Earth Science Question. I need help. SALINITY OF SEAWATER.?

Question

Name 2 processes that can act to increase the salinity of sea water and 2 processes that can decrease salinity of seawater

Answer 1

Increase: evaporation of sea water.  More salts washed into the ocean or upwelling.

Decrease: Rain, ice melting, other fresh water flowing into the oceans from rivers.

Answer 2

Melting of icebergs and glaciers decreases salinity.

An increased flow of fresh water decreases salinity.

An increase in salinity can occur if evaporation is excessive such as in the Dead Sea.

An increase in salinity can result if more fresh water carrying more dissolved salts empties into a body of salt water.

An increase in salinity can be caused by the eruption of underwater volcanoes.

The Mediterranean Sea is an interesting example of the variation in salinity.  There is a very good site about this-complete with diagrams.  However, it is a pdf file which means I cannot give you a link to it.  So below is a copy and paste portion.  Maybe if you copy the first sentence and put that in google's exact word match, you will be able to find the site.

The circulation in mediterranean seas can be divided into two classes, depending on the

freshwater budget at the surface . If evaporation over the mediterranean sea

exceeds precipitation, freshwater loss in the upper layers increases the density of the surface

waters, resulting in deep vertical convection and frequent renewal of the water below the sill

depth. The circulation at the connection between the mediterranean sea and the ocean basin

consists of inflow of oceanic water in the upper layer and outflow of mediterranean water in

the lower layer. The inflow is driven by the freshwater loss in the mediterranean sea; in

addition, the density difference between the salty mediterranean water and the fresher oceanic

water causes outflow of mediterranean water in the deeper part of the connecting channel

with a compensating inflow above it.