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aerosols:aerosols_land

Land

Meteosat-8 images

8 March 2006 12:00 UTC, dust outbreak over the Sahara.

The desert surface is characterized by very low emissivity at IR8.7μm, we can see it appear darker on the image:

8.7μm brightness temperature

If we make the difference between 8.7μm and 10.8μm we are able to separate the clear-sky regions from the regions with aerosols:

difference image 8.7μm -- 10.8μm

In order to make a reference image with the surface contribution we estimate the surface emissivity from the clear-sky observations:

10.8μm land surface emissivity

aerosols/aerosols_land.txt · Last modified: 2013/10/14 11:04 by aipe