Tag Archives: Northern Hemisphere

Claim: Solar activity not a key cause of climate change, study shows

From the University of Edinburgh , another one-paper syndrome in the making funded by an NGO research council with a political mission to grab a headline. And, another poorly written press release where they don’t even cite the name of … Continue reading

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Posted in Modeling, Science, Solar | Tagged , , , , , , , | 182 Comments

Climate, Stadium Waves, and Traffic Waves

In a recent paper, Marcia Wyatt and Judith Curry posited about “Stadium Waves” and climate, suggesting that the ‘stadium-wave’ signal propagates like the cheer known as “the wave” at sporting events whereby sections of sports fans seated in a circular or … Continue reading

Posted in Curious things, Hiatus in Global Warming | Tagged , , , , , , , , , | 71 Comments

Methane estimates from the Arctic double, but there’s no cause for alarm

From the University of Alaska, Fairbanks Study: Arctic seafloor methane releases double previous estimates The seafloor off the coast of Northern Siberia is releasing more than twice the amount of methane as previously estimated, according to new research results published … Continue reading

Posted in Methane | Tagged , , , , , , , | 79 Comments

A link between the solar magnetic field and weather patterns on Earth may explain our lower than normal severe weather in 2013

From the “science is settled” department comes this new paper that points out a correlation between the Interplanetary Magnetic Field (IMF) and polar jet streams, which drive weather events on Earth. This new paper shows that the effects extend even … Continue reading

Posted in hurricanes, Solar, thunderstorms, tornadoes, Weather | Tagged , , , | 86 Comments

NSF says biosphere is breathing in CO2 more deeply

Press Release 13-139 Seasonal carbon dioxide range expanding as more is added to Earth’s atmosphere Northern Hemisphere land-based ecosystems “taking deeper breaths,” scientists find Levels of carbon dioxide in the atmosphere rise and fall each year as plants, through photosynthesis … Continue reading

Posted in Carbon dioxide | Tagged , , , , , , , | 89 Comments

Great News from Greenland

Guest essay by Dr. Patrick J. Michaels I recently returned from a trip to Greenland’s Jokabshavn Glacier, which discharges more ice than any other in the Northern Hemisphere. Our route of flight from Reykjavik traversed the ice cap from about … Continue reading

Posted in Glaciers, Greenland ice sheet | Tagged , , , , , , , | 65 Comments

Paper: ‘Summer temperatures were about 10°C warmer than today, even though the concentration of atmospheric CO2 was similar’

From AAAS: From Russia with Lovely Data Climate and the atmospheric concentration of CO2 are closely linked. Brigham-Grette et al. (p. 1421, published online 9 May) present data from Lake El’gygytgyn, in northeast Arctic Russia, that shows how climate varied … Continue reading

Posted in Paleoclimatology | Tagged , , , , , , , | 56 Comments

Pollution in Northern Hemisphere helped cause 1980s African drought

From the University of Washington: Decades of drought in central Africa reached their worst point in the 1980s, causing Lake Chad, a shallow lake used to water crops in neighboring countries, to almost dry out completely. The shrinking lake and … Continue reading

Posted in Drought | Tagged , , , , , , , | 69 Comments

Last three years prove AGW is not responsible for tornadoes

By Joseph D’Aleo, CCM Tuesday was an active severe weather day with 29 reported tornadoes (preliminary). Enlarged But for the season thus far, we are at the bottom end of the frequency as of the date. When it was active … Continue reading

Posted in tornadoes, Weather | Tagged , , , , , , , | 36 Comments

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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.

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

NASA’s James Hansen’s big cherry pick

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?

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.

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’

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

Natural Variability in the Widths of the Tropics

Guest Post by Willis Eschenbach In my previous post, “Does This Analysis Make My Tropics Look Big?“I discussed a paper called “Recent Northern Hemisphere tropical expansion primarily driven by black carbon and tropospheric ozone”, by Robert Allen et al, hereinafter … Continue reading

Posted in Tropics | Tagged , , , , , , , , , , , , | 93 Comments

The CIA documents the global cooling research of the 1970’s

Despite what NCDC’s Thomas Peterson, Wikiwrangler William Connolley, and John Fleck would like you to believe as a “myth” (The Myth of the 1970s Global Cooling Scientific Consensus), there was in fact serious consideration of the global cooling issue in … Continue reading

Posted in Global cooling | Tagged , , , , , | 96 Comments

California Air Resources Board to make webcast on ‘black carbon and other “short-lived” greenhouse gases. ‘

Short notice – this is on NOW. Worth watching, even if only for how they justify saying ‘black carbon and other “short-lived” greenhouse gases.’. I didn’t know black carbon was a gas. Here’s the release: On Thursday, May 24, at … Continue reading

Posted in Uncategorized | Tagged , , , , , , , | 38 Comments

Sea Ice News Volume 3 Number 5 – SEARCH Sea Ice Outlook forecasting contest for 2012

The Arctic sea ice extent forecasting contest is on again.  As before I’ll allow readers to submit their best estimates in a poll, and I’ll submit those results as we’ve done in the past two years. Last year, the forecast … Continue reading

Posted in Arctic, Sea Ice News | Tagged , , , , , , , | 56 Comments

Does This Analysis Make My Tropics Look Big?

Guest Post by Willis Eschenbach There is a new paper in Nature magazine that claims that the tropics are expanding. This would be worrisome because it could push the dry zones further north and south, moving the Saharan aridity into … Continue reading

Posted in Tropics | Tagged , , , , , , , , , , | 84 Comments

Carbon soot may be driving the expansion of the tropics – not CO2

From the University of California – Riverside it seems that black carbon soot is driving tropical expansion. How could this be? I thought CO2 was all powerful, so powerful with the strength of 400,000 Hiroshima bombs each day that animals … Continue reading

Posted in Aerosols, Carbon soot | Tagged , , , , , , , , | 74 Comments