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...

[Text] / E. A. Vaganova [et al.] // Contemp. Probl. Ecol. - 2008. - Vol. 1, Is. 2. - P168-182, DOI 10.1134/S1995425508020021. - Cited References: 67 . - 15. - ISSN 1995-4255РУБ Ecology

Аннотация: Results of measurements and calculations of carbon budget parameters of forests and swamps of Siberia are reported. The zonal variability of reserves (and an increment in reserves) of carbon in forest and swamp ecosystems is characterized, carbon dioxide fluxes are measured directly by means of microeddy pulsations, and an uncertainty brought into the calculation of carbon budget parameters by forest fires is estimated.

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Держатели документа:
[Vaganova, E. A.
Vedrova, E. F.
Verkhovets, S. V.
Efremov, S. P.
Efremova, T. T.
Onuchin, A. A.
Sukhinin, A. I.
Shibistova, O. B.] RAS, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Kruglov, V. B.] Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Vaganov, E.A.; Vedrova, E.F.; Verkhovets, S.V.; Efremov, S.P.; Efremova, T.T.; Kruglov, V.B.; Onuchin, A.A.; Sukhinin, A.I.; Shibistova, O.B.

[Text] / B. B. Stephens [et al.] // Science. - 2007. - Vol. 316, Is. 5832. - P1732-1735, DOI 10.1126/science.1137004. - Cited References: 32 . - 4. - ISSN 0036-8075РУБ Multidisciplinary Sciences

Аннотация: Measurements of midday vertical atmospheric CO(2) distributions reveal annual-mean vertical CO(2) gradients that are inconsistent with atmospheric models that estimate a large transfer of terrestrial carbon from tropical to northern latitudes. The three models that most closely reproduce the observed annual-mean vertical CO(2) gradients estimate weaker northern uptake of -1.5 petagrams of carbon per year (Pg C year(-1)) and weaker tropical emission of +0.1 Pg C year(-1) compared with previous consensus estimates of -2.4 and +1.8 Pg C year(-1), respectively. This suggests that northern terrestrial uptake of industrial CO(2) emissions plays a smaller role than previously thought and that, after subtracting land-use emissions, tropical ecosystems may currently be strong sinks for CO(2).

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Держатели документа:
Natl Ctr Atmospher Res, Boulder, CO 80305 USA
Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA
Natl Ocean & Atmospher Adm, Boulder, CO 80305 USA
Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France
Tohoku Univ, Ctr Atmospher & Ocean Studies, Sendai, Miyagi 9808578, Japan
Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan
Nagoya Univ, Nagoya Univ, Grad Sch Environm Studies, Nagoya, Aichi 4648601, Japan
Cent Aerol Observ, Dolgoprudnyi 141700, Russia
Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England
Max Planck Inst Biogeochem, D-07701 Jena, Germany
Sukachev Inst Forest, Krasnoyarsk 660036, Russia
CSIRO Marine & Atmospher Res, Aspendale, Vic 3195, Australia
Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA

Доп.точки доступа:
Stephens, B.B.; Gurney, K.R.; Tans, P.P.; Sweeney, C...; Peters, W...; Bruhwiler, L...; Ciais, P...; Ramonet, M...; Bousquet, P...; Nakazawa, T...; Aoki, S...; Machida, T...; Inoue, G...; Vinnichenko, N...; Lloyd, J...; Jordan, A...; Heimann, M...; Shibistova, O...; Langenfelds, R.L.; Steele, L.P.; Francey, R.J.; Denning, A.S.

[Text] / S. G. Conard, G. A. Ivanova // Environ. Pollut. - 1997. - Vol. 98, Is. 3. - P305-313, DOI 10.1016/S0269-7491(97)00140-1. - Cited References: 41 . - 9. - ISSN 0269-7491РУБ Environmental Sciences

Аннотация: Most of the research about the effects of the release of carbon and other chemicals to the atmosphere during forest fir es focuses on emissions from crown fires or slash fires in which a high percentage of the fine fuels are burned However, in many temper-ate and boreal conifer ecosystems, surface fires of varying intensities and severities are an important part of the fire regime. In Russia a large percentage of the area burned in a typical year is in surface fires, which will result in lower carbon emissions than crown fires because of lower fuel consumption. lit Russian boreal for est, different distribution patterns of fire severity across the landscape could produce fourfold differences in carbon release. Furthermore, tree mortality after surface fires is often quite extensive, leading to a pulse in carbon release as needles and other fine fuels fall to the ground and decompose. With extensive tree mortality a decrease in carbon sequestration is expected for several years, until stand level photosynthesis returns to prefire levels. Perhaps the largest potential source of error in estimates of carbon release from biomass fires in Russia is inaccuracy in estimates of burned area. Many published estimates of annual burned area in Russia may be extremely low. On the basis of information on fire return intervals and area of boreal forest, 12 million ha per year may be a reasonable conservative estimate of burned area until better data are available. Based on this estimate, direct and indirect fire-generated carbon emissions from boreal forests worldwide may exceed 20% of the estimated global emissions from biomass burning, making them an important component in understanding global atmospheric chemistry. In considering effects of fire an global atmospheric chemistry, it is important to include the effects of fire severity, postfire mortality, decomposition of fine fuels, and changing postfire vegetation structure as components of fire-induced changes in ecosystem-level carbon flux. But the most important factor may be accurate information on the annual area burned. Levels of carbon storage are likely to be highly sensitive to changes in fire return intervals that result from direct human activities and from climatic changes, making accurate assessments of burned areas and fire severity critical. Strong fire management programs will be key to managing future fire regimes and carbon cycling in Russia's boreal forest. Published by Elsevier Science Ltd.

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Держатели документа:
US Forest Serv, Washington, DC 20250 USA
Russian Acad Sci, Sukachev Forest Inst, Akademgorodok 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Conard, S.G.; Ivanova, G.A.