Articles Tagged: carbon cycle

Carbon Sink Reborn: Oceanic CO2 Uptake Is Back

The Southern Ocean is only 25 percent of the total surface of the world’s oceans, but the finding that it accounts for 40 percent of the global oceanic uptake of that man-made CO2 could impact climate models and helping to insure policy makers fix the right problem, and not simply the problem that environmental groups throw the most money and lawyers at.

Columbia engineers develop new approach to modeling Amazon seasonal cycles

With the rise of CO2 in Earth’s atmosphere, understanding the climate of tropical forests–the Amazon in particular–has become a critical research area. A recent NASA study showed that these regions are the biggest terrestrial carbon dioxide sinks on our planet, absorbing 1.4 billion metric tons of CO2 out of a total global terrestrial absorption of 2.5 billion.

Higher Trophic Levels Overwhelm Climate Change Impacts on Terrestrial Ecosystem Functioning

Forest floor food webs play pivotal roles in carbon cycling, but they are rarely considered in models of carbon fluxes, including soil carbon dioxide emissions (respiration), under climatic warming. Without isolating and including the significant impact of invertebrates, climate models will be incomplete, hindering well-informed policy decisions.

Variations in mid-ocean ridge magmatism and carbon emissions driven by glacial cycles

The same pressure variations that modulate the melting rate could also modulate the depth of the onset of silicate melting. As ice sheets grow and sea level drops, this onset deepens, causing melting at the base of the silicate melting regime. Excess highly incompatible elements like CO2 enter the melt and begin their journey to the ridge axis. Tens of thousands of years later, this additional CO2 flux is emitted into the climate system. Because of its delay with respect to sea-level change, the predicted variation in CO2 emissions could represent a restoring force on climate (and sea-level) excursions.

New research will boost grasp of North American carbon cycle

The researchers will harmonize data about key components of the carbon cycle in Mexico, make the information dovetail with similar data for the U.S., and tie information on both nations to terrestrial and atmospheric models and remote sensing from satellites to see more accurately where information gaps still exist.

New Study Re-writes the Rules of Carbon Analysis: ANU Media Center

A new study published today in Nature Climate Change has found analyses of carbon emissions may be misleading as they failed to include the impacts of policies such as trading schemes, emission caps or quotas. The paper develops a new framework for evaluating the impacts of policy mechanisms in life-cycle analysis and applies it to the issue of whether it is better for the climate to conserve native forests or to harvest them sustainably to produce wood products.

Researcher uses tiny marine microbes to model climate change

Phytoplankton play a fundamental role in regulating Earth’s climate. But figuring out exactly how these organisms contribute to climate change is a tricky undertaking, primarily because they are so diverse: Any given species may have a set of genetic or physical characteristics entirely different from any other, leading to different behaviors and habitats.

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