Results 31 to 40 of about 8,610,015 (269)
Relative Sunspot Number Observed from 2002 to 2011 at ButterStar Observatory [PDF]
Journal of Astronomy and Space Sciences, 2012 The ButterStar Observatory at the Dongducheon High School has been working for photographic observations of the Sun since October 16, 2002. In this study, we observed the Sun at the ButterStar observatory for 3,364 days from October 16, 2002 to December ...
Sung-Jin Oh, Heon-Young Chang
doaj +1 more source
Centennial Total Solar Irradiance Variation
Remote Sensing, 2022 Total Solar Irradiance (TSI) quantifies the solar energy received by the Earth and therefore is of direct relevance for a possible solar influence on climate change on Earth.
Steven Dewitte +2 more
doaj +1 more source
Relation between Latitude-dependent Sunspot Data and Near-Earth Solar Wind Speed
The Astrophysical Journal, 2023 Solar wind is important for the space environment between the Sun and the Earth and varies with the sunspot cycle, which is influenced by solar internal dynamics.
Qirong Jiao +3 more
doaj +1 more source
Recalibration of the Sunspot-Number: Status Report
Solar Physics, 2023 AbstractWe report progress on the ongoing recalibration of the Wolf sunspot number ($S_{\mathrm{N}}$SN) and group-sunspot number ($G_{\mathrm{N}}$GN) following the release of version 2.0 of$S_{\mathrm{N}}$SNin 2015. This report constitutes both an update of the efforts reported in the 2016 Topical Issue of Solar Physics and a summary of work by the ...
Clette, F. +20 more
openaire +5 more sources
HEMISPHERIC SUNSPOT UNIT AREA: COMPARISON WITH HEMISPHERIC SUNSPOT NUMBER AND SUNSPOT AREA
The Astronomical Journal, 2014 The monthly mean northern and southern hemispheric sunspot numbers (SNs) and sunspot areas (SAs) in the time interval of 1945 January to 2012 December are utilized to construct the monthly northern and southern hemispheric sunspot unit areas (SUAs), which are defined as the ratio of hemispheric SA to SN.
K. J. Li +3 more
openaire +1 more source
Chromospheric seismology above sunspot umbrae [PDF]
, 2015 Context: The acoustic resonator is an important model for explaining the three-minute oscillations in the chromosphere above sunspot umbrae. The steep temperature gradients at the photosphere and transition region provide the cavity for the acoustic ...
G. J. J. Botha +5 more
core +1 more source
Directional time-distance probing of model sunspot atmospheres [PDF]
, 2015 A crucial feature not widely accounted for in local helioseismology is that surface magnetic regions actually open a window from the interior into the solar atmosphere, and that the seismic waves leak through this window, reflect high in the atmosphere ...
Przybylski, Damien +3 more
core +1 more source
Nonparametric monitoring of sunspot number observations
, 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.
Ritter, Christian +5 more
core +1 more source
A Reconstruction of Total Solar Irradiance Based on Wavelet Analysis
Earth and Space Science, 2021 As an important indicator of solar activity, the long‐term total solar irradiance (TSI) observations are needed to uncover the impact of solar activity on Earth's climate.
Haijun Xu, Bin Lei, Zhen Li
doaj +1 more source
Molecular and Cellular Hallmarks of Age‐Related Vestibular Hair Cell Degeneration
Advanced Science, EarlyView.This study utilizes single‐cell RNA‐seq transcriptomes, advanced imaging, and electrophysiology to examine universal and cell‐type‐specific aging signatures of vestibular hair cells. The study shows that impaired hair bundle function is a key driver of age‐related vestibular dysfunction.
Samadhi Kulasooriya +10 more
wiley +1 more source