lesson 9: deep ocean circulation

why is there no deep water in pacific ocean

warmer waters in pacific ocean,

ocean is less salty due to bearing strait blocking almost all interchange between arctic and north pacific = less high salinity water being added + lots of rain in the area)

how to identify water masses

T S and DO

how does the conveyor belt work

deep water masses sink from surface → water ahead of it pushed forward → at bottom water travels away from generation region → upwelling brings water back to surface

older water will have

low DO and high CO2

what affects DO in deep waters

cellular respiration/decomposition