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Title: Spatial and temporal variability in forest-atmosphere CO2 exchange

Author: Hollinger, D.Y.; Aber, J.; Dail, B.; Davidson, E.A.; Goltz, S.M.; et al.,;

Date: 2004

Source: Global Change Biology. 10: 1689-1706.

Publication Series: Scientific Journal (JRNL)

Description: Seven years of carbon dioxide flux measurements indicate that a ∼ 90-year-old spruce dominated forest in Maine, USA, has been sequestering 174±46 gCm-2 yr-1 (mean±1 standard deviation, nocturnal friction velocity (u*) threshold >0.25ms-1). An analysis of monthly flux anomalies showed that above-average spring and fall temperatures were significantly correlated with greater monthly C uptake while above-average summer temperatures were correlated with decreased net C uptake. Summer months with significantly drier or wetter soils than normal were also characterized by lower rates of C uptake. Years with above-average C storage were thus typically characterized by warmer than average spring and fall temperatures and adequate summer soil moisture.

Keywords: AmeriFlux, carbon exchange, eddy covariance, long-term measurements

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Hollinger, D.Y.; Aber, J.; Dail, B.; Davidson, E.A.; Goltz, S.M.; et al. 2004. Spatial and temporal variability in forest-atmosphere CO2 exchange. Global Change Biology. 10: 1689-1706.


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