Egor A. Dyukarev

Institute of Monitoring of Climatic and Ecological Systems, Russian Academy of Sciences · Laboratory of Physics of Climatic Systems

Aim: The paper presents the results of the study of the dynamics of methane and carbon dioxide fluxes for the ridge-hollow oligotrophic bog complex in the middle taiga subzone of Western Siberia. Correlations between carbon dioxide and methane fluxes were revealed and the influence of meteorological parameters on greenhouse gas fluxes was estimated...

This article presents the results of mapping wetland complex types in Tomsk Region based on cloud-free time series of daily remote sensing (RS) data from the MODIS (Moderate Resolution Imaging Spectroradiometer). These data were utilized to create composite images of the Earth’s surface during periods of snow cover employing the Random Forest ensem...

The carbon reserves (C) and the rates of emission of greenhouse gases (CO₂and CH4) in peat soils of Western Siberia have been studied. The peat soils are typical for region oligotrophic ones (Histosols), but they develop in two contrasting bog ecosystems (a forested bog and an open bog), therefore, they differ significantly in modern vegetation cov...

The accuracy of Land Surface Temperature (LST) products retrieved from satellite data in mountainous-coastal areas is not well understood. This study presents an analysis of the spatial and temporal variability of the differences between the LST and in situ observed air and surface temperatures (ISTs) for the southeastern slope of Lake Baikal’s sur...

The study presents the first results from the multi-platform observational campaign carried out at the Mukhrino peatland in June 2022. The focus of the study is the quantification of spatial contrasts of the surface heat budget terms and methane emissions across the peatland, which arise due to the presence of microlandscape heterogeneities. It is...

For the first time, the information is summarized on the history of establishment, the state of observations and the main scientific results on sites included in RuFlux, the Russian eddy covariance network for the monitoring of greenhouse gases (GHG). Eddy covariance technique provides estimates of GHG fluxes at the level of ecosystems. The long-te...

Soil respiration is an important component of the global carbon cycle and is highly responsive to disturbances in the environment. Human impacts on the terrestrial ecosystem lead to changes in the environmental conditions, and following this, changes in soil respiration. Predicting soil respiration and its changes under future climatic and land-use...

Continuous meteorological variable time series are highly demanded for various climate related studies. Five statistical models were tested for application of temporal gaps filling in time series of surface air pressure, air temperature, relative air humidity, incoming solar radiation, net radiation, and soil temperature. A bilayer artificial neura...

The continuous measurement of CO2 fluxes at the open-top chamber experiment in the ombrotrophic peatland (located in the middle taiga zone, West Siberia, Russia) has been provided during the warm season of 2022 (beginning of June to beginning of October). The R eco, NEE and GPP were calculated for this period; abiotic factors related to CO2 emissio...

Introduction. The concentration of methane in the Earth's atmosphere, the second most potent greenhouse gas, continues to rise since 2007 [Canadell et al., 2021]. The need to significantly reduce the anthropogenic emission of methane into the atmosphere in order to limit the increase in global temperature by 2100 within 2C relative to the period fr...

Palaeoenvironmental reconstructions from peat are strongly focused on ombrotrophic mires, but this study demonstrates that eutrophic mires can also be used. A multi‐proxy approach was applied to a eutrophic mire on a floodplain terrace in the southern taiga of West Siberia. The results of the reconstruction were considered in the wide geographic co...

Изучен температурный режим почв Бакчарского болота и массива песчаных отложений Бадар Тункинской котловины в вегетационный период. Предложена прпметризацич коэффициента температуропроводности для болота в виде кусочно непрерывных функций в виде квадратичного полинома в верхних 5 см почвы и экспоненциальной зависимости ниже 5см, для песчаных отложен...

A dynamic model of biogeochemical carbon cycles in swamp ecosystems is proposed. There are fast and slow biogeochemical cycles. Fast cycles operate in the biosphere and include photosynthesis, vegetative growth, and decomposition. Swamp ecosystems are one of the significant reservoirs of biogeochemical cycles. It is known that huge reserves of carb...

The general heat conductivity equation includes time- and depth-dependent soil properties (soil heat capacity and thermal conductivity). The simplified form of the heat conductivity equation contains only the soil thermal diffusivity parameter. Numerical solutions of the general and simplified equations were compared to quantify the possibility of...

The Pan-Eurasian Experiment (PEEX) Science Plan, released in 2015, addressed a need for a holistic system understanding and outlined the most urgent research needs for the rapidly changing Arctic-boreal region. Air quality in China, together with the long-range transport of atmospheric pollutants, was also indicated as one of the most crucial topic...

The aim of the study was to assess carbon reserves and balance in oligotrophic and eutrophic bogs of the souther- taiga subzone of West Siberia. Location and time of the study. The study was carried out at the field station "Vasyuganye" (56° 57′ N, 82° 30′ E) of the Institute for Monitoring Climatic and Ecological Systems of the Siberian Branch of...

Bias-Corrected Precipitation data over South Siberia (CPSS) contains monthly precipitation data for the area within the coordinates 50–65 N, 60–120 E for the period from January 1979 to December 2019. CPSS data were combined from monthly total precipitation data from ERA5 reanalysis European Centre for Medium-Range Weather Forecasts and precipitati...

The peatlands of the West Siberian Lowlands, comprising the largest pristine peatland area of the world, have not previously been covered by continuous measurement and monitoring programs. The response of peatlands to climate change occurs over several decades. This paper summarizes the results of peatland carbon balance studies collected over ten...

Northern peatlands represent one of the largest carbon pools in the biosphere, but the carbon they store is increasingly vulnerable to perturbations from climate and land-use change. Meteorological observations taken directly at peatland areas in Siberia are unique and rare, while peatlands are characterized by a specific local climate. This paper...

The Pan-Eurasian Experiment (PEEX) Science Plan, released in 2015, addressed a need for a holistic system understanding and outlined the most urgent research needs for sustainable development in the Artic-boreal region. Air quality in China and long-range transport of the atmospheric pollutants was also indicated as one of the most crucial topics o...

Veretennikova E.E. & Dyukarev E.A. 2021: Comparison of methane fluxes of open and forested bogs of the southern taiga zone of Western Siberia. Boreal Env. Res. 26: 43-59. Two bog ecosystems were compared by their ability to release CH 4 into the atmosphere during the warm season, and the influence of environmental factors (water table level and pea...

The accuracy of global hydrometeorological data is important for regional and global climate studies. We compared the ERA5 reanalysis monthly precipitation data of European Centre for Medium-range Weather Forecasts over South Siberia against observed precipitation data records from 132 ground weather stations for 1979–2015. The ERA5 reanalysis prov...

Northern peatlands represent one of the largest carbon pools in the biosphere but the carbon they store is increasingly vulnerable to perturbations from climate and land-use change. Meteorological observations taken directly at peatland areas in Siberia are unique and rare, while peatlands are characterized by a specific local climate. This paper p...

Assessing changes in extreme hydroclimatic phenomena requires accurate precipitation estimates with high temporal and fine spatial resolutions. Significant differences were obtained between reanalysis data and observations at weather stations. Bias correction method applied to ERA5 total precipitation product with spatial resolution 0.25×0.25 ° is...

The thermal regimes of peat and mineral soils differ significantly. Peat soils are characterized by the presence of a surface peat horizon, which is replaced by organogenic rock. The total thickness of the peat layer can reach several meters. The peat strata is a complex organomineral system with specific properties: high water content and porosity...

The results of long-term monitoring of soil temperature regime at Bakchar district (Tomsk region) located in the southern taiga zone of Western Siberia are presented. The temperature regimes of peat and mineral soils are compared; their difference is shown. Peat soil has a smoothed temperature dynamics compared to mineral soil. According to monthly...

The paper summarizes the results of expeditionary studies to study biological productivity, carbon dioxide fluxes in the bog ecosystems of the Central Taiga of Western Siberia. The paper summarizes the results of expeditionary studies to study biological productivity, carbon dioxide fluxes in the bog ecosystems of the Central Taiga of Western Siber...

The results of a study of temperature regimes of oligotrophic bog ecosystems in the south taiga zone of Western Siberia in 2011-2018 are presented. Soil temperature regimes are studied using an atmospheric-soil measuring complex at several depths from the surface to 320 cm. Waterlogged (excessive moisture) and arid years are determined by calculati...

Carbon dioxide fluxes in treed bogs in the South Taiga Zone of Western Siberia are estimated by using field data and a mathematical model calibrated against observation data. Forecasts of carbon balance under climate change are made by using the mathematical model.

Abstarct This paper describes a geophysical observatory in use at the Institute of Monitoring of Climatic and Ecological Systems SB RAS and the data it provides. These data can be used for the development of new parameterizations in an active layer model. This model will allow us to reproduce the physical processes in the soil and on its surface an...

Detailed monitoring of soil temperature provides a unique experimental material for studying the complex processes of heat transfer from the surface layer of the atmosphere to the soil. According to air temperature monitoring data, within each of the key areas there are no significant differences between the data of the observation sites. According...

Current climate changes are characterized by an increase in the frequency of occurrence of extreme natural phenomena, which include droughts and over moistening periods of the territory. The main indicator of drought / over moistening periods is the state of vegetation. Estimation of the interannual and intraseasonal variability of drought can be c...

Рассматривается Бакчарское болото по 4 точкам, 3 из которых осушенных Расчет амплитуд годовых колебаний показал, что температура на осушенных участках болот ниже там, где амплитуда выше, что может быть объяснено влиянием именно этого эффекта, а также на естественном болоте самая большая амплитуда годовых колебаний. Пампинг-эффект в почвах может име...

The continuous field measurements of net ecosystem exchange (NEE) of CO2 were provided at ridge-hollow oligotrophic bog in the Middle Taiga zone of West Siberia, Russia in 2017-2018. The model of net ecosystem exchange of CO2 was suggested to describe the influence of different environmental factors on NEE and to estimate the total carbon budget of...

In this work, we compare the chronologies of H2O and CO2, and total pressure in the vacuum-extracted annual ring disc gas samples of six Scots pine discs in a single region of tree growth; and analyze the results. It is shown that the discs have different annual CO2 distributions, the H2O data weakly correlate with precipitation, but the detected c...

For the first time in Western Siberia, a large-scale study of δ¹³C in oligotrophic Sphagnum mosses is carried out. It is found that mosses of the Sphagnum balticum group and the Shagnum fuscum group have different type of isotopic composition along the meridional gradient. The response of mosses of typical and nontypical habitats to changes in hydr...

Measuring the density, thermal conductivity, and thermal diffusivity of snow is important for modeling the depth of soil freezing/thawing and water balance of the earth's surface. A method of calculating the thermal diffusivity and snow depth refinement based on mathematical modeling is proposed.

Observed and simulated carbon dioxide fluxes in oligotrophic peatlands of West Siberia are discussed. Net ecosystem exchange, gross primary production and ecosystem respiration were measured at ridge-hollow complex at South Taiga zone (Bakchar bog – field sataion “Vasjuganie”) and Middle Taiga zone (Mukhrino bog - field station “Mukhrino”). The mod...

Biotic cycling in ecosystems consists of live organic matter production and dead organic matter destruction. The latter is accompanied by the emission of greenhouse gases into the atmosphere. In peatland landscapes, additional conditions are imposed due to the presence of a water table depth (WTD), under which the destruction is anaerobic with meth...

The ecosystem-atmosphere exchange of methane and carbon dioxide were measured during the summer campaigns 2014 – 2017 in Plotnikovo (N56°51’, E82°51’) on the wetland Flux-NIES automatic chamber complexes. Eleven vegetative groups on the bog’s surface and one lake site were taken in comparison. The objective of these particular measurements was to e...

The paper presents a description of the atmospheric-soil measuring complex (ASMC) intended for mobile and stationary long-term automatic measurements of the basic parameters of the atmosphere, soil and water. The device developed by the Institute of Monitoring of Climate and Ecological Systems of the SB RAS has a number of differences from analogue...

Mathematical model was developed for describing carbon dioxide fluxes at open sedge-sphagnum fen during growing season. The model was calibrated using the results of observations from automatic transparent chamber and it allows us to estimate autotrophic, heterotrophic and ecosystem respiration fluxes, gross and net primary vegetation production, a...

The work presents the results of the study of the peculiarities of the temperature regime in the five basic ecosystems of oligotrophic bogs in the south taiga zone of Western Siberia in 2011-2016. The soil temperature regime was studied using the atmospheric-soil measuring complex at different depths from surface down to 240 cm. All sites were divi...

The work deals with study of peat deposits of oligotrophic bog and spatial distribution of snow cover by geolocation. Data from ground penetrating radar were compared with the data of conventional measurements of a peat depth and snow cover. A fairly good agreement between the thickness of the peat deposits, snow depth by using ground penetrating r...

The results of the study of the peculiarities of the temperature regime in the five basic ecosystems of oligotrophic bogs in the south taiga zone of Western Siberia in 2011-2016 are presented. The soil temperature regime was studied using the atmospheric-soil measuring complex at different depths from surface to 240 cm. All sites were divided into...

________________Sharedit link: https://rdcu.be/blBZL _________________________________ The normalized difference vegetation index (NDVI) is used to estimate the aboveground net production (ANP) of wetland ecosystems for the key area at the South Taiga zone of West Siberia. The vegetation index and aboveground production are related by linear depend...

The work deals with study of peat deposits of oligotrophic bog and spatial distribution of snow cover by geolocation. Data from ground penetrating radar were compared with the data of conventional measurements of a peat depth and snow cover. A fairly good agreement between the thickness of the peat deposits, snow depth by using ground penetrating r...

We investigated the temperature regime of the peat soil in the moss-grass ecosystem of the Bakchar bog massif located in the southern-taiga zone of Western Siberia. Data on soil temperature to a depth of 320 cm were obtained with the atmospheric-soil registration complex for the period from August 1, 2010 to September 24, 2014. The mean annual temp...

A model of net ecosystem exchange (NEE) was suggested to study the influence of different environmental factors and to calculate daily and annual carbon budget. The model uses air temperature, incoming photosynthetically active radiation, vapor pressure deficit, and leaf area index as the explanatory factors for gross primary production, heterotrop...

New data on the diurnal variability of methane emission in summer (2013–2014) from West Siberia peatland ecosystems are presented. It is demonstrated that diurnal variations in methane emission differ much depending on a peatland ecosystem under study. Diurnal variations in methane emission in the fens and hollows of the ridge-hollow complex (RHC)...

Normalized Difference Vegetation Index (NDVI) was used for estimation of wetland ecosystems aboveground net production (ANP) for key area at South Taiga zone of West Siberia. Vegetation index and aboveground production are related by linear dependence and they are specific for each wetland ecosystem. NDVI increases with ANP rise at wooded oligotrop...

The northern Eurasian regions and Arctic Ocean will very likely undergo substantial changes during the next decades. The Arctic–boreal natural environments play a crucial role in the global climate via albedo change, carbon sources and sinks as well as atmospheric aerosol production from biogenic volatile organic compounds. Furthermore, it is expec...

A review of chamber techniques of CO2 fluxes measurements at peatlands

The Northern Eurasian regions and Arctic Ocean will very likely undergo substantial changes during the next decades. The arctic-boreal natural environments play a crucial role in the global climate via the albedo change, carbon sources and sinks, as well as atmospheric aerosol production via biogenic volatile organic compounds. Furthermore, it is e...

The use of satellite images for a comprehensive study of natural objects, including the assessment of the current resource potential of wetlands and speed of peat accumulation is relevant in the study of remote areas of wetlands in Western Siberia. Structure of bog complexes is well reflected in the satellite images due to its indicator properties...

Peculiarities of the regime of seasonally-frozen layer of soil are described using Bakchar (Tomsk oblast) meteorological station daily records for 1963–2011. Relations between seasonally-frozen layer, air temperature and snow cover characteristics are given.

Features of the dynamics of the seasonally frozen layer and climatic characteristics of the cold period of the year were studied using Bakchar weather station observation data for 1963 – 2011. The analysis of monthly data has shown that significant trends in air temperature found for October (0.6 °C/10 yr), February (0.93 °C/10 yr), March (0.7 °C/1...

The Pan-Eurasian Experiment (PEEX) is a new multidisciplinary, global change research initiative focusing on understanding biosphere-ocean-cryosphere-climate interactions and feedbacks in Arctic and boreal regions in the Northern Eurasian geographical domain. PEEX operates in an integrative way and it aims at solving the major scientific and societ...

The Pan-Eurasian Experiment (PEEX) is a new multidisciplinary, global change research initiative focusing on understanding biosphere-ocean-cryosphere-climate interactions and feedbacks in Arctic and boreal regions in the Northern Eurasian geographical domain. PEEX operates in an integrative way and it aims at solving the major scientific and societ...

The Pan-Eurasian Experiment (PEEX) is a new multidisciplinary, global change research initiative focusing on understanding biosphere-ocean-cryosphere-climate interactions and feedbacks in Arctic and boreal regions in the Northern Eurasian geographical domain. PEEX operates in an integrative way and it aims at solving the major scientific and societ...

Presented are the results derived from monitoring the peat soil temperature in the bog located in the zone of the southern taiga of Western Siberia. The temperature regimes of peat soil on the bog and mineral soil in a dry area were compared to show their difference. The peat soil exhibited a smoothed temperature dynamics in contrast to the mineral...

Приводятся результаты мониторинга температуры торфяной почвы болота, расположенного в зоне южной тайги Западной Сибири. Проведен анализ амплитуды суточного хода температуры почвы на разных глубинах в теплое время года и времени наступления максимумов и минимумов температуры в суточном ходе. По затуханию амплитуды суточного хода температуры с глубин...

The influence of various ecological factors (air and soil temperature, atmospheric pressure, level of peatland waters, and the content of CO2 in the atmosphere) on the emission of CO2 from the surface of a peat deposit of an oligotrophic peatland in the south taiga subzone of West Siberia was studied. On the basis of the investigations, day and sea...

Analysis of vegetation cover and tendencies in forest cover changes at a typical site in the south of West Siberia was performed using remote sensing observations from Landsat. The Northern Eurasia Land Cover legend was used for the assessment of unsupervised classification results. The land cover maps constructed have shown that about half of the...