Отраслевые подборки (УДК)
Издания подборки 21 - 30 из 4647
21.

Количество страниц: 4 с.

By using satellite magnetic field measurements it is shown that before the substorm expansion phase onset the field-aligned currents of zone 2 type are not always observed on the geosynchronous orbits at the midnight sector. The relationship between the appearance of the field-aligned currents of zone 2 types before the beginning of the substorm expansion phase and the active phase duration and the preceding magnetic disturbance level has been found. It is found that if the expansion phase lasts less than 11 min, the appearance probability of the field-aligned current of zone 2 type before the substorm expansion phase onset T0 decreases. As the geomagnetic activity rises before a substorm, the probability of the beginning of the field-aligned currents before T0 increases. These results indicate that substorms in which the field-aligned currents of zone 2 type the T0 onset are absent, can be probably developed in the distant part of the magnetotail.

Boroyev, R. N. Dynamics of the field-aligned current during substorms with a sharp onset of the expansion phase / R. N. Boroyev // Proceedings of the Fifth International Conference on Substorms : 16-20 May 2000 Congress Centre of the Arctic and Antarctic Research Institute, St. Petersburg, Russia. − Noordwijk, Netherlands : European Space Agency, 2000. − P. 377-380.

22.

Количество страниц: 4 с.

The spatial-temporal distribution of westward electrojets in the northern hemisphere has been investigated using geomagnetic ground observation data for November 9-10, 2004 geomagnetic storm. It is shown that the location of the maximum westward electrojet depends on the IMF orientation. It is in the evening or morning sector when Bγ0. With the increase of positive IMF Bγ, the region of intensity maximum shifts to morning hours. Thus, the azimuthal IMF component not only controls the pattern of magnetospheric convection, but also affects the longitudinal location of the westward electrojet pattern during the magnetic storm.

Influence of IMF by on the location of western electrojets during the magnetic storm on Nov. 9-10, 2004 / R. N. Boroev, A. Du, S. I. Solovyev, W.-Y. Xu, G.-X. Chen, V. A. Velichko // Physics of auroral phenomena : proceedings of the 29th annual seminar, Apatity, 27 February–3 March 2006. – 2007. – P. 21-24.

23.

Количество страниц: 4 с.

The dependence of the longitudinal substorm center localisation on geosynchronous orbits on the IMF Bγ-component has been studied. It is shown that the local magnetic time of the longitudinal substorm center localisation in the magnetosphere varies from evening hours to morning hours as the Bγ-component increases. At low solar wind speeds the substorm centers localize nearer to the evening sector. The ionospheric projection of the substorm center magnetospheric localisation shifts westward at By0. Maximum longitudinal shifts of substorm centers in the ionosphere relative to their location in the magnetosphere are - 3.5 h at Bγ=-4 nT and 3.5 h at Bγ=4.4 nT. Thus, the change of the substorm center localisation relative to the midnight in the ionosphere is caused by both the change of the substorm center position in the magnetosphere and a turn of the magnetotail relative to X-axis.

Boroyev, R. N. Dependence of longitudinal localization of substorm center on geosynchronous orbits on the IMF Bγ-component / R. N. Boroyev, M. G. Gelberg // Proceedings of the Fifth International Conference on Substorms : 16-20 May 2000 Congress Centre of the Arctic and Antarctic Research Institute, St. Petersburg, Russia. − Noordwijk, Netherlands : European Space Agency, 2000. − P. 41-44.

24.

Количество страниц: 2 с.

Development of DPY currents and auroral convection electrojets during the growth phase of a substorm accocding to geomagnetic observations data : [тезисы докладов] / R. N. Boroev, A. V. Moiseyev, S. I. Solovyev, M. Engebretson, K. Yumoto // Physics of auroral phenomena : 26th annual seminar, 25-28 February 2003 : abstacts. – 2003. – P. 21.

25.

Количество страниц: 4 с.

By using data treatment results of mid-latitude geomagnetic variations, the significant increase of the local current system intensity with the eastern direction current system, arising near the meridian of expected substorm center ~10-30 min before the break-up onset, has been found. A comparison of longitudinal sizes of two current system, forming the substorm disturbance before and after the onset of the substorm expansion phase, has been carried out. The longitudinal size of the current loop of the substorm growth phase is nearly twice as small as azimuth scale of the substorm current wedge, and the current strength is as week as 2.7-12 times.

Boroyev, R. N. Local increase of field-aligned current intensity before a substorm onset / R. N. Boroyev, V. A. Velichko, D. G. Baishev // Proceedings of the Fifth International Conference on Substorms : 16-20 May 2000 Congress Centre of the Arctic and Antarctic Research Institute, St. Petersburg, Russia. − Noordwijk, Netherlands : European Space Agency, 2000. − P. 279-282.

26.

Издательство: Center for Northeast Asian Studies, Tohoku University

Год выпуска: 2003

Количество страниц: 16 с.

27.
Авторы:
Bridges Levi, Бриджс Леви

Год выпуска: 2022

О последствиях иностранных санкций для исследований многолетней мерзлоты в Якутии. Комментарии директора Арктической программы Центра исследований климата Вудвела Сью Натали, исследователя мерзлотоведения Университета Аляски (г. Фэйрбэнкс) Александра Холодова, профессора наук о системах Земли Цюрихского Университета Габриэлы Шэпман-Страб, заместителя директора Института Мерзлотоведения им. П. И. Мельникова (г. Якутск) Александра Федорова
28.
Авторы:
Brown Alison, Браун Элисон, Иванова-Лоу Татьяна, Пирс Элеонор, Аргунова-Лоу Татьяна Ивановна, Пирс Элеонор

Год выпуска: 2015

О мастер-классах по резьбе из мамонтовой кости для студентов и косторезов, организованных Национальным художественным музеем Республики Саха (Якутия) и Университетом Абердина (Шотландия)
29.
Авторы:
Bruggen Ernst von der, Брюгген Эрнст фон дер

Издательство: Buchdrukerei der Kaiserlichen Akademie der Wissenschaften

Год выпуска: 1909

Количество страниц: 60 с.

30.
Авторы:
Bunyan Rachael , Буньян Рэйчел

Год выпуска: 2021

О небывалой жаре в Якутии