04 - 10/04/10 Variability of temp and salinity in world's...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
10/04/10 Variability of temp and salinity in world's oceans. -Temp and salt control density of seawater. -Low latitudes have warmest water; trade winds from east push warm pools over. -Traces of cold water show that there is circulation -Most saline water 1/2 way between Africa and N and S. America, in centers of N and S Atlantic. -Middle of ocean basin has saltiest water. -N. pole has 3%, Atlantic has 3.7% -Water is evaporated from Atlantic and comes down over Central America land strip to come down as rain in the pacific, more concentrated in Atlantic, less in Pacific. -Poles have melting ice to dilute water. -Water tends to just sit in center of circulating gyres. -Surface ocean (1st 500m) is mixed; temp is same regardless of depth. Thermocline (500m-1250m) rapid water change to colder. -Deep ocean constant cold. -Polar has no mixed layer, no thermocline, all cold. -Temperate- distinct levels. Tropical-slow curve from mixed thru thermocline to deep. -Density increases as water temp decreases and/or salinity increases.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/25/2010 for the course GEOL 107Lxg at USC.

Ask a homework question - tutors are online