing Down Climate Change’
»Watch: Morano featured as villain in new warmist documentary: ‘Merchants of Doubt’
Marc Morano in warmist film: 'I am not a scientist, although I do occasionally play one on TV ...
»‘Anyone can be a prophet of doom: Pick a spot on the globe, any spot, and state with oracular authority that it will suffer most from runaway climate change’
»EPA Chief: The pope and Obama are in sync on climate change


Date published: Sun, 01 Feb 2015 16:26:34 +0000
Details

»The “Historic” Blizzard of 2015 Ranked #41
The numbers are in at the National Climate Data Center, and out of the top 55 snowstorms impacting t ...
»Super Snow Sunday Chicago
A vigorous low pressure tracking eastward from Colorado will intensify and bring up to a foot of new ...
»Northeast Snowstorms & Atlantic Water Vapor: No Connection in Last 27 Years
One of the theories of how snowstorms can be made worse is that warming oceans provide more moisture ...
»“Peak Food”? No, the Average Person Has More Food to Eat
There’s an article in yesterday’s Independent entitled, Have we reached ‘peak food ...
»New York City Gets a Taste of the Precautionary Principle
The New England blizzard that hit yesterday infamously missed its primary target: New York City. In ...
»About that Drone that Crashed at the White House…
With my photography hobby, I’ve been interested in the amazingly stable video that small quadc ...
»The Little Blizzard that Couldn’t
It was going to be epic. The worst evah. Two feet of snow or more for New York City with blizzard co ...
»3 Feet on Long Island? How Epic will this Snowstorm Be?
UPDATED 11 a.m. EST with GFS model forecast. There is no question the snowstorm just entering New En ...
»Monday Night’s Asteroid Passage the Closest/Largest in Next 12 Years
Tomorrow night an asteroid the size of a small mountain will pass about 3 Moon distances from the Ea ...
»How the Climate System Works (for Dummies)
No, I’m not talking about how the climate system has helped dummies make money off it. I’m taking th ...


Date published: Sun, 01 Feb 2015 12:57:52 +0000
Details

»Mistaking Cyclical Variations for the Trend
I titled my very first climate video “What is Normal,” alluding to the fact that climate ...
»Typhoons and Hurricanes
(Cross-posted from Coyoteblog) The science that CO2 is a greenhouse gas and causes some warming is h ...
»Those Who Follow Climate Will Definitely Recognize This
This issue will be familiar to anyone who has spent time with temperature graphs.  We can ask oursel ...
»Layman’s Primer on the Climate Skeptic Position
I am a “lukewarmer”, which means a skeptic that agrees that man-made CO2 is incrementall ...
»When Climate Alarmism Limits Environmental Progress
One of my favorite sayings is that “years from now, environmentalists will look back on the cu ...
»Why We Are Exaggerating “Extreme Weather”
I have written in article at Forbes.com called Summer of the Shark, Global Warming Edition.  It desc ...
»HydroInfra: Scam! Investment Honeypot for Climate Alarmists
Cross-posted from Coyoteblog. I got an email today from some random Gmail account asking me to write ...
»Presentation: The Science of the Skeptic Position
Here is the most recent version of my presentation “Don’t Panic: The Science of the Clim ...
»Switching Back to Disqus
For a variety of reasons, I had to turn off Disqus a while back.  We are going back to it for commen ...
»Reconciling Conflicting Climate Claims
Cross-posted from Coyoteblog At Real Science, Steven Goddard claims this is the coolest summer on re ...


Date published: Wed, 31 Dec 2014 15:45:50 +0000
Details

»Al Gore develops $90 trillion scheme to rebuild every city to get rid of cars
By Mark Whittington, examiner.com The World Economic Forum occurring in Davos, Switzerland, held to ...
»Mitt Romney Comes Out Of The Closet on Global Warming
By Elmer Beauregard At a time when most Republicans have realized the Global Warming is a hoax, Mitt ...
»Top Ten Reasons Climate Change is a Hoax
By Elmer Beauregard The Senate voted this week on whether Climate Change is real or a hoax, I think ...
»Senate Missed Huge Opportunity On ‘Hoax” Vote
By Elmer Beauregard Yesterday the Senate voted 98 to 1 that “Climate Change” is not a ho ...
»‘Hottest year’ hysteria a ploy to make us poorer
by Lorrie Goldstein, Toronto Sun Get ready for a year of climate change hysteria designed to make yo ...


Date published: Wed, 28 Jan 2015 22:39:37 +0000
Details

»Important New North American East Coast Proxy Data
One of my long-standing interests is the location of ocean sediment series that enable apples-to-app ...
»Ground-truthing Marcott
The MD99-2275 core offshore Iceland is a very high-resolution ocean sediment core, results of which ...
»More Mann Grafting
Jeff Norman draws attention to Figure 1 in a new Mannian tirade, a variation of Mann’s stump s ...
»Mann and the Legacy of “Bogus”
One of the most bizarre conclusions of D.C. Judge Combs-Greene were her findings that it was actiona ...
»One of Carvin’s Gaffes
In some recent posts, I’ve observed that Carvin made a couple of astonishing gaffes in his ora ...
»Oral Argument 2: EPA on “Fraud” Allegations
Towards the end of Carvin’s mostly cringeworthy rebuttal,  he seemed to score on EPA’s r ...
»Oral Argument 1: Context
I have an audio copy of the oral argument in Mann v Steyn, which I’ve posted up (see link at t ...
»IPCC Lead Author and the Nazca Vandalism
IPCC Lead Author Sven Teske, as alertly observed by Shub Niggurath, was one of the leaders of the va ...
»Reply to Laden and Hughes on Sheep Mountain
A couple of days ago, Greg Laden published a response from Malcolm Hughes to my recent Sheep Mountai ...
»“Unprecedented” Model Discrepancy
Judy Curry recently noted that Phil Jones’ 2014 temperature index (recently the subject of maj ...


Date published: Sat, 31 Jan 2015 22:29:17 +0000
Details

»Forest Growth Responses to Increasing Temperatures
It has been claimed that CO2-induced global warming will be so great and so rapid that many of Earth ...
»Stop Climate Fear Mongering
The massively funded international global warming movement has grossly exaggerated the threat from C ...
»Was 2014 the Warmest Year on Record? No, It Wasn't...
Nature trumpets “2014 was the hottest year on record,” citing the Japan Meteorological Agency, the W ...
»Problems with Model Predictions of Species Extinctions
The world's climate alarmists contend that CO2-induced global warming will lead to numerous extincti ...
»The Influence of C02 on Plant Antioxidants
Environmental stresses induced by exposure to pollutants, drought, intense solar radiation and high ...
»Health Effects of Hot vs. Cold Temperatures in Asia
Climate alarmists predict global warming will increase human death rates, and nary a heat wave occur ...
»Coral Reef Responses to Temperature and Stress: Thermal Adaptation
As living entities, corals are not only acted upon by the various elements of their environment, the ...
»Forest Growth Response to C02
By examining various properties of tree rings, researchers can deduce how historical increases in th ...
»Onward Marches the Great Pause
Since October 1996 there has been no global warming at all (Fig. 1). This month’s RSS temperature pl ...
»Response of Various Marine Animals to Ocean Acidification and Warming
Most of the ocean acidification research conducted to date has focused solely on the biological impa ...


Date published: Sun, 01 Feb 2015 17:57:39 +0000
Details

»Sydney enjoys coldest Australia Day for 58 years
Of course you are seeing this in MSM headlines? Yesterday Sydney barely struggled above 20°C on Aust ...
»How much longer will the Abbott Government allow the Bureau of Meteorology to damage itself by keeping on crying wolf about ordinary very hot spells
There we go again – BoM predictions of heat records – Weather records set to tumble with ...
»BoM calls a hottest day ever record temperature in Alice Springs 4.5°C above reality
How could professional met people make such a huge mistake? BoM withdraws advice Alice Springs recor ...
»Temperature anomaly maps for France show recurring anomalies from year to year
A reader has sent in these maps observing some features live on from year to year. “Compared t ...
»We are living in a [censored] of a warm period compared to Roman and Medieval times
Great review by Dr Craig Idso highlighting new Chinese research – over at ICECAP
»NASA Goddard Institute for Space Studies (GISS) claiming 2014 was the hottest year ever does not deserve creedence
Global media swoon over the dodgy claim by GISS that 2014 was hottest evah. GISS have a rich traditi ...
»Australian Bureau of Meteorology fails to repair their flagship ACORN temperature dataset as the Director of Meteorology expected
In May 2014 I got a reply from Dr Rob Vertessy, Director of the BoM – to my pointing out that ...
»Bureau of Meteorology Outlook for January rain looks sick after 10 days
Recently the BoM started including monthly Outlook maps – not sure why but there you go. The D ...
»Graziers forced off Mount Morris Station near Charleville – carbon farming is part of the financial issue
Last May I tried to get a grip on the circumstances at Mount Morris Station – News from the wo ...
»Rain warnings and bushfire news for Adelaide Hills at exact same time
The BBC is carrying – South Australia fires: Hopes rise of halting Adelaide blaze – I th ...


Date published: Tue, 27 Jan 2015 03:26:43 +0000
Details
Latest Forum Posts
Posted by Anonymous
nice post
01/16 02:00

Posted by Hazel Perry
Great examine post! That’s most significant detai[more ...]
01/16 01:59

Posted by Anonymous
Great examine post! That’s most significant detai[more ...]
01/16 01:58

Posted by Anonymous
Admired writing skill! This article is honestly a [more ...]
01/05 03:29

Posted by Anonymous
Studying this info! From the beginning to the end,[more ...]
01/05 03:22

Posted by Anonymous
Peer Reviewed Hoax Busting Studies Kristen Byrnes[more ...]
12/01 02:44

Posted by Anonymous
I've learn all the posts and i discovered very uni[more ...]
11/27 01:55

Posted by Melantha 
  It is already August, the day of Cheap FIFA 15 C[more ...]
11/14 23:16

Posted by  The statement is a
  /  The other week, we saw the top player ranking[more ...]
10/01 02:26

Posted by Anonymous
Search AGWunveiled to discover the two drivers tha[more ...]
08/18 07:00

Relevant Sponsors

Donations
Any Amount helps support improvements





* or *


Advertise on this site

Road Gear

License Plate Frames
Support the Truth

Skeptic License Plate Frame
"SKEPTIC"

It's Natural License Plate Frame
"It`s Natural"

Liberty License Plate Frame
"Liberty"

* MORE *
Strong and durable metal license plate holder. Uses full color high resolution images. UV and Water Protection. Satisfaction Guaranteed
RSS Feeds
Our news can be syndicated by using these rss feeds.
rss1.0
rss2.0
rdf
Welcome
Username:

Password:


Remember me

[ ]
[ ]
Mobile Version
e107mobileYou can now visit us on your mobile phone! Simply goto http://GlobalWarmingHoax.com on your mobile phone or PDA to get started!

Debunking the CO2 Feedback Myth - by Leonard Weinstein, ScD
Admin, Thursday 14 May 2009 - 16:27:59 // comment: 1 //     printer friendly   //     Font Size - Increase / Decrease / Reset

The climate models used in the IPCC reports have made predictions of increases in global temperature of 2ºC to 6ºC over present levels by 2100. These predictions were based on assumptions regarding future CO2 levels and that water vapor would provide a large positive feedback effect. Dr. Weinstein (former NASA Senior Research Scientist) shows how both of these assumptions are either wrong or greatly exaggerated. No Longer Supported

Debunking the CO2 Positive Feedback Myth

Leonard Weinstein, ScD
May 11, 2009



Introduction:

The climate models used in the IPCC reports have made predictions of increases in global temperature of 2ºC to 6ºC over present levels by 2100. These predictions were based on two assumptions:

  1. The atmospheric CO2 level would go from 290ppm in about 1850 to at least 580ppm in 2100.
  2. The increase in CO2 would have both a direct greenhouse gas effect, and trigger a positive feedback effect. The result would be a small direct increase in temperature from the CO2 , but the increased temperature would also result in an increase in water evaporation. The water vapor is the major greenhouse gas in the atmosphere, and its increase would further increase temperature, resulting in a positive feedback until the process self-limited at a significantly higher level.

The predicted direct CO2 effect is estimated to be about 1C for the doubling of CO2 level. The present level of about 388ppm would have already caused about half of the direct rise, since the effect is nonlinear. The global temperature has apparently increased by about 0.7ºC in the last 150 years, which is slightly more than the estimated direct CO2 effect, but far short of the expected feedback imposed value. In addition, the temperature level up to about 1850 was significantly lower than typical levels during the last several thousand years. Much of the period between about 1200 to 1850 has in fact been called the “Little Ice Age”. The abnormal low temperature starting point for the change makes the distinction between natural temperature rise due to a recovery from the abnormally low temperature to the present difficult to separate from CO2 and positive feedback induced increases. The CO2 increase was small until about 1940, so the positive contribution from the CO2 is based on an even smaller maximum temperature increase (about 0.3ºC) and a shorter time. All of these facts indicate that calculations of any CO2 effects and positive feedback additions would have badly missed the actual present temperature if we did not already know it.

The proposed solution to the discrepancy by the IPCC is that sulfate gas and particulate pollution from burning fossil fuels, have caused atmospheric “Global Dimming”, which greatly inhibited the correct level of warming. While this cannot be totally refuted, it is not specifically supportable either. Since the need for a strong positive feedback is needed to support the projections for the temperature rise to 2100, the mechanism for such a rise is examined.


Proposed mechanism for glacial to interglacial temperature increases:

It is very likely that over the last several hundred thousand years, axial tilt and precession in the Earth’s orbital motion (Milankovitch cycles). have triggered the transitions from glacial conditions (lasting about 100,000 years) to the significantly warmer inter-glacial periods (lasting 10,000 to 20,000 years) During the glacial cycles massive spreads of glaciers and ocean ice formed over large regions at higher latitudes, and the average Earth temperature was significantly lower than for the inter-glacial periods. The increase of average Solar insolation that occurred due to these orbital variations is not nearly sufficient to directly explain the rapid increase in global temperature, and the rapid melting of much of that ice. The variation has to have been triggered more by the change in distribution of the Solar insolation on the surface. However, once the transition was triggered, it has been hypothesized that some forms of positive feedback amplified the increase in temperature.

The most likely form of the initial trigger was due to local increases in ocean temperature in higher latitudes causing some of the marginal ocean ice to melt, and the increased absorption from the increased ocean area resulting in additional ocean absorption of Solar energy. This positive feedback was probably limited due to the small level of direct increased warming. However, the increased area of ocean and slight increased temperature also caused the water vapor pressure to slightly increase. Since water vapor is a strong greenhouse gas, this led to further temperature increases, resulting in a strong positive feedback. The increasing ocean temperature eventually resulted in large amounts of CO2 to be released, since the solubility of the water to CO2 is lower at higher temperature, and the oceans hold the vast majority of ocean+air CO2 . It appears that the large increase in CO2 lagged the overall increasing surface temperature by about 800 years or so. It is then proposed by some that the increased greenhouse effect, due to the increasing CO2 level, supercharged the positive feedback by resulting in more heating. This additional heating then released more water vapor, and the positive feedback then took off until some mechanism stopped the process (possibly cloud formation).


Present conditions and additional heating:

The present total greenhouse effect from water vapor, CO2, Methane, and other greenhouse gases is estimated to make the surface 33ºC warmer than a surface without greenhouse gases. The direct contribution from the CO2 is estimated to be about 2ºC. All greenhouse gases other than water vapor are estimated to be about 3ºC. Why would a small amount of CO2 , or all other gases than water vapor cause more of a positive feedback for heating that that due to the water vapor itself? If there is positive feedback from just the initial forcing, it would not require CO2 to do something strange, the water vapor would do it (i.e., heating causes more water vapor, which causes more heating, etc.).

Also, since water vapor is the main greenhouse gas, positive feedback would make an unstable system unless there was some mechanism that halted runaway conditions. It is likely that increased cloud formation, or even a haze condition caused by the water vapor, would decrease the effective Solar insolation so that a stable temperature is reached. Any increase in any greenhouse gas with changes small compared to the existing total would be self-limited by the water vapor limiting properties. The fact of a self-limiting process for this type of feedback can be seen by the following example. During a hot summer, the total water vapor content is much higher than for a cold winter. If there were no self-limiting mechanism, this would result in a runaway condition, which is not observed.

There is one way the small direct temperature increase from the CO2 could trigger a positive feedback (of limited scope). That would be if the small direct increase were world wide, and significantly decreased total global ice cover on the oceans. The total yearly average of the extent of ocean ice has only been measured for a few decades, and even though it has recently decreased somewhat, the present net effect is that less than 0.3 percent of the Earth’s surface has been exposed to a lower albedo (and thus higher absorption of energy), and this is at locations of very low Solar insolation. Most of even this ice area change is probably due to the natural variation, but the net change of absorbed energy is not sufficient to make a significant difference even if most of it was due to the CO2 increase. In addition, the melted area is now decreasing as we go into a multi-year cooling period. Historical records indicate this slight variation is not unusual over several decadal cycles.


Conclusion:

Since water vapor is by far the largest greenhouse gas on the Earth, and since the Earth is mostly water covered, it is easy to see why the response of water to perturbations in the level and distribution of Solar insolation would be most important in the shift from glacial ages to interglacial periods. Reasonable arguments can be made for a strong positive feedback of water vapor to explain the rapid temperature increase during the transition. It is clear that such feedbacks are self-limiting, since the increase stops. However, the possible claim that the much smaller CO2 contribution, which even lags the sharp initial rise by many years, can then cause an even stronger positive feedback defies logic.

A recent significant increase of CO2, possibly with a large anthropogenic input, still results in a total less than 7% of the atmospheric greenhouse gas effect. Only about 1/3 of that is in the increase over the claimed "natural" levels. It is posited that this can somehow override the water vapor self-limiting mechanism by triggering a small increase in temperature to thus release more water vapor and supercharge a temperature rise to several times the direct effect of the CO2 itself. Since the self-limiting mechanism for the water vapor is present, this does not follow logically. Actual temperature changes have many drivers, but CO2 does not appear to be a significant driver at the levels or variations in levels present, and certainly can't have the amplifying effect claimed.

Click here for a brief Bio of Leonard Weinstein, ScD




Reprinted here with the permission of Leonard Weinstein, ScD


Share or Bookmark this Article Using:
| furl furl | reddit reddit | del.icio.us del.icio.us | magnoliacom magnoliacom | digg digg | newsvine newsvine | Stumble_it Stumble_it | Facebook Facebook | Google Google | Fark Fark | Sphere Sphere | Netscape Netscape | Technorati Technorati | Yahoo! Yahoo! | Add to Favorites and Additional Bookmarks: Share GlobalWarmingHoax.com - Where the Truth Heats Up





Latest Forum Posts


Threads: 2105 | Replies: 818 | Views: 5300714
Translate to: French German Italian Spanish Portuguese GTM_LAN_DUTCH Russian Chinese Arabic Korean English