The generation of intensive short-period internal waves in the frontal zone of a coastal upwelling     

V. I. Vlasenko  V. A. Ivanov  I. G. Krasin  A. D. Lisichenok 《Physical Oceanography》1998,9(3):155-168

The measurements data provided by an antenna of distributed temperature sensors, mounted on an oceanographic tower in the South Crimea continental shelf area, were applied to study the mechanism for the generation of short-period internal waves with anomalous amplitudes in the Black Sea. For analysis, information was incorporated concerning the background hydrological and meteorological conditions that were observed during the experiment. A mathematical model for the phenomenon under study has been constructed, and calculations of the anomalous internal wave generation have been presented. The paper contains a comparative analysis of thein situ data and simulation results, and demonstrates a good qualitative/quantitative agreement between the parameters of internal waves. Translated by Vladimir A. Puchkin.  相似文献   

Thermohaline structure and dynamics of waters in the Izmir Bay     

V. A. Ivanov  A. I. Kubryakov  N. B. Shapiro 《Physical Oceanography》1998,9(4):273-296

The paper describes the thermohaline structure of the Izmir waters obtained from three CTD-surveys carried out in different seasons of 1994. Also, the mechanisms responsible for the formation of the regional peculiarities and the variability of the temperature/salinity field and examined. The results of diagnosis and adaptation computations of the three-dimensional water circulation are analysed, applying a numerical model and CTD-data. Translated by Vladimir A. Puchkin.  相似文献   

Online Publication of Tiltmeter Data Based on the SeedLink Protocol     

I.?M.?Aleshin  S.?D.?Ivanov  V.?N.?Koryagin  Y.?O.?Kuzmin  F.?V.?PerederinEmail author  I.?A.?Shirokov  E.?A.?Fattakhov 《Seismic Instruments》2018,54(3):254-259

The main goal of this work is to provide real-time access to the data of the NSH tunnel tiltmeters via the Internet. Software is developed that solves this problem and also provides real-time visualization and archiving of data. The solution is based the specialized real-time protocol SeedLink, which ensures lossless data delivery with minimal transmission overhead. In order to simplify access to the device via IPv4 and to protect data from unauthorized access, a secure channel based on virtual private networks has been used. The solution was tested on two tiltmeters installed in the building of the Institute of Physics of the Earth, Russian Academy of Sciences (IPE RAS). Further device testing with an unstable power supply and communication conditions is planned. Therefore, the developed software was ported to energy-efficient ARM computers. Data transmission tests were carried out in the local IPE RAS network and in the wireless network of a mobile network operator. Real-time visualization of data from both tiltmeters and access to the archive are provided in addition to real-time access to data on the IPE RAS website.  相似文献   

Event-scale pebble mobility observed by RFID tracking in a pre-Alpine stream: a field laboratory     

Vladislav Ivanov  Alessio Radice  Monica Papini  Laura Longoni 《地球表面变化过程与地形》2020,45(3):535-547

Understanding coarse sediment transport is crucial for the prediction of sediment migration and the consequent development of fluvial morphologies. In this study, cobble displacements in a pre-Alpine creek have been recorded by means of radio frequency identification (RFID). Pebble monitoring has been systematically performed after each rainfall event with moderate precipitation, in order to exclude the superimposition of sediment displacements induced by triggering factors acting at different times. The analysis of the collected data was carried out through the application of both a principal component analysis and the Buckingham Π theorem. The experimental trends were interpreted considering the ratio of mobile pebbles, the pebbles' displacement and virtual velocity as the dependent variables. These quantities mostly depend on the event peak discharge, with a nonlinear increase of the travelled distance and a growth of up to two orders of magnitude of the virtual velocity (for an approximately 10× increase in peak discharge). An inverse dependency of the virtual velocity on the event duration was also observed. A comparison of the results obtained with those from laboratory investigations of bedload transport mechanics evidenced the differences in parametric trends associated with sediment mobility in the two environments. This contrast brings forward the combination of multiple drivers of sediment mobility, such as local morphology, sediment dimensions and flow unsteadiness, warranting a further in-depth investigation. Representation of results in a dimensionless form is suggested as a good practice to analyse data from case studies characterized by different scales. © 2019 John Wiley & Sons, Ltd.  相似文献   

Transverse (Sublatitudinal) Zonality of the Urals: Causes and Time of Occurrence     

Ivanov  K. S.  Puchkov  V. N. 《Doklady Earth Sciences》2022,504(2):344-348

Doklady Earth Sciences - It is shown that the observed latitudinal zonality of the Ural Fold Belt is determined mainly by the different levels of erosion of different areas. Thus, the deep levels...  相似文献