Tamara Khodzher

• PhD
• Head of Department at Russian Academy of Sciences

The Baikal region, including areas with poor environmental conditions, has significant clean background zones. In summer of 2023, we analyzed physical and chemical parameters of aerosol particles with different size fractions at Irkutsk and Listvyanka monitoring stations. Reduced wildfires and minimal impact from fuel and energy industries allowed...

The paper presents the results of synchronous measurements of the content of small gas impurities at the three atmospheric monitoring stations located on the shore of Southern Baikal, July 2023. The measurements were carried out using automatic gas analyzers, which enabled to obtain data on the content of sulfur and nitrogen oxides in the atmospher...

This article presents the results of the automatic monitoring of the concentrations of gaseous impurities of sulfur and nitrogen oxides in the ground-level atmosphere of the urban and rural areas in the Southern Baikal region (East Siberia, Russia). The study was conducted from 2020 to 2023 at the urban Irkutsk station and the rural Listvyanka stat...

This work presents the analysis of the spatial distribution of number concentration, size distribution, and chemical composition of aerosol particles measured for the first time over the seas of the Russian Arctic. Various types of vertical distribution of the number concentration were recorded, characteristic of both coastal marine and continental...

In recent years, the role of the atmosphere in the formation of the chemical composition of water in Lake Baikal and its tributaries has been increasing. In this regard, the study of equivalent black carbon (eBC) in the air above the lake and its coast has an important practical application. This paper presents the results of the mass concentration...

The article presents the results of temporal and spatial distribution of aerosol particles and micro-admixtures included into them (polycyclic aromatic hydrocarbons, polychlorinated biphenyls) in the near-water layer of the atmosphere above Lake Baikal obtained during a ship expedition from July 18 to July 24, 2022. During the study period, in the...

Газообразная элементарная ртуть (GEM) является преобладающей формой ртути в атмосфере. В результате осаждения она поступает в наземные и водные экосистемы, где в дальнейшем преобразуется в экотоксикант – метилртуть. Работа посвящена изучению GEM в атмосферном воздухе и общей ртути в атмосферных осадках в Южном Прибайкалье. Отбор проб проводился на...

The machine learning model used to predict ozone concentrations at the Listvyanka monitoring station in the Baikal region is described. The model was trained and verified using automatic ground-based gas analyzer ozone measurements. Random forest and boosting machine learning models were used. According to the ERA5 reanalysis, the mean absolute err...

The paper presents the results of studies of the content of particulate matter PM1-PM10 in the atmosphere of the western coast of Southern Baikal with high temporal resolution. It has been established that PM are emitted into the atmosphere of Southern Baikal from both anthropogenic and natural sources. In winter, the influence of thermal power fac...

The review contains the most significant results of the work of Russian scientists in the field of atmospheric ozone research performed in 2019–2022. It considers observations of tropospheric ozone, its distribution and variability in the territory of the Russian Federation, the relationship with atmospheric parameters, modeling of education proces...

The results of studies of the chemical composition of the snow cover on the northeastern coast of Lake Baikal, the Republic of Buryatia, are presented. Snow samples were taken along the Ulan-Ude – Kurumkan route, in the delta region of the Barguzin River, from the ice of Barguzin Bay and northern Baikal. Groups of sources affecting the compositio...

The paper analyzes the results of automatic monitoring of the content of sulfur dioxide and nitrogen dioxide in the surface layer of the atmosphere of the Baikal region for the period 2021–2022. It was shown that the average daily concentrations of sulfur dioxide varied from 1 µg/m3 to 11 µg/m3 in summer and from 3 µg/m3 to 39 µg/m3 in winter. T...

In this study we present new records of the sulfate concentrations and electrical conductivity (ECM) from three shallow (up to 70 m depth) firn cores – VK16, VK18, VK19 – drilled in the vicinity of Vostok station (central East Antarctica). In the non-sea-salt sulfate and ECM profiles we were able to identify 68 peaks that can be interpreted as trac...

This is the first study of dissolved organic matter (DOM) at the Lake Baikal water-bottom interface. High-resolution profiles of dissolved organic carbon (DOC) were obtained simultaneously with dissolved inorganic carbon (DIC), total dissolved carbon, cations (Na⁺, K⁺, Ca²⁺, Mg²⁺, Fe²⁺, and Mn²⁺), and anions (HCO3⁻, Cl⁻, NO3⁻, and SO4²⁻) in the por...

The results of studying the chemical composition of atmospheric aerosol, precipitation, and snow cover on the territory of the Baikal State Biospherical Nature Reserve during 2017–2021 are presented. The principal ions in atmospheric aerosol and precipitation were sulfates and ammonium and those for snow cover were sulfates, nitrates, and calcium....

This research used the geostatistical analysis of snow cover samples taken in 2017–2022 in the Baikal basin. Groups of snow cover pollution sources were identified by the method of empirical Bayesian kriging (ArcMap software) and mathematical data processing. The studied area was divided into fourteen districts. Geovisualization of marker substance...

В работе впервые с высоким временным разрешением приведены результаты исследований содержания твердых частиц (PM1–PM10) в атмосфере западного побережья южного Байкала. Установлено, что основными источниками поступления РМ в атмосферу Южного Байкала являются как антропогенные, так и природные источники. В зимний период увеличивается влияние теплоэне...

Changes in sea ice conditions and atmospheric circulation over the Southern Ocean play an important role in modulating Antarctic climate. However, observations of both sea ice and wind conditions are limited in Antarctica and the Southern Ocean, both temporally and spatially, prior to the satellite era (1970 onwards). Ice core chemistry data can be...

Представлены результаты исследований химического состава атмосферного аэрозоля, атмосферных осадков и снежного покрова за 2017 - 2021 гг. на территории Байкальского государственного природного биосферного заповедника. Главными ионами атмосферного аэрозоля и атмосферных осадков были сульфаты и аммоний, а снежного покрова - сульфаты нитраты и кальций...

The spatiotemporal distribution of concentrations of trace gases (SO2, NOx, and CO) in the atmospheric surface layer over different areas of the Baikal natural territory is analyzed using the data from seven continuous monitoring stations for 2019-2021. The most contaminated area is the zone of atmospheric influence in the western and northwestern...

The study presents the data on concentrations of polycyclic aromatic hydrocarbons (PAHs), coarse (PM10, PM2.5) and submicron (PM1.0) particles in the atmosphere over the southern Baikal region at two monitoring stations (urban (Irkutsk) and rural (Listvyanka village)) in 2019-2022. Seasonal dynamics and high correlations between their concentration...

An Erratum to this paper has been published: https://doi.org/10.1134/S1024856023330011

Introduction: The products of volcanic eruptions found in the snow, firn and ice deposits of the polar ice sheets are precious sources of information on the volcanic forcing of the climate system in the recent or remote past. On the other hand, the layers containing the traces of well-known eruptions serve as absolute age markers that help to const...

Ozone is one of the most toxic admixtures in the troposphere. Therefore, it is among the main pollutants and its concentration is monitored. This work represents an overview of continuous measurements of the ozone content in the troposphere on the territory of Russia throughout 2021 carried out on an initiative of scientific and educational institu...

Changes in sea ice conditions and atmospheric circulation over the Southern Ocean play an important role in modulating Antarctic climate. However, observations of both sea ice and wind conditions are limited in Antarctica and the Southern Ocean, both temporally and spatially. Ice core chemistry data can be used to reconstruct changes over annual, d...

This study demonstrates a comparative analysis of surface and satellite measurements. The average concentrations of PM2.5 and CO, SO2, measured at the Listvyanka station located on the coast of Lake Baikal, were considered. Satellite measurements data (Copernicus Sentinel-5P) were recomputed based on the SILAM model. A joint analysis of data showed...

We present long-term (2011 2021) data on air mercury monitoring that was started within the GMOS (Global Mercury Observation System) project (2011-2015) at the Listvyanka station located on the shore of Lake Baikal, Siberia. Monitoring shows an obvious seasonal variation in the background mercury concentration in the air, which increases in the col...

The role of the atmosphere in the formation of the chemical composition and quality of water in Lake Baikal and its tributaries has been increasing in recent years. In this regard, studies of the chemical composition of the constituents of the atmosphere have an important practical application. In 2020 and 2021, we studied the chemical composition...

Positive matrix factorization (PMF) is a widely used multivariate source apportionment technique. However, PMF-derived source profiles are never compared to real ones because of the absence of data on the chemical composition of source emissions. The aim of this study was to verify the validity of PMF-derived source profiles using the diagnostic ra...

This article analyses the results of year-round automatic ozone monitoring in seven cities of the Baikal region (southeastern Siberia). We reveal that significant differences in the spatiotemporal variability of the average daily ozone concentrations depend on different anthropogenic loads. In large cities with heavy industry, which are located in...

This article presents the results of the long-term studies at two stations located in the city of Irkutsk and the Listvyanka settlement of the southern Baikal region (East Siberia) concerning the concentration of polycyclic aromatic hydrocarbons (PAHs) in atmospheric aerosol. The studies revealed the seasonal and interannual dynamics in the distrib...

The atmosphere over Lake Baikal covers a vast area (31,500 square meters) and has more significant differences in the composition and variability of gaseous and aerosol components in atmospheric air than in coastal continental areas and is still a poorly studied object. In recent years, the anthropogenic impact on the ecosystem of Lake Baikal has b...

The elemental composition of aerosol in the atmosphere of the research station Ice Base “Baranov Cape” on 2017- 2020 measurements was studied. The elements, most prevalent in the earth’s crust, dominate in the composition of aerosol. The seasonal and annual variability of the concentrations of elements in the composition of aerosol is shown. During...

The aim of this study was to identify particulate matter (PM) sources and to evaluate their contributions to PM in the snowpack of three East Siberian cities. That was the first time when the PM accumulated in the snowpack during the winter was used as the object for source apportionment study in urban environment. The use of long-term integrated P...

A precipitation monitoring station in Listvyanka was set up to determine the potential impact of the coastal area on the state of the adjacent air environment above Lake Baikal on its southwest coast. This article presents the results of studying the chemical composition of atmospheric deposition (aerosols and precipitation) at this station in 2020...

This paper analyzes the results of the automatic (in situ) recording of the regional transport of pollutants from the large regional coal-fired thermal power plants in the atmospheric boundary layer above the southern basin of Lake Baikal. Due to high stacks (about 200 m), emissions from large thermal power plants rise to the altitudes of several h...

Polycyclic aromatic hydrocarbons (PAHs) were detected in different types of PAH-containing samples collected in Lake Baikal during wildfires in the adjacent areas. The set of studied samples included the following: (i) water from the upper layer (5 m); (ii) water from the surface microlayer; (iii) water from the lake tributaries; (iv) water from de...

The monograph "The Barents Sea System" is a continuation of a series of collective monographs devoted to systemic four-dimensional ("4-D oceanology") studies of the seas of the European part of Russia (White, Baltic, Black and Caspian), published in 2010–2018. All these monographs are linked by one idea and a single methodology. The new monograph p...

Lake Baikal is the biggest reservoir of fresh water with unique flora and fauna; presently it is negatively affected by climate change, water warming, industrial emissions, shipping, touristic activities, and Siberian forest fires. The assessment of air pollution - related Baikal's ecosystem damage is an unsolved problem. Ship, based expedition exp...

In 1996, Lake Baikal was declared a UNESCO World Heritage Site. It contains nearly 25% of the world’s fresh surface water. In recent years, anthropogenic impacts on the ecosystem of Lake Baikal have been increasing due to the development of industry in the region, expansion of the tourist infrastructure, and recreational areas of the coastal zone o...

The GMOS (Global Mercury Observation System) project has the overall goal to develop a coordinated observing system to monitor mercury on a global scale. Here we present the long-term (2011–2020) air mercury monitoring data obtained at the Listvyanka station located at a shore of Lake Baikal, Siberia. The long-term monitoring shows obvious seasonal...

Central Antarctica is characterized by a crucial lack of information on climate variability during the late Holocene. The study of firn cores obtained from the central part of the East Antarctic Ice Sheet is essential for the reconstruction of the paleoclimatic conditions at the continental and regional scales over the past 2,000 years (the Late Ho...

The article analyzes the chemical composition (ions, elements, and polycyclic aromatic hydrocarbons) of the atmospheric aerosol in the near-water layer of the atmosphere above Lake Baikal during wildfires in Siberia. Aerosol deposition affects the aquatic environment of the watershed basin and the lake itself. The current law on Lake Baikal limits...

The mobile aerosol Raman polarizing lidar LOSA-A2 designed at V.E. Zuev Institute of Atmospheric Optics SB RAS is presented. Its main technical specifications are given. The lidar carries out sounding of the atmosphere of a Nd:YAG laser at two wavelengths, 1064 nm and 532 nm. Optical selection of lidar signals at these wavelengths is performed by t...

Lake Baikal is the worlds largest unique freshwater body that more than 2600 species of various organisms inhabit, 70% of which are endemic. In recent decades, with climate change, a decrease in the humidity in the watershed area and the inflow of water to the lake, the discharge of insufficiently treated wastewater, the intensification of tourist...

This work presents the results of the study of the ionic concentration and acidity of atmospheric precipitation in the city of Irkutsk and the Listvyanka settlement (the Southern Baikal region, Russia) from 2014 to 2019. Comparison of their chemical composition indicated that the precipitation in Listvyanka is less mineralized and more acidified. T...

From 24 July to 4 August 2019 onboard the research vessel Akademik V.A. Koptyug, we conducted comprehensive studies of gas impurities and aerosol in the atmosphere above the water area of Lake Baikal during wildfires that enveloped large areas of Siberia. During the smog above the lake, all analysed parameters in the atmosphere became several times...

The average long-term ratios of biogenic elements in atmospheric precipitation and the surface layer of lake water in the cold and warm seasons are analysed. It is shown that the role of atmospheric precipitation in the formation of primary lake production may be underestimated. Directions for more detailed research of the role of atmospheric nitro...

This work presents the chemical composition of snow from the Baikal region in 2019. We analyzed snow sampled along the Irkutsk-Listvyanka highway, in the delta of the Selenga River and the Baikal State Nature Biosphere Reserve. We studied the spatial distribution of sulfates and nitrates from large industrial centres in the south of the Irkutsk Reg...

Dissolved organic matter (DOM) simultaneously with dissolved inorganic carbon (DIC), dissolved total carbon (TC) and cations (Na+, K+, Ca2+, Mg2+, Fe2+ and Mn2+) in sediment pore waters from Lake Baikal was investigated. That is the first detailed study of a relatively highly resolved DOC profile in benthic pore water profile from the Lake Baikal....

The article presents the results of continuous automatic monitoring of atmospheric transport of pollutants in the source area of the Angara river (South Baikal) at the "Listvyanka" atmospheric monitoring station in 2019-2020. The temporal variability of the concentrations of oxides of sulfur, nitrogen, and mercury in the atmosphere of the сentral e...

The authors present the results of high resolution chemical studies of snow cover from pits and cores along the ice flow lines from Ridge B to Lake Vostok across its southern (profile VFL) and northern (profile NVFL) parts. The sampling was performed between 2006–2013 during the seasonal 52nd–57th Russian Antarctic expeditions (RAE). Chemical signa...

Forest ecosystems play an important role in the process of removing trace gases from the atmosphere. The purpose of this work is the experimental study of the flux and rate of the dry deposition of ozone on different types of vegetation in the Baikal region. Based on the eddy covariance method and the flux gradient methods (including the aerodynami...

The article considers the results of experimental studies of mesoscale processes of atmospheric pollution transfer to the southern Baikal in the system of low-level atmospheric jet flows in the atmospheric boundary layer at heights up to 100–600 m. It is shown that the plumes of atmospheric emissions of large coal-fired power plants can be captured...

In this study, by using ion chromatography, we analyzed the chemical composition of snow deposited in 1976–2012 at three sites within the Indian Ocean sector of East Antarctica (VK-55, SW-42, and PV-10) to establish the relationships between the formation of the chemical composition of snow and varying mechanisms of atmospheric circulation. Dating...

The results of long-term routine measurements of the concentration of major ions in the water of the Lake Baikal pelagic zone, the Angara River source, and main tributaries of the lake are analyzed. The average values of ion concentration in the water column of the lake and in the Angara River obtained for the recent decade are presented and compar...

We discuss the results of measurements in the region of Cape Baranov (the Severnaya Zemlya archipelago) of the set of physicochemical characteristics of atmospheric aerosol: aerosol optical depth, aerosol and black carbon concentrations, elemental and ion compositions of aerosol, organic and elemental carbon contents in aerosol, as well as the isot...