Does “business as usual” lead to an additional 56-108 extremely hot days (over 95°F) per year by 2100? Extreme weather & sea level rise predictions by the “Risky Business” report [Fact Checking]

August 18, 2014 12:53 pm0 comments
Increase in annual number of extremely hot days predicted by the Risky Business Report. Source: Risky Business website.

The following graphics and block quotes are from a recent report on the economic risks of climate change by the Risky Business Project. The video toward the end of the post is from the Risky Business website. For more about the report and its authors, and the heavyweights in the financial world backing the project, […]

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Teaching Climate Change through Six Questions

August 12, 2014 3:47 pm5 comments
Teaching Climate Change through Six Questions

Given all the back and forth on climate change out there, it can be hard to know what to think. It’s also a complicated subject, so much of the information is distributed all over the place or in huge tomes. Below I’ve put together a fairly quick overview that I’ve […]

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How hot is it going to get and how fast? A chat with Scott Denning on climate sensitivity

July 30, 2014 5:09 pm0 comments
How hot is it going to get and how fast? A chat with Scott Denning on climate sensitivity

Climate sensitivity has become a regular topic of conversation in the Forum, and—as this layman has discovered—it is a central concept to understanding how the climate system works. Most importantly, through climate sensitivity you can get a scientist’s best answer to the million-dollar question of “How hot is it going to get?” […]

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Part I: History of climate change science (1836-1969) according to Pulitzer-Prize winning author [General Commentary]

July 29, 2014 12:34 am1 comment
Tyndall delivering a public lecture at the Royal Institution. Credit: University College.

A note by Michael Quirke: I have always found that one of the best ways to learn about the present is to look to the past, so for this post we’ll be looking back in time to explore the history of climate change science. For instance, when was man-made climate change first hypothesized? When did it become an […]

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FORUM REPORT 01

July 21, 2014 9:06 pm0 comments
FORUM REPORT 01

Foreword by Michel Quirke: In these Forum Reports, I will be doing my best to inform readers on who said what in Climate Change National Forum and why it matters. The CCNF scientists have published a lot of material in these last 7 months, so it might take around four Forum Reports to get caught up, […]

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National Climate Assessment: Climate change effects are already being felt across country, will grow more severe in time. “Climate change, once considered an issue for a distant future, has moved firmly into the present,” states the report’s introduction.

July 16, 2014 7:49 am0 comments
National Climate Assessment

Note by Michael Quirke: In case you missed it, the federal government released the National Climate Assessment (NCA) in May. The report concluded that man-made climate change is already impacting every region of the United States in negative ways. The CCNF journalism team had this write-up on the media coverage of the report a week after its release, and […]

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Recent Lessons from the Past

June 4, 2014 5:37 am3 comments
Global surface temperature (anomaly from 1960-1990 average) reconstructions for the past 9000 years (Marcott et al. 2013), for the past 2,000 years (PAGES 2k), and observed for the past 150 years (Instrumental data from HadCRUT4) and the last 30 years (star). From Kaufman et al. (2013).

Recently a german taxi driver asked me if climate hasn’t been changing in the past with similar warm periods as the one we have now. After getting back home to Corvallis, Oregon, I read a letter to the editor of our local newspaper claiming that it was much warmer than […]

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ClimateDialogue about Climate Sensitivity

May 15, 2014 6:34 pm2 comments
ClimateDialogue about Climate Sensitivity

After a bit of “hiatus”, ClimateDialogue (CD) has re-opened again with a discussion on climate sensitivity. On one hand this site is unique in bringing together ‘mainstreamers’ and ‘contrarians’ (both in the organization and in the discussions), hopefully leading to both enhanced clarity on what the (dis)agreements are really about […]

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Pine Island Glacier hypothesis to emergent event

May 13, 2014 11:23 am0 comments
NASA MODIS from November 2013 indicating break off of iceberg from Pine Island Glacier.

This Post is an update to one I wrote in 2009 for Realclimate. It is warranted given the increasing observations in papers by Rignot et al (2014), Favier et al (2014), and Mouginot et al (2014) that the Pine Island Glacier exiting into the Amundsen Sea in West Antarctica has […]

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Science Magazine: “Outsider Finds Missing Global Warming” and NASA data sets “have underestimated the pace of warming between 1997 and 2012 by an estimated 158% and 49% respectively.” [Fact Checking]

May 5, 2014 5:25 am3 comments
Source: Cowtan and Way

Summary of initial comments (paraphrases and quotes): Dr. Andrew Dessler: “I really liked this article and I learned a few things — such as the fact that Cowtan and Way are not climate scientists, but are contributors to Skeptical Science.” Will add one point: “While I accept their adjustment, this does not […]

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