USING THERMAL INFRARED REMOTE SENSING IMAGES TO MONITOR THE SEA SURFACE TEMPERATURE IN EAST SEA REGION, VIETNAM IN JUNE OF 2003, 2006 AND 2009

摘要

Sea Surface Temperature - SST - is one of the environmental and sea water quality group's parameters. The components monitoring and analyzing are necessary to watch the climate change process, ecological sea system change, natural resource management and environment protection. The SST monitoring in Vietnam is currently done by using small boats moving near seaside. Monitored points are sparse in large sea areas with low frequency. Patterns are only collected at unique points and in specific time of year. This paper aims to develop remote sensing method using thermal infrared images. This method has many advantages, for example supplying updated information and covering a large area, so that it is very useful for sea surface temperature monitoring. SeaDAS or Envi software is used in order to extract SST values from level 0 (.PDF) to level 2 (.HDF or GeoTif). SST physical values (from °K to °C) are saved in a single band (32 bit floating-point). Maplnfo or ArcGIS software is used so as to edit and establish the thematic maps of sea surface temperature in East Sea region of Vietnam to the VN-2000 coordinate system according to month or year periods. The paper compares and contrasts the average sea surface temperature in June of 2003, 2006 and 2009. In addition, the sea surface temperature graphs are conducted with the cross-section; as well as the three sea surface temperature maps are established.