More Signs of Maturing in the Infant Science of Climatology

Global climate models are missing a good chunk of plant information that could significantly alter long-term climate change predictions. A new technique for modeling phytoplankton -- microscopic plants in the upper layers of the Earth's waters -- could reveal a much more accurate picture.

"(Other) modelers have populated their oceans with three or four kinds of plants, said Mick Follows, a researcher in MIT's Program in Atmospheres, Oceans and Climate. "We’ve represented a much more diverse community, and allowed it to have interactions that regulate it more naturally."

Phytoplankton populations are constantly changing, which makes them difficult to predict. So the MIT researchers developed an algorithm using evolutionary principles to more accurately represent the microscopic plants. A more precise count is important because phytoplankton process carbon dioxide -- a significant contributor to global warming.

....Phytoplankton perform two-thirds of all the Earth's photosynthesis -- the process by which plants turn light, nutrients and carbon dioxide into food. The amount of CO2 processed by phytoplankton during photosynthesis affects concentrations of CO2 in the water, which determines how much of the greenhouse gas the oceans can absorb.

Follows and his colleagues created a model ocean seeded with dozens of randomly generated types of phytoplankton. Like the real ocean, the model accounted for variations in light, temperature and food.

Having set the parameters, Follows' team turned the model on. Over 10 simulated years, the digital creatures competed to survive. Some died out, others flourished, and they gradually settled into their respective niches.

Current marine-modeling systems don't factor in the phytoplankton's ever-evolving nature.

Source

See also:

Climatology: Finally Becoming a Science?

Is Climate Science Finally Growing Up?

And other postings with the labels "climate" and "CAGW".