Diurnal Temperature Range

OK, here’s something I don’t get: a new paper in GRL by Russell Vose at the National Climatic Data Center suggesting the decrease in the diurnal temperature range slowed dramatically from 1979-2004. Maybe some of you climate types can ‘splain this? (Backstory for non-climate wonks: The “diurnal temperature range” is the difference between the daytime …

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Careful What You Wish For

Forests are a good thing, right? And reversing deforestation is a smart approach to climate change – locking all that carbon back up in trees, right? A new paper out of Lawrence Livermore throws an odd monkey wrench into the conventional wisdom, using model simulations to conclude that grassland cools while forest warms: We find …

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Did the Maya Cause Their Own Droughts?

Interesting work presented at AGU by a University of Alabama/NASA/etc. group suggesting the the possibility that Mayan deforestation may have brought on the drought conditions that some blame for the collapse of classic Maya culture. I have thought that the Maya might make a good case study for a society done in by drought, expanding …

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Climate, Land Use and Spatial Variability

Johannes J. Feddema and colleagues have a paper in Science today(Feddema et al. 2005) on the importance of land use in climate change. (And the suddenly ubiquitous Roger Pielke Sr. has an accompanying Perspective piece(Pielke Sr. 2005), and Roger also blogs it here.) What Feddema and company did was run a global climate model with …

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Societal Complexity

On our October trip, Lissa and I visited the Anasazi Heritage Center outside Cortez in southeastern Colorado. It’s a neat museum, built to record, preserve and provide public access to excavations done before the nearby McPhee Reservoir was filled. Adjacent to the museum, there’s a small pueblo room block that’s been excavated and then stabilized …

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