Biology 2485B Lecture Notes - Lecture 10: Milankovitch Cycles, Emergence, Precautionary Principle
11 Apr 2018
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Document Summary
Reading-the retreat of the athabasca (p. 420-421: athabasca glacier one of 6 valley glaciers that flow like huge rivers of ice. Process is called accumulation when more snow falls than melts and the snow becomes compressed by more snowfall recrystallizes to form glacial ice. If snow fall all melts glacier remains constant size. Sublimation ice evaporates without melting glacier shrinks in size. (ablation loss of ice volume: athabasca glacier is currently losing most of its volume & retreating, researchers think rockies will be ice-free by end of this century. Balancing of energy-same amount of energy that hits the earth get re-radiated so (cid:449)e do(cid:374)"t see huge (cid:272)ha(cid:374)ges i(cid:374) glo(cid:271)al temps. 342 varies across the earth depending on latitude, angle of incidence etc. But over time, we can see larger change in global temps. If there are a lot of prey (rabbits) they will support large predator community (linx) leads to fewer prey which can support fewer predators.
