Yesterday I was keynote speaker at a one day conference in Leeuwarden, organised by the water technology institute Wetsus. First I want to thank the two directors of Wetsus, Cees Buisman and Johannes Boonstra, for giving me the opportunity to present my view on the global warming debate. Next, they gave each of the 150 participants a copy of my book. By doing this they greatly support the kind of research I have been doing over the past three years and hope to be doing in the next few years. This kind of support makes it possible to stay independent as a journalist and do investigative reporting.
As most of the participants are working in the water business (waste water treatment, drinking water etc.) I decided to concentrate my lecture (my PPT is available here) on the role of water in the climate debate. This turns out to be quite interesting because the global warming debate is more about the role of water than about the primary radiative effect of CO2, which is well understood and accepted by all parties.
The main issues remain that a theoretically expected warming from CO2 does not mean that the recent warming (1980-now) is caused by CO2, that there seems to be no global warming in the oceans in the last decade, that most of the future warming in the models is coming from water vapor and cloud feedbacks but that currently the observational evidence for these feedbacks is not yet very strong, let alone evidence for a net positive feedback.
As half of the participants were not Dutch my presentation was in English. For many slides I didn’t provide the sources so I will use this post to give some background and sources for my talk.