On Transformation of Energy of Geomagnetic Disturbances

Izvestiya, Physics of the Solid Earth - Abstract—A mechanism responsible for the transformation of energy of geomagnetic disturbances into the energy of chemically active products is...     

Soil acidity adaptive control problem

Problem of soil acidity regularization is modeled as stochastic adaptive control problem with a linear difference equation of the dynamics of a field pH level. Stochastic component in the equation represents an individual time variability of soil acidity of an elementary section. We use Bayesian approach to determine a posteriori probability density function of the unknown parameters of the stochastic transition process. The Kullback–Leibler information divergence is used as a measure of difference between true distribution and its estimation. Algorithm for the construction of an adaptive stabilizing control in such a linear control system is proposed in the paper. Numerical realization of the algorithm is represented for a problem of a field soil acidity control.     

Human footprints on greenhouse gas fluxes in cryogenic ecosystems

Various human footprints on the flux of biogenic greenhouse gases from permafrost-affected soils in Arctic and boreal domains in Russia are considered. Tendencies of significant growth or suppression of soil CO₂ fluxes change across types of human impact. Overall, the human impacts increase the mean value and variance of local soil CO₂ flux. Human footprint on methane exchange between soil and atmosphere is mediated by drainage. However, all the types of human impact suppress the sources and increase sinks of methane to the land ecosystems. N₂O flux grew under the considered types of human impact. Based on the results, we suggest that human footprint on soil greenhouse gases fluxes is comparable to the effect of climate change at an annual to decadal timescales.     

Russian Mountain Glaciers in a “Thawing” World: The First Estimates of the Balance of Greenhouse Gases in the Caucasus and Altai

Doklady Earth Sciences - In the modern sense, glaciers are a unique large terrestrial biome. They combine autotrophic–heterotrophic ecosystems with the most significant contribution of...     

The role of winter flaw polynyas in the formation of ice and hydrologic conditions in the Siberian shelf seas in the summer period

This paper analyzes the influence of flaw polynyas of the seas of the Siberian shelf on the formation of ice conditions in summer based on the ten-day data on the areas of flaw polynyas for 1978–2002 obtained by satellite image processing. The results of forecasts of summer ice conditions in the seas of the Siberian shelf are presented. The correspondence between the forecasts and observed data is 94.7% on average. The interrelation of atmospheric and ice processes is shown for the case when winter atmospheric processes determine ice conditions for the following summer and fall.     

Indicators in Estimation of Land Degradation Neutrality for Russian Boreal Forests

Doklady Earth Sciences - In this paper, we analyze the applicability of the land degradation neutrality (LDN) concept of the UN Convention to Combat Desertification to the Russian boreal forests....     

The Long-Term Effect of Ongoing Spruce Decay on Carbon Exchange in Taiga Forests

Doklady Earth Sciences - The long-term effect of spruce stand decay on the CO2 balance was studied in the taiga of Valdai (Russia, Novgorod oblast). The CO2 emission from soil, the respiration of...     

Circumbinary Planetary Systems in the Solar Neighborhood: Stability and Habitability

Astronomy Letters - The radii of the inner and outer boundaries of the circumbinary habitable zone (CBHZ) and the radii of the circumbinary chaotic zone (CBCZ) have been calculated for close binary...     

Latitudinal Patterns of the Early Stages of Woody Debris Decay in the Forest Zone of West Siberia

Doklady Earth Sciences - A large data set (sample size >4000) of the decomposition rates of coarse woody debris was collected in field mass loss experiments along the macro-regional profile...