Future oceans low in oxygen?
Nature Geoscience
2009년1월26일
Continuously high greenhouse gas emissions could lead to long-term oxygen depletion in the global ocean, potentially with significant negative effects on fish and other marine animals for thousands of years.
Online in Nature Geoscience this week, Gary Shaffer and colleagues simulate the effects of human-induced greenhouse gas emissions with a low-complexity Earth system model for 100,000 years into the future. They evaluate two emissions scenarios ? moderate and high emissions ? used by the Intergovernmental Panel on Climate Change (IPCC). In their simulations the surface ocean loses oxygen mainly in response to warming, through a decrease in the solubility of the gas in seawater. However, the deep ocean is also affected ? a result of a slower overturning circulation, compared with today’s climate, which brings oxygenated surface waters to depth.
The researchers conclude that substantial reductions in fossil-fuel use over the next few generations are needed to avoid extensive ocean oxygen depletion.
doi: 10.1038/ngeo420
리서치 하이라이트
-
3월4일
Environment: Reservoirs account for more than half of water storage variabilityNature
-
3월2일
Evolution: Neanderthals may have heard just like usNature Ecology & Evolution
-
3월2일
Geoscience: Earth’s atmosphere may return to low-levels of oxygen in one billion yearsNature Geoscience
-
2월26일
Environment: Shifting from small to medium plastic bottles could reduce PET wasteScientific Reports
-
2월24일
Environment: European forests more vulnerable to multiple threats as climate warmsNature Communications
-
2월11일
Environment: Global CFC-11 emissions in declineNature
