AbstractThe analysis of interannual changes in climatic parameters for the Caspian Sea over the period of 1900–2015 revealed their links to the Atlantic and Pacific oceans. For example, a dramatic Caspian Sea level decrease in the 1930s may be connected with the strengthening of eastern wind in the region caused by the weakening of the North Atlantic influence on the timescales of about eight years

AbstractAnthropogenic heat (AH) is an important part of urban surface energy balance. Although AH affects regional climates through changing land-atmosphere interactions, the climate forcing from AH are not usually calculated in state-of-the-art regional climate simulations. In this paper, the spatial pattern of AH in 20 automatic weather station sites in the Beijing municipal administrative area is

AbstractThe review is based on the results of operation of the total ozone (TO) monitoring system in the CIS and Baltic countries that functions in the operational mode at the Central Aerological Observatory (CAO). The monitoring system uses data from the national network equipped with M-124 filter ozonometers being under the methodological supervision of the Main Geophysical Observatory. The quality

AbstractBased on satellite data on sea surface temperature (1985–2018) and surface wind (1992–2017), the parameters of low-frequency variability are calculated and analyzed for the intensity of the Canary, Benguela, Californian, Peruvian, and Chilean upwellings. It is shown that all the analyzed large-scale wind-driven upwellings have intensified in the recent 30 years. The main contribution to this

AbstractThe paper studies seasonal and long-term variability of the number of positive and negative anomalies of total ozone (TO) for the whole globe, the Northern Hemisphere, Russia, and the latitude zone it belongs. Satellite data are used for the research. It is found that the long-term variability of TO is significantly higher than the seasonal one and is caused by the slowest tidal oscillation

AbstractThe major dynamic processes in the Arctic stratosphere in the winter of 2018/2019 and their impact on the troposphere, mesosphere, and ozone layer are analyzed using the NCEP reanalysis and MLS satellite data. Based on the results of simulations with the TRACAO trajectory model, the comparative analysis of stratospheric polar vortex evolution in winters of 2015/2016 and 2018/2019 is performed

AbstractThe results of the numerical simulation of intense convection that caused the tornado in the city of Blagoveshchensk on July 31, 2011 are presented. The WRF-ARW nonhydrostatic mesoscale model on the nested grids with the spacing to 500 m is used for simulations. It is found that the tornado was initiated by the meso-γ vortex associated with a quasilinear convective system at the height of 700–900

AbstractTides play an important role in the mesoscale sea level variability in the Arctic seas. A distinctive feature of tides in this region is the seasonal variability of harmonic constants, which is caused by changes in hydrometeorological conditions during a year. Based on the analysis of long-term hourly sea-level observations in the White, Chukchi, and Laptev seas, the seasonal variability of

AbstractSatellite data on methane concentration in the lower troposphere and the dynamical permafrost model are used to analyze methane emissions in the permafrost zone. The sources of methane generation in different biochemical conditions in the river valleys, thermokarst lakes, wetlands, and lowlands are studied. The statistical relationships between their intensity and air temperature, precipitation

AbstractThe analysis of satellite images revealed by 25% decrease of the Altai mountains’ glaciation area over last 50 years. In 2008–2017, deglaciation rate increased twice. This tendency is in good agreement with an observed increase in the Katun River flow by 9% in 2008–2017 as compared to 1940–1968 (under invariable total precipitation). The analysis of trends of main meteorological parameters

AbstractThe method of stratospheric aerosols (SA) is considered. This is one of the geoengineering methods, which can be used as a supplementary method to stabilize global temperature at the levels accepted by the Paris Agreement in 2015. It is shown that the application of the SA method could keep global temperature at the levels of +2 and +1.5°С above the preindustrial value, which is calculated

AbstractFor two hydrological models, the ECOMAG and SWAP, the hypothesis is checked that a model which has successfully passed the test based on observational data is more efficient for assessing future hydrological consequences of climate change than the models which did not pass the test. The efficiency is evaluated using two criteria: the robustness of a model and the uncertainty of simulation results

AbstractDue to the fact that the recent decades have become the warmest in the history of meteorological observations for the territory of Northern Eurasia, it is relevant to assess the long-term variability of the convective potential of the atmosphere in changing climate. The spatiotemporal dynamics of the characteristics of atmospheric instability and the frequency of occurrence of convective hazards

AbstractA statistical model for the formation of climate-related hazards is proposed. The formation is described by several meteorological variables or applied climatic indices characterizing a calendar year. Their values or data for their calculation are provided by climate monitoring systems. A climate-related hazard arises when these variables or applied climate indices together go beyond their

AbstractA fundamentally new integrated approach to the state activity on the adaptation to changing environmental conditions, namely, the territorial planning of land use is proposed by the example of the Arctic zone of the Russian Federation being the most vulnerable region to climate change. Adaptation measures for natural ecosystems are scientifically grounded for the Arctic region: the prevention

AbstractThe study analyzes modern climate change based on the data of the climate monitoring performed by the Izrael Institute of Global Climate and Ecology. A brief description of the surface climate monitoring database and its real-time updating is given. Changes in surface temperature over the Earth’s land with detailing over the territory of Russia and its regions, as well as changes in the precipitation

AbstractThe feasibility of applying probabilistic regional climate projection approach for mass ensemble simulations at the 25-km resolution across Russia is considered. Major attention is paid to the analysis of future changes in climate indicators of temperature and precipitation conditions, which significantly affect the operation reliability of constructions and technical systems including transport

AbstractTrends in agro-climatic resources and wheat yields in the main grain regions of European Russia are considered. The analysis is based on the results of calculations performed with the Climate–Soil–Yield simulation system. The results reveal a relative decline in climate-driven yields of 10 to 30% over two decades for both winter and spring wheat. Multiple regression equations linking yield

AbstractThe results of streamflow data analysis for 18 mountain catchments in the Yana and Indigirka river basins (1966–2015) with the area from 16.6 to 89600 km2 are presented. The average streamflow increased by 13 mm (54%) is September, by 1.5 mm (57%) in October, by 0.4 mm (59%) in November, and by 0.1 mm (80%) in December on 12, 11, 9, and 7 rivers, respectively. Basically, the streamflow variations

AbstractThe study presents the projected changes in two important agroclimatic parameters, namely, in the annual sum of active temperatures with a threshold of 10°С (SAT) and in annual total precipitation in Russia and neighboring countries. These changes are estimated using climatic data obtained by averaging the simulation results of 31 CMIP5 global climate models under the RCP4.5 moderate scenario

AbstractThe computational setup of assimilation and reanalysis of measurement data on temperature of the upper ground layer and active layer thickness based on the models of various complexity is formulated. A need in applying a dynamic model for this purpose is substantiated. Four types of permafrost with different active layer thickness are distinguished. The model validation based on measurement

AbstractA method for studying stamukhas using the modern field equipment is considered. The peculiarities of morphometric characteristics and parameters of the internal structure of stamukhas are analyzed. The interrelation between the consolidated layer thickness and the accumulated freezing degree days is derived for different seas. The comparative analysis of morphometric characteristics and the

AbstractThis paper continues the research started in [4] that investigates the thundercloud with hail observed over Saint Petersburg on July 22, 2017. The results of numerical simulation of the cumulonimbus cloud using a small-dimensional model are presented. The spatiotemporal variations in the updraft velocity, liquid water content, ice water content, volume charge density, electric field strength

AbstractThe analysis of the results of numerical hydrodynamic modeling of water level and current fluctuations of the Baltic Sea in the periods of floods in the Finland and Riga gulfs is carried out. It is shown that due to the considerable isolation of the sea a great influence on the dynamics of flood waves have the processes they reflect, resulting in a generated progressive-standing waves. During

AbstractThe seasonal and long-term variability of sea ice concentration in the Chukchi Sea in 1997–2016 was analyzed using all available satellite data on sea ice conditions. It is shown that the zone of maximum variability is situated in the areas with the ice concentration equal to (4–6)/10 and follows the displacements of this area: it moves to the north in the first half of the warm season (June–November)

AbstractThe spatiotemporal analysis of the relationship between the total column water vapor in winter and the sea surface temperature anomalies in the equatorial Pacific was performed. It is shown that this relationship is manifested with a delay of not more than a month for the continents located at the middle and high latitudes of the Northern Hemisphere. Depending on the sign of the temperature

AbstractThe statistical characteristics are computed for the number of cloud layers based on radiosonde data from 965 aerological stations located at different latitudes of the globe for the period of 1964–2017 and on the CE method for the determination of cloud boundaries and cloud amount from the temperature and humidity profiles retrieved from radiosonde data. The calculations are performed for

AbstractThe rate of variations in the CO2 concentration in the atmospheric surface layer at different geographic locations in the late 20th century and early 21st century is considered. The series of monthly mean concentration at the GAW (Global Atmosphere Watch) monitoring stations are used. The average rates of CO2 concentration growth and their standard deviations are estimated for 64 stations for

AbstractThe review is compiled on the basis of the results of operation of the total ozone (TO) monitoring system in Russia and neighboring countries functioning in operational mode at the Central Aerological Observatory. The monitoring system uses data from the national network equipped with M-124 filter ozonometers being under the methodological supervision of the Main Geophysical Observatory. The

AbstractThe study presents the results of the monitoring of the isotope composition of precipitation which was performed using the GNIP (Global Network of Isotopes in Precipitation) techniques at Iskor and Kungur stations from December 2016 to June 2018. Data for Perm GNIP station for 1980–1990 are analyzed together with new data. The parameters of the local meteoric water line for the Perm krai are

AbstractField data on the ion composition and mass concentration of aerosol in the rural (Wingene) and urban (Antwerp) regions of Belgium and the results of their thermodynamic analysis are presented. Ammonium nitrate and ammonium sulfate are found to be the major water-soluble components of aerosol particles. The seasonal variability of mass concentration, phase state, and ion composition of aerosol

AbstractThe problem of estimation of average fields of air pollutant concentration based on local measurement data is stated: the problem of the passive location of the atmosphere by wind, or the problem of the fluid location of the atmosphere. The definitions of new functions are given: the average effective field of concentration and the average effective field of sources. The system of integral

AbstractThe accuracy of the ERA-Interim reanalysis data on total atmospheric water vapor is assessed using the AMSR2 (Advanced Microwave Scanning Radiometer 2) measurements. The values of total column water vapor over the open ocean obtained by applying the improved algorithm to the ASMR2 data are used as reference ones to evaluate the quality of water vapor content reproduced by the reanalysis. The

AbstractObservational data from the Roshydromet hydrometeorological stations for 1978–2017, global meteorological network, and objective analysis and reanalysis (NOAA) are used to study the interannual variability of sea surface temperature and air temperature in the coastal and marine areas of the Okhotsk, Japan, Yellow, East China, and South China seas at the modern stage of the warming. Based on

AbstractThe study presents the results of analysis of observational data on total ozone (TO) at the Russian Antarctic stations Mirny, Novolazarevskaya, and Vostok for 1975–2019 and on the research vessels for 2005–2019. A steady trend towards the TO decrease in Antarctic spring was observed till the early 2000s. Currently, there is a tendency of returning TO values to those typical of the period preceding

AbstractThe variability of Antarctic total column ozone in 1980–2018 is considered. The study analyzes trends in Antarctic total column ozone during the study period as well as the physical and chemical processes affecting the seasonal variability of total column ozone. The main attention is paid to the influence of dynamical processes on the stability of the Antarctic polar vortex, to the formation

AbstractDifferent methods for the statistical correction of the forecasts of surface parameters using the COSMO-Ru13-ENA model with the lead time up to 117 hours are considered. The methods include the systematic correction using the data from recent observations at a weather station, the correction based on special neural networks as well as different combinations of these two techniques. The study

It is shown that the snow stake measurements in central Antarctica systematically underestimate the value of the snow build-up. Two methods for the calculation of the corresponding correction to the snow stake measurements at Vostok station are developed to take this underestimation into account. The first method is based on the Sorge’s law to calculate the rate of compaction of snow layers using the

A method for the assimilation of data on sea ice concentration in the NEMO—LIM3 multicategory sea ice model is presented for application in the operational technology of the ocean state diagnosis and forecasting. The method is based on the relaxation procedure for ice concentration in the sea ice model which is used along with the 3DVAR analysis for temperature and salinity of sea water in the ocean

The variability of parameters of the Antarctic ozone anomaly is studied using data of the TOMS/OMI satellite monitoring of the ozone layer, MERRA-2 reanalysis, and balloon sounding of the vertical distribution of ozone and temperature at the South Pole. The dynamic processes in the Antarctic stratosphere which define conditions for the significant ozone layer destruction are analyzed. Despite the decrease

The results of direct measurements of turbulent fluxes at Bellingshausen station (the Antarctic) in the summer of 2002, 2003, 2007, and 2009 are considered. The features of energy exchange are studied for these seasons. The interannual and intraseasonal variability of energy exchange characteristics is investigated. It is found that heat fluxes depend on the surface state and on the wind direction

The paper presents the results of studying the granulometric composition of aerosol in the suspended matter of the surface water layer, and organic compounds (hydrocarbons, lipids, suspended organic carbon, chlorophyll a) in surface water at the sublatitudinal section near the Antarctica coast obtained in 2019 (the 64th Russian Antarctic Expedition). Snow, soil, and moss in the region of Antarctic

The aerosol optical depth of the atmosphere obtained from spectral sun photometer measurements and the integral optical depth determined from standard actinometric observations of direct solar radiation are the parameters of the optical state of the atmosphere. The quantitative estimates of the integral transparency and aerosol optical depth of the atmosphere in Antarctica are presented, their long-term

The results of a detailed hydrological study of the Larsemann Hills Oases (East Antarctica) during field seasons of 2017 to 2019 are presented. The study investigates a variety of lakes’ hydrological regime and the characteristics of outburst floods resulting from the lakes’ water flowing through tunnels in the snow-ice dams. The hydrographs calculated by the mathematical modeling do not generally

The results of mass balance observations of the ice dome and measurements of the active layer thickness on the Fildes Peninsula, King George (Waterloo) Island, Western Antarctica are presented for the period of 2007 to 2019. The dynamics of the main meteorological parameters affecting the active layer thickness is determined. The numerical experiments based on the mathematical model are performed to

The thermohaline structure of water in the Antarctic coastal areas adjoining Molodezhnaya, Novolazarevskaya, and Bellingshausen stations is analyzed using many-hour soundings carried out in March–April 2019 during the 64th Russian Antarctic Expedition on the Akademik Fedorov research vessel. Water masses typical of the Antarctic zone (Antarctic surface, Antarctic shelf, Antarctic winter, upper circumpolar

The Extreme Forecast Index (EFI) calculations are performed using the ECMWF 2-m air temperature forecasts produced in the framework of the Subseasonal to Seasonal (S2S) Prediction Project. Four computation schemes are implemented using empirical and theoretical distributions of heat wave characteristics as well as the one-dimensional test statistics of histograms and linear interpolation formulas.

Data on modern climate and environmental changes in the northwestern region of Russia are compared with the public perception of such changes. The analysis reveals that unusual weather patterns and single extreme events have a deeper impact on the public perception than long-term periods of climate change. The majority of population consider climate and environmental changes locally, do not associate

The results of studying the temporal variability of atmospheric circulation in the Western Arctic (the Norwegian and Barents seas) are presented. The daily dataset of Girs-Vangengeim E, W, and C circulation forms for the period of 1891–2016 is used to describe atmospheric circulation. Special attention is given to the estimation of differences in weather conditions during the modern period of warming

Based on the numerical simulation of water circulation in the Sea of Okhotsk in 1986 to 2015, the impact of deep cyclones on the circulation off the northeastern coast of Sakhalin is studied. The circulation in the Sea of Okhotsk is simulated with the COSMO-Ru-INMOM-CICE model configuration, where the COSMO-Ru and INMOM resolve explicitly the mesoscale atmosphere and ocean dynamics and the CICE resolves

Possible extreme fluctuations of sea level in the area of the Akkuyu nuclear power plant induced by tsunami, wind, waves, and tides are discussed. The probability characteristics of dangerous sea-level rise in the area are estimated using hydrodynamic modeling and historical data.

Data of 137Cs measurements in the Kiev Reservoir after the Chernobyl accident were used for comparison of simulation results of two multi-chamber models of radionuclide migration in reservoirs. One of the models uses two-chamber approach to describe exchange processes between the water column and bottom sediments and the other uses three-chamber approach. It is revealed that the adequate results for

The investigation of atmospheric conditions in the steppe, forest-steppe, and semi-desert zones of Kazakhstan is relevant, the observations of air pollution are carried out in all big settlements. Satellite data are most suitable for solving the problems of quantitative and qualitative assessment of propagation of atmospheric pollutants. The contamination of the atmosphere over large territories which

The number of days with blizzard, the intensity, duration, periods of occurrence, and dynamics of blizzards in the mountain regions of Georgia are investigated using observational data from 20 weather stations. The features of wind and temperature regimes of blizzards are revealed.

Some aspects of long-term variability of temperature extremes on the territory of Russia are considered using average daily surface air temperature data from 367 weather stations over the period of 1960-2016. The number of days with extremely high summer temperature has increased monotonously (with strong peaks in some years) in the European part of Russia since the 1980s; in the Asian part of Russia

The review is based on the results of the operation of the total ozone (TO) monitoring system in Russia and adjoining territories that functions in the operational mode at the Central Aerological Observatory. The monitoring system uses data from the national network equipped with M-124 filter ozonometers being under the methodological supervision of the Main Geophysical Observatory. The quality of

The statistical analysis of thunderstorm activity in the Primorsky krai is carried out using data of weather stations and World Wide Lightning Location Network (WWLLN) for the period of 2009–2018. The WWLLN data reveal that the seasonal variability of thunderstorm activity is characterized by the maxima in June and August and the daily variability is characterized by the maximum at 14:30 local time

The numerical modeling of wind and sea waves with the WAVEWATCH III discrete spectral model is used to analyze their frequency in the range of hazardous values in the Sea of Japan and the Sea of Okhotsk in 1979-2018. It is found that, in most cases, these events are caused by the passage of tropical cyclones. Some long-term trends are revealed in the frequency of hazardous phenomena (wind and sea waves)

The physical mechanisms which led to the explosive consecutive (cascade) cyclogenesis of “the major southern cyclone–the mesocyclone” pair over the Sea of Japan on January 17-21, 2016 are considered. The important role of oceanographic (the thermal state of the northwestern Sea of Japan) and synoptic (the strong cold ultrapolar invasion of Arctic air) factors is demonstrated. The interaction of these

The major air temperature anomalies and extreme hydrometeorological phenomena on the territory of the Volga Federal District against a background of the current climate change are analyzed using weather station data and ERA5 reanalysis. A trend is revealed towards a decrease in the annual number of days with minimum temperature below -20°C and towards an increase in the annual number of days with temperature