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Unformatted text preview: ce less seawater but the meltwater replaces
the "displaced" seawater.
various model predictions range from 2-5°C warming and a 40 - 200cm
rise in sea level in next 100 years
this is of the same order as the typical tidal reach and sea surface elevation
due to low pressure in a hurricane
consequences: flooding of coastal areas; landward migration of estuaries;
displacement of millions of people 20
18.4 Global Warming and Some Effects Figure 18.x Predictions for increases in natural hazards as a result of global warming. Events will
be spread around the globe and include sea-level rise, ice and snow melt, increases in
precipitation and storm intensity, flooding, rising temperatures, and more droughts and fires.
(source: KB) talk about gas hydrates and tundra! Global Warming and the Oceans - Effects on The Carbon Cycle
Carbon reservoirs on Earth are coupled (see Lecture 22 APPENDIX E)
changes in atmospheric CO2 therefore affect other reservoirs, such as
human CO2 production has actually risen faster than content in atmosphere
-> some CO2 had to have gone somewhere else
evidence points toward oceans
some argue that increase in CO2 in oceans could be beneficial to increase
photosynthesis and plankton production
current estimates are that atmosphere stores about 46% of human
produced CO2, oceans take up 29%, northern hemisphere forest regrowth
7% and other parts in the biosphere 18%
and experiment off Hawaii therefore looks at the possibility of CO2
sequestration into the deep ocean
however, recent findings indicate that oceans instead become more acidic
profound negative impact for coral growth and shell producing life forms 21
18.5 The Kyoto Protocol Figure 18.X CO2 emissions by region. * Includes international aviation and international marine
bunkers, which are shown together as Bunkers. **Calculated using IEA’s energy balances and
the Revised 1996 IPCC Guidelines. CO2 emissions are from fuel combustion only. ***Asia
excludes China(13). (source: IEA) Figure 18.x Gr...
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- Fall '08