Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

[Text] / E. A. Kozlova [et al.] // Glob. Biogeochem. Cycle. - 2008. - Vol. 22, Is. 4. - Ст. GB4020, DOI 10.1029/2008GB003209. - Cited References: 79. - We thank A. Jordan (MPI-BGC) and D. Worthy (Environment Canada) for their invaluable advice and contribution in establishing GC measurements at ZOTTO, and we thank R. Keeling and his group (SIO) for their help and advice with the OINF2/INF measurements, including the loan of a Servomex OINF2/INF sensor. We are very grateful to E.-D. Schulze (MPI-BGC) for many years of work toward the establishment of ZOTTO station. Many thanks to A. Jordan, W. Brand, F. Hansel, and M. Hielscher (MPI-BGC) for calibration cylinder preparations and to K. Kubler, R. Leppert, S. Schmidt, F. Voigt, B. Schloffel, R. Schwalbe, and U. Schultz (MPI-BGC) for general advice, instrument design and functioning, and logistical and technical support. We thank all employees of the Sukachev Institute of Forest, SB RAS, in Krasnoyarsk, who participated in the site construction, logistics, and maintenance of the measurement system. We also thank all workers from the Russian construction company "Stroitechinvest.'' E. A. K. thanks her supervisor, A. Watson (UEA), for general support and advice. The ZOTTO project is funded by the Max Planck Society through International Science and Technology Center (ISTC) partner project 2757p within the framework of the proposal "Observing and Understanding Biogeochemical Responses to Rapid Climate Changes in Eurasia.'' We are very grateful to Ronnie Robertson from Shetland Islands for the flask samples collection. E. A. K. is supported by a UEA Zuckerman Studentship, and A. C. M. is supported by a U.K. NERC/QUEST Advanced Fellowship (Ref. NE/C002504/1). We also thank three anonymous reviewers for their comments that helped to improve this paper. . - 16. - ISSN 0886-6236РУБ Environmental Sciences + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Аннотация: We present first results from 19 months of semicontinuous concentration measurements of biogeochemical trace gases (CO2, CO, and CH4) and O-2, measured at the Zotino Tall Tower Observatory (ZOTTO) in the boreal forest of central Siberia. We estimated CO2 and O2 seasonal cycle amplitudes of 26.6 ppm and 134 per meg, respectively. An observed west-east gradient of about -7 ppm (in July 2006) between Shetland Islands, Scotland, and ZOTTO reflects summertime continental uptake of CO2 and is consistent with regional modeling studies. We found the oceanic component of the O-2 seasonal amplitude (Atmospheric Potential Oxygen, or APO) to be 51 per meg, significantly smaller than the 95 per meg observed at Shetlands, illustrating a strong attenuation of the oceanic O-2 signal in the continental interior. Comparison with the Tracer Model 3 (TM3) atmospheric transport model showed good agreement with the observed phasing and seasonal amplitude in CO2; however, the model exhibited greater O-2 (43 per meg, 32%) and smaller APO (9 per meg, 18%) amplitudes. This seeming inconsistency in model comparisons between O-2 and APO appears to be the result of phasing differences in land and ocean signals observed at ZOTTO, where ocean signals have a significant lag. In the first 2 months of measurements on the fully constructed tower (November and December 2006), we observed several events with clear vertical concentration gradients in all measured species except CO. During "cold events'' (below -30 degrees C) in November 2006, we observed large vertical gradients in CO2 (up to 22 ppm), suggesting a strong local source. The same pattern was observed in CH4 concentrations for the same events. Diurnal vertical CO2 gradients in April to May 2007 gave estimates for average nighttime respiration fluxes of 0.04 +/- 0.02 mol C m(-2) d(-1), consistent with earlier eddy covariance measurements in 1999-2000 in the vicinity of the tower.

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Держатели документа:
[Kozlova, Elena A.
Manning, Andrew C.] Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England
[Kozlova, Elena A.
Seifert, Thomas
Heimann, Martin] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kisilyakhov, Yegor] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

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Kozlova, E.A.; Manning, A.C.; Kisilyakhov, Y...; Seifert, T...; Heimann, M...