A5047845829- Atmospheric and Environmental Gas Dynamics
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Cryospheric studies and observations
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Peatlands and Wetlands Ecology
- Arctic and Antarctic ice dynamics
- Hydrocarbon exploration and reservoir analysis
- Atmospheric aerosols and clouds
- Plant Water Relations and Carbon Dynamics
- Geological Studies and Exploration
- Fire effects on ecosystems
- Climate variability and models
- Hydrology and Watershed Management Studies
Voeikov Main Geophysical Observatory
2015-2024
Abstract. Four years of continuous aerosol number size distribution measurements from the Arctic Climate Observatory in Tiksi, Russia, are analyzed. Tiksi is located a region where situ information on particle properties has not been previously available. Particle distributions were measured with differential mobility sizer (in diameter range 7–500 nm) and an aerodynamic 0.5–10 μm). Source effects modal features number, mass concentrations presented for different seasons. The monthly median...
Abstract International Arctic Systems for Observing the Atmosphere (IASOA) activities and partnerships were initiated as a part of 2007–09 Polar Year (IPY) are expected to continue many decades legacy program. The IASOA focus is on coordinating intensive measurements atmosphere collected in United States, Canada, Russia, Norway, Finland, Greenland create synthesis science that leads an understanding why not just how evolving. premise there limitations with modeling satellite observations can...
Abstract. Subsea permafrost and hydrates in the East Siberian Arctic Shelf (ESAS) constitute a substantial carbon pool, potentially large source of methane to atmosphere. Previous studies based on interpolated oceanographic campaigns estimated atmospheric emissions from this area at 8–17 TgCH4 yr−1. Here, we propose insights observations evaluate these estimates. The comparison high-resolution simulations mole fractions continuous during whole year 2012 confirms high variability...
Abstract. Global climate change is one of the most important scientific, societal and economic contemporary challenges. Fundamental understanding major processes driving key problem which to be solved not only on a global but also regional scale. The accuracy modelling depends number factors. One these factors adequate comprehensive information anthropogenic impact highest in industrial regions areas with dense population – modern megacities. Megacities are “heat islands”, significant...
Abstract. The non-uniform spatial integration, an inherent feature of the eddy covariance (EC) method, creates a challenge for flux data interpretation in heterogeneous environment, where contribution different land cover types varies with flow conditions, potentially resulting biased estimates comparison to areally averaged fluxes and attributes. We modelled footprints characterized scale our EC measurements Tiksi, tundra site northern Siberia. used leaf area index (LAI) class (LCC) data,...
For the first time, data on emission of climate-active gases from soils different types use south taiga sub-zone were obtained. Soils boreal belt are key elements global carbon cycle. They determine sink and gases. near large cities a major sink, in face climate change, sinks can become source contribute significantly to change planet. Studies FCO2 FCH4 fluxes carried out territory monitoring site “Ladoga” located southern subzone land not used agriculture, former agriculture lands,...
Abstract. Arctic tundra is facing unprecedented warming, resulting in shifts the vegetation, thaw regimes, and potentially ecosystem–atmosphere exchange of carbon (C). However, estimates regional dioxide (CO2) methane (CH4) budgets are highly uncertain. We measured CO2 CH4 fluxes, vegetation composition leaf area index (LAI), depth, soil wetness Tiksi (71∘ N, 128∘ E), a heterogeneous site located within prostrate dwarf-shrub zone northeastern Siberia. Using closed chamber method, we...
Climate change is one of the most important global problems 21st century. The territory Russia located in an area significant observed and forecasted climate change. Achieving Russia's carbon neutrality by 2060 requires development a national system for monitoring greenhouse gas emissions uptake. To achieve this goal, Ministry Science Higher Education launched pilot programme to create network polygons. St Petersburg State University together with Voeikov Main Geophysical Observatory created...
Abstract. The non-uniform spatial integration inherent in the eddy covariance (EC) method provides an additional challenge for data interpretation when fluxes are measured a heterogeneous environment, as contribution of different surface types varies with flow conditions, potentially resulting bias compared to true areally averaged and attributes. We modelled flux footprints characterized scale our EC measurements at Tiksi, tundra site northern Siberia, including comparison source area...
Abstract. Global climate change is one of the most important scientific, societal and economic contemporary challenges. Fundamental understanding major processes driving key problem which to be solved not only on a global but also regional scales. The accuracy modelling depends number factors. One these factors adequate comprehensive information anthropogenic impact highest in industrial regions areas with dense population – modern megacities. Megacities are heat islands, significant sources...
Abstract. Sub-sea permafrost and hydrates in the East Siberian Arctic Ocean Continental Shelf (ESAS) constitute a substantial carbon pool, potentially large source of methane to atmosphere. Previous studies based on interpolated oceanographic campaigns estimated atmospheric emissions from this area at 8–17 Tg CH4 y−1. Here, we propose insights observations evaluate these estimates. Isotopic suggest biogenic origin (either terrestrial or marine) air masses originating ESAS during summer 2010....
To determine the methane emission intensities (EIs) in St. Petersburg and its suburbs measurements of (CH4) mole fraction total column were used, analysis which was carried out using mass balance method. For suburban territory value EIs estimated from events nocturnal accumulation detected continuous CH4 at atmospheric monitoring station Saint State University (SPbU) located Peterhof. It obtained that EI values for 2014-2015 (44±27) t/(km<sup>2</sup> ∙year). The determination...
Abstract. Four years of continuous aerosol number size distribution measurements from an Arctic Climate Observatory in Tiksi Russia are analyzed. Source region effects on particle modal features, and mass concentrations presented for different seasons. The monthly median total concentration ranges 184 cm-3 November to 724 July with a local maximum March 481 cm-3. has distinct February–March 1.72–2.38 μg m-3 two minimums June 0.42 September–October 0.36–0.57 m-3. These seasonal cycles related...
A new process-based model designed to develop a methodology for the inventory of green- house gas emissions from peatbog soils is presented. Within framework general model, parameterized formula calculating methane oxidation in aerated soil layer and vegetation proposed. The proposed approach defined as model-empirical, since theoretical relies on use values parameters determined by specially developed experimental procedure. detailed description calibration means studies samples given....
Large stores of carbon frozen in the Arctic as permafrost are under threat thawing temperatures increase at a rate four times that global mean. This study uses recent atmospheric data from North Slope Alaska and Northeast Siberia to provide most up-to-date assessment emissions trends these two major high-latitude regions.We use methods quantify assess across different seasons: 1) Using 35 years Barrow, Alaska, wind sector method quantifies by calculating concentration enhancements over...