Scientific investigations by the Polar Geophysical Institute on the Spitsbergen archipelago

2010 ◽  
Vol 50 (5) ◽  
pp. 554-567
Author(s):  
E. D. Tereshchenko
Keyword(s):  
Geophysical Institute ◽  
Polar Geophysical Institute ◽  
Scientific Investigations

scholarly journals Results of microwave monitoring of middle atmosphereozone in polar latitudes for two winter seasons 2017-2018 and 2018-2019.

2020 ◽  
Author(s):  
Y.Y. Kulikov ◽  
◽  
A.F. Andriyanov ◽  
V.G. Ryskin ◽  
V.M. Demkin ◽  
...  
Keyword(s):  
Middle Atmosphere ◽  
Continuous Series ◽  
Vertical Profiles ◽  
Stratospheric Warming ◽  
Geophysical Institute ◽  
Sudden Stratospheric Warming ◽  
Polar Geophysical Institute ◽  
Mesospheric Ozone ◽  
Dynamic Components ◽  
Microwave Data

We present data continuous series of microwave observations of the middle atmosphere in winters 2017-2018, 2018-2019 and 2019-2020. In each of these winters sudden stratospheric warming were marked.Measurements were carried out with the help of mobile ozonemeter (observation frequency 110836.04 MHz), which was established at Polar Geophysical Institute in Apatity (67N, 33E). The parameters of the device allow to measure a spectrum of the ozone emission line for time about 15 min a precision of 2%. On the measured spectra were appreciated of ozone vertical profiles in the layer of 22 60 km which were compared to satellite data MLS/Aura and with the data of ozonesonde at station Sodankyla (67N, 27E). The microwave data on the behavior of mesospheric ozone (altitude 60 km) indicate the presence of bothphotochemical and dynamic components in its changes.

scholarly journals Multi-scale auroral observations in Apatity: winter 2010–2011

2011 ◽  
Vol 1 (1) ◽  
pp. 31-45
Author(s):  
B. V. Kozelov ◽  
S. V. Pilgaev ◽  
L. P. Borovkov ◽  
V. E. Yurov
Keyword(s):  
Spatial Structure ◽  
Vertical Distribution ◽  
Winter Season ◽  
Field Of View ◽  
Geophysical Institute ◽  
Polar Geophysical Institute ◽  
Scaling Properties ◽  
Multi Scale ◽  
Stereoscopic System ◽  
The Web

Abstract. Routine observations of the aurora are conducted in Apatity by a set of five cameras: (i) all-sky TV camera Watec WAT-902K (1/2"CCD) with Fujinon lens YV2.2 × 1.4A-SA2; (ii) two monochromatic cameras Guppy F-044B NIR (1/2"CCD) with Fujinon HF25HA-1B (1:1.4/25 mm) lens for 18° field of view and glass filter 558 nm; (iii) two color cameras Guppy F-044C NIR (1/2"CCD) with Fujinon DF6HA-1B (1:1.2/6 mm) lens for 67° field of view. The observational complex is aimed at investigating spatial structure of the aurora, its scaling properties, and vertical distribution in the rayed forms. The cameras were installed on the main building of the Apatity division of the Polar Geophysical Institute and at the Apatity stratospheric range. The distance between these sites is nearly 4 km, so the identical monochromatic cameras can be used as a stereoscopic system. All cameras are accessible and operated remotely via Internet. For 2010–2011 winter season the equipment was upgraded by special blocks of GPS-time triggering, temperature control and motorized pan-tilt rotation mounts. This paper presents the equipment, samples of observed events and the web-site with access to available data previews.

scholarly journals Interpretation of ionospheric F-region structures in the vicinity of ionisation troughs observed by satellite radio tomography

2001 ◽  
Vol 19 (1) ◽  
pp. 25-36 ◽  
Author(s):  
G. A. Aladjev ◽  
O. V. Evstafiev ◽  
V. S. Mingalev ◽  
G. I. Mingaleva ◽  
E. D. Tereshchenko ◽  
...  
Keyword(s):  
Electric Fields ◽  
Plasma Convection ◽  
Geophysical Institute ◽  
Ion Chemistry ◽  
Polar Geophysical Institute ◽  
Tomographic Images ◽  
F Region ◽  
High Latitude Ionosphere ◽  
Ion Chemistry And Composition ◽  
Electric Fields And Currents

Abstract. Tomographic images of the spatial distribution of electron density in the ionospheric F-region are presented from the Russian-American Tomography Experiment (RATE) in November 1993 as well as from campaigns carried out in northern Scandinavia in November 1995 and in Russia in April 1990. The reconstructions selected display the ionisation troughs above the tomographic chains of receivers during geomagnetically quiet and disturbed periods. Two mathematical models of the high-latitude ionosphere developed in the Polar Geophysical Institute have been applied for interpretation of the observed tomographic images.Key words. Ionosphere (electric fields and currents; ion chemistry and composition; plasma convection)

scholarly journals Nature of gamma radiation variations during atmospheric precipitations

2016 ◽  
Vol 2 (1) ◽  
pp. 78-88 ◽  
Author(s):  
Алексей Германенко ◽  
Aleksey Germanenko ◽  
Юрий Балабин ◽  
Yuriy Balabin ◽  
Борис Гвоздевский ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Radiation ◽  
Radiation Spectrum ◽  
Geophysical Institute ◽  
Satisfactory Description ◽  
Polar Geophysical Institute ◽  
Artificial Radionuclides ◽  
Characteristic Lines ◽  
Series Of Experiments ◽  
Precipitation Events

The Polar Geophysical Institute has developed a complex facility for continuously monitoring various components of secondary cosmic rays. Gamma radiation during precipitation events has been found to increase the year round regardless of the season. A series of experiments has revealed that there is no precipitation pollution by any natural or artificial radionuclides. Radiation spectrum does not have any characteristic lines of elements. We propose a mechanism providing a satisfactory description for this phenomenon.

scholarly journals Comparison of Numerical Simulations of the Electron Density in the D-Region Ionosphere with Measurements of the Radar of Partial Reflections

2019 ◽  
Vol 224 ◽  
pp. 03011
Author(s):  
Aleksandr Gomonov ◽  
Roman Yurik ◽  
Yulia Shapovalova ◽  
Sergei Cherniakov ◽  
Olga Ogloblina
Keyword(s):  
Experimental Data ◽  
Numerical Simulations ◽  
Electron Density ◽  
High Electron ◽  
High Electron Density ◽  
Geophysical Institute ◽  
Partial Reflection ◽  
Polar Geophysical Institute ◽  
D Region ◽  
Good Agreement

The paper reports results of a comparison of the measured electron density in the ionospheric D-region measured using the partial reflection facility at the observatory. Tumanny of the Polar Geophysical Institute (69.0°N, 35.7°E) with numerical simulations performed using the theoretical model of the Polar Geophysical Institute (PGI) (Murmansk, Russian Federation). The model was examined using experimental data obtained under quiet geomagnetic conditions in March, 2017. The comparative analysis carried out in this study shows a very good agreement of the PGI model with experimental data and indicates that the IRI-2016 model fails to adequately reproduce measurements in regions with high electron density gradients.

scholarly journals Multi-scale auroral observations in Apatity: winter 2010–2011

2012 ◽  
Vol 1 (1) ◽  
pp. 1-6 ◽  
Author(s):  
B. V. Kozelov ◽  
S. V. Pilgaev ◽  
L. P. Borovkov ◽  
V. E. Yurov
Keyword(s):  
Spatial Structure ◽  
Vertical Distribution ◽  
Winter Season ◽  
Field Of View ◽  
Geophysical Institute ◽  
Polar Geophysical Institute ◽  
Scaling Properties ◽  
Multi Scale ◽  
Stereoscopic System ◽  
The Web

Abstract. Routine observations of the aurora are conducted in Apatity by a set of five cameras: (i) all-sky TV camera Watec WAT-902K (1/2"CCD) with Fujinon lens YV2.2 × 1.4A-SA2; (ii) two monochromatic cameras Guppy F-044B NIR (1/2"CCD) with Fujinon HF25HA-1B (1:1.4/25 mm) lens for 18° field of view and glass filter 558 nm; (iii) two color cameras Guppy F-044C NIR (1/2"CCD) with Fujinon DF6HA-1B (1:1.2/6 mm) lens for 67° field of view. The observational complex is aimed at investigating spatial structure of the aurora, its scaling properties, and vertical distribution in the rayed forms. The cameras were installed on the main building of the Apatity division of the Polar Geophysical Institute and at the Apatity stratospheric range. The distance between these sites is nearly 4 km, so the identical monochromatic cameras can be used as a stereoscopic system. All cameras are accessible and operated remotely via Internet. For 2010–2011 winter season the equipment was upgraded by special blocks of GPS-time triggering, temperature control and motorized pan-tilt rotation mounts. This paper presents the equipment, samples of observed events and the web-site with access to available data previews.

scholarly journals Peculiarities of soft gamma-radiation variations in the atmosphere

2019 ◽  
Vol 127 ◽  
pp. 01007
Author(s):  
Aleksei Germanenko ◽  
Evgenya Mikhalko ◽  
Evgeny Maurchev ◽  
Boris Gvozdevsky ◽  
Igor Yankovsky
Keyword(s):  
Cosmic Rays ◽  
Gamma Radiation ◽  
Radioactive Contamination ◽  
Geophysical Institute ◽  
Polar Geophysical Institute ◽  
Main Components

Soft gamma-radiation (20-400 keV) arriving from the atmosphere is being monitored by Polar Geophysical Institute (PGI), Apatity, Russia, at several stations located between Spitsbergen and the Causases. In Apatity and Spitsbergen, it has been carried out for ten years already. Detectors of the same type with output integral channels > 20 keV and > 100 keV are used. All the stations record increases in the gammaradiation flux, which are sometimes as high as 100%. These increases occur all the year round, in winter and summer and are recorded at all the stations. A great database on these increases has been used to analyze their characteristics. The detector used in Apatity, is integrated into a complex set carrying out monitoring over the main components of the secondary cosmic rays. According to the earlier experiments, no radioactive contamination has been found in precipitation. The integral and differential data have been analyzed to reveal the peculiarities of the phenomenon studied.

scholarly journals Estimated nitric oxide density in auroras from ground-based photometric data

2019 ◽  
Vol 5 (1) ◽  
pp. 58-61
Author(s):  
Жанна Дашкевич ◽  
Zhanna Dashkevich ◽  
Владимир Иванов ◽  
Vladimir Ivanov
Keyword(s):  
Nitric Oxide ◽  
Numerical Modeling ◽  
Photometric Data ◽  
Time Dependent ◽  
Auroral Ionosphere ◽  
Geophysical Institute ◽  
Polar Geophysical Institute ◽  
Altitude Profile ◽  
Dependent Model ◽  
Time Dependent Model

In this paper, we numerically estimate the nitric oxide density in auroras, using photometric data on 427.8, 557.7, and 630.0 nm emission intensities. The data were obtained at midnight at observatories of the Polar Geophysical Institute. These estimates were made using a numerical modeling procedure with a time-dependent model of the auroral ionosphere [Dashkevich et al., 2017]. It is shown that the NO density in the maximum of the altitude profile is between (1÷3.3)∙10^8 cm–3. The obtained estimates indicate the absence of a correlation between the [NO]max values and 427.8 nm emission intensities.

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