Data-based modelling of the Earth's dynamic magnetosphere: a review

This paper reviews the main advances in the area of data-based modelling of the Earth's distant magnetic field achieved during the last two decades. The essence and the principal goal of the approach is to extract maximum information from available data, using physically realistic and flexible mathematical structures, parameterized by the most relevant and routinely accessible observables. Accordingly, the paper concentrates on three aspects of the modelling: (i) mathematical methods to develop a computational "skeleton" of a model, (ii) spacecraft databases, and (iii) parameterization of the magnetospheric models by the solar wind drivers and/or ground-based indices. The review is followed by a discussion of the main issues concerning further progress in the area, in particular, methods to assess the models' performance and the accuracy of the field line mapping. The material presented in the paper is organized along the lines of the author Julius-Bartels' Medal Lecture during the General Assembly 2013 of the European Geosciences Union

Interhemispheric magnetic conjugacy

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/97539/1/jgra50137.pd

A study of omega bands and Ps6 pulsations on the ground, at low altitude and at geostationary orbit

We investigate the electrodynamic coupling between auroral omega bands and the inner magnetosphere. The goal of this study is to determine the features to which omega bands map in the magnetosphere. To establish the auroral-magnetosphere connection, we appeal to the case study analysis of the data rich event of September 26, 1989. At 6 magnetic local time (MLT), two trains of Ps6 pulsations (ground magnetic signatures of omega bands) were observed to drift over the Canadian Auroral Network For the OPEN Program Unified Study (CANOPUS) chain. At the same time periodic ionospheric flow patterns moved through the collocated Bistatic Auroral Radar System (BARS) field of view. Similar coincident magnetic variations were observed by GOES 6, GOES 7 and SCATHA, all of which had magnetic foot points near the CANOPUS/BARS stations. SCATHA, which was located at 6 MLT, 0.5 RE earthward of GOES 7 observed the 10 min period pulsations, whereas GOES 7 did not. In addition, DMSP F6 and F8 were over-flying the region and observed characteristic precipitation and flow signatures. From this fortunate constellation of ground and space observations, we conclude that auroral omega bands are the electrodynamic signature of a corrugated current sheet (or some similar spatially localized magnetic structure) in the near-Earth geostationary magnetosphere

German Prison-of-War Camp No 38 (the town of Reni, 1944 – 1945)

On the basis of the archival documents the personal composition of the reception and transit front-line prisoner- of war-camp No. 38, which was established in 1944 in the vicinity of the town of Reni (Odessa region), is analyzed. The camp existed until the autumn of 1945. Most of the prisoners of war died of typhus in it. The main analysis falls on the group of German prisoners of war of this camp (age characteristics, military ranks

Germans and Jews of Bessarabia: two fates, two tragedies

The article analyzes issues related to the resettlement and co-existence of two peoples – Germans and Jews within the territory of Bessarabia. Despite significant differences in the historical past of these peoples, they are united by many different factors, among which are both successes and tragedies

SOMATO-PSYCHIC DISORDER CLINICAL CASE IN A FEMALE PATIENT WITH MULTINODULAR EUTHYROID GOITER

oai:ojs.localhost:article/13The article presents a clinical case of somato-psychic disorder in a patient with multinodular euthyroid goiter. The patient was diagnosed with thyroid cancer on outpatient basis and was suggested urgent surgical treatment. After receiving information about cancer pathology the patient developed symptoms of hypernosognostic neurotic syndrome with manifestations of obsessions and hystero-hypohondriasis. The patient was focused on the rigid hypochondria with detailed statement of the slightest signs of bodily distress. Therefore, the above example demonstrates difficulty in selecting the tactics of management for such patients due to development of symptoms primarily determined by psycho-emotional tension. This category of patients should be followed not only by endocrinologists, surgeons, but the multidisciplinary team, including psychiatrists, and psychotherapists, since in case of combined impact of a number of adverse factors, the reaction to the disease can become so extreme that its management in the early stages of therapy seems no less important than the direct treatment of somatic condition

Radial distribution of the inner magnetosphere plasma pressure using low-altitude satellite data during geomagnetic storm: the March 1-8, 1982 Event

Plasma pressure distribution in the inner magnetosphere is one of the key parameters for understanding the main magnetospheric processes including geomagnetic storms and substorms. However, the pressure profiles obtained from in-situ particle measurements by the high-altitude satellites do not allow tracking the pressure variations related to the storms and substorms, because a time interval needed to do this generally exceeds the characteristic times of them. On contrary, fast movement of low-altitude satellites makes it possible to retrieve quasi-instantaneous profiles of plasma pressure along the satellite trajectory, using the fluxes of precipitating particles. For this study, we used the Aureol-3 satellite data for plasma pressure estimation, and the IGRF, Tsyganenko 2001 and Tsyganenko 2004 storm time geomagnetic field models for the pressure mapping into the equatorial plane. It was found that during quiet geomagnetic condition the radial pressure profiles obtained coincide with the profiles, obtained previously from the high-altitude measurements. On the contrary, it was found that during geomagnetic storm the plasma pressure profiles became sharper; the position of the maximum of plasma pressure corresponds to expected one for given Dst minimum; the maximum value of inner magnetosphere static pressure correlates with the solar wind dynamic pressure. Increase in the plasma pressure profiles indicates the possibility to consider the interchange instability as one of important factors for the development of the main phase of geomagnetic storm.Comment: Accepted in Advances in Space Researc

A quantitative assessment of empirical magnetic field models at geosynchronous orbit during magnetic storms

[1] We evaluate the performance of recent empirical magnetic field models (Tsyganenko, 1996, 2002a, 2002b; Tsyganenko and Sitnov, 2005, hereafter referred to as T96, T02 and TS05, respectively) during magnetic storm times including both pre- and post-storm intervals. The model outputs are compared with GOES observations of the magnetic field at geosynchronous orbit. In the case of a major magnetic storm, the T96 and T02 models predict anomalously strong negative Bz at geostationary orbit on the nightside due to input values exceeding the model limits, whereas a comprehensive magnetic field data survey using GOES does not support that prediction. On the basis of additional comparisons using 52 storm events, we discuss the strengths and limitations of each model. Furthermore, we quantify the performance of individual models at predicting geostationary magnetic fields as a function of local time, Dst, and storm phase. Compared to the earlier models (T96 and T02), the most recent storm-time model (TS05) has the best overall performance across the entire range of local times, storm levels, and storm phases at geostationary orbit. The field residuals between TS05 and GOES are small (≤3 nT) compared to the intrinsic short time-scale magnetic variability of the geostationary environment even during non-storm conditions (∼24 nT). Finally, we demonstrate how field model errors may affect radiation belt studies when estimating electron phase space density

Memory of the Past in the Multi-Ethnic Space of Danube Cities

The article presents the issues of preserving the historical memory of the cities of Southern Bessarabia (the southwestern part of Odesa region, Ukraine). The specific features of the region’s historical development, frequent changes in the state affiliation, intermixture and diversity of confessional and ethnographic aspects contributed to the formation of a special, multicultural and polyethnic habitat for the residents of this region. The region’s cities, formed many centuries ago, demonstrate specific, often unique features of the memory of the past, embodied in the temples, street names, residential buildings, and administrative and fortification structures. The preservation of the urban memory and its popularisation serve as the foundation of human beings who are free from prejudice, protect their identity and are tolerant of their neighbours