EARTH 10 Lecture Notes - Lecture 3: Antarctic Intermediate Water, Antarctic Bottom Water, Weddell Sea
Document Summary
Thermohaline circulation driven by density differences, differences in temp: contact w/atmosphere or other water masses & solar. 34. 72; flows north at depth: antarctic intermediate water: forms just north of acc in antarctic polar. Front zone; most widespread intermediate water in world"s oceans; 2-4 degrees c and 34. 2 salinities: fronts: where different water masses meet. Subtropical front: 40 s: convergence & divergence leads to upwelling- deep ocean water circulating & rising up near continent (nutrients, area between acc & ant. Coastal current: divergence upwelling- one of most productive regions in open ocean in world marine life: earth"s energy mostly comes from sun: small fraction from earth"s interior- Some move poleward until it hits air from poles moving toward equator. Converging causes air to rise (around 60; causes storms: similar movements originating from poles, hadley cells: 0, 30, 60, 90, 0-60: diverging air rises storms, 30-90: converging air sinks dry, antarctica cold bc: Pole position- less direct solar energy due to tilt.
