Results 71 to 80 of about 3,439,333 (263)
International Journal of Climatology, EarlyView.Over the past 60 years, noticeable changes have been observed in the main hydroclimatological variables, driven by both natural and anthropogenic factors. In the context of climate change, such behaviour may adversely affect the state's economic activities, as well as increase the recurrence of extreme events in the region.
Ronaldo Guilherme Santos Lima +4 more
wiley +1 more source
Revisiting the Question: The Cause of the Solar Cycle Variation of Total Solar Irradiance
Advances in Astronomy, 2019 The Mg II index and sunspot area are usually used to represent the intensification contribution by solar bright structures to total solar irradiance (TSI) and sunspot darkening, respectively.
N. B. Xiang
doaj +1 more source
Applied Artificial Intelligence, 2022 Solar activity has significant impacts on human activities and health. One most commonly used measure of solar activity is the sunspot number. This paper compares three important non-deep learning models, four popular deep learning models, and their five
Yuchen Dang, Ziqi Chen, Heng Li, Hai Shu
doaj +1 more source
Uniting the Sun’s Hale magnetic cycle and “extended solar cycle” paradigms
Frontiers in Astronomy and Space Sciences, 2022 Through meticulous daily observation of the Sun’s large-scale magnetic field the Wilcox Solar Observatory (WSO) has catalogued two magnetic (Hale) cycles of solar activity.
Scott W. McIntosh +4 more
doaj +1 more source
Reconstruction of solar activity for the last millennium using $^{10}$Be data
, 2003 In a recent paper (Usoskin et al., 2002a), we have reconstructed the concentration of the cosmogenic $^{10}$Be isotope in ice cores from the measured sunspot numbers by using physical models for $^{10}$Be production in the Earth's atmosphere, cosmic ray ...
Alanko, K. +4 more
core +1 more source
Why the Sunspot Cycle Is Double Peaked [PDF]
, 2011 Many sunspot cycles are double peaked. In 1967, Gnevyshev suggested that actually all cycles have two peaks generated by different physical mechanisms, but sometimes the gap between them is too short for the maxima to be distinguished in indices of the ...
K. Georgieva
semanticscholar +1 more source
Relationship between food quality and body size of common vole in different habitats
Pest Management Science, EarlyView.The body size of the common vole in crop fields (alfalfa, rape, cereals) is larger than in less‐cultivated habitats (forests, clearings, set‐aside) and is not related to food quality. Abstract BACKGROUND There is a close relationship between habitat, food and demographic parameters of common vole populations.
Eva Jánová +3 more
wiley +1 more source
On the periodic variations of geomagnetic activity indices Ap and ap [PDF]
Annales Geophysicae, 1998 Yearly averages of geomagnetic activity indices Ap for the years 1967–1984 are compared to the respective averages of ν2·Bs, where v is the solar wind velocity and Bs is the southward interplanetary magnetic field (IMF) component.
H. Schreiber, H. Schreiber
doaj +1 more source
The revised Brussels-Locarno Sunspot Number (1981-2015)
, 2015 In 1981, the production of the international Sunspot Number moved from the Z\"{u}rich Observatory to the Royal Observatory of Belgium, marking a very important transition in the history of the Sunspot Number.
Bulling, Andreas +4 more
core +1 more source
The Minimum of Solar Cycle 23: As Deep as It Could Be? [PDF]
, 2015 In this work we introduce a new way of binning sunspot group data with the purpose of better understanding the impact of the solar cycle on sunspot properties and how this defined the characteristics of the extended minimum of cycle 23.
Balmaceda, Laura A. +7 more
core +1 more source