Category Archives: clouds

Stunning Frontal Cloud at Sea

I thought readers might enjoy this photo. This frontal cloud formed from a northeast wind shift and lifting of humid ocean air enough to cool it below the dew point. The cold air acts a bit like the leading edge … Continue reading

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Posted in clouds, Weather | 33 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

Tweaking the climate models: Researchers show emissions from forests influence very first stage of cloud formation

Clouds are the largest source of uncertainty in present climate models. Much of the uncertainty surrounding clouds’ effect on climate stems from the complexity of cloud formation. New research from scientists at the CLOUD experiment at CERN, including Carnegie Mellon’s … Continue reading

Posted in clouds, Modeling, Weather | 67 Comments

Noctilucent clouds on the increase, climate change will likely be blamed

Of course, it might just be a negative feedback at work. From NASA: Appearance of Night-Shining Clouds Has Increased First spotted in 1885, silvery blue clouds sometimes hover in the night sky near the poles, appearing to give off their … Continue reading

Posted in clouds, Optical phenonmena, Weather | 35 Comments

We don’t know clouds

Too many variables like clouds to model future climate with precision Guest essay by Rolf Westgard A new United Nations report suggests an imminent danger from global warming. It states that without drastic action we may have “to develop the … Continue reading

Posted in clouds, Modeling | 82 Comments

Picture of how our climate is affected by greenhouse gases is a ‘cloudy’ one

Cloud cover is a major forcing, and uncertain, say researchers from the Hebrew University, US and Australia Jerusalem, Jan. 26, 2014 – The warming effect of human-induced greenhouse gases is a given, but to what extent can we predict its … Continue reading

Posted in Aerosols, clouds, Weather | 103 Comments

Climate Craziness of the Week: only the ‘cooler’ models are wrong – the rest say 4ºC of warming by 2100

From the University of New South Wales and Dr. Steven Sherwood: “Climate sceptics like to criticise climate models for getting things wrong, and we are the first to admit they are not perfect,” said Sherwood. “But what we are finding … Continue reading

Posted in Climate Craziness of the Week, Climate sensitivity, clouds | Tagged , , , , , , | 168 Comments

Study: lack of cloud physics biased climate models high

The Hockey Schtick brings this to our attention. It seems Dr. Roy Spencer was prescient with his observation: “The most obvious way for warming to be caused naturally is for small, natural fluctuations in the circulation patterns of the atmosphere … Continue reading

Posted in Climate sensitivity, clouds, Modeling | Tagged , , , , , , , | 102 Comments

Real pollution (not ‘carbon’ pollution) increases storm clouds

From the Pacific Northwest National Laboratory: A common theme among climate alarmists is that the wrongly named ‘carbon pollution’ aka carbon dioxide, increases the frequency and intensity of storms. Observational data show that NOT to be true,  and this new study … Continue reading

Posted in Aerosols, clouds, thunderstorms, Weather | 26 Comments

Upwelling Longwave Over The Ocean

Guest Post by Willis Eschenbach To continue my investigations utilizing the CERES satellite dataset of top of atmosphere radiation, here is a set of curious graphs. The first one is the outgoing (upwelling) longwave radiation at the top of the … Continue reading

Posted in clouds, Oceans, Radiation, Sea Surface Temperature | Tagged , , , | 106 Comments

Chemtrails or Contrails? Another Alarmist Issue Without Scientific Context

NOTE: like with the essay Saturday about isotasy/glacial rebound being a myth, I don’t think the chemtrails idea has any merit whatsoever. Dr. Tim Ball points out more bad science – chemtrails, which are really just contrails, and which has … Continue reading

Posted in Bad science, clouds | Tagged , , , , , | 225 Comments

Atmosphere’s emission fingerprint affected by how clouds are stacked

From AGU highlights: Clouds, which can absorb or reflect incoming radiation and affect the amount of radiation escaping from Earth’s atmosphere, remain the greatest source of uncertainty in global climate modeling. By combining space-based observations with climate models, researchers are … Continue reading

Posted in clouds | Tagged , | 28 Comments

Solar gains in Spain may cause warmists pain

From the FECYT – Spanish Foundation for Science and Technology via Eurekalert comes this interesting note about solar forcing. It seems there’s a 2.3% per decade increase in solar radiation observed in Spain. Surely this is more than enough to … Continue reading

Posted in clouds, Solar | Tagged , , , , , , , | 298 Comments

Climate lab in a container on the high seas

From the Brookhaven National Laboratory: Yearlong MAGIC Climate Study Launches Climate instruments mounted aboard the Horizon Spirit container ship begin taking data The Horizon Spirit makes the round trip between Los Angeles and Hawaii every two weeks. UPTON, NY — A … Continue reading

Posted in clouds, Modeling | Tagged , , , | 42 Comments

Some confirmation of Spencer’s cloud hypothesis – it is getting less cloudy and warmer at the same time

A new paper just published in the Journal of Climate finds that global cloudiness has decreased over the past 39 years from between 0.9 to 2.8% by continent as shown in the figure below: The period of the study is … Continue reading

Posted in Climate sensitivity, clouds, Cosmic rays, Weather | Tagged , , , | 185 Comments

New paper shows negative cloud feedback associated with SAM

A paper published Friday in the Journal of Geophysical Research (GRL) finds that a known and natural atmospheric oscillation, the Southern Annular Mode or SAM, is correlated with observed increases in cloud cover resulting in regional cooling of approximately -2.5C. … Continue reading

Posted in clouds, Southern Annular Mode, Weather | Tagged , , , , , , | 78 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

Spencer’s posited 1-2% cloud cover variation found

In a nutshell, with a −1.6%per decade change in cloud cover during 1954–2005, it becomes a climate forcing. While China is not the world, it bears consideration. The Hockey Schtick reports: New paper finds significant, natural decrease in cloudiness over … Continue reading

Posted in Aerosols, Climate sensitivity, clouds, Cosmic rays | Tagged , , , , , , , | 90 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

Fogageddon

I suppose if  I truly want to take the weekend off, I’ll have to ditch my smartphone. These photos from the Facebook page of the Panhandle Helicopter Service in Panama City Beach, Florida, have been making the rounds today, erroneously … Continue reading

Posted in clouds, Weather | Tagged , , , | 85 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

Nacreous cloud show at the Arctic Circle

From spaceweather.com An apparition of polar stratospheric clouds is underway around the Arctic Circle. “It is almost as good as the aurora borealis,” says Göran Strand, who took this picture last night from Östersund, Sweden: Eric Schandall of Oslo, Norway, … Continue reading

Posted in clouds, Optical phenonmena | Tagged , , , , , , , | 71 Comments

Earth versus the flying saucers

I’m sure many of you remember this campy scifi film from 1956. Roswell on steroids. But did you know that there is a natural phenomenon on Earth that gives rise to reports of flying saucers on a regular basis? In … Continue reading

Posted in clouds, Curious things | Tagged , , , , | 129 Comments

High level clouds and surface temperature

Guest post by Erl Happ The orbit of the Earth’s around the sun is slightly eccentric. The closest point is called the perihelion. On January 4th the Earth is just 147,098,291 km away from the sun. Aphelion occurs July 4th … Continue reading

Posted in clouds | Tagged , , | 138 Comments

Cloud cools

Guest post by Erl Happ This post was generated in response to the Christopher Monkton thread. It is not a criticism of Christopher Monkton but of our tendency to imagine that artful mathematicians (I am not one) are sufficiently sophisticated … Continue reading

Posted in Climate sensitivity, clouds | Tagged | 113 Comments

New peer reviewed paper: clouds have large negative cooling effect on Earth’s radiation budget

Oh dear, now we have three peer reviewed papers (Lindzen and Choi, Spencer and Braswell, and now Richard P. Allan) based on observations that show a net negative feedback for clouds, and a strong one at that. What will Trenberth … Continue reading

Posted in clouds, Spencer-Braswell and Dessler | Tagged , , , , , , , , | 315 Comments

Prey and predator model of clouds

From the Weizmann Institute of Science – Eat, Prey, Rain Photo: Tamar Deutsch What do a herd of gazelles and a fluffy mass of clouds have in common? A mathematical formula that describes the population dynamics of such prey animals … Continue reading

Posted in Aerosols, clouds | Tagged , , , , | 29 Comments

While the Sun’s in a funk, no hint of resumed ocean warming

Global SST Update: Still No Sign of Resumed Warming by Roy W. Spencer, Ph. D. Here’s the global average sea surface temperature (SST) update from AMSR-E on NASA’s Aqua satellite, updated through yesterday, July 7, 2011: The anomalies are relative … Continue reading

Posted in Climate data, clouds, ENSO, Sea Surface Temperature | 64 Comments

World War II bombing raids offer new insight into the effects of aviation on weather

From Wiley-Blackwell via Eurekalert Wartime weather records reveal impact of contrails caused by USAAF raids Climate researchers have turned to the Allied bombing raids of the Second World War for a unique opportunity to study the effect thousands of aircraft … Continue reading

Posted in clouds, Weather | 77 Comments

Contrails – itty bitty icy forcing

From the American Geophysical Union weekly highlights: Estimating climate effects of contrails Condensation trails, or so-called contrails, formed by freezing of ice crystals in the exhaust from aircraft jet engines could affect climate. Like natural cirrus clouds, contrails change atmospheric … Continue reading

Posted in clouds, Weather | Tagged , , | 110 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

Clouds, radiative forcing, and climate models – still tweaking

As most readers know, clouds are still poorly understood and under-represented in climate models. This new research may help. From: DOE/Pacific Northwest National Laboratory Effect of cloud-scattered sunlight on earth’s energy balance depends on wavelength of light Accounting for wavelength … Continue reading

Posted in clouds, Modeling | Tagged , , , | 70 Comments

Global Warming is a Pussy Cat

Guest post by Ira Glickstein Thanks to WUWT readers who posted estimates of how much of the supposed 0.8ºC Global Warming since 1880 was due to Data Bias, Natural Cycles, and AGW (human-caused warming). I am happy with the results … Continue reading

Posted in Carbon dioxide, Climate data, clouds, measurement, NASA GISS, NOAA, Uncategorized | Tagged , | 36 Comments

Cloud Cellular Communication

No, I’m not talking about the Internet or the latest mobile phone. Apparently clouds are “teleconnected”. Two press releases were made the yesterday on the same subject, both are presented here. Note to climate scientists, try adding this to GCM’s. … Continue reading

Posted in clouds, Weather | 78 Comments

Noctilucent clouds may be more visible during this summer

From SpaceWeather.com Every summer since the late 19th century, Earth’s polar skies have lit up with gossamer, electric-blue clouds, twisting and rippling in the twilight sky. They’re called noctilucent (“night-shining”) because they can be seen after dark. The origin of … Continue reading

Posted in clouds, Solar, Weather | 15 Comments