Internal waves are often observed by satellite remote sensing in South China Sea. In this paper, all ENVISAT ASAR
images and some ERS-2 SAR images from 2005 to 2010, which cover the whole South China Sea, are used to analyze
the spatial and temporal distribution of internal waves. The internal waves' distribution maps of whole South China Sea
will be given year by year from 2005 to 2010. And it shows that internal waves not only occur in the Northern South
China Sea (between Luzon Strait and Hainan Island), also occur in Western South China Sea (along the Vietnamese
coast) and Southern South China Sea. In the Central and Eastern South China Sea, internal wave has not been observed.
And most internal waves are seen in the shallow area. The distribution of observed internal waves is similar every year in
the South China Sea. Internal waves are observed all year, most during summer, least in winter. And internal waves can be seen all days, but most from May to August, least in December and January.