ENVS 2270 Lecture Notes - Lecture 5: Dune, Arctogadus Glacialis, Coastal Erosion
6 Dec 2017
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Unit 5: impacts of climate change: (cid:272)ie(cid:374)tists are worries that a (cid:862)deadl(cid:455) trio(cid:863) of threats, (cid:373)ight (cid:271)e respo(cid:374)si(cid:271)le for a (cid:373)ass e(cid:454)ti(cid:374)(cid:272)tio(cid:374) in the oceans, 3 threats are: Anoxia oxygen depletion in water caused by excessive nutrients (particularly nitrogen and phosphorous), decaying algae uses a great amount of oxygen found in the water. Algae feed the coral and the coral provide a habitat. If temperatures increase slightly, algae will leave the coral: not all coral species react in the same way. Ocean acidification: direct result of increasing co2 in the atmosphere, happens when co2 dissolves in the oceans, as atmospheric co2 increases the amount of co2 dissolved in the oceans increases. Leads to ocean acidification: ocean acidification affects organisms. 5. 1 sea-level rise: since 1900 the seas have been rising at a rate of 1 to 2. 5 mm per year, recent satellite data indicate a rate of rise about 3mm/year, total sea level rise has been approx.
