Tag Archives: Northern Hemisphere

Mauna Loa hits 400 PPM of CO2, alarmists wail and gnash teeth, Earth survives

Posted on May 10, 2013 by

Source: http://www.esrl.noaa.gov/gmd/ccgg/trends/weekly.html Al Gore calls for a day of prayer and reflection, and bothering your neighbor: So please, take this day and the milestone it represents to reflect on the fragility of our civilization and and the planetary ecosystem on … Continue reading →

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Posted in Carbon dioxide | Tagged , , , , , , , | 292 Comments

New NSF paleo research claiming Arctic was warmer fails to take major ocean circulation changes 3 million years ago into account

Posted on May 9, 2013 by

I covered this story earlier today, and it was presented much differently in that press release. This press release takes a different tack. IMHO, it looks like a big “ooops” from the National Science Foundation. See what I found after … Continue reading →

Posted in Arctic, Paleoclimatology | Tagged , , , , , , , | 49 Comments

More ‘ice free Arctic’ claims – we’ve heard it all before

Posted on May 9, 2013 by

From the University of Massachusetts at Amherst, something we’ve heard before. For example this claim from 2008. Gotta love the use of props to show how climate tipping points work: NASA: Arctic Ocean Could be Mostly Ice Free in 2013 … Continue reading →

Posted in Arctic, Sea ice | Tagged , , , , , , , | 71 Comments

The curious case of rising CO2 and falling temperatures

Posted on May 8, 2013 by

Guest essay by Tony Brown Some readers might recall my recent article ‘The Long Slow Thaw?’ In this I reconstructed Central England temperature to 1538 from its current instrumental date of 1659. I was surprised by two notable periods of … Continue reading →

Posted in Uncategorized | Tagged , , , , , | 140 Comments

Another amplification mechanism discovered by which the Sun affects Earth’s climate

Posted on April 30, 2013 by

From The Hockey Schtick A paper published Tuesday in the Journal of Climate finds tiny variations in solar activity over 11-year solar cycles have greatly amplified effects upon climate via changes in the Arctic Oscillation, North Pacific sea surface temperatures … Continue reading →

Posted in Cosmic rays | Tagged , , , , , , , | 72 Comments

Temperature change in perspective

Posted on April 25, 2013 by

Guest post by Ed Hoskins The UK Met Office long term Central England Temperature record[1] has kept a continuous and consistent data set since the 1660s. It appears to be reliable and to have maintained its quality. It has not … Continue reading →

Posted in Temperature | Tagged , , , , , , , | 49 Comments

Future shifts in rainfall

Posted on April 3, 2013 by

From UC Berkeley: Rising temperature difference between hemispheres could dramatically shift rainfall patterns in tropics By Robert Sanders, Media Relations  BERKELEY — One often ignored consequence of global climate change is that the Northern Hemisphere is becoming warmer than the … Continue reading →

Posted in Global warming, Rainfall | Tagged , , | 93 Comments

Study: Black carbon aerosol forcing may be an important factor affecting the snow & ice cover in the Northern Hemisphere

Posted on March 7, 2013 by

We’ve had several essays here at WUWT  on the role of Black Carbon soot and its role in affecting surface albedo. Anyone who has ever witnessed “dirty snow” knows that it tends to melt faster than white snow under sunlight … Continue reading →

Posted in Aerosols, Carbon soot | Tagged , | 58 Comments

From UAH – Global Temperature Report: January 2013

Posted on February 6, 2013 by

Second warmest January in past 35 Global climate trend since Nov. 16, 1978: +0.14 C per decade January temperatures (preliminary) Global composite temp.: +0.51 C (about 0.92 degrees Fahrenheit) above 30-year average for January. Northern Hemisphere: +0.55 C (about 0.99 … Continue reading →

Posted in Climate data | Tagged , , , , , , , | 55 Comments

Waste heat – a bigger climate effect than once thought

Posted on January 27, 2013 by

Dr. Roy Spencer recently opined about this issue (which is different from UHI) in: Waste Heat as a Contributor to Observed Warming If we divide that by the surface area of the U.S. in meters, we get 0.33 watts per sq. … Continue reading →

Posted in Energy, Waste heat | Tagged , , , , , , , , | 138 Comments

Global Temperature Updates – 2012

Posted on January 23, 2013 by

By Paul Homewood While Obama is imploring us to stop the global warming that is bringing us “the devastating impact of raging fires, and crippling drought, and more powerful storms”, it would seem to be a good idea to see … Continue reading →

Posted in Climate data | Tagged , , , , , , , | 23 Comments

The Dr. David Viner moment we’ve all been waiting for…a new snow record

Posted on January 4, 2013 by

WUWT readers surely recall this most often quoted prediction about snow. From the Independent’s most cited article: Snowfalls are now just a thing of the past by Charles Onians: However, the warming is so far manifesting itself more in winters … Continue reading →

Posted in records, snowfall, Weather | Tagged , , , , , | 248 Comments

Yet another paper demonstrates warmer temperatures 1000 years ago and even 2000 years ago.

Posted on October 18, 2012 by

Yesterday I highlighted the paper The extra-tropical Northern Hemisphere temperature in the last two millennia: reconstructions of low-frequency variability, by B Christiansen of the Danish Meteorological Institute and F C Ljungqvist of Stockholm University which showed that using a multitude … Continue reading →

Posted in Paleoclimatology | Tagged , , , , , | 182 Comments

New paper confirms the climate was warmer 1000 years ago

Posted on October 17, 2012 by

Mike Mann will have a twitfest on Twitter trying to knock this one down. Data from 91 Northern Hemisphere proxies was used to reconstruct temperature. See reconstruction graph (figure 5) below. Via The GWPF: A new paper, looking back at … Continue reading →

Posted in Michael E. Mann, Paleoclimatology | Tagged , , , , , | 85 Comments

New study finds that a Carrington class solar event could cause global cooling of more than 3C

Posted on September 26, 2012 by

A paper recently published in Atmospheric Chemistry and Physics finds that “a solar proton event, if it took place in the near future with an intensity similar to that ascribed to the Carrington Event of 1859″. Based on the results … Continue reading →

Posted in Solar, solar flare, Spaceweather | Tagged , , , , , , | 132 Comments

Little Ice Age Thermometers- Historic variations in temperatures Part 3 -BEST confirms extended period of warming.

Posted on August 14, 2012 by

Guest post by Tony Brown This short paper is a preliminary examination of BEST data to 1753, as compared to the Central England Temperature Record (CET) to 1660 (instrumental record) and 1538 (Extended by Tony Brown using thousands of contemporary … Continue reading →

Posted in UHI, Climate data, Berkeley Earth Surface Temperature | Tagged , , , , , , | 68 Comments

NASA’s James Hansen’s big cherry pick

Posted on August 6, 2012 by

From NASA:  Research Links Extreme Summer Heat Events to Global Warming A new statistical analysis by NASA scientists has found that Earth’s land areas have become much more likely to experience an extreme summer heat wave than they were in … Continue reading →

Posted in extreme weather, James Hansen | Tagged , , , , , , | 189 Comments

Sea Ice News – Volume 3 Number 8 – meltwater hues, or blues?

Posted on July 20, 2012 by

WUWT commenter Caleb writes on 2012/07/20 at 7:53 am Check out the “North Pole Camera” on the WUWT “Sea Ice Page.” Both Camera #1 and Camera #2 show lovely summer weather, and patches of melt-water atop the ice. One problem … Continue reading →

Posted in Sea Ice News | Tagged , , , , , | 61 Comments

Why the U.S East Coast heatwave was not unusual nor the number of record temperatures unprecedented.

Posted on July 8, 2012 by

This is a combination of two posts elsewhere that illustrate just how much hype and how little substance the MSM and blogs like Grist, Climate Progress. and Capital Weather Gang have been pushing trying to make a run of the … Continue reading →

Posted in records, Weather, Weather_stations | Tagged , , , , , , | 92 Comments

‘We don’t believe the ice cores can be interpreted purely as a signal of temperature’

Posted on June 26, 2012 by

From the University of Wisconsin: Greenland ice may exaggerate magnitude of 13,000-year-old deep freeze by Chris Barncard Ice samples pulled from nearly a mile below the surface of Greenland glaciers have long served as a historical thermometer, adding temperature data … Continue reading →

Posted in Greenland ice sheet, Paleoclimatology | Tagged , , , , , , , | 43 Comments