Experimental Artifacts of Free-Air-C02-Enrichment (FACE) Studies

By | February 24, 2015

face_studies

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In a provocative paper they entitled “Food for Thought: Lower-Than-Expected Crop Yield Stimulation with Rising CO2 Concentrations,” Long et al. (2006)1 suggested that future increases in crop production caused by the fertilization effect of the atmosphere’s rising CO2 concentration may be only half as large as what had long been believed would be the case, due to confounding influences they claimed were inherent in all experimental assessments of the growth-promoting effects of atmospheric CO2 enrichment except those employing Free-Air CO2- Enrichment or FACE technology. Quite to the contrary, however, there is a strong possibility that just the opposite could well be true, i.e., that future increases in crop production caused by the aerial fertilization effect of the atmosphere’s rising CO2 concentration may well be twice as large as what FACE experiments suggest.