THE PRIMARY RESEARCHES THAT T/P SEA HEIGHT DATA IS USED FOR REVISED GROUND RISE OR FALL AT THE TIDE GAUGE STATION

Abstract

The T/P satellite data-sea surface height anomaly from 1993 to 2001 is used for the analysis of the information of absolute sea-level change on the coast of Shanghai city and Jiangsu province. The information of absolute sea-level change is contrasted with six tide gauge data at the same time and region. The results indicate that the two-month average sea surface change charts were almost equal and isochroous, and the value of rise speed computed of tide gauge was bigger than that computed from satellite data. The coordinate center of satellite altimetry data was the center of Earth so that the difference between value speed of satellite and the value speed of tide gauge station was correlative with the ground fall at tide gauge. It is noteworthy that the sea surface average rise speed value computed of Wusong tide gauge station in Shanghai city corrected by the round fall was 0.43mm/a above that computed from satellite data. The difference of rising speed was 0.95～3.01cm/a between calculation by the five tide gauges stations from Sheyang station to Santiaogang station in Jiangsu province not corrected by the round fall and computed by the satellite data, and the value of rising speed slowly from south to north. The contrast results indicated that the trend of speed of round fall on coast from Sheyang and Santiaogang increased slowly from south to north, the change value probably reached to one centimeter per year.