Correction for “ Variations in atmospheric CO 2 growth rates coupled with tropical temperature , ”

ENVIRONMENTAL SCIENCES Correction for “Variations in atmospheric CO2 growth rates coupled with tropical temperature,” by Weile Wang, Philippe Ciais, Ramakrishna R. Nemani, Josep G. Canadell, Shilong Piao, Stephen Sitch, Michael A. White, Hirofumi Hashimoto, Cristina Milesi, and Ranga B. Myneni, which appeared in issue 32, August 6, 2013, of Proc Natl Acad Sci USA (110:13061–13066; first published July 24, 2013; 10.1073/pnas.1219683110). The authors note that on page 13064, right column, first full paragraph, lines 4–7, “Some of the climatic events linked to such concerns are the severe droughts experienced by the Amazon basin in 2005 and 2010, which reportedly reduced tropical forest NPP by 1.6 to 2.2 PgC/y and increased tree mortality (50, 51)” should instead appear as “Some of the climatic events linked to such concerns are the severe droughts experienced by the Amazon basin in 2005 and 2010, which reportedly reduced tropical forest NPP and increased tree mortality by a total biomass carbon loss of 1.6 to 2.2 PgC (50, 51).” On page 13064, right column, first full paragraph, lines 12–17, “Assuming that the large reductions of tropical NPP reported previously (50, 51) are realistic, the absence of marked variations of the global CO2 growth rate after the 2005 and 2010 Amazon droughts may imply that the drought conditions also coincidently reduced tropical Rh along with NPP, resulting in (relatively) small NEE anomalies” should instead appear as “Assuming that the large reductions of tropical forest biomass reported previously (50, 51) are realistic, the absence of marked variations of the global CO2 growth rate after the 2005 and 2010 Amazon droughts may imply that the drought conditions also coincidently reduced tropical Rh along with NPP, resulting in (relatively) small NEE anomalies.” These changes do not affect the conclusions of the article.