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 Nitrogen Regulation of Carbon Sequestration in Terrestrial Ecosystems in Respons

Impacts of High CO2 on Ecosystemsby Yiqi Luo

A highly controversial issue in global change research is the regulation of terrestrial carbon (C) sequestration by soil nitrogen (N) availability. The Third Assessment IPCC Report predicts rising atmospheric CO2 alone could stimulate terrestrial carbon (C) sequestration by 350 – 980 Pg (=1015 g) C in the 21st Century. Sequestering 350 – 980 Gt C in terrestrial ecosystems requires 7.7 – 37.5 Pg (N) based on a stoichiochemical relationship that approximately 0.005 g N is required for 1 g C stored in long-lived plant biomass (i.e., wood) and 0.067 g N for 1 g C sequestered in soil organic matter (SOM). Thus, to realistically predict future C sequestration in terrestrial ecosystems, we have to understand how closely C and N processes are coupled in response to rising Ca.

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Re: Nitrogen Regulation of Carbon Sequestration in Terrestrial Ecosystems in Respons (Score 1)
by Martin.Heimann on Friday, September 30 @ 09:30:36 MDT
(User Info)http://www.bgc-jena.mpg.de/~martin.heimann
Very nice talk - thanks! Did you in the metaanalysis also try to stratify the data according to length of the experiments? Are there shifts in the "central tendencies" if you compare longer experiments to short experiments? 






The 7th International CO2 Conference

The Omni Interlocken Resort
September 25th - 30th
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