Site: Bart Verheggen

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Recent Articles

Bart Verheggen: A critical look at “The uncertainty has settled” documentary by Marijn Poels

(Zie de Nederlandse versie door Jos Hagelaars op ons Klimaatverandering blog) The documentary “The uncertainty has settled” from Dutch filmmaker Marijn Poels follows him on his journey in rural Austria and Germany to witness how energy policies impact traditional agriculture. That is the stepping stone to also look into different ideas about how and why

2017-07-17 10:39   Click to comment

Bart Verheggen: I’ll march for science, because the truth and the pursuit of truth matters. A lot.

This saturday 22 April a global March for Science will take place in around 500 hundred cities worldwide. I’ll take part in the Amsterdam March for Science, taking place between 12:00 and 16:00 on Museumplein. You can find me in the “discovery” tent with some posters about climate change and sustainable energy. Science and rational

2017-04-20 21:18   Click to comment

Bart Verheggen: Earth’s temperature over the past two million years

A new reconstruction of global average temperature over the past two million years has recently appeared in Nature (Snyder, 2016). That is quite a feat and a first for this duration. The figure below, made by Jos Hagelaars, shows Snyder’s temperature reconstruction, combined with the observed warming since 1880 and projected warming until the year

2016-10-06 21:38   Click to comment

Bart Verheggen: Climate inertia

Imagine you’re on a supertanker that needs to change its direction in order to avoid a collision. What would you do? Would you continue going full steam ahead until you can see the collision object right in front of you? Or would you try to change course early, knowing that changing a supertanker’s course takes

2016-08-09 15:05   Click to comment

Bart Verheggen: New survey of climate scientists by Bray and von Storch confirms broad consensus on human causation

Bray and von Storch just published the results of their latest survey of climate scientists. It contains lots of interesting and very detailed information, though some questions are a little biased in my opinion. Still, they find a strong consensus on human causation of climate change: 87.4% of respondents are to some extent convinced that

2016-06-22 16:57   Click to comment

Bart Verheggen: Consensus on consensus: a synthesis of consensus estimates on human-caused global warming

Most scientists agree that current climate change is mainly caused by human activity. That has been repeatedly demonstrated on the basis of surveys of the scientific opinion as well as surveys of the scientific literature. In an article published today in the journal Environmental Research Letters (ERL) we provide a review of these different studies,

2016-04-13 01:02   Click to comment

Bart Verheggen: Antarctica: ice gain or loss?

Guest post by Dr. Jan Wuite, Enveo, Innsbruck A new study released by NASA scientist Jay Zwally and colleagues in the Journal of Glaciology, receiving wide coverage in the media last month, reports an 82 Gigatons per year increase of land ice in Antarctica during the period 2003-2008. The study received much skepticism from other

2015-11-25 20:01   Click to comment

Bart Verheggen: From complex clarity to nuanced misunderstanding: Response to Hollin and Pearce

Earlier this year, Greg Hollin and Warren Pearce published a short letter in Nature Climate Change entitled Tension between scientific certainty and meaning complicates communication of IPCC reports. In contrast to their claims, we demonstrate in our comment on this article that the IPCC correctly placed the hottest decade in the context of long-term trends.

2015-10-24 08:30   Click to comment

Bart Verheggen: Wanted: blog readers to be interviewed as part of PhD research into climate blogging

Guest post by Giorgos Zoukas. As part of his research on climate blogging he would like to interview blog readers. Please contact him if you’d like to participate. He has interviewed me as well as some other climate scientist bloggers. BV   Invitation to participate in a PhD research project on climate blogging My name

2015-10-10 20:07   Click to comment

Bart Verheggen: Richard Tol misrepresents consensus studies in order to falsely paint John Cook’s 97% as an outlier

John Cook warned me: if you attempt to quantify the level of scientific consensus on climate change, you will be fiercely criticized. Most of the counterarguments don’t stand up to scrutiny however. And so it happened. The latest in this saga is a comment that Richard Tol submitted to ERL, as a response to John

2015-09-24 07:50   Click to comment


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