Abstract and keywords
Abstract (English):
The Yakutsk Meridional Chain (YMC) of IKFIA SB RAS, located along the 190° magnetic meridian, is equipped with geophysical and radiophysical instruments for monitoring space weather in northeast-ern Russia. YMC includes four basic stations in Yakutsk, Tixie, Zhigansk, and Maymaga, and six additional observation sites in Neryungri, Zyryanka, Kystatyam, Dzhardzhan, Chokurdakh, and Kotelny Island. It provides continuous monitoring of near-Earth space in order to obtain data on magnetic field variations, cosmic radio noise, VLF radiation, and ionospheric parameters in the complex upper atmosphere – ionosphere –magnetosphere system. In addition, long-term experimental research into space weather effects on human health is conducted at Tixie and Yakutsk. The report describes the meridional chain of instruments at subauroral and auroral latitudes and gives a brief overview of scientific results of monitoring and investigation into space weather effects in Yakutia. It also observes participation of IKFIA SB RAS in international projects (Intermagnet, MAGDAS, GIRO).

meridional chain, magnetometer, digisonde, space weather
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The widely used term “space weather” introduced in recent years denotes environmental conditions in near-Earth space. Space weather is the main object of aeronomy research conducted by IKFIA SB RAS. Environmental conditions comprise interrelated physical processes in different regions of near-Earth space, which are driven by solar activity.

There are diverse manifestations of these processes in the upper atmosphere and near-Earth space. The study of regularities of space weather formation relies on the fact that space weather affects meteorological processes in the lower and middle atmosphere, the reli-ability of operation of different technical systems in space and on Earth, and human health.

Many countries have now enacted a national program to study space weather effects. A number of inter-national programs are aimed at indepth studies of conditions in near-Earth space and their impact on the human environment, as well as at the study of global climatic changes on Earth – International Living with a Star (ILWS) Program, Climate and Weather of the Sun–Earth System (CAWSES), International Space Weather Initiatives (ISWI), and others.

In this paper, we present a review of the space weather research and results obtained at IKFIA SB RAS in Russia. The Yakutsk Meridional Chain (YMC) and the main instrumentation are described in Section “Methods and Instrumentation”. New results of optical, ionospheric, VLF emissions, atmospheric electricity, cosmic noise absorption, and multi-instrumental observations in Yakutia are given in Section “Results from the Yakutsk Meridional Chain”. Participation of IKFIA SB RAS in international projects through the application of available multi-instrumental base is described in Section “International Cooperation”.


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