GGR112H5 Lecture Notes - Lecture 12: Landfall, Intertidal Zone, Sea Level Rise
Document Summary
Physical and chemical structure of the ocean: strati ed into 3 zones, mixing zone- can be a few hundred meters deep, well mixed, e ective heat transfer driven by wave action. Important nutrient transfers from deep ocean to near surface marine ecosystem: dissolved gases in the mixing zone o2 and co2 are in uence by biological activity. Phytoplankton consume co2 and produce o2, via photosynthesis: co2 + h2o (cid:15511) ch2o. + o2: thermocline- steep temperature pro le separating deep ocean waters from the mixing zone. This temperature gradient, and increased pressure with depth inhibits convection or vertical mixing: deep water zone, salinity concentration of all solutes such as ba2+, so42-, k+, mg2+, ca2+, na+, cl-, Deep ocean caco3 chemistry: calcium carbonate-rich sediments (caco3) settling from the ocean surface to the deep ocean readily dissolve below a certain depth due to high acidity, called the carbonate. 65 million years, and abrupt climate steps" associated with antarctic and.
