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

[Text] / O. V. Sidorova [et al.] // J. Geophys. Res.-Biogeosci. - 2008. - Vol. 113, Is. G2. - Ст. G02019, DOI 10.1029/2007JG000473. - Cited References: 63 . - 13. - ISSN 0148-0227РУБ Environmental Sciences + Geosciences, Multidisciplinary

Аннотация: We related tree ring width (TRW) and isotopic composition (delta(13)C, delta(18)O) of wood and cellulose from four larch trees (Larix cajanderi Mayr.) to climate parameters. The material was sampled in northeastern Yakutia [70 degrees N-148 degrees E] for the recent (AD 1880-2004) and early Medieval (AD 900-1000) periods. During the recent period June, July, and August air temperatures were positively correlated with delta(13)C and delta(18)O of wood and cellulose, while July precipitation was negatively correlated. Furthermore, the vapor pressure deficit (VPD) of July and August was significantly correlated with delta(13)C of wood and cellulose, but VPD had almost no influence on delta(18)O. Comparative analyses between mean isotope values for the (AD 900-1000) and (AD 1880-2004) periods indicate similar ranges of climatic conditions, with the exception of the period AD 1950-2004. While isotopic ratios in cellulose are reliably related to climatic variables, during some periods those in whole wood showed even stronger relationships. Strong positive correlations between delta(18)O of cellulose and Greenland ice-core (GISP2) data were detected for the beginning of the Medieval period (r = 0.86; p 0.05), indicating the reliability of isotope signals in tree rings for large-scale reconstructions.

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Держатели документа:
[Sidorova, Olga V.
Naurzbaev, Mukhtar M.
Vaganov, Eugene A.] Akademgorodok, VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Siegwolf, Rolf T. W.
Saurer, Matthias] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[Vaganov, Eugene A.] Siberian Fed Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Sidorova, O.V.; Siegwolf, RTW; Saurer, M...; Naurzbaev, M.M.; Vaganov, E.A.

[Text] / K. T. Rinne [et al.] // Tree Physiol. - 2015. - Vol. 35, Is. 11. - P1192-1205, DOI 10.1093/treephys/tpv096. - Cited References:61. - This work was supported by Swiss National Science Foundation (REQIP, 206021_128761 to R.T.W.S., 200021_121838, 200020_134864, 206021_128761), Russian Science Foundation (14-14-00295 to A.V.K. and M.V.B.) and Paul Scherrer Institute (Instrumental upgrade funds to R.T.W.S.); N.J.L. acknowledges the UK Natural Environment Research Council (NE/501504), Climate Change Consortium for Wales (C3W) and European Commission 6th Framework Project 'Millennium' (017008). . - ISSN 0829-318X. - ISSN 1758-4469РУБ Forestry

Аннотация: Significant gaps still exist in our knowledge about post-photosynthetic leaf level and downstream metabolic processes and isotopic fractionations. This includes their impact on the isotopic climate signal stored in the carbon isotope composition (delta C-13) of leaf assimilates and tree rings. For the first time, we compared the seasonal delta C-13 variability of leaf sucrose with intra-annual, high-resolution delta C-13 signature of tree rings from larch (Larix gmelinii Rupr.). The trees were growing at two sites in the continuous permafrost zone of Siberia with different growth conditions. Our results indicate very similar low-frequency intra-seasonal trends of the sucrose and tree ring delta C-13 records with little or no indication for the use of 'old' photosynthates formed during the previous year(s). The comparison of leaf sucrose delta C-13 values with that in other leaf sugars and in tree rings elucidates the cause for the reported C-13-enrichment of sink organs compared with leaves. We observed that while the average delta C-13 of all needle sugars was 1.2% more negative than delta C-13 value of wood, the delta C-13 value of the transport sugar sucrose was on an average 1.0% more positive than that of wood. Our study shows a high potential of the combined use of compound-specific isotope analysis of sugars (leaf and phloem) with intra-annual tree ring delta C-13 measurements for deepening our understanding about the mechanisms controlling the isotope variability in tree rings under different environmental conditions.

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Держатели документа:
Paul Scherrer Inst, Lab Atmospher Chem, CH-5232 Villigen, Switzerland.
SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia.
Swansea Univ, Dept Geog, Swansea SA2 8PP, W Glam, Wales.
ETH, Inst Agr Sci, Zurich, Switzerland.

Доп.точки доступа:
Rinne, K. T.; Saurer, M.; Kirdyanov, A. V.; Loader, N. J.; Bryukhanova, M. V.; Werner, R. A.; Siegwolf, R. T. W.; Swiss National Science Foundation (REQIP) [206021_128761, 200021_121838, 200020_134864]; Russian Science Foundation [14-14-00295]; Paul Scherrer Institute; European Commission [017008]

/ O. V. Churakova [et al.] // Dendrochronologia. - 2016. - Vol. 39: Workshop on Current Status and the Potential of Tree-Ring Research in (JAN 20-21, 2015, Krasnoyarsk, RUSSIA). - P51-59, DOI 10.1016/j.dendro.2015.12.008. - Cited References:50 . - ISSN 1125-7865. - ISSN 1612-0051РУБ Plant Sciences + Forestry + Geography, Physical

Аннотация: Tree-ring width and stable isotopic composition are widely used for the reconstruction of environmental conditions. Eco-physiological models simulating delta C-13 and delta O-18 provide tools to constrain the interpretation of measured tree-ring variations and their relationships to environmental variables. Here, we apply biochemical models of photosynthesis and a model of stomatal conductance to simulate the intra-annual dynamics of delta(13) C values in photo assimilates and tree-rings. We use these models to investigate the physiological responses of larch trees growing on permafrost to variability in precipitation and permafrost depth associated with regional temperature and precipitation changes. Tree-ring width, delta C-13 and delta O-18 in wood and cellulose were measured in larch (Larix cajanderi Mayr.) samples from northeastern Yakutia (69 degrees N, 148 degrees E) for the period from 1945 to 2004 and used for comparisons with modeled delta C-13 and delta O-18 data. Mechanistic models that quantify physical and biochemical fractionation processes leading to oxygen isotope variation in organic matter are used to identify source water for trees growing on permafrost in Siberia. These models allowed us to investigate the influence of a variety of climatic factors on Siberian forest ecosystem water relations that impact isotope fractionation. Based on delta C-13 and delta O-18 in tree wood and cellulose measurements as well as outputs from different eco-physiological models, we assume that larch trees from northeastern Yakutia can have limited access to the additional thawed permafrost water during dry summer periods. (C) 2015 Elsevier GmbH. All rights reserved.

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Держатели документа:
Univ Bern, Inst Geol Sci, Dendrolab Ch, CH-3012 Bern, Switzerland.
Swiss Fed Inst Technol, Dept Environm Sci, CH-8092 Zurich, Switzerland.
VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
INRA, UMR ISPA 1391, F-33140 Villenave Dornon, France.
CEA Saclay, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France.
Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
Univ Bern, Inst Phys, Climate & Environm Phys, CH-3012 Bern, Switzerland.
Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland.
Southern Oregon Univ, Dept Biol, Ashland, OR 97520 USA.

Доп.точки доступа:
Churakova, O. V.; Shashkin, Aleksandr V.; Siegwolf, Rolf T. W.; Spahni, Renato; Launois, Thomas; Saurer, Matthias; Bryukhanova, Marina V.; Benkova, Anna V.; Kuptsova, Anna V.; Peylin, Philippe; Vaganov, Eugene A.; Masson-Delmotte, Valerie; Roden, John