摘要
从长江口附近4个验潮站过去20—35年的海面计录分析出海面变化,总趋势是上升的,其量值大约为1.0—1.2mm/a,该速率已相对于吴淞零点地面沉降作了订正。研究结果表明,采用不同方法和采取不同时段作计算,所得结论有一定的差别。我们只采用具有20年以上连续资料的验潮站作计算,它和东海其它站作比较,其变化率是合理的。在厄尔尼诺年,年平均海面下降大约8—10cm,这表明厄尔尼诺现象能使长江口年平均海面发生异常。
The sea level change extracted from tide gauges situated at the mouth of Changjiang River exhibit a general rise of about 1.0-1.2mm/a during the past 20-35 years. The rates of he ground subsidence have been checked in order to ascertain the variation of Woosung Horizontal Zero. The study results suggest that by use of the different analysis methods and different time periods can obtain different conclusions in the estimates- of mean sea level change. Only stations that had 20 or more years of data were used. Thus all the data had a reasonable mean sea level changes compared with the other stations of the East China Sea. In El Nino years, the yearly mean sea level are reduced by about 2-3 cm, it shows that the E1 Nino phenomena induced sea level anomaly at the Changjiang River Estuary.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1991年第4期315-320,共6页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金委(9488007)
中国科学院<87-45-03>项目资助
