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Peng_Wang - receives radiances from these specific...

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1 Homework #3 -- Problem #4 Peng Wang UM/RSMAS MPO Satellite Picture: (From http://podaac.jpl.nasa.gov/AnimationsImages/Images/GulfStream ) The above picture is a sea surface temperature (SST) of Gulf Stream region. From the picture, we can see the Gulf Stream meander and some water rings. The principles of radiation to make this picture are as follows:
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2 (From J. M. Wallace & P. V. Hobbs, Atmospheric Science , P118) According to this picture, we can find the atmosphere window for infrared region of spectrum with wavelength of 3.7 4.1μm and10 12μm, because the atmosphere absorption of infrared at these wavelength is very low, that is, infrared with these wavelength can penetrate atmosphere and be received by satellite radiometer (such as Moderate-resolution Imaging Spectroradiometer (MODIS) and Advanced Very High Resolution Radiometer (AVHRR)). Hence, when radiometer
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Unformatted text preview: receives radiances from these specific wavelength infrared emitted by sea surface, we can use Plank function: (where 2 16 1 10 74 . 3 m W c and K m c 2 2 10 45 . 1 ) to infer sea surface temperature. Actually, since atmosphere and clouds can affect the radiances of sea surface which are received by radiometer, to make the inferred SST close to real SST, we need to eliminate the atmospheric and clouds effect. There are many empirical methods to eliminate these effects. For example, Miami Pathfinder SST (MPFSST) algorithm (O. B. Brown and P. J. Minnett , MODIS Infrared Sea Surface Temperature Algorithm, Algorithm Theoretical Basis Document, Version 2.0, With contributions from: R. Evans, E. Kearns, K. Kilpatrick, A. Kumar, R. Sikorski & A. Závody, April 30, 1999 )....
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