Signs of the Seasons: A Maine Phenology Program

Spring Paints the Piedmont Green

Spring Paints the Piedmont Green

Satellite observations can provide a time series of unique snapshots that capture seasonal changes in land vegetation.  This recent Nasa Earth Observatory article describes research integrating satellite imagery with ground observations (like those made by our Signs of the Seasons observers!) that indicate a trend toward earlier onset of spring greening over the past few decades.

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