The Terrestrial Carbon Balance of East Asia
Piao, S., Ciais, P., Lomas, M., Beer, C., Liu, H., Fang, J., Friedlingstein, P., Huang, Y., Muraoka, H., Son, Y. and Woodward, I. 2011. Contribution of climate change and rising CO2 to terrestrial carbon balance in East Asia: A multi-model analysis. Global and Planetary Change 75: 133-142.
In a study designed to answer this question for a large portion of the Northern Hemisphere (East Asia, including China, Japan, Korea and Mongolia), the eleven researchers used three process-based ecosystem models -- the Lund-Potsdam-Jena Dynamic Global Vegetation Model (LPJ-DGVM) described by Sitch et al. (2003), the ORganizing Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) model described by Krinner et al. (2005), and the Sheffield model described by Woodward and Lomas (2004) -- to investigate East Asia's net primary productivity (NPP) response to the climatic change and rising atmospheric CO2 concentration of the past century, which they did by running each of the three models from 1901 to 2002, using observed values of monthly climatology and annual global atmospheric CO2 concentrations.
Piao et al. report that between 1901 and 2002, modeled NPP "significantly increased by 5.5-8.5 Tg C per year (15-20% growth)," and they say that this increase in NPP "caused an increased cumulated terrestrial carbon storage of about 5-11 Pg C," about 50-70% of which "is located in vegetation biomass." And they add that "40-60% of the accumulated carbon uptake of the 20th century is credited to the period of 1980-2002."
Interestingly, this latter 22-year interval (which represented only 22% of the full duration of the 101-year study period) was responsible for somewhere between 40 and 60% of the accumulated carbon uptake of the entire period; and this intensified carbon uptake occurred at the end of that period, which climate alarmists contend was the warmest two-decade-interval of that century-long period. Thus, it is readily evident that as the air's CO2 concentration and temperature rose to their highest values of the past century -- or millennium (purportedly) -- they only served to enhance the terrestrial vegetative productivity of East Asia.
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Sitch, S., Smith, B., Prentice, I.C., Arneth, A., Bondeau, A., Cramer, W., Kaplan, J.O., Levis, S., Lucht, W., Sykes, M.T., Thonicke, K. and Venevsky, S. 2003. Evaluation of ecosystem dynamics, plant geography and terrestrial carbon cycling in the LPJ dynamic global vegetation model. Global Change Biology 9: 161-185.
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