NDVI Map Animation
These animated maps show satellite-estimated vegetation "greenness" across the Mid-Atlantic region for the “start of season” date, which was calculated from satellite greenness at a single location in the Shenandoah National Park. The green bars in the chart indicate dates of “start of season,” “maximum greenness,” and “end of season” for a single pixel located in the region that were derived from daily satellite measurements of greenness (note the black trace line). Typically the northernmost and high elevation vegetation “greens up” later than southerly and low elevation vegetation. The annual start of season across the years varies with temperature and precipitation.
Measurements of tree cover are made from hemispherical or “fisheye” images of overhead tree canopy. These are compared to measurements made using satellite and PhenoCam images. The following animation was made from fisheye images collected nearly daily during the “start of season” (spring) and “end of season” (fall) at our Reston PhenoCam location during the year 2012.
Once the Reston PhenoCam has been operated for a sufficient period, animations showing spring and fall phenology will be posted here (check back often!).
Fall of 2011 at Pinnacles Research Area looking North
(animated gif file - approx. 13 MB)
Fall of 2010 at Pinnacles Research Area looking North
(animated gif file - approx. 8 MB)
Winter, Spring, and Summer of 2009 at Stony Man Mountain, looking north west
(Windows Media Video file - approx. 2 MB)
Fall of 2008 at Stony Man Mountain, looking NW