On the polar vortex streamer dynamics
Potential vorticity (PV) streamers and cutoffs are indicators to the Rossby wave breaking (RWB) near the extratropical tropopause. In the Rossby waves breaking, the formation of elongated high-PV stratospheric air tongues extending to the equator and tropospheric low PV air tongues extending to the pole are obtained. There are two...
borovko_3.pdf331.53 KB
Study of the in fluence of Atlantic water on the ice cover state in the Eurasian basin of the Arctic Ocean using numerical simulation
A numerical simulation of the water and sea ice dynamics of the Arctic Ocean was carried out to identify the physical mechanisms that determine the variability of the state of the ice cover. For the research, we used the coupled ocean-ice regional numerical model of the North Atlantic and the...
iakshina_0.pdf985.64 KB
Simulation of the near-bottom water warming in the Laptev Sea in 2007-2008
The Laptev Sea, one of the most severe Arctic shelf seas is the focus of the international research on account of a pronounced climate change (warming of the atmosphere temperature, lengthening of the summer open-water season, reduction of the ice extent, rapid coastal erosion). In recent years, as compared to...
kraineva_0.pdf683.79 KB
The Novosibirsk reservoir hydrothermal regime model
In this paper, the adaptation of the SibCIOM three-dimensional thermodynamic model is considered that allows modeling a three-dimensional velocity and temperature distribution, as well as a two-dimensional field of the ice cover for the Novosibirsk reservoir with seasonal changes in the water level. An analysis of the numerical results shows...
kravtchenko.pdf1.67 MB
Reproduction of runoff hydrograph in the Lena River basin with a hydrologically correct digital elevation model
A hydrologically correct digital model of the bottom topography of the Lena River basin with a resolution of (1/3)° x (1/3)° is constructed. Based on the linear model of forming a water balance in the river-bed network and a model network of river channels schematized in the form of a...
krylova_2.pdf671.92 KB
Numerical comparison of the source identification problem with the continuation problem for the air quality evaluation scenario
In the data assimilation algorithms for the air quality applications, the source identification problem can be considered as an auxiliary one for the solution of the model state function continuation problem. The algorithm based on the ensembles of the adjoint problem solutions is applied to solve the inverse problems. The...
penenko_5.pdf1.63 MB
The use of satellite information to estimate smoke emissions parameters of power stations
The satellite observations of smoke plumes from the pipes of power stations make possible to obtain prompt information about the processes of impurities distribution in the atmosphere and about the source parameters. This paper proposes a method of numerical reconstruction of characteristics of the active stage of the smoke stream...
raputa_8.pdf1.25 MB