Net ecosystem exchange of carbon dioxide and water of far eastern

• Main Author: M. K. Van Der Molen
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2004
• Subjects: Yakutsk; Siberia
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.2837; http://hal.archives-ouvertes.fr/docs/00/29/75/05/PDF/bg-1-133-2004.pdf

Abstract. Observations of the net ecosystem exchange of water and CO2 were made during two seasons in 2000 and 2001 above a Larch forest in Far East Siberia (Yakutsk). The measurements were obtained by eddy correlation. There is a very sharply pronounced growing season of 100 days when the forest is leaved. Maximum half hourly uptake rates are 18 µmol m −2 s −1; maximum respiration rates are 5 µmol m −2 s −1. Net annual sequestration of carbon was estimated at 160 gCm −2 in 2001. Applying no correction for low friction velocities added 60 g C m −2. The net carbon exchange of the forest was extremely sensitive to small changes in weather that may switch the forest easily from a sink to a source, even in summer. June was the month with highest uptake in 2001.