A&O SCI M105 Lecture Notes - Lecture 3: Water Mass, Atomic Ratio, Marine Snow
28 Sep 2016
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Document Summary
Summary: lecture 2: observation: concentration of elements in seawater varies by 12 orders of magnitude, model 1: accumulation of elements from rivers. Removal processes are important: model 2: kinetic removal based on concentration. Implies different residence times: some compounds are in steady-state, others not. But why do elements have different residence times: overview: classification of elements, the biological pump (2 box model), the deep ocean. Classification of elements: vertical profiles of elements in the north pacific ocean. What are the different types of elements: classification of elements: Conservative or bio unlimited: not affected by biological activity. Bio limiting and bio intermediate: bio intermediate (associated with biological processes, but not limiting their rates: concentration high in deep, low in surface). Bio-limiting (can limit biological activity: concentration high in deep, low in surface) Around depth 1000m, ocean is out of photozoic zone. At surface of ocean (depth=0), metals are used up.
