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?

***

***

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

***


» Centenary of the End of the Battle of the Somme

» The Destruction of Huma Abedin’s Emails on the Clinton Server and their Surprise Recovery

» Was early onset industrial-era warming anthropogenic, as Abram et al. claim?

» Re-examining Cook’s Mt Read (Tasmania) Chronology

» Esper et al 2016 and the Oroko Swamp

» Gergis and Law Dome

» Joelle Gergis, Data Torturer

» Gergis

» Are energy budget TCR estimates biased low, as Richardson et al (2016) claim?

» Deflategate: Controversy is due to Scientist Error

***

***

Global Warming News

» SJW-day at COP22

» Clean Power Plan: EPA’s Updated Base Case Now Tallies with EIA Data

» Clean Power Plan Oral Argument Transcript Available Here!

» President Obama and Chinese President Xi will officially join the Paris Climate Treaty on 3rd September

» South China Morning Post reports: China and US to ratify landmark Paris climate deal ahead of G20 summit, sources reveal

» Posting: Little-Known Documents Pertinent to Assessing the Legality of EPA’s Clean Energy Incentive Program

» Kyoto-Financed Cook Stoves Fail as Health/Climate “Intervention”

» CEQ Finalizes NEPA Guidance for Greenhouse Gases: Will Pointless Keystone XL Controversy Become ‘New Normal’?

» Democratic Platform Vows To Meet Climate Challenge with Good-Paying Jobs, Cheaper Energy from Green Sources, and National Mobilization

» Cognitive Dissonance Among Elected Climate Alarmists

***

***


***


***


***


***


***

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

»Exclusive Video: People’s Climate March hostile to skeptics – Attempts to take down signs, deny access
Watch Exclusive Video of marchers trying to interfere with skeptical banner.  Morano on marchs' trea ...
»GLOBAL TEMPERATURES PLUNGE NEARLY 1 DEGREE F IN APRIL
»Skeptics Attend People’s Climate March With New Report & Billboards – Denied Media Credentials
Update: Exclusive Video: People’s Climate March hostile to skeptics – Attempts to take down si ...
»Climate march in Denver to feature a ‘die in’: ‘People wearing black will lay on the ground as if they are dead’
»Cheers! On eve of climate march, EPA removes climate change page from website
»Up to 2 Foot Snow Blast Putting ‘Global Warming’ Protests On Ice In Colorado
Gore Effect: The threat of a major snowstorm is already putting Denver-area climate marches on ice. ...
»Gore, DiCaprio to descend on DC to protest Trump on ‘global warming’
»People’s Climate March on Saturday — through Snow!? Spring snowstorm may hit sister marches in West
»Trump Hints White House Might Stay In UN Paris Climate Deal If Renegotiated
»Mark Levin: Here’s Proof Obama Administration LIED To Us About Climate Change ‘To Advance An Ideology’


Date published: Sun, 30 Apr 2017 13:55:20 +0000
Details

»People’s Climate March on Saturday…through Snow
You would think that since it’s almost May that one could plan a march against global warming ...
»UAH Shooting Investigation Update, and Thanks
John Christy met with the chief of police at UAH today, and I’m happy to report that, contrary ...
»Update on Possible Ecoterror Attack at UAH
Ecoterrorism. Eco-terrorism is defined by the Federal Bureau of Investigation as “the use or t ...
»Shots Fired into the Christy/Spencer Building at UAH
A total of seven shots were fired into our National Space Science and Technology Center (NSSTC) buil ...
»Time Lapse of Asteroid 2014 JO25
Despite some clouds, I was able to capture time lapse video of Asteroid 2014 JO25 passing by last ni ...
»Half-mile Wide Asteroid Close Approach on Wednesday
An asteroid capable of destroying Washington D.C. and New York City at the same time will be making ...
»Why United is in Legal Trouble Over Removing a Passenger
By now, most people have heard of the passenger on a United Express flight that was bloodied and for ...
»UAH Global Temperature Update for March, 2017: +0.19 deg. C
The Version 6.0 global average lower tropospheric temperature (LT) anomaly for March, 2017 was +0.19 ...
»Trump’s Rollback of EPA Overreach: What No One is Talking About
President Trump’s actions yesterday to rein in the EPA on a number of fronts involves the usua ...
»The Global Warming Debate Spectrum
In the debate arena, the public likes simple narratives. If the narrative supports their pre-conceiv ...


Date published: Fri, 28 Apr 2017 17:27:30 +0000
Details

»My Climate Plan, Wherein a Climate Skeptic Actually Advocates for A Carbon Tax
I am always amazed at how people like to draw conclusions about what I write merely from the title, ...
»Come See My Climate Talk on Wednesday Evening, February 24, at Claremont-McKenna College
I am speaking on Wednesday night at the Athenaeum at Claremont-McKenna College near Pomona on Wednes ...
»US Average Temperature Trends in Context
Cross-posted from Coyoteblog. There was some debate a while back around about a temperature chart so ...
»Revisiting (Yet Again) Hansen’s 1998 Forecast on Global Warming to Congress
I want to briefly revisit Hansen’s 1998 Congressional forecast.  Yes, I and many others have c ...
»Matt Ridley: What the Climate Wars Did to Science
I cannot recommend Matt Ridley’s new article strongly enough.  It covers a lot of ground be he ...
»Manual Adjustments in the Temperature Record
I have been getting inquiries from folks asking me what I think about stories like this one, where P ...
»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 ...


Date published: Fri, 18 Mar 2016 16:20:20 +0000
Details

»Hearing- Climate Science: Assumptions, Policy Implications, and the Scientific Method
Dr. Judith Curry President, Climate Forecast Applications Network; Professor Emeritus, Georgia Insti ...
»EPA chief Scott Pruitt says carbon dioxide is not a primary contributor to global warming
CNBC.com Environmental Protection Agency Administrator Scott Pruitt said Thursday he does not believ ...
»Elmer’s PowerPoint Presentation – Confessions of a Graphic Designer
By Elmer Beauregard I decided to put part of my PowerPoint presentation online. As a Graphic designe ...
»Exposed: How world leaders were duped into investing billions over manipulated global warming data
By Daily Rose, DailyMail.com The Mail on Sunday today reveals astonishing evidence that the organisa ...
»Climate Fraud Exposed: CO2 doesn’t rise up, trap and retain heat
Written by John O’Sullivan, principia-scientific.org We have been lied to: Carbon dioxide (CO2 ...


Date published: Wed, 29 Mar 2017 14:46:08 +0000
Details

»Centenary of the End of the Battle of the Somme
November 18 marks the centenary of the end of the Battle of the Somme, an event that passed essentia ...
»The Destruction of Huma Abedin’s Emails on the Clinton Server and their Surprise Recovery
Despite extraordinarily intense coverage of all aspects of Hillary Clinton’s emails, all comme ...
»Was early onset industrial-era warming anthropogenic, as Abram et al. claim?
A guest post by Nic Lewis Introduction A recent PAGES 2k Consortium paper in Nature, Abram et al., t ...
»Re-examining Cook’s Mt Read (Tasmania) Chronology
In today’s post, I’m going to re-examine (or more accurately, examine de novo) Ed Cook ...
»Esper et al 2016 and the Oroko Swamp
Jan Esper, prominent in early Climate Audit posts as an adamant serial non-archiver, has joined with ...
»Gergis and Law Dome
In today’s post, I’m going to examine Gergis’ dubious screening out of the Law Dom ...
»Joelle Gergis, Data Torturer
In 2012, the then much ballyhoo-ed Australian temperature reconstruction of Gergis et al 2012 myster ...
»Gergis
redirect to here
»Are energy budget TCR estimates biased low, as Richardson et al (2016) claim?
A guest post by Nic Lewis   Introduction and Summary In a recently published paper (REA16), Mar ...
»Deflategate: Controversy is due to Scientist Error
I’ve submitted an article entitled “New Light on Deflategate: Critical Technical Errors ...


Date published: Thu, 27 Apr 2017 07:24:59 +0000
Details




Date published: not known
Details

»Welter of legal claims on New Zealand coast and seas by Maori organizations
I got an email about the large number(~55) of these Public Notices in the NZ Herald relating to coas ...
»AEMO forecasts large cut in the electricity spot price on 1st May
Checkout AEMO Price and Demand charts. I kept screen shots – NSW, Qld, Vic, SA all showing a g ...
»Why is AEMO electricity price for Tasmania rocketing?
I have been watching my 5 States chart and the rise in AEMO wholesale price for Tasmania since Feb p ...
»Saga of lead in Perth Children’s Hospital water supply
The ABC reports – Perth Children’s Hospital (PCH) lead contamination in water pipes supp ...
»Most Ivanpah power comes from natural gas
I had not heard much about the Ivanpah Solar Power Facility for a while – no wonder – Re ...
»ABC ignores rain history
This story from near Longford in Tasmania makes out rain for June 2016 was due to “climate cha ...
»Not every day Australia is threatened with a nuclear strike
Here is what the NORK Foreign Ministry spokesman said. While checking headlines at KCNAWATCH I was d ...
»No global warming at Mawson – Antarctic
Just for curiosity – data from BoM CDO – 1955-2016 61 years. Excel says cooling at 0.003 ...
»Pay the Financial Times to read fake news
We all saw these stories featuring aerial photos purporting to show coal spills from Abbott Point af ...
»Is there a plan to get housing out of flood zones
So many towns include areas built too near rivers – it seems amazing in 2017 we are distracted ...


Date published: Sun, 30 Apr 2017 02:22:23 +0000
Details
Latest Forum Posts
Posted by davidbell
Incredimail recovery program efficiently recovers [more ...]
04/29 06:03

Posted by joanandersens
These days, there is no lack of email applications[more ...]
04/29 00:42

Posted by emilybronte
Better VHD Data Recovery software is great solutio[more ...]
04/28 05:04

Posted by Norman Ryan
And here is an awesome online tool for jpg to png [more ...]
04/27 05:49

Posted by Anonymous
If you're looking for a free solution, you should [more ...]
04/27 02:56

Posted by Anonymous
Try reliable and cost-effective third party OST to[more ...]
04/27 01:37

Posted by Anonymous
Here you can also take help from third party OST t[more ...]
04/26 06:11

Posted by Norman Ryan
Hello! I would like to suggest a tool for jpg to p[more ...]
04/25 03:03

Posted by Anonymous
To get rid of Outlook PST error issues, you can us[more ...]
04/24 04:05

Posted by Anonymous
An excellent OST to PST Converter utility which pe[more ...]
04/24 01:32

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: 2188 | Replies: 1132 | Views: 7504005
Translate to: French German Italian Spanish Portuguese GTM_LAN_DUTCH Russian Chinese Arabic Korean English