A5027243626- Cryospheric studies and observations
- Climate change and permafrost
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Marine and environmental studies
- Arctic and Russian Policy Studies
- Fire effects on ecosystems
- Icing and De-icing Technologies
- Geological Studies and Exploration
- Flood Risk Assessment and Management
- Geotechnical and Geomechanical Engineering
- Tree-ring climate responses
- Atmospheric and Environmental Gas Dynamics
- Aquatic and Environmental Studies
- Methane Hydrates and Related Phenomena
- 3D Surveying and Cultural Heritage
- Karst Systems and Hydrogeology
- Climate variability and models
- Remote Sensing and LiDAR Applications
- Geophysics and Gravity Measurements
- Hydrology and Watershed Management Studies
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
Lomonosov Moscow State University
2014-2023
Moscow State University
2009-2023
Swiss Federal Institute for Forest, Snow and Landscape Research
2004-2005
Cooperative Institute for Research in Environmental Sciences
2001-2002
Russian Academy of Sciences
2002
University of Colorado Boulder
2001
National Research Institute for Earth Science and Disaster Resilience
1999-2000
Institute of Geography
1999-2000
Consumer Healthcare Products Association
1998
Hokkaido University
1998
Abstract Temperature gradient metamorphism is one of the dominant processes changing structure natural dry snow. The snow regulates thermal and mechanical properties. Physical models numerical simulations evolution cover require a thorough understanding interplay between physical heat conductivity were measured simultaneously without disturbance in miniature breeder. was by microtomography, measuring fluxes temperatures. A temperature from 25 to 100 K m −1 applied density range samples...
The relation between heat flow through snow and microstructure is crucial for the comprehension modeling of thermophysical, chemical, mechanical properties snow. This relationship was investigated using flux measurements combined with a microstructural numerical approach. A sample subjected to temperature gradient passing measured. Simultaneously, imaged by X‐ray micro‐tomography. observed ice matrix its conductivity computed finite element method. Comparison measured simulated...
Abstract We present results from cold-laboratory observations of changes in isotopic (δ 18 O and δD) content by sublimation snow ice samples under nearly isothermal conditions. The show large increases observed δ δD within several centimeters the surface. They contradict assumption a non-changing due to layer-by-layer transport mechanisms driven sublimation/desublimation processes. data also do not support idea that firn are limited possibility matrix incorporates atmospheric water vapor...
The rapid warming of the Arctic has led to permafrost degradation, accelerating transport terrestrial materials by rivers. quantitative assessment riverine nutrients and total suspended solids (TSS) flux is important clarify land–ocean connections in Arctic. However, much unknown about estimates these components from direct measurements rivers response degradation. Here, we report results Great Rivers Observatory (Arctic-GRO) for six major (Yenisey, Lena, Ob', Mackenzie, Yukon, Kolyma)...
We present the results of an analysis observed variation in energy balance a soil surface at Barrow, Alaska, during 1993–1998. When combined with snow depth measurements, data allow several stages to be distinguished intraseasonal cover effect on temperature regime and underlying soil. Each stage corresponds specific thermoinsulation effects terms energy‐balance dependence soil‐surface depth. Stages can used as basis for incorporating detailed physics modeling freezing/thawing phenomenon...
Abstract. A 182 m ice core was recovered from a borehole drilled into bedrock on the western plateau of Mt. Elbrus (43°20´53.9'' N, 42°25´36.0'' E; 5115 a.s.l.) in Caucasus, Russia, 2009. This is first region that represents paleoclimate record practically undisturbed by seasonal melting. Relatively high snow accumulation rates at drilling site enabled analysis intraseasonal variability climate proxies. Borehole temperatures ranged −17 °C 10 depth to −2.4 m. detailed radio-echo sounding...
Climate warming leads to vast changes in the land cover types and plant biomass northern high-latitude regions. The overall trend is of shrubland tree lines moving northwards, while different vegetation growth response climate change are largely unknown. Here, we selected areas with latitudes higher than 50°N as study area. We compared type explored relationships between normalized difference index (NDVI) values types, air temperature, precipitation during 1982–2015 based on dynamic grid....
The paper considers the problem of monitoring seasonal variations ground temperature in northern and mountainous areas light ongoing climate changes. To study temperature, a model site Moscow State University Meteorological Observatory was used with ability to monitor air snow cover thickness, freezing depth, which prototype system for state permafrost soils Arctic mountain territories. presents results based on numerical modelling propagation fluctuations 2014-2017 MATLAB environment are...
Abstract. In this study, we present a seasonally resolved accumulation record spanning from 1750 to 2009 Common Era (CE), based on 181.8 m ice core obtained the Elbrus Western Plateau in Caucasus. We implemented various methods account for uncertainties associated with glacier flow, layer thinning, and dating. Additionally, applied novel approach calculate seasonal calendar meteorological data, enabling comparison records. The reconstructed data were compared available gridded precipitation...
Abstract We modified a passive capillary sampler (PCS) to collect snowmelt water for isotopic analysis. Past applications of PCSs have been sample soil water, but the novel aspect this study was placement at ground‐snowpack interface snowmelt. deployed arrays 11 sites in ten partner countries on five continents representing range climate and snow cover worldwide. The PCS reliably collected all caused negligible evaporative fractionation effects samples. is low‐cost, easy install, collects...
Arctic warming leads to permafrost degradation, which can increase ecosystem respiration and release more greenhouse gas into the atmosphere. Meanwhile, climate also promotes plant growth increases carbon assimilation. Presently, it is largely unknown about budget their responses change in regions. In this study, investigate seasonal annual net exchange (NEE), we collected 71 observation stations for (NEE) of CO2 high latitude regions during 2002–2017. The results showed that NEE was −8.2 ±...
Received July 3, 2023; revised September 4, accepted October 2, 2023The isotopic composition (δ18O values) of snow layers, constructing cover to the time reaching maximum water equivalent (SWE), was compared with content precipitated over whole winter season 2018/19 on territory Meteorological Observatory Lomonosov Moscow State University (Moscow, Russia). Snow-sampling carried out in a trench 20 m long simultaneously detailed measurements spatial variability structural characteristics...
The wave‐like temperature and density distributions in snow under an applied gradient, found by Sokratov Maeno [1998], were used to estimate the effective water vapor diffusion coefficient snow. Values obtained (0.6−2.0)×10 −5 m 2 s −1 , lower than air much smaller previous results literature. difference was discussed with use of CO measurements isothermal condition introduction a new parameter, gradient enhancement factor (ƒ). It concluded that is dependent on porosity, tortuosity (т),...
In recent years, the Government of Russian Federation considerably increased attention to exploitation Arctic territories. Simultaneously, evaluation snow avalanches danger was enhanced with aim decrease fatalities and reduce economic losses. However, it turned out that solely reporting degree avalanche is not sufficient. Instead, quantitative information on probabilistic parameters natural hazards, characteristics their effects environment possibly resulting losses increasingly needed. Such...
Abstract Results of wind-tunnel investigations the propagation air within snow showed that process responsible for causing horizontal flux in pore space was not necessarily related to specific surface topography. The reasons this formation are: (i) near-surface wind characteristics, such as frequency pressure variation turbulent character wind; (ii) structure snow, exchange between atmosphere and space; (iii) temperature difference atmosphere, forming air-density which augments or decreases...
[1] In the paper “Intraseasonal variation in thermoinsulation effect of snow cover on soil temperatures and energy balance” by S. A. Sokratov R. G. Barry (Journal Geophysical Research, 107(D10), 10.1029/2001JD000489, 2002), caption for Figure 3 was printed incorrectly. with corrected follows.