Category Archives: feedbacks

Study: irrigation causes ‘significant cooling of global average surface temperatures over land’

From the HockeySchtick: A paper published last week in Climate Dynamics finds man-made agricultural irrigation “causes significant cooling of global average surface air temperatures over land and dampens regional warming trends” by increasing cloud cover and precipitation. According to the … Continue reading

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Posted in feedbacks | 49 Comments

Nature abhors a positive feedback

Negative Feedback Prevents Harmful Temperatures from Carbon Dioxide Guest essay by Bryce Johnson The purpose of the article is to contribute to refuting the false alarm that has been generated worldwide about excess global warming caused by atmospheric carbon dioxide, … Continue reading

Posted in Carbon dioxide, feedbacks | 113 Comments

New paper: man-made aerosols have had a net cooling effect since beginning of industrial revolution

More aerosols, means more clouds, which means cooler temperatures. Now that we are cleaning up aerosols worldwide, this may explain why the Earth is getting slightly warmer – more sunlight reaches the surface A paper published today in Science claims … Continue reading

Posted in Aerosols, clouds, feedbacks | 52 Comments

The 2014/15 El Niño – Part 10 – June 2014 Update – Still Waiting for the Feedbacks

This post provides an update on the progress of the early evolution of the 2014/15 El Niño with data through the end of May 2014. The post is similar in layout to the May update. The post includes 5 gif … Continue reading

Posted in El Nino Basics, ENSO, feedbacks | 65 Comments

Soil microbe GHG feedback ‘less dire than previously thought’

From the International Institute for Applied Systems Analysis The tiniest greenhouse gas emitters Climate feedbacks from decomposition by soil microbes are one of the biggest uncertainties facing climate modelers. A new study from the International Institute for Applied Systems Analysis … Continue reading

Posted in feedbacks, Modeling | 30 Comments

When will climate feedbacks fully function? Not for millennia

 Guest essay by Christopher Monckton of Brencheley The splendidly-titled Alberto Zaragoza Comendador, commenting on my recent posting taking apart Mr. Mann’s latest fantasia in Scientific American, was startled by my statement that only half of equilibrium global warming would emerge … Continue reading

Posted in Climate sensitivity, feedbacks | 156 Comments

Observing water vapor feedback during ‘the pause’

From AGU highlights, measurements from 2002 to 2009 show short term feedback still subject to short-term climate variability, long term feedback still in the realm of models. Measuring the effect of water vapor on climate warming Water vapor is a … Continue reading

Posted in feedbacks, Hiatus in Global Warming | 77 Comments

Pollen has bigger influences on optical properties of the atmosphere than previously known

From Leibniz-Institut für Troposphärenforschung something that could be a possible negative feedback to CO2. As plants proliferate more due to increased CO2, it follows that pollen load in the atmosphere would also increase. Laser measurements show: pollen has considerable influence … Continue reading

Posted in Aerosols, feedbacks | Tagged , , | 46 Comments

Sea Ice Page Upgrades, Observations and Questions

By WUWT regular “Just The Facts” In making a couple upgrades to the Sea Ice Page, I made a few observations, and a few questions arose. Firstly, several weeks ago the following exchange occurred on a Sea Ice News thread: … Continue reading

Posted in Arctic, feedbacks, Land use land cover change, Oceans, Sea ice, Sea Surface Temperature, Temperature | Tagged , , , , , | 125 Comments

Forcing or Feedback?

Guest Post by Willis Eschenbach I read a Reviewer’s Comment on one of Richard Lindzen’s papers today, a paper about the tropics from 20°N to 20°S, and I came across this curiosity (emphasis mine): Lastly, the authors go through convoluted … Continue reading

Posted in Albedo, clouds, feedbacks, Peer review | Tagged , , | 87 Comments

Crowdsourced Climate Complexity – Compiling the WUWT Potential Climatic Variables Reference Page

By WUWT regular “Just The Facts” With the help of an array of WUWT reader comments, which began on this thread on January, 15th 2011, and grew on January 22nd, 2011, February 10th, 2011, February 28th, 2011, June 30th, 2011 … Continue reading

Posted in AMO, Announcements, Antarctic, Arctic, Carbon dioxide, Carbon sequestration, Citizen science, Climate data, clouds, Cosmic rays, dust storms, Earth, Education, Energy, ENSO, Environment, feedbacks, flooding, Forecasting, geothermal energy, Global warming, hurricanes, Land use land cover change, lightning, measurement, Methane, Modeling, Oceans, PDO, Science, Sea ice, snowfall, Temperature, tornadoes, UHI, Weather | Tagged , , , , , , , , | 132 Comments

The Ridiculousness Continues – Climate Complexity Compiled

By WUWT regular “Just The Facts” With the help of an array of WUWT reader comments on this thread and several others documented within, I’ve been compiling a summary of all potential climatic variables in order to build a conceptual … Continue reading

Posted in Aerosols, AMO, Antarctic, Arctic, Climate data, clouds, Cosmic rays, dust storms, Earth, Earthquakes, Energy, ENSO, feedbacks, geothermal energy, Gravity, hurricanes, Methane, Oceans, PDO, petroleum, Science, Sea ice, Snow, Solar, solar power, thorium power, tornadoes, wind power | Tagged , , , , , , , , , , | 266 Comments

The Unknown Unknowns of Global Warming

Plants, both through decay and respiration, are responsible for over half of the world’s annual carbon dioxide emissions. I mention this fact for one reason and that is to communicate the power of the biosphere upon the atmosphere. Usually, when … Continue reading

Posted in Carbon dioxide, Climate sensitivity, feedbacks, Modeling | Tagged , | 60 Comments

Pielke Sr. on new Spencer and Braswell paper

Reposted from Dr. Roger Pielke Sr’s blog New Paper “On the Misdiagnosis Of Surface Temperature Feedbacks From Variations In Earth’s Radiant Energy Balance” By Spencer and Braswell 2011 There is a new paper published which raises further questions on the robustness … Continue reading

Posted in Climate reconciliation, feedbacks, Modeling | Tagged , , , | 203 Comments

Uncertain Climate Risks (Nature Climate Change)

Guest Post by Ira Glickstein As I continue to plow through Vol 1 Issue 1 of the new Journal Nature Climate Change, I came to the following amazing statement: Communicating the value of climate modelling … requires confronting such apparent … Continue reading

Posted in Climate_change, clouds, feedbacks, IPCC, Modeling, Politics, Science, Uncategorized | Tagged , , , , | 153 Comments

Icebergs, phytoplankton, and CO2 – negative feedback

Via Lewis Page at the Register: Some cheerful news on the climate change front today, as US government boffins report that ice breaking off the Antarctic shelves and melting in the sea causes carbon dioxide to be removed from the … Continue reading

Posted in Antarctic, Carbon dioxide, feedbacks, Sea ice | Tagged , , | 70 Comments

Visualizing the “Greenhouse Effect” – Atmospheric Windows

Guest post by Ira Glickstein A real greenhouse has windows. So does the Atmospheric “greenhouse effect”. They are similar in that they allow Sunlight in and restrict the outward flow of thermal energy. However, they differ in the mechanism. A … Continue reading

Posted in Climate sensitivity, Earth, feedbacks, Uncategorized | Tagged , , | 489 Comments

Normal Seasons of the Sun (GW Tiger)

Guest post by Ira Glickstein PhD. We had joy, we had fun, we had Seasons of the Sun. But the mountains we climbed were but whimsies of our minds. That song (apologies to Terry Jacks) could well be the theme … Continue reading

Posted in Aerosols, Carbon dioxide, Climate data, Climate_change, ENSO, feedbacks, NASA GISS, Solar, Uncategorized | Tagged , , , , | 152 Comments

The Dessler Cloud Feedback Paper in Science: A Step Backward for Climate Research

How’s this for “rapid response“? This rebuttal comes out at exactly the same time the press embargo lifts in Science. We were able to obtain advance copies of the Dessler paper, plus Dr. Spencer had seen it as a poster … Continue reading

Posted in Climate News, ENSO, feedbacks, Science | Tagged , , , | 124 Comments

Is the warming in the 20th century extraordinary?

WUWT readers, Figure 4 is noteworthy, because it points out the trend of 20th century warming in context with other periods of warming derived from the ice core record. I suggest you bookmark this post and that graph, as it … Continue reading

Posted in Carbon dioxide, feedbacks, IPCC, Paleoclimatology | Tagged , , , , | 125 Comments

Clouds: The Wild Card of Climate Change

I guess they really don’t have a full handle on the science and consensus after all. NSF Releases Online, Multimedia Package Titled, “Clouds: The Wild Card of Climate Change” Reader-friendly multimedia package covers the crucial but enigmatic role of clouds … Continue reading

Posted in feedbacks | 116 Comments

Spencer on water vapor feedback

Five Reasons Why Water Vapor Feedback Might Not Be Positive By Dr. Roy Spencer Since it has been a while since I have addressed water vapor feedback, and I am now getting more questions about it, I thought this would … Continue reading

Posted in Climate sensitivity, feedbacks | 85 Comments