Biogeosciences www.biogeosciences.net 1726-4170 1726-4189 4 6 2007 10.5194/bg-4-985-2007 http://www.biogeosciences.net/4/985/2007/ http://www.biogeosciences.net/4/985/2007/bg-4-985-2007.html http://www.biogeosciences.net/4/985/2007/bg-4-985-2007.pdf 985 1003 2007-11-14 The growing season greenhouse gas balance of a continental tundra site in the Indigirka lowlands, NE Siberia M. K. van der Molen michiel.van.der.molen@falw.vu.nl J. van Huissteden F. J. W. Parmentier A. M. R. Petrescu A. J. Dolman T. C. Maximov A. V. Kononov S. V. Karsanaev D. A. Suzdalov Department of Hydrology and Geo-Environmental Sciences, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands Institute of Biological Problems of the Cryolithozone, Russian Academy of Sciences, Siberian Division, 41, Lenin Prospekt, Yakutsk, The Republic of Sakha (Yakutia), 677980, Russian Federation Carbon dioxide and methane fluxes were measured at a tundra site near Chokurdakh, in the lowlands of the Indigirka river in north-east Siberia. This site is one of the few stations on Russian tundra and it is different from most other tundra flux stations in its continentality. A suite of methods was applied to determine the fluxes of NEE, GPP, Reco and methane, including eddy covariance, chambers and leaf cuvettes. Net carbon dioxide fluxes were high compared with other tundra sites, with NEE=−92 g C m−2 yr−1, which is composed of an Reco=+141 g C m−2 yr−1 and GPP=−232 g C m−2 yr−1. 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