Monday, October 12, 2009

Nitrogen Cycle: Key Ingredient In Climate Model Refines Global Predictions

To date, climate models ignored the nutrient requirements for new vegetation growth, assuming that all plants on earth had access to as much "plant food" as they needed. But by taking the natural demand for nutrients into account, the authors have shown that the stimulation of plant growth over the coming century may be two to three times smaller than previously predicted. Since less growth implies less CO2 absorbed by vegetation, the CO2 concentrations in the atmosphere are expected to increase.

However, this reduction in growth is partially offset by another effect on the nitrogen cycle: an increase in the availability of nutrients resulting from an accelerated rate of decomposition – the rotting of dead plants and other organic matter – that occurs with a rise in temperature.

Combining these two effects, the authors discovered that the increased availability of nutrients from more rapid decomposition did not counterbalance the reduced level of plant growth calculated by natural nutrient limitations; therefore less new growth and higher atmospheric CO2 concentrations are expected.

This is precisely the problem that Nualgi and Diatoms can tackle very well, by increasing growth of Diatom Algae in any waterbody.

This will take up the excess nutrients and will also capture CO2 and prevent water pollution due to decomposition of plant matter in water and from harmful algal blooms.

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