Dr. James White: Atmos. CO2 changes from 180–280 ppm between glacials & interglacials. We just hit 380 ppm [2009]. Last time we had 380 was 3M years ago—arctic was ice free, sea level was 75 ft higher (“bye bye to Florida for the most part”). [Fact Checking]

April 26, 2014 11:27 pm1 comment
Dr.James White. Source: Learn More About Climate, Office for University Outreach, University of Colorado Boulder.

Summary of initial comments (paraphrases and quotes): Dr. Andreas Schmittner: “J.White is absolutely right [that] on long time scales higher CO2 means a warmer climate, less ice and higher sea level. […] I think the 380-400 ppm is a good estimate… [although] 75 ft seems a little too high.” Dr. Stephanie Thomas: Recent […]

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David Roberts on Grist.org: “If you aren’t alarmed about climate, you aren’t paying attention.” [For general commentary by CCNF Scientist Community]

April 21, 2014 6:24 pm4 comments
David Roberts at Grist.org

Summary of initial comments (paraphrases and quotes) [updated 4/28/14]: Dr. Andreas Schmittner: “Climate scientists don’t predict catastrophic impacts. They project impacts.” There’s an important difference. “Given the forcings climate scientists can project climate change for the future” but whether it is “catastrophic change [or] benign change [is a] valuation up to […]

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Yale Climate Connections: “On New IPCC Report, Views of the WSJ Differ Greatly from Those of Other Dailies.” [General Commentary]

April 14, 2014 2:52 am1 comment
Yale Climate Connections: “On New IPCC Report, Views of the WSJ Differ Greatly from Those of Other Dailies.” [General Commentary]

Summary of initial comments [updated 4/28/14]: Dr. Andreas Schmittner: “I’ve seen worse misinformation regarding climate change coming out of WSJ than that.”   On New IPCC Report, Views of the WSJ Differ Greatly from Those of Other Dailies Now that it has been almost 3 weeks since the release of the […]

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YAHOO NEWS Claims Climate is cooling and will likely continue cooling for 20 yrs. [For fact checking by CCNF Scientists]

April 7, 2014 3:54 pm4 comments
YAHOO NEWS Claims Climate is cooling and will likely continue cooling for 20 yrs. [For fact checking by CCNF Scientists]

Summary of initial comments in the Scientists’ Comment Thread [updated 4/28/14]: Dr. Scott Denning: “Solar maximum has been trending downward since the beginning of the satellite record in 1979, so it’s hard to take it seriously when people blame this for global warming. See the data for yourself here. Sorry, […]

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IPCC releases summary for policy makers on climate impacts, adaptation and vulnerability, accepts full final draft of second installment of AR5. [General Commentary]

March 31, 2014 6:45 pm0 comments
IPCC Volume II, Climate Change 2014, Impacts, Adaptation, and Vulberability, COVER

POSTED FOR COMMENTARY BY THE CCNF SCIENTIST COMMUNITY The long-awaited climate change impacts summary for policy makers (SPM) was released to the public today after gaining an official approval by the IPCC.  The final draft of the full report, titled Climate Change 2014: Impacts, Adaptation, and Vulnerability, was formally accepted by […]

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AAAS: Earth’s climate on path to warm beyond anything experienced in “past millions of years”; action needed to lower costs & risks of catastrophic and irreversible impacts. [General Commentary]

March 20, 2014 7:32 am1 comment
AAAS: Earth’s climate on path to warm beyond anything experienced in “past millions of years”; action needed to lower costs & risks of catastrophic and irreversible impacts. [General Commentary]

POSTED FOR COMMENTARY BY THE CCNF SCIENTIST COMMUNITY The American Association for the Advancement of Science (AAAS) — the world’s largest non-governmental and general scientific society and the executive publisher of the respected peer-reviewed journal Science — released a report on global warming on Tuesday.  The report, titled “What We Know,” is meant […]

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Dr. Neil deGrasse Tyson in Cosmos: “As these ancient forests grew and died […] their remains transformed into coal. 300M years later, we humans are burning that coal to power – and imperil – our civilization.” [Fact Checking]

7:22 am1 comment
Dr. Neil deGrasse Tyson in Cosmos:  “As these ancient forests grew and died […] their remains transformed into coal. 300M years later, we humans are burning that coal to power – and imperil – our civilization.” [Fact Checking]

POSTED FOR COMMENTARY BY THE CCNF SCIENTIST COMMUNITY “As these ancient forests grew and died and sank beneath the surface, their remains transformed into coal. Three hundred million years later, we humans are burning that coal to power — and imperil — our civilization.” — Dr. Neil Degrasse Tyson. Credit: “Standing […]

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Dr. Garth Paltridge on JudithCurry.com: Reluctance of IPCC to reduce confidence levels in light of hiatus and misunderstood mechanisms shows a lack of scientific skepticism. [For fact checking & general commentary]

7:18 am15 comments
Dr. Garth Paltridge. Source: YouTube

Summary of initial comments in the Scientists’ Comment Thread [updated 4/28/14]: Dr. Andreas Schmittner: “G.Paltridge claims that scientists could not exclude the possibility that the surface warming observed over the last 50 years was due to fluctuations in ocean currents. This is extremely unlikely given the observed [changes].  The claim […]

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The Economist: Scientists were very confident that planet would be warmer by now, and “no one knows for sure why it isn’t… This isn’t a crisis for climate science… but it is for climate-policy advocates who based their arguments on the authority of scientific consensus.” [For general commentary]

7:18 am0 comments
"The figure above compares the three major global surface temperature records to 105 unique runs involving 42 different GCMs used in the upcoming IPCC report. It shows the 5th and 95th percentile of model runs in light grey, and the 25th to 75th percentile in dark grey, with a black line representing the average of all models. While surface temperatures have generally remained fairly close to the multi-model mean in the past, the recent pause threatens to cause surface temperatures to fall below the 5th percentile of models in the next year or two if temperatures do not rise." Source: YaleClimateMediaForum.org.

POSTED FOR COMMENTARY BY THE CCNF SCIENTIST COMMUNITY The following excerpts are from a fairly recent article in The Economist, titled “A Cooling Consensus,” by W.W. In the article, the author critiques an article in the New Republic, titled “Explaining the Global Warming Consensus–Grapping with climate change nuance in a […]

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Nate Cohn in New Republic: Last decade warmest on record and hiatus due to “laundry-list of mitigating factors like a prolonged La Nina, […] modest volcanic activity, and ebb in solar activity.” [For general commentary]

7:17 am0 comments
New Republic: "Explaining the Global Warming  Hiatus," by Nate Cohn

POSTED FOR COMMENTARY BY THE CCNF SCIENTIST COMMUNITY The following excerpts are from a fairly recent article in the New Republic, titled “Explaining the Global Warming Consensus — Grapping with climate change nuance in a toxic political environment,” by Nate Cohn. (Click on the previous link to read the full article […]

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