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Climate change and the oceans--what does the future hold?
Jelle Bijma1, Hans-O Pörtner, Chris Yesson
1Alfred-Wegener Institute for Polar and Marine Research, Bremerhaven, Germany.
Marine Pollution Bulletin
|August 13, 2013
Summary
The ocean absorbs CO2, leading to acidification and warming, which harms marine life. Urgent emission cuts are needed to prevent irreversible ecosystem damage and extinctions.
Area of Science:
- Marine Biology
- Oceanography
- Climate Science
Background:
- Oceans mitigate climate change by absorbing atmospheric CO2.
- Ocean CO2 absorption causes acidification (lowering pH).
- Ocean warming, freshening, and deoxygenation impact marine ecosystems.
Purpose of the Study:
- To review observed impacts of ocean warming, acidification, and deoxygenation.
- To analyze historical parallels of these stressors.
- To project future ocean ecosystem changes under continued emissions.
Main Methods:
- Literature review of observed oceanographic and ecological changes.
- Analysis of paleoceanographic data and past extinction events.
- Synthesis of current trends to predict future impacts.
Main Results:
- Combined effects of warming, acidification, and deoxygenation severely impact marine flora and fauna.
- Distribution shifts and population declines are widespread.
- Synergistic effects with pollution, eutrophication, and overfishing exacerbate damage.
Conclusions:
- The "deadly trio" of ocean stressors mirrors past events linked to mass extinctions.
- Without significant and immediate carbon emission reductions, severe future impacts on marine biodiversity are projected.
- Urgent climate action is critical to prevent catastrophic marine ecosystem collapse.
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