根据1981—2005年珠江口海域15个站位的盐度连续观测资料,结合1996年珠江口海域2个站的连续27h观测资料和1998年珠江口海域5个站的丰、平、枯3个水期的盐度周日观测资料,分析珠江口盐度时空变化特征,结果表明:从1981—2005年25a间珠江口盐度尽管年与年之间有升降波动,但总体上没有明显的升高或降低,除极端干旱年外,基本保持稳定。从多次的调查资料来看,珠江口海域表层水体盐度含量最低,底层水体盐度含量最高,呈现明显的梯度现象;并且具有明显的纵向分布,大致为从下游到上游盐度逐渐降低。 According to the continuous observation data of the salinity of 15 stations in the Pearl River Estuary from 1981 to 2005 and the observation data of 27 stations in two stations in the Pearl River Estuary in 1996 and the abundance, The results showed that the salinity of the Pearl River Estuary in the 25th year from 1981 to 2005 did not fluctuate significantly between the years and the year, High or low, with the exception of the extremely dry years, the basic remained stable. According to many survey data, the salinity content of the surface water in the Pearl River Estuary is the lowest, the salinity content of the bottom water is the highest, showing a clear gradient phenomenon, and has obvious longitudinal distribution, which is gradually decreasing from the downstream to the upstream.