Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Frédéric Clette"'
Autor:
Hisashi Hayakawa, Sabrina Bechet, Frédéric Clette, Hugh S. Hudson, Hiroyuki Maehara, Kosuke Namekata, Yuta Notsu
Publikováno v:
The Astrophysical Journal Letters, Vol 954, Iss 1, p L3 (2023)
The Carrington flare in 1859 September is a benchmark, as the earliest reported solar flare and as an event with one of the greatest terrestrial impacts. To date, no rigorous estimate of the energy of this flare has been made on the basis of the only
Externí odkaz:
https://doaj.org/article/e9064065014a4fe0b43198d8ee2d5f0e
Autor:
Hisashi Hayakawa, Edward W. Cliver, Frédéric Clette, Yusuke Ebihara, Shin Toriumi, Ilaria Ermolli, Theodosios Chatzistergos, Kentaro Hattori, Delores J. Knipp, Séan P. Blake, Gianna Cauzzi, Kevin Reardon, Philippe-A. Bourdin, Dorothea Just, Mikhail Vokhmyanin, Keitaro Matsumoto, Yoshizumi Miyoshi, José R. Ribeiro, Ana P. Correia, David M. Willis, Matthew N. Wild, Sam M. Silverman
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 1, p 23 (2023)
We review observations of solar activity, geomagnetic variation, and auroral visibility for the extreme geomagnetic storm on 1872 February 4. The extreme storm (referred to here as the Chapman–Silverman storm) apparently originated from a complex a
Externí odkaz:
https://doaj.org/article/4d98aca0caf64b43b4c01c0e7701b264
Autor:
Sophie Mathieu, Laure Lefèvre, Rainer von Sachs, Véronique Delouille, Christian Ritter, Frédéric Clette
Publikováno v:
Journal of Quality Technology, Vol. 55, no. 1, p. 104-118 (2023)
Solar activity is an important driver of long-term climate trends and must be accounted for in climate models. Unfortunately, direct measurements of this quantity over long periods do not exist. The only observation related to solar activity whose re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6305a34a089cd3bbcec115b696079c9c
https://doi.org/10.1080/00224065.2022.2041376
https://doi.org/10.1080/00224065.2022.2041376
Autor:
Frédéric Clette
Publikováno v:
Journal of Space Weather and Space Climate, Vol 11, p 2 (2021)
The $F_{10.7cm}$ radio flux and the Sunspot Number are the most widely used long-term indices of solar activity. They are strongly correlated, which led to the publication of many proxy relations allowing to convert one index onto the other. However,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a271998f15ab7e53457d98186dc61db
http://arxiv.org/abs/2301.02588
http://arxiv.org/abs/2301.02588
The recalibration of the sunspot number series, the primary long-term record of the solar cycle, requires the recovery of the entire collection of raw sunspot counts collected by the Zurich Observatory for the production of this index between 1849 an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a37c209a205db4bd99b4cc1992c540e1
We will present the international effort that led to the first-ever revision of the Sunspot and Group Numbers (let us call them "the Sunspot Series"), a well-known series that had never been put into question since its creation by Rudolf Wolf in 1849
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a21bd651dfa2fcf73398522ef8bcc22
https://doi.org/10.5194/ems2022-607
https://doi.org/10.5194/ems2022-607
Autor:
Shantanu Jain, Tatiana Podladchikova, Astrid M. Veronig, Olga Sutyrina, Mateja Dumbović, Frédéric Clette, Werner Pötzi
The sun’s magnetic field drives the 11-year solar cycle, and predicting its strength has practical importance for many space weather applications. Previous studies have shown that analysing the solar activity of the two hemispheres separately inste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbb4d9c6ff2a5fdd89897ebd1e297cce
https://www.bib.irb.hr/1245963
https://www.bib.irb.hr/1245963
Publikováno v:
Solar physics, 296 (8
The focus of this article is a re-count of Richard Carrington’s original sunspot observations from his book drawings (Carrington in Observations of the Spots on the Sun from November 9, 1853, to March 24, 1861 Made at Redhill, Williams and Norgate,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee449380a7141c4f4cdf25f97841a03d
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/331459
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/331459
Autor:
Tatiana Podladchikova, Shantanu Jain, Astrid M. Veronig, Olga Sutyrina, Mateja Dumbović, Frédéric Clette, Werner Pötzi
Publikováno v:
Astronomy & Astrophysics. 663:A88
Forecasting the solar cycle amplitude is important for a better understanding of the solar dynamo as well as for many space weather applications. We demonstrated a steady relationship between the maximal growth rate of sunspot activity in the ascendi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17ba555330059fb00dce831c4e588efd
https://doi.org/10.1051/0004-6361/202243509
https://doi.org/10.1051/0004-6361/202243509
Autor:
Shantanu Jain, Tatiana Podladchikova, Astrid M. Veronig, Olga Sutyrina, Mateja Dumbovic, Frédéric Clette, Werner Pötzi
The 11-Year solar cycle is driven by the sun's magnetic field. The sunspot number is the most-common long term index of solar activity and prediction of its amplitude can help to understand the physics of the solar dynamo and the effects of space wea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=57a035e5b1ae::797528d152706892a670da01817ca37a
https://www.bib.irb.hr/1179455
https://www.bib.irb.hr/1179455