Natural Variability in the Widths of the Tropics

Guest Post by Willis Eschenbach In my previous post, “Does This Analysis Make My Tropics Look Big?“I discussed a paper called “Recent Northern Hemisphere tropical expansion primarily driven by black carbon and tropospheric ozone”, by Robert Allen et al, hereinafter A2012. They use several metrics to measure the width of the tropics—the location of the…

California Air Resources Board to make webcast on ‘black carbon and other “short-lived” greenhouse gases. ‘

Short notice – this is on NOW. Worth watching, even if only for how they justify saying ‘black carbon and other “short-lived” greenhouse gases.’. I didn’t know black carbon was a gas. Here’s the release: On Thursday, May 24, at 12 NOON EASTERN DAYLIGHT TIME / 9:00 AM PACIFIC DAYLIGHT TIME, a group of internationally…

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Does This Analysis Make My Tropics Look Big?

Guest Post by Willis Eschenbach There is a new paper in Nature magazine that claims that the tropics are expanding. This would be worrisome because it could push the dry zones further north and south, moving the Saharan aridity into Southern Europe. The paper is called “Recent Northern Hemisphere tropical expansion primarily driven by black…