Monday, March 12, 2012

Quantifying phenology: urban heat islands extend growing season

In New Hampshire, fall was like a fireworks display drawn out over weeks. You could watch the colors slowly wrap around the hills in ways that made it fun to walk home from work. 

Just a quick note here to highlight a good paper by Andrew Elmore and co-authors. The key to what they did was quantify spatial patterns of phenology--essentially spring green-up and fall brown-down--by comparing seasonal NDVI patterns. 

Maps like the one above have never been done before. 

One of the key findings was showing how phenology shifted elevationally. Another was how urban heat islands lengthened the growing season on both ends. 

It's a good one to look at, because there will be more like it coming soon I'll bet.

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