Articles by Andrew Dessler

Climate skeptics lose even more credibility

The first half of 2007 is the warmest Jan-June period on record, +0.79°C above the long-term average (from NASA GISS data, via QuarkSoup.net).

For those who question the consensus on climate change, see the collection of proconsensus statements at Logical Science (hat tip: Michael Tobis). Just recently, my department (the Dept. of Atmospheric Sciences at Texas A&M University) unanimously adopted a statement endorsing the primary conclusions of the IPCC reports. See the statement here.

In the scientific community, virtually no one believes that solar variations are the dominant driver of climate over the last few decades. However, among skeptics, this has been one of the last remaining shreds of hope for a non-human cause of climate change. New research, however, validates the doubt of the scientific community:

Writing in Proceedings of the Royal Society A, a journal of Britain's de-facto academy of sciences, the team said that the Sun had been less active since 1985, even though global temperatures have continued to rise.

"Over the past 20 years, all the trends in the Sun that could have had an influence on the Earth's climate have been in the opposite direction to that required to explain the observed rise in global mean temperatures," they write.

A professor of History and Science Studies explains

For those interested in why the scientific community is so certain about climate change, take a look at this presentation and this book chapter, both by Naomi Oreskes.

She does a great job explaining how science reaches conclusions, and why we can be pretty sure that humans are indeed warming the climate.

Especially for dermatologists

Those who argue that increasing carbon dioxide is good because it's "plant food" should consider this article from the WSJ about poison ivy. It says:

Poison ivy, the scourge of summer campers, hikers and gardeners, is getting worse.

New research shows the rash-inducing plant appears to be growing faster and producing more potent oil compared with earlier decades. The reason? Rising ambient carbon-dioxide levels create ideal conditions for the plant, producing bigger leaves, faster growth, hardier plants and oil that's even more irritating.

Although the data on poison ivy come from controlled studies, they suggest the vexing plant is more ubiquitous than ever. And the more-potent oil produced by the plants may result in itchier rashes. "If it's producing a more virulent form of the oil, then even a small or more casual contact will result in a rash," says Lewis Ziska, a plant physiologist for the U.S. Department of Agriculture in Beltsville, Md.

Climate change science questioned

In an op-ed in today's Washington Post, Emily Yoffe asks an interesting question:

All this is not to say that it's not getting warmer and that curbing our profligate environmental ways is not a commendable and necessary goal. But perhaps this movement is sowing the seeds of its own destruction -- even as it believes the human species has sown its own. There must be a limit to how many calamitous films, books and television shows we, and our children, can absorb.

It doesn't seem sustainable to expect people to remain terrified by such a disinterested, often benign -- it was so nice eating out on the patio! -- and even unpredictable enemy.