An international research team with partial support from the CPO Modeling, Analysis, Predictions, and Projections program, recently published in Science an assessment of the contributions of regional terrestrial ecosystems to the average sink, recent trend, and interannual variability of atmospheric CO2.
The study, published in Science on May 22, applied an ensemble of ecosystem and land-surface models as well as an empirical gross primary production product to the analysis. They found that highly productive lands, especially tropical forests, heavily influence the average sink, while semi-arid ecosystems, mostly in low latitudes, strongly influence the trend and interannual variability of the atmospheric CO2 sink.
Understanding the role of these semi-arid regions could be essential for predicting interannual and longer-term variations in the land sink and global carbon cycle.
To view the paper in Science, visit: www.sciencemag.org