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

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Найдено документов в текущей БД: 9

    Climate induced birch mortality in Trans-Baikal lake region, Siberia
/ V. I. Kharuk [et al.] // For. Ecol. Manage. - 2013. - Vol. 289. - P385-392, DOI 10.1016/j.foreco.2012.10.024. - Cited References: 40. - This research was supported by the SB RAS Program No. 30.3.33, and NASA Science Mission Directorate, Terrestrial Ecology Program. The authors thank Dr. Joanne Howl for editing the manuscript. . - 8. - ISSN 0378-1127
РУБ Forestry

Аннотация: The Trans-Baikal (or Zabailkal'e) region includes the forest-steppe ecotones south and east of Lake Baikal in Russia and has experienced drought for several years. The decline and mortality of birch (Betula pendula) stands within the forest-steppe ecotone Trans-Baikal region was studied based on a temporal series of satellite data, ground measurements, and tree ring analysis. During the first decade of the 21st century birch stands decline and mortality were observed on about 5% of the total area of stands within our 1250 km(2) study area. Birch forest decline and mortality occurs mainly at the margins of stands, within the forest-steppe ecotone on slopes with direct insolation. During the first decade of the 21st century summer (June-August) precipitation was about 25% below normal. Soil water content measurements were lowest within dead stands and highest within healthy stands and intermediate within damaged stands. Drought impact on stands was amplified by an increase in summer air temperatures (+0.9 degrees C) in comparison with the previous decade. Tree ring data of "surviving" and "dead" tree groups showed a positive correlation with summer/annual precipitation and negative correlation with summer air temperatures. Temperature and precipitation extreme anomalies tend to occur in the region with a period of about 27 years. The observed anomaly was the most severe since the beginning of meteorological observations in the year 1900. Data for the other sites showed a positive climate impact on the growth and expansion of Siberian forests. That is, the same species (B. pendula) showed considerable increase (1.4 times both in height and stem volume) during 20th-21st centuries as temperature increased but precipitation remained at adequate levels. (C) 2012 Elsevier B.V. All rights reserved.

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Scopus

Держатели документа:
[Kharuk, V. I.
Oskorbin, P. A.
Im, S. T.
Dvinskaya, M. L.] VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Kharuk, V. I.
Oskorbin, P. A.
Im, S. T.
Dvinskaya, M. L.] Siberian Fed Univ, Krasnoyarsk, Russia
[Ranson, K. J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Oskorbin, P.A.; Im, S.T.; Dvinskaya, M.L.

    Similar patterns of change in stemwood calcium concentration in red spruce and Siberian fir
[Text] / W. C. Shortle [et al.] // J. Biogeogr. - 1995. - Vol. 22: 1st Global Change and Terrestrial Ecosystems Science Conference (MAY 23-27, 1994, WOODS HOLE, MA), Is. 02.03.2013. - P467-473, DOI 10.2307/2845943. - Cited References: 11 . - 7. - ISSN 0305-0270
РУБ Ecology + Geography, Physical
Рубрики:
ACIDIC DEPOSITION
   TRENDS

   IMPACT

   FOREST

Кл.слова (ненормированные):
dendrochemistry -- forest decline -- environmental markers -- wood cations

Аннотация: Changes in stemwood calcium concentration ([Ca]) for the last 120 years occurred in a common pattern for two sample collections of red spruce (n=33 and 20) from the northeastern United States and for one sample collection of Siberian fir (n=20) from southcentral Siberia, Russia. The [Ca] was measured for wood formed during the periods 1871-90, 1891-1910, 1911-30, 1931-50, 1951-70 and 1971-90. For each core, the relative increase or decrease in [Ca] for adjacent periods of wood formation was recorded. The relative frequency of positive change in [Ca] for each period of wood formation was calculated for the three sample collections. Previous research indicated that under equilibrium conditions, [Ca] in stemwood tended to decrease in more recently formed wood, due to declining numbers of Ca binding sites. Consequently, we expected a low frequency of positive changes in [Ca] in successively formed wood. Consistent with expectation, the relative frequency of positive change from the preceding period to the periods 1891-1910, 1911-30, 1931-50, and 1971-90 were low. Contrary to expectation, the frequency of positive increases in [Ca] more than doubled in 1951-70 compared to 1931-50. The frequency of positive increases in the 1951-70 period relative to the preceding period was 48%, significantly greater than all other periods (P less than or equal to 0.01). The frequencies of positive increases for all other periods were not significantly different from each other (overall mean = 21%, SD = 7). This anomaly in the frequency of positive change in [Ca] in wood formed in 1951-70 relative to wood formed in 1931-50 indicated a perturbation in the ion exchange chemistry of stemwood in two widely separated parts of the northern coniferous forest. This anomaly could be due to external or internal factors. Changes in sap chemistry that affected stemwood chemistry could have been due to changes in the rooting zone. Such changes in rooting zone chemistry could result from the atmospheric deposition of ionic pollutants. Other external factors that could cause the observed anomaly include unusual climatic periods or environmental disturbances such as logging or fire. Internal factors that might produce an anomalously high frequency of positive change of [Ca] include heartwood formation, stemwood infection and a hypersensitive response of the tree against infection.

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Держатели документа:
US FOREST SERV,DURHAM,NH 03824
VV SUKACHEV FOREST INST,KRASNOYARSK 660036,RUSSIA

Доп.точки доступа:
Shortle, W.C.; Smith, K.T.; Minocha, R...; Alexeyev, V.A.

    Permafrost and fire as regulators of stream chemistry in basins of the Central Siberian Plateau
[Text] / L. M. Parham [et al.] // Biogeochemistry. - 2013. - Vol. 116, Is. 01.03.2014. - P55-68, DOI 10.1007/s10533-013-9922-5. - Cited References: 33. - This work was supported by joint US-Russia program between the RFBR and CRDF through Grants 10-05-92513 and RUG1-2980-KR-10, ANR, GDRI "CAR WET SIB", Grants RFBR-CNRS 08-04-92495 and BIO-GEO-CLIM of MinObrNauki and BIO-GEO-CLIM of Russian Ministry of Science and Education (14.B25.31.0001). . - 14. - ISSN 0168-2563
РУБ Environmental Sciences + Geosciences, Multidisciplinary

Аннотация: Stream chemistry in permafrost regions is regulated by a variety of drivers that affect hydrologic flowpaths and watershed carbon and nutrient dynamics. Here we examine the extent to which seasonal dynamics of soil active layer thickness and wildfires regulate solute concentration in streams of the continuous permafrost region of the Central Siberian Plateau. Samples were collected from 2006 to 2012 during the frost-free season (May-September) from sixteen watersheds with fire histories ranging from 3 to 120 years. The influence of permafrost was evident through significantly higher dissolved organic carbon (DOC) concentrations in the spring, when only the organic soil horizon was accessible to runoff. As the active layer deepened through the growing season, water was routed deeper through the underlying mineral horizon where DOC underwent adsorption and concentrations decreased. In contrast, mean concentrations of major cations (Ca2+ > Na+ > Mg2+ > K+) were significantly higher in the summer, when contact with mineral horizons in the active zone provided a source of cations. Wildfire caused significantly lower concentrations of DOC in more recently burned watersheds, due to removal of a source of DOC through combustion of the organic layer. An opposite trend was observed for dissolved inorganic carbon and major cations in more recently burned watersheds. There was also indication of talik presence in three of the larger watersheds evidenced by Cl- concentrations that were ten times higher than those of other watersheds. Because climate change affects both fire recurrence intervals as well as rates of permafrost degradation, delineating their combined effects on solute concentration allows forecasting of the evolution of biogeochemical cycles in this region in the future.

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Полный текст,
Scopus,
Scopus

Держатели документа:
[Parham, Lucy M.
McDowell, William H.] Univ New Hampshire, Dept Nat Resources & Environm, Coll Life Sci & Agr, Durham, NH 03824 USA
[Prokushkin, Anatoly S.
Titov, Sergey V.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Pokrovsky, Oleg. S.] Univ Toulouse, CNRS IRD OMP, Geosci Environm Toulouse, F-31400 Toulouse, France
[Grekova, Ekaterina] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Shirokova, Liudmila S.] UroRAS, Inst Ecol Problems North, Arkhangelsk, Russia

Доп.точки доступа:
Parham, L.M.; Prokushkin, A.S.; Pokrovsky, O.S.; Titov, S.V.; Grekova, E...; Shirokova, L.S.; McDowell, W.H.; RFBR; CRDF [10-05-92513, RUG1-2980-KR-10]; ANR; GDRI "CAR WET SIB"; MinObrNauki [RFBR-CNRS 08-04-92495, BIO-GEO-CLIM]; BIO-GEO-CLIM of Russian Ministry of Science and Education [14.B25.31.0001]

    UNDERSTORY VEGETATION COVER COMPONENTS ASSESSMENT IN ANTHROPOGENICALLY DISTURBED BIRCH STANDS OF KRASNOYARSK FOREST-STEPPE
/ I. A. Goncharova, L. N. Skripal'shchikova, A. P. Barchenkov, A. S. Shushpanov // Lesnoy Zh. - 2020. - Is. 1. - С. 75-87, DOI 10.37482/0536-1036-2020-1-75-87. - Cited References:24. - The study was carried out within the framework of the basic research projects of the Sukachev Institute of Forest SB RAS "Biodiversity of Indigenous Coniferous and Derivative Forest Ecosystems" (No. 0356-2016-0301) and "Dynamics of Siberian Forests in a Changing Climate. Monitoring of the Living State, Productivity and Ranges of the Main Forest-Forming Species of Woody Plants" (No. 0356-2018-0739). . - ISSN 0536-1036
РУБ Forestry
Рубрики:
IMPACT
Кл.слова (ненормированные):
Krasnoyarsk forest-steppe -- birch stands -- ground layer -- species -- composition -- anthropogenic factors -- phytomass stock

Аннотация: The vegetation cover characteristics of anthropogenically disturbed birch stands of Krasnoyarsk forest-steppe are studied. The research purpose is to study the current state of under-story vegetation cover of the birch stands, which have been exposed to recreational and anthropogenic impacts for a long time, as well as to assess the degree and nature of its change over the 12-year period since the last research. The studies were carried out on the sample plots laid out in mixed herbs birch stands. Cenosises are characterized by V-VI age classes, II-IV quality classes, and 0.6-0.9 density of stocking. The birch stands are located in the main transfer of Krasnoyarsk industrial emissions. Phytocenoses were under significant anthropogenic and recreational impact for a long time. At each facility, 30 sites (1 m(2) each) were laid, where species composition, horizontal and vertical structure, projective cover and occurrence of undergrowth and forest live cover species were assessed. The comparative analysis of floristic lists was performed using the Sorensen-Czekanowski coefficient (K-sc). The degree of species diversity was estimated by using the Shannon index; the degree of recreational transformation - synanthropization index. Cuttings were taken from 10 sites (20 x 25 cm each) for recording the phytomass stock of forest live cover on each sample area. Plants were cut off at the litter level, sorted by species, dried and weighed. Rating scales of digression were used to study the recreation influence. The degree of anthropogenic impact was determined by the content of toxic ingredients in plants of living ground cover. It is found that the toxic elements concentration in plants does not reach excessive values at which homeostasis disturbance happens. It was concluded that the changes in vegetation cover observed in 2017 in relation to the state of 2005 are more due to recreational than anthropogenic impact; which changed due to the introduction of a new technology at the JSC "RUSAL Krasnoyarsk Aluminum Plant", which made it possible to reduce toxic industrial emissions. According to the study results, the species composition of the undergrowth and forest live cover was determined, the features of its change over a 12-year period were revealed. It is noted that species diversity has decreased and the proportion of synanthropic species has increased across all plots. Total forest live cover phytomass and individual species phytomass are determined at each plot. The regularities of change in different species contribution to the total stock of phytomass, depending on recreational impact changes, were identified. The ground cover recreational digression stages are determined by analyzing the changes in species diversity, the quantitative ratio of ecological-cenotic groups, the structure and the absolute value of phytomass.

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Держатели документа:
RAS, SB, Sukachev Inst Forest, Akademgorodok 50-28, Krasnoyarsk 660036, Russia.
Krasnoyarsk Museum Reg Studies, Ul Dubrovinskogo 84, Krasnoyarsk 660049, Russia.
Reshetnev Siberian State Univ Sci & Technol, Prosp Gazety Krasnoyarskiy Rabochiy 31, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Goncharova, I. A.; Skripal'shchikova, L. N.; Barchenkov, A. P.; Shushpanov, A. S.; project of the Sukachev Institute of Forest SB RAS "Biodiversity of Indigenous Coniferous and Derivative Forest Ecosystems" [0356-2016-0301]; project of the Sukachev Institute of Forest SB RAS "Dynamics of Siberian Forests in a Changing Climate. Monitoring of the Living State, Productivity and Ranges of the Main Forest-Forming Species of Woody Plants" [0356-2018-0739]

    Siberian silkmoth outbreaks surpassed geoclimatic barrier in Siberian Mountains
/ V. I. Kharuk, S. T. Im, V. V. Soldatov // J Mt. Sci. - 2020, DOI 10.1007/s11629-020-5989-3. - Cited References:38. - This study was supported by the Russian Foundation for Basic Research, project nos. 18-45-240003 and 18-05-00432. . - Article in press. - ISSN 1672-6316. - ISSN 1993-0321
РУБ Environmental Sciences

Аннотация: Siberian silkmoth (SSM,Dendrolimus sibiricusTschetv.) is the most important defoliator of Siberian pine (Pinus sibiricaDu Tour) and fir (Abies sibiricaLedeb.) stands. Warming-induced SSM outbreaks are one of the major driving factors of successions within the taiga zone. It is suggested that climate change impacted the SSM range and life cycle. We analyzed the migration of alpine and northerly SSM outbreak boundaries in Siberia and the impact of the climate variables and topography on the outbreak dynamics. We used time-series scenes (multispectral data, and vegetation indexes EVI and NDII) in combination with field studies, climate variables, and GIS techniques. We found that SSM outbreaks in the area of alpine boundary shifted about 370 m uphill since the mid of 1950. The outbreak onset was promoted by increased dryness and active temperatures and decreased root zone moisture content in the spring-early summer period. The terrain topography strongly affected SSM outbreak onset and dynamics. Initially, the outbreak was located at the middle elevations on the gentle concave southeastern slopes, which are the favorable insect habitats between outbreaks. Then the outbreak expanded uphill and downhill, to steeper slopes, and both concave and convex terrains. Alongside with elevation range expansion, SSM surpassed its northern historical outbreak boundary: the potential outbreaks' boundary moved about 300 km northward. Climate warming contributes to SSM migration into former outbreak free conifer stands located in highlands and at northern latitudes.

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Держатели документа:
Russian Acad Sci, Fed Sci Ctr, Sukachev Inst Forest, Siberian Branch, Academgorodok 50-28, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny Str 79, Krasnoyarsk 660041, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsky Rabochy Str 31, Krasnoyarsk 660014, Russia.
Russian Ctr Forest Protect, Academgorodok 50A-2, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Kharuk, Viacheslav, I; Im, Sergei T.; Soldatov, Vladimir V.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-45-240003, 18-05-00432]

    Using an Urban Snow Cover Composition-Based Cluster Analysis to Zone Krasnoyarsk Town (Russia) by Pollution Level
/ A. Onuchin, G. Kofman, O. Zubareva, I. Danilova // Pol. J. Environ. Stud. - 2020. - Vol. 29, Is. 6. - P4257-4267, DOI 10.15244/pjoes/118168. - Cited References:39 . - ISSN 1230-1485. - ISSN 2083-5906
РУБ Environmental Sciences
Рубрики:
SAMPLES
   IMPACT

   TRACE

Кл.слова (ненормированные):
snow cover -- atmospheric pollution -- accumulation -- anthropogenic stress -- cluster analysis -- town zoning

Аннотация: Pollution level and distribution are among key indicators of townspeople's life quality and accurate pollution estimation and town pollution zoning proceeding from these estimates are, therefore, challenging problems to be solved for big cities with highly developed industries. We carried out an integrated assessment of some pollutants for Krasnoyarsk Town using the 2018 snow cover chemical composition data and zoned the town by pollutant accumulation by cluster analysis. The resulting zoning based on the simultaneous use of pollutant-specific data was visualized using GIS and quantitatively confirmed the general public view of most districts of the town as being extremely adverse ecologically. Unlike most studies, where decisions on pollution zone boundaries are either intuitive, or made out of so-called "general considerations", the cluster analysis-based methodology applied in this study enabled to approach this problem algorithmically, i.e. to avoid a priori assumptions. The analysis we carried out based on the results of our original experimental research approach that involved a uniform methodology of snow sampling and analysis in the lab combined with state-of-the-art methods of data processing and result visualization, revealed snow cover to be an informative recorder and effective tool to obtain a picture of integrated pollution of urban areas.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk, Russia.

Доп.точки доступа:
Onuchin, Alexander; Kofman, Gregory; Zubareva, Olga; Danilova, Irina

    Current Trend of Carbon Emissions from Wildfires in Siberia
/ E. Ponomarev, N. Yakimov, T. Ponomareva [et al.] // Atmosphere. - 2021. - Vol. 12, Is. 5. - Ст. 559, DOI 10.3390/atmos12050559. - Cited References:49. - This work was performed using the subject of project no. 0287-2019-0006. This research was partly funded by the Russian Foundation for Basic Research (RFBR) and Government of the Krasnoyarsk krai, and Krasnoyarsk krai Foundation for Research and Development Support, no. 20-44-242002. Grant of Siberian Federal University and Government of the Krasnoyarsk krai, and Krasnoyarsk krai Foundation for Research and Development Support "Long-term consequences of extreme fires in the permafrost zone of Siberia by the materials of satellite monitoring", 2020, no. KF-782 49/20. The data on wildfires was obtained and initially analyzed in 2004-2013 with the support of the NASA Land Cover Land Use Change (LCLUC) and Terrestrial Ecosystems (TE) programs. . - ISSN 2073-4433
РУБ Environmental Sciences + Meteorology & Atmospheric Sciences
Рубрики:
FIRE
   AREA

   RADIATION

   DYNAMICS

   FORESTS

   IMPACT

   SMOKE

Кл.слова (ненормированные):
wildfire -- Siberia -- carbon emissions -- remote sensing

Аннотация: Smoke from wildfires in Siberia often affects air quality over vast territories of the Northern hemisphere during the summer. Increasing fire emissions also affect regional and global carbon balance. To estimate annual carbon emissions from wildfires in Siberia from 2002-2020, we categorized levels of fire intensity for individual active fire pixels based on fire radiative power data from the standard MODIS product (MOD14/MYD14). For the last two decades, estimated annual direct carbon emissions from wildfires varied greatly, ranging from 20-220 Tg C per year. Sporadic maxima were observed in 2003 (>150 Tg C/year), in 2012 (>220 Tg C/year), in 2019 (similar to 180 Tg C/year). However, the 2020 fire season was extraordinary in terms of fire emissions (similar to 350 Tg C/year). The estimated average annual level of fire emissions was 80 +/- 20 Tg C/year when extreme years were excluded from the analysis. For the next decade the average level of fire emissions might increase to 250 +/- 30 Tg C/year for extreme fire seasons, and to 110 +/- 20 Tg C/year for moderate fire seasons. However, under the extreme IPCC RPC 8.5 scenario for Siberia, wildfire emissions might increase to 1200-1500 Tg C/year by 2050 if there were no significant changes in patterns of vegetation distribution and fuel loadings.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Ecol & Environm, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia.
George Mason Univ, Affiliate Fac, Dept Geog & Geoinformat Sci, Fairfax, VA 22030 USA.

Доп.точки доступа:
Ponomarev, Evgenii; Yakimov, Nikita; Ponomareva, Tatiana; Yakubailik, Oleg; Conard, Susan G.; Russian Foundation for Basic Research (RFBR)Russian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk krai; Krasnoyarsk krai Foundation for Research and Development Support [20-44-242002, KF-782 49/20]; Siberian Federal University; NASA Land Cover Land Use Change (LCLUC) programNational Aeronautics & Space Administration (NASA); Terrestrial Ecosystems (TE) program; [0287-2019-0006]

    The Effects of Climate Change on the Hydrological Regime of Northern Rivers in Krasnoyarsk Krai
/ T. A. Burenina, D. A. Prysov, A. V. Musokhranova // Geogr. Natural Resources. - 2021. - Vol. 42, Is. 3. - P282-289, DOI 10.1134/S1875372821030070. - Cited References:27. - The study was supported by the base project of the Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences ("Theoretical Bases for the Preservation of the Environmental and Resource Potential of Siberian Forests amid the Increasing Anthropogenic Pressure and Cli-matic Anomalies"), project no. AAAA-A17-117101940014-9 (0356-2019-0027). . - ISSN 1875-3728. - ISSN 1875-371X
РУБ Geography
Рубрики:
RUNOFF
   IMPACT

Кл.слова (ненормированные):
hydrological regime -- atmospheric precipitation -- runoff dynamics -- climate -- trends -- permafrost -- Central Siberia

Аннотация: The annual runoff dynamics of the studied regional watercourses, as well as the air temperature and precipitation trends, were analyzed in the spatial and temporal aspects to identify the regional and local characteristics of the hydrological regime of rivers in the cryolithozone of Krasnoyarsk krai. Nine river basins located in three landscape zones (forest-tundra, northern taiga, and middle taiga) were selected as test sites. A hydrological and meteorological database was produced using archive materials provided by the Central Siberian Administration for Hydrometeorology and Environmental Monitoring, including long-time river runoff data collected at hydrological stations and air temperature and precipitation data collected at meteorological stations in the studied region. The database was used to develop models that describe the annual river runoff formation in dependence to climatic factors and to analyze the spatiotemporal characteristics of the river runoff formation. It was found that the landscape differentiation of the area affects the spatial distribution of climatic parameters and, accordingly, hydrological regime characteristics. Regression equations describing relationships between river runoff on the one hand and air temperature and precipitation on the other hand were produced for all studied catchment basins. It is established that precipitation and air temperature during the warm period affect the average annual runoff most significantly, while liquid precipitation and air temperature in winter months largely determine the winter low-water runoff. Analysis of linear trends in average annual air temperatures and precipitations shows a steady increase in air temperature since the mid-1950s; while precipitation trends not only differ significantly in absolute values, but are of different signs. Analysis of the annual and minimum winter runoff dynamics in different observation periods performed for the studied rivers shows that most of them demonstrate upward annual runoff trends varying from 0.57 to 4.76 mm/yr. The winter runoff has increased from 0.09 to 1.42 mm/yr. This indicates an overall upward river runoff trend in the studied region. The established multidirectionality of the river runoff and precipitation trends indicates that thawing of perennially frozen grounds caused by the increase in air temperature is becoming an increasingly significant river runoff formation factor in the cryolithozone.

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Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Burenina, T. A.; Prysov, D. A.; Musokhranova, A., V; Sukachev Institute of Forest, Siberian Branch, Russian Academy of SciencesRussian Academy of Sciences [AAAA-A17-117101940014-9 (0356-2019-0027)]

    Wildfire Dynamics along a North-Central Siberian Latitudinal Transect Assessed Using Landsat Imagery
/ Y. Dvornikov, E. Novenko, M. Korets, A. Olchev // Remote Sens. - 2022. - Vol. 14, Is. 3. - Ст. 790, DOI 10.3390/rs14030790. - Cited References:48. - The studies of the key study regions in Vanavara, Igarka, and Turukhansk (field experiments and satellite data analysis conducted by Y.D. and E.N.) were supported by the Russian Science Foundation (grant 20-17-00043). The data analysis for the study area in Tura was conducted by M.K. and supported by the Russian Science Foundation (grant 21-17-00163). The forest inventory data analysis was also conducted by M.K. and supported by the Russian Foundation for Basic Research (grant 20-45-242908). . - ISSN 2072-4292
РУБ Environmental Sciences + Geosciences, Multidisciplinary + Remote Sensing

Аннотация: The history of wildfires along a latitudinal transect from forest-tundra to middle taiga in North-Central Siberia was reconstructed for the period from 1985 to 2020 using Landsat imagery. The transect passed through four key regions (75 x 75 km(2)) with different climate and landscape conditions that allowed us to evaluate regional wildfire dynamics as well as estimate differences in post-fire forest recovery. The Level-2A Landsat data (TM, ETM+, and OLI) were used to derive: (i) burned area (BA) locations, (ii) timing of wildfire occurrence (date, month, or season), (iii) fire severity, and (iv) trends in post-fire vegetation recovery. We used pre-selected and pre-processed scenes suitable for BA mapping taken within four consecutive time intervals covering the entire period of data analysis (1985-2020). Pre- and post-fire dynamics of forest vegetation were described using spectral indices, i.e., NBR and NDVI. We found that during the last three decades, the maximum BA occurred in the southernmost Vanavara region where approximate to 58% of the area burned. Total BA gradually decreased to the northwest with a minimum in the Igarka region (approximate to 1%). Nearly half of these BAs appeared between summer 2013 and autumn 2020 due to higher frequency of hot and dry weather. The most severe wildfires were detected in the most northeastern Tura region. Analysis of NDVI and NBR dynamics showed that the mean period of post-fire vegetation recovery ranged between 20 and 25 years. The time of vegetation recovery at BAs with repeat wildfires and high severity was significantly longer.

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Держатели документа:
Peoples Friendship Univ Russia, Agr Technol Inst, Dept Landscape Design & Sustainable Ecosyst, Moscow 117198, Russia.
Lomonosov Moscow State Univ, Fac Geog, GSP-1,1-12 Leninskie Gory, Moscow 119991, Russia.
Russian Acad Sci, Inst Geog, Staromonetny Lane 29, Moscow 119017, Russia.
Russian Acad Sci, VN Sukachev Inst Forest, KSC SB RAS, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Shirshov Inst Oceanol, Moscow 117997, Russia.

Доп.точки доступа:
Dvornikov, Yury; Novenko, Elena; Korets, Mikhail; Olchev, Alexander; Russian Science FoundationRussian Science Foundation (RSF) [20-17-00043, 21-17-00163, 20-45-242908]