Study On The Retrieval And Application Of SST Based On MODIS Data

This paper focuses on the retrieval of Sea Surface Temperature (SST) with Moderate Resolution Imaging Spectroradiometer (MODIS) data and the calculation of sea surface radiation. The main contributions are as follows:1. Analyze in detail the MODIS character, the useage of the 36 channels, the source of the data, data format and the method of looking up MODIS data using the HDF Explorer software. Deal the data with calibrating calculation and get the radiance of thermal infrared channels 31 and 32 of MODIS.2. Calculate the SST of a certain sea area in Taiwan Strait in the whole 2009. Firstly, the brightness temperatures of the thermal infrared channels 31 and 32 of MODIS have been calculated according to the basic theory of thermal infrared radiation. The water vapor content is retrieved by using the near infrared channels 2 and 19 of MODIS and the atmospheric transmittance of the thermal infrared channels 31 and 32 are calculated. Then the SST is retrieved through the brightness temperatures and the atmospheric transmittance of the thermal infrared channels 31 and 32 using the SeaDAS model and the local statistics monitoring model, which are the models of Split-Window Algorithm. The SST retrieved by the two models is compared to the previous measured SST data and analyze the accuracy of the two models. Finally, the SST of the certain sea area in Taiwan Strait in the whole 2009 is retrieved. The SST in the whole 2009, the monthly values are given.3. The model of 2-D JONSWAP spectrum random rough sea surfaces is simulated by using the Monte Carlo method and a retrieved SST is used to calculate the self-radiation of sea surface at different wind speed, band and observing angle.