I Usoskin

Datos Biográficos

ID5597940
NOMBREI Usoskin
NOMBRESI
APELLIDOUsoskin
FIRMAUSOSKIN I
AFILIACIONESUniversity of Oulu
ORCID0000-0001-8227-9081
VERIFICADOSí
TOTAL DE OBRAS8
TOTAL DE CITAS7
TOTAL COMO AUTOR8
TOTAL COMO EDITOR0
PRIMER AÑO DE PUBLICACIÓN2004
AÑO MÁS RECIENTE DE PUBLICACIÓN2026
ÍNDICE H2

  • Full dynamical model (Socol

    Open AccessKseniia Golubenko, I Usoskin et al.ARTICLERadiocarbon2026

    Extreme solar particle events (ESPEs) are caused by rare, enormously strong solar eruptions and can produce globally detectable spikes in tree-ring radiocarbon 14 C, known as Miyake events, which serve as precise chronological tie-points and indicators of extreme solar activity. After production, radiocarbon is subjected to the complex carbon cycle, including large-scale atmospheric transport, which is crucially important for fast and strong Miya…

  • Dendrochronology and Radiocarbon Dating

    Open AccessCharlotte Pearson, Steven W Leavitt et al.ARTICLERadiocarbon2022Citada por: 3Referencias: 123

    Both dendrochronology and radiocarbon ( 14 C) dating have their roots back in the early to mid-1900s. Although they were independently developed, they began to intertwine in the 1950s when the founder of dendrochronology, A. E. Douglass, provided dated wood samples for Willard Libby to test his emerging 14 C methods. Since this early connection, absolutely dated tree-rings have been key to calibration of the Holocene portion of the 14 C timescale…

  • Can the 14 C Production in 1055 Ce Be Affected by Sn1054

    Open AccessF Terrasi, Fabio Marzaioli et al.ARTICLERadiocarbon2020Citada por: 4Referencias: 32

    Annually resolved radiocarbon ( 14 C) measurements on tree rings led to the discovery of abrupt variations in 14 C production attributed to large solar flares. We present new results of annual and subannual 14 C fluctuations in tree rings from a middle-latitude sequoia (California) and a high-latitude pine (Finland), analyzed for the period 1030–1080 CE, to trace a possible impact of the Crab supernova explosion, occurring during the Oort minimum…

  • Possible effect of strong solar energetic particle events on polar stratospheric aerosol

    Open AccessIrina Mironova, I A Mironova et al.ARTICLEEnvironmental Research Letters2014

    This letter presents a summary of a phenomenological study of the response of the polar stratosphere to strong solar energetic particle (SEP) events corresponding to ground level enhancements (GLEs) of cosmic rays. This work is focused on evaluation of the possible influence of the atmospheric ionization caused by SEPs upon formation of aerosol particles in the stratosphere over polar regions. Following case studies of two major SEP/GLE events, i…

  • Influence of a Carrington-like event on the atmospheric chemistry, temperature and dynamics

    Open AccessM Calisto, I Usoskin et al.ARTICLEEnvironmental Research Letters2013

    This study investigates the influence of a major solar proton event (SPE) similar to the Carrington event of 1–2 September 1859 by means of the 3D chemistry climate model (CCM) SOCOL v2.0. Ionization rates were parameterized according to CRAC:CRII (Cosmic Ray-induced Atmospheric Cascade: Application for Cosmic Ray Induced Ionization), a detailed state-of-the-art model describing the effects of SPEs in the entire altitude range of the CCM from 0 t…

  • Clouds blown by the solar wind

    Open AccessMirela Voiculescu, I Usoskin et al.ARTICLEEnvironmental Research Letters2013

    In this letter we investigate possible relationships between the cloud cover (CC) and the interplanetary electric field (IEF), which is modulated by the solar wind speed and the interplanetary magnetic field. We show that CC at mid–high latitudes systematically correlates with positive IEF, which has a clear energetic input into the atmosphere, but not with negative IEF, in general agreement with predictions of the global electric circuit (GEC)-r…

  • Persistent solar signatures in cloud cover

    Open AccessMirela Voiculescu, I UsoskinARTICLEEnvironmental Research Letters2012

    A consensus regarding the impact of solar variability on cloud cover is far from being reached. Moreover, the impact of cloud cover on climate is among the least understood of all climate components. This motivated us to analyze the persistence of solar signals in cloud cover for the time interval 1984–2009, covering two full solar cycles. A spatial and temporal investigation of the response of low, middle and high cloud data to cosmic ray induce…

  • Unusual activity of the Sun during recent decades compared to the previous 11,000 years

    Open AccessSami K Solanki, I Usoskin et al.ARTICLENature2004