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Has the Flood of Interest in IPCC and Climate Change Dissipated?

The release of the IPCC report caused a short surge in public interest about climate change, according the Google Trends search data. Like a river after a flood, the waters have receded. Ten days later, the flood wave has dissipated, and search...

Posted October 11, 2013    

Discussing Climate Change in a Hot and Cold World

There's been a small burst of skepticism about the science of climate change in the media in the past few months, as if arguments usually confined to dark corners of the internet oozed out into hallway. This was encapsulated in the well-researched...

Posted May 8, 2013    

Pipeline Debates Distracting from Broader Climate Policy Concerns

There's much argument about whether building the Keystone XL pipeline will unleash an oil sands "carbon bomb" and whether activists are attacking symbols rather than true causes. Below is a post from last year, outlining my argument why...

Posted March 25, 2013    

Carbon Emissions Blow Past the Financial Crisis

Data from CDIAC. Asterisks notes dips with multiple possible causes. During a plenary presentation at last fall's AGU meeting, Bob Watson argued that this is the first time in modern history that the carbon emissions have fully rebounded from a...

Posted March 12, 2013    

New Oil Sands Pipeline Plan Would Dramatically Increase Carbon Emissions

The Vancouver Sun reports that Kinder Morgan, operator of the Trans Mountain pipeline that transports oil from Alberta to the Port of Vancouver, hopes to increase the capacity of the proposed pipeline "twinning" project. Here, I've updated previous...

Posted January 12, 2013    

Climate Change in the Age of Truthiness

Does reality shape our beliefs, or do our beliefs shape "reality"? A fascinating paper by "Did the Arctic Ice Recover? Demographics of True and False Climate Facts" by Lawrence Hamilton examined this question using polling data on people's beliefs...

Posted January 10, 2013    

Changing the IPCC to Better Meet The Needs Of International Climate Policy

One seemingly minor and unreported component of the recent UN climate talks in Doha highlights the drawbacks of old-school scientific assessments and the need to modernize the IPCC process. It is especially relevant given last week's leak of draft...

Posted December 18, 2012    

"Game-changing" leak from the IPCC reports? Please.

The claim by the Watts up with that blog that statements in a leaked draft of the upcoming IPCC assessment report is "game-changing" is not wrong scientifically, it makes no logical sense. The supposedly game-changing evidence - that there may have...

Posted December 17, 2012    

Storm Surges, Sea Level and Climate Change

In the inevitable discussion about the relationship between climate change and Hurricane Sandy, there's been much focus on the storm surge. Hallelujah. There are a lot of ways climate change could influence tropical cyclones. In the past, most of...

Posted November 9, 2012    

Is the 2 degree target likely to save most coral reefs?

The new paper in Nature Climate Change by Katja Frieler, a number of other colleagues and I warns that limiting global warming to 2 deg C Celsius, the threshold long-discussed at the policy level and now enshrined in the Cancun Accord, is unlikely...

Posted September 21, 2012    

Drought and ethanol crunch U.S. corn crop

There's a lot of fear-mongering in the media about the impact of the U.S. drought on food production and what that means for the future. A look at the crop supply data, available from the USDA feed grains yearbook, tells the full story, and it is...

Posted August 22, 2012    

Proposed pipelines undermine Canada's climate target for 2020

A New York Times editorial argued that the U.S. should consider the climate implications of constructing pipeline, like Keystone XL, to transport bitumen from the oil sands in Alberta. As should Canada. The carbon emissions embedded in bitumen that...

Posted July 31, 2012