The analysis of aridity in Central Serbia from 1949 to 2015     

Milica?G.?Radakovi?  Ivana?To?i?Email author  Nikola?Ba?evi?  Dragan?Mladjan  Milivoj?B.?Gavrilov  Slobodan?B.?Markovi? 《Theoretical and Applied Climatology》2018,133(3-4):887-898

In this study, we apply De Martonne and Pinna combinative indices to analyze the aridity in Central Serbia. Our dataset consists of mean monthly surface air temperature (MMT) and mean monthly precipitation (MMP) for 26 meteorological stations during the period 1949–2015. MMT and MMP are used for calculating monthly, seasonal, and annual aridity indices for period of 66 years. According to the De Martonne climate classification, we determine five, three, and four types of climate on the monthly, seasonal, and annual basis, respectively. During the observed period, winter was extremely humid, spring and autumn were humid, and summer was semi-humid. Humid and semi-humid climate with Mediterranean vegetation are identified by the annual Pinna combinative index. We find that there is no change in aridity trend in Central Serbia for the period 1949–2015. Aridity indices are additionally compared with the North Atlantic Oscillation and El-Niño South Oscillation in order to establish a possible connection with the large-scale processes. Results are further compared with several earlier studies of aridity in Serbia. With this study, the analysis of aridity in whole Serbia has become complete.  相似文献   

Seasonal prevailing surface winds in Northern Serbia     

Tošić  Ivana  Gavrilov  Milivoj B.  Marković  Slobodan B.  Ruman  Albert  Putniković  Suzana 《Theoretical and Applied Climatology》2018,131(3-4):1273-1284

Theoretical and Applied Climatology - Seasonal prevailing surface winds are analyzed in the territory of Northern Serbia, using observational data from 12 meteorological stations over several...  相似文献   

Physical Effects Arising from the Motion of Plasma Flows in the Ionosphere     

Gavrilov  B. G.  Poklad  Yu. V. 《Izvestiya Physics of the Solid Earth》2021,57(5):731-744

Izvestiya, Physics of the Solid Earth - Abstract—The occurrence and evolution of plasma fluxes in the ionosphere is one of the factors that have a significant impact on the dynamics and state...  相似文献   

The late Cenomanian paleoecological event (OAE 2) in the eastern Caucasus basin of Northern Peri-Tethys     

Yu. O. Gavrilov  E. A. Shcherbinina  O. V. Golovanova  B. G. Pokrovskii 《Lithology and Mineral Resources》2013,48(6):457-488

The Cretaceous sections of the eastern Caucasus contain rich in organic matter (OM) sediments corresponding to the late Cenomanian Oceanic Anoxic Event 2. They are marked by positive δ¹³C and negative δ¹⁸O isotopic anomalies, which are characteristic for this level in many areas of the world. The sediments exhibit distinct cyclic patterns reflected in an alternation of black OM-rich and gray more calcareous layers. The rocks are enriched with many chemical elements, although concentrations of some of them (Mo, Se) are lower than in typical sediments of anoxic basins. It is inferred that anoxic environments in the paleobasin were unstable and locally developed. Nannofossil assemblages from OAE 2 sediments are dominated by the highly resistant eurytropic taxon Watznaueria accompanied by common cool-water Eprolithus and rare warm-water Rhagodiscus representatives, which implies the development of environments unfavorable for the normal marine nannoflora and short-term cooling in the basin during OAE 2. The OM-rich sediments were deposited against the background of the rapid eustatic transgression due to a significant increase in productivity of phytoplankton in the paleobasin. The OAE 2 duration is estimated to be approximately 400 ka.  相似文献   

The mineralogical,isotope (K–Ar), structural,and textural features of the Jurassic siliciclastic complex in various tectonic environments (Greater Caucasus,Chechnya, and Georgia)     

Yu. O. Gavrilov  Yu. V. Kushcheva  I. V. Latysheva  A. I. Gushchin  A. L. Sokolova 《Moscow University Geology Bulletin》2016,71(2):137-150

The variations in the structural, textural, mineralogical, and geochemical (isotope) features of Lower to Middle Jurassic siliciclastic sediments along the Chanty-Argun River in Mountainous Chechnya and Georgia are discussed. This profile transects areas with various types of deformed sediments, from the northern comparatively weakly deformed and altered zone, to the southern zone of intense deformation and cleavage. Southward along the profile, these alterations are accompanied by the evolution of clay mineral assemblages, as well as polytypic modifications of micas and their crystallinity index. Increasing intensity of rock alteration and cleavage leads to a change of the K–Ar system, which results in a substantially rejuvenated isotope age of the sediments with a simultaneous increase of their stratigraphic age.  相似文献   

Statistical Correction of Mesoscale Variances of the Upper Atmospheric Temperature Based on Observations of the Night Hydroxyl Emission in Zvenigorod     

Popov  A. A.  Gavrilov  N. M.  Perminov  V. I.  Pertsev  N. N. 《Geomagnetism and Aeronomy》2022,61(1):S127-S133

Geomagnetism and Aeronomy - Temporally coherent mesoscale perturbations of the rotational temperature of excited hydroxyl (OH*) are often used as an indicator of wave processes in the mesosphere...  相似文献   

Love numbers of the giant planets     

S.V. Gavrilov  V.N. Zharkov 《Icarus》1977,32(4):443-449

We calculate the Love numbers k_n for n = 2 to 10, and determine the “gravitational noise” from tides. The new values k₂ for Jupiter, Saturn, and Uranus yield new estimates for the planetary dissipation functions: $\text{Q}{}_{\mathrm{<mtext>J</mtext>}}\text{? 2.5 × 10}{}^4$, $\text{Q}{}_{\mathrm{<mtext>S</mtext>}}\text{? 1.4 × 10}{}^4\text{, Q}{}_{\mathrm{<mtext>U</mtext>}}\text{? 5 × 10}{}^3$.  相似文献   

Geophysical effects of the March 29, 2006, solar eclipse     

V. V. Adushkin  B. G. Gavrilov  K. I. Gorelyi  Yu. S. Rybnov  V. A. Kharlamov 《Doklady Earth Sciences》2007,417(2):1393-1397

  相似文献   

Comparison of dynamical and geometrical shape of the moon     

I.V. Gavrilov  G.T. Yanovitskaya 《Physics of the Earth and Planetary Interiors》1974,8(1):102-104

The dynamical shape of the moon is described by means of the parameters of its gravity field and principal moments of inertia. These data are derived from the lunar artificial satellites (“Luna-10”, “Orbiters 1–4”), and astronomical measurements of the physical librations.The geometrical shape of the moon is determined from measurements of absolute heights of the lunar surface.The differences of dynamical and geometrical figures of the moon are analysed, and their possible interpretation is discussed.  相似文献   

On stochastic near-critical oscillations in the upper mantle     

S. V. Gavrilov  A. N. Boiko 《Izvestiya Physics of the Solid Earth》2008,44(1):38-42

The problem of the determination of thermomechanical conditions in the upper mantle under a moving lithospheric plate at a given shear stress does not have a unique solution. Given a fixed heat flux from the lower mantle, two types of motion are possible in the mantle: subcritical (slower and colder) and supercritical (faster and hotter). In this work, it is shown that, if these modes are rather close to each other (in the near-critical state of the mantle), transitions from one mode to another and backward are possible. The calculated period of a change in the mantle state amounts to ～0.3 Myr for the Pacific plate. The oscillatory regime of the mantle state can manifest itself in the activity pulsations of hotspots located near fast separating mid-ocean ridges.  相似文献