• [2013-08-09] Seasonal CO2 Amplitude is Growing as More is Added to the Atmosphere
  + http://www.sciencemag.org/content/early/2013/08/07/science.1239207 + http://nsf.gov/news/news_summ.jsp?cntn_id=128720 + http://www.sciencedaily.com/releases/2013/08/130812170338.htm + http://www.nature.com/news/northern-forests-rev-up-carbon-cycle-1.13529 + http://www.eurekalert.org/pub_releases/2013-08/nsf-scd081213.php
  in Tietoukka Monitor > 2013 > 2013-32 with atmospheric_carbon_dioxide boreal_forests carbon_cycle northern_hemisphere seasonal_amplitude

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