Measurements
of CO2 flux were made by the eddy correlation method over a sub-arctic
black spruce forest in interior Alaska.
Observed CO2 budget were sinks of -531~-247 and -219~0 g CO2
m-2 year-1 during 2003 and 2004, respectively. The broad
range is caused by uncertainty regarding assessment of the nocturnal fluxes. The
sequestration of CO2 during 2004 was limited by high temperature,
drought or low light intensity conditions. The net CO2 flux is in a
delicate balance between two large terms, which would shift from sink to source
due to global warming.
Author: M.Ueyama, Y.Harazono, R.Okada, and A.Miyata (ueyama at iarc dot uaf dot edu)
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