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Vegetation Index of Coastal Texas as Seen by FAPAR

29.7N 95.3W

November 18th, 2009 Category: Climate Change

USA - November 10th, 2009

USA - November 10th, 2009

This FAPAR image of the coast of Texas along the Gulf of Mexico shows the area’s vegetation index, which corresponds to the Fraction of Absorbed Photosynthetically Active Radiation (from which its name is derived). Measuring the radiation over land surfaces in this way provides data on the planet’s climate system. To compare this FAPAR image to the original satellite view of this area, please click here.

In FAPAR images, the color spectrum over land runs from red (1.0), to green, to yellow and white (0.0), while bodies of water appear blue. Red regions correspond to agricultural zones for which there is high photosynthetic activity and therefore vegetation productivity, while yellow to white areas indicate a low degree of photosynthetic activity.

Here, some red areas can be seen upon opening the full image, but most of the area appears yellow-green to medium green, or between 0.2 and 0.5 on the numerical scale. Yellow and white areas are also present, indicating low photosynthetic activity, particularly to the south. The city of Houston also stands out as a white area near the coast.

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