Given your answers to the previous questions, revisit the original question prompt and select the best answer:
Dr. Amy Angert, Dr. Celine Bonfils, and Dr. Inez Fung evaluated the relationship between growing season temperatures, spring CO2 uptake, and total growing season CO2 uptake between 1985 and 2003. Consider their figure and figure caption depicting these data below below.
Figure. Yearly variation in spring and total growing season carbon uptake.
Average values for CO2 uptake and temperature are set to 0 in the anomaly plot. The mean anomalies in CO2 uptake by Northern Hemisphere (>20° latitude) vegetation were calculated for 1985–2003 as parts per million (ppm) CO2 uptake per year
Net spring CO2 uptake during June is shown in the solid green line. Total growing season CO2 uptake from March to August (spring and summer) is shown in the dashed blue line. Anomalies in average growing season temperatures are shown in the solid yellow line (degC). Years with higher average temperatures were associated with earlier timing of budburst.
Given the information in the figure and figure caption, which of the following accurately describes CO2 uptake by the biospheric C pool given the information presented in the figure and caption?
p.s. If you're interesting in why this trend happened, check out the citation! It's interesting stuff :) A. Angert, S. Biraud, C. Bonfils, C. C. Henning, W. Buermann, J. Pinzon, C. J. Tucker, and I. Fung. Proc. Natl. Acad. Sci. U. S. A., 102 (2005), pp. 10823-10827 (original data from this citation)
Elsa E. Cleland, Isabelle Chuine, Annette Menzel, Harold A. Mooney, Mark D. Schwartz, Shifting plant phenology in response to global change, Trends in Ecology & Evolution,22(7) 2007. Redrawn figure from this citation.