EPS SCI 15 Lecture 14: Lecture 14
1 Nov 2016
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L e c t u r e 1 4. Sea ice forming (weddell (aabw) & labrador (nadw) Deep water formation: heating, surface ow, thermocline, deep spreading, sinking, cooling. *1000-1500 years for water circulation to complete (around the world) = reason as to why climate change gets commu- nicated all over the planet. Deep currents: sinking of dense water near the poles. Brinickle: heavy column of cold water and ice that moves and traps sea urchins and star sh on its way. *deep/bottom water is a mixture of nadw and aabw. Intermediate waters: water between cold, saline, polar originated waters and surface (salty intermediate water tongue from mediterranean ~unique eco- systems) water getting from deep/intermediate to shallow --> wind. Coastal upwelling: ekman drives water masses away from the shoreline (cali- fornia), seasonal changing in upwelling, coriolis drives ekman = equatorial di- vergence.
