A5085035303- Climate change and permafrost
- Cryospheric studies and observations
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Indigenous Studies and Ecology
- Landslides and related hazards
- Tree-ring climate responses
- Fire effects on ecosystems
- Polar Research and Ecology
- Peatlands and Wetlands Ecology
- Hydrocarbon exploration and reservoir analysis
- Arctic and Russian Policy Studies
- Planetary Science and Exploration
- Smart Materials for Construction
- Plant Water Relations and Carbon Dynamics
- Winter Sports Injuries and Performance
- Astro and Planetary Science
- Soil and Unsaturated Flow
- Microbial Community Ecology and Physiology
- Atmospheric and Environmental Gas Dynamics
- Indoor and Outdoor Localization Technologies
- Advanced Data Processing Techniques
- Engineering Diagnostics and Reliability
Melnikov Permafrost Institute of the Siberian Branch of the Russian Academy of Science
2016-2025
Russian Academy of Sciences
2011-2025
Siberian Branch of the Russian Academy of Sciences
2013-2025
Institute of Geography
2024
North-Eastern Federal University
2013-2022
Institute of the Earth’s Crust
2011-2022
Seoul National University
2019
Zarubezhneft
2019
Petrozavodsk State University
2013-2015
Ice-rich permafrost in the circum-Arctic and sub-Arctic (hereafter pan-Arctic), such as late Pleistocene Yedoma, are especially prone to degradation due climate change or human activity. When Yedoma deposits thaw, large amounts of frozen organic matter biogeochemically relevant elements return into current biogeochemical cycles. This mobilization has local global implications: increased thaw thermokarst thermal erosion settings enhances greenhouse gas fluxes from regions. In addition, this...
Abstract Marked increases in active‐layer and upper permafrost temperatures occurred the central Lena River basin association with abrupt soil moisture following summer of 2005. The positive trend temperature‐moisture relations was observed at monitoring sites Yakutsk area, regardless vegetation type. increase temperature appears to have started response large amounts snow that accumulated winter 2004. Abnormally high pre‐winter rainfall snowfall three years accelerated warming through...
Lakes are a ubiquitous landscape feature in northern permafrost regions. They have strong impact on carbon, energy and water fluxes can be quite responsive to climate change. The monitoring of lake change high latitudes, at sufficiently accurate spatial temporal resolution, is crucial for understanding the underlying processes driving To date, studies regions were based variety different sources, image acquisition periods single snapshots, localized analysis, which hinders comparison Here,...
ABSTRACT Permafrost degradation and changes in water balance a thermokarst lake the middle part of Lena River basin eastern Siberia were investigated. We analysed role permafrost thawing growing lake. Long‐term observations during last two decades (1992–2008) at our monitoring site, Yukechi, showed significant modifications landforms. Observations included ground temperature, depth, soil moisture content active layer, surface subsidence rate, ecological surrounding environment. also used...
One quarter of the Northern hemisphere is underlain by permanently frozen ground, referred to as permafrost. Due climate warming, irreversibly thawing permafrost releasing organic matter for up a million years, most which decomposes into carbon dioxide and methane, further enhancing greenhouse effect. Part this also consists revived cellular microbes (prokaryotes, unicellular eukaryotes) well viruses that have remained dormant since prehistorical times. While literature abounds on...
Abstract Soil moisture and its isotopic composition were observed at Spasskaya Pad experimental forest near Yakutsk, Russia, during summer in 1998, 1999, 2000. The amount of soil water (plus ice) was estimated from volumetric content obtained with time domain reflectometry. δ 18 O showed large interannual variation depending on the rainfall. decreased a dry (1998), indicating that ice meltwater deeper layer transported upward. On other hand, wet (1999), increased due to percolation rain high...
This study assessed trends in the variability of soil temperature (TSOIL) using spatially averaged observation records from Russian meteorological land stations. The contributions surface air (SAT) and snow depth (SND) to TSOIL variation were quantitatively evaluated. Composite time series these data revealed positive during period 1921–2011, with accelerated increases since 1970s. warming rate over entire was faster than SAT both permafrost non-permafrost regions, suggesting that SND...
ABSTRACT Continuous observation over the last decade has revealed evidence of abrupt land surface moistening as well rapid soil warming within active layer and upper part permafrost central Lena River basin in eastern Siberia. The present study examined relationship between degradation ecohydrological change this region. Increases depth recorded since winter 2004 resulting from increases moisture saturation have resulted thawing causing thermokarst subsidence, which negatively impacted...
The history of permafrost landscape map compilation is related to the study ecological problems with permafrost. Permafrost-landscape studies are now widely used in geocryological mapping. classifications and mapping necessary for studying trends development natural environment northern high-altitude regions. cryogenic factor zone plays a leading role differentiation landscapes, so it must be considered during classification construction. In this study, map’s special content was developed...
Abstract In the ice‐rich permafrost area of Central Yakutia (Eastern Siberia, Russia), climate warming and other natural anthropogenic disturbances have caused degradation soil subsidence, resulting in formation numerous thermokarst (thaw) lakes. These lakes are hotspots greenhouse gas emissions, but with substantial spatial temporal heterogeneity across Arctic. We measured dissolved CO 2 CH 4 concentrations their seasonal patterns over a yearly cycle. Lakes formed Holocene (alas lakes)...
‘Alases’ are mature thermokarst depressions covered by grassland distributed in taiga forests central Yakutia, eastern Siberia, following formation initiated early Holocene. Alases important land‐cover class the Yakutia lowland occupying 17% of total land area. CH 4 and N 2 O fluxes were measured temporally a typical alas which have pond at center during growing season two years. Seven monitoring plots represented various vegetation types: larch forest (F), dry (DG), four wet grasslands (WG)...
Abstract. This study not only examined the spatiotemporal variations of active-layer thickness (ALT) in permafrost regions during 1948–2006 over terrestrial Arctic experiencing climate changes, but also identified associated drivers based on observational data and a simulation conducted by land surface model (CHANGE). The focus ALT extends previous studies that have emphasized ground temperatures regions. Ob, Yenisey, Lena, Yukon, Mackenzie watersheds are foci study. Time series Eurasian...
This paper describes a newly developed technology for the calculation of trajectories mobile objects, which is based on commercially available sensors being integrated into modern phones and other gadgets. First, step counting technique was implemented. Second, novel length estimator proposed. These two algorithms utilize data from accelerometer sensor only. Third, heading information obtained using gyroscope with complementary filter in quaternion form. The combined algorithm implemented...
Abstract The Central Yakutian permafrost landscape is rapidly being modified by land use and global warming, but small‐scale thermokarst process variability hydrological conditions are poorly understood. We analyze lake‐area changes thaw subsidence of young lakes on ice‐complex deposits (yedoma lakes) in comparison to residual alas basins during the last 70 years for a local study site we record regional lake size distribution different ice‐rich terraces using satellite historical airborne...
Fluvial thermal erosion following ice breakups of the Lena River (Yakutia, Siberia) is a significant geomorphic process. During initial stage breakup, pushes up onto river banks and produces large accumulations sediments that protect islands' heads against mechanical effects river's flow. This relatively short terminates only few days after breakup begins. In second phase flooding, has melted, island become free ice. Hence, when water levels are high, floodwaters in sustained contact with...
Recent increases in global temperature have stimulated permafrost degradation associated with landform deformation caused by the melting of excess ground ice (thermokarst). Central Yakutia is underlain ice-rich continuous permafrost, and there are complicated permafrost-related features forested deforested areas. This situation makes thermokarst monitoring necessary over a wide area to achieve better understanding its dynamics. As case study, we applied L-band InSAR analysis map surface...