Výsledky vyhledávání - "I. V. Koudriavtsev"

Possible contribution of surface temperature variation to the radiocarbon concentration in the Earth’s atmosphere

Autor: Yu. A. Nagovitsyn, Maxim Ogurtsov, V. M. Ostryakov, I. V. Koudriavtsev, V. A. Dergachev

Publikováno v: Geomagnetism and Aeronomy. 55:931-937

Data on the cosmogenic isotope (14C) concentration in the Earth’s atmosphere are widely used to reconstruct solar activity in past epochs. However, the concentration of this isotope in the atmosphere (Δ14C) and tree rings can also be affected by c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec053897c12dde5100e40864958f27f3
https://doi.org/10.1134/s0016793215070178

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On the influence of climatic factors on the ratio between the cosmogenic isotope 14C and total carbon in the atmosphere in the past

Autor: I. V. Koudriavtsev, Maxim Ogurtsov, Högne Jungner, V. A. Dergachev, Yury A. Nagovitsyn

Publikováno v: Geochronometria. 41:216-222

Radiocarbon 14C is a cosmogenic isotope, which is most extensively used by scientists from a wide variety of fields. Its rate of generation in the atmosphere depends on solar modulation and thus, studying 14C concentration in natural archives, one ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::369bbb2b98f594407b008d48a35da044
https://doi.org/10.2478/s13386-013-0161-2

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Isotopic imprint of the Solar system encounter with interstellar gas cloud around 660 BC (2610 BP)

Autor: Maxim Ogurtsov, A. N. Konstantinov, D. A. Frolov, V. M. Ostryakov, A.K. Pavlov, I. V. Koudriavtsev, A. V. Blinov, G. I. Vasilyev

Publikováno v: Journal of Physics: Conference Series. 1400:022034

We analyse the long lived radionuclide data (14C, 10Be and 36Cl) in tree rings and Greenland ice cores referred to the 660 BC event. The hypotheses of solar superflare impact on the atmosphere and Solar system collision with small sized dense interst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3055baf02fd4465dfe423e6dfc99bc74
https://doi.org/10.1088/1742-6596/1400/2/022034

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On the reconstruction of the energy distribution of electrons accelerated in solar flares

Autor: M. I. Savchenko, Yu. E. Charikov, G. A. Matveev, I. V. Koudriavtsev, G. G. Motorina, D. V. Skorodumov, V. P. Lazutkov

Publikováno v: Technical Physics. 57:1618-1622

A technique for reconstructing energy spectra of electrons accelerated in solar flares is suggested that is based on the rigorous solution of the inverse problem considering their X-ray bremsstrahlung. Model calculations are made for various spectra,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7ad0d59bc5d678d5c882ece7e4fb743
https://doi.org/10.1134/s1063784212120201

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Variations in tree ring stable isotope records from northern Finland and their possible connection to solar activity

Autor: Högne Jungner, V. A. Dergachev, Maxim Ogurtsov, I. V. Koudriavtsev, Emmi Hilasvuori, Eloni Sonninen

Publikováno v: Journal of Atmospheric and Solar-Terrestrial Physics. 73:383-387

Within a project on climate in Europe during the past few hundred years we have collected a record on stable isotope ratios 13 C/ 12 C and 18 O/ 16 O in tree ring cellulose from pine trees in northern Finland. The records cover the time interval 1600

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ffedfb717c081b22a80a9df2a8a92c3
https://doi.org/10.1016/j.jastp.2010.02.020

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