Variation of Salinity in both Surface and Bottom Layers in Jiaozhou Bay

Abstract

Abstract Based on the investigation data on Jiaozhou Bay in May and October 1979, the vertical distribution and seasonal variation of salinity in the surface and bottom waters from the inner waters to the outer waters of Jiaozhou Bay were studied, and the seasonal distribution, variation range and horizontal distribution trend of the salinity in surface and bottom layers were determined. The results showed that from May to October, in the waters of Jiaozhou Bay mouth, the inner waters of the bay mouth and the outer waters of the bay mouth, the seasonal change of salinity in both surface and bottom layers from low to high was: autumn and spring. In Jiaozhou Bay, from the inner water area to the outer water area, in May and October, the variation ranges of salinity in surface and bottom layers were basically the same. When the salinity content in surface was relatively low, that of the corresponding bottom layer was relatively low; when the salinity content in surface was relatively high, that of the corresponding bottom layer was relatively high. It showed that the salinity was fully transported to every part of the ocean through horizontal current transport and vertical eddy mixing. In Jiaozhou Bay, from the waters inside the bay mouth to the waters of the bay mouth, the horizontal distribution trends of salinity in the surface and bottom were opposite in May and the consistent in October. In May and October, the horizontal distribution trends of salinity in surface and bottom from the bay mouth to the outside of the bay mouth were consistent. Therefore, from May to October, in the inner waters of Jiaozhou Bay mouth, bay mouth waters and the outer waters of bay mouth, the seasonal variation mechanism of salinity in surface and bottom: both high and low salinity were transported by horizontal currents from the outer water area of the bay mouth to the water area of the bay mouth, and then to the inner water area of the bay mouth, which determined the seasonal variation mechanism of salinity in surface and bottom.