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Surface solar irradiance varies on scales as small as seconds or meters due to scattering and absorption by the atmosphere. Clouds are the main driver of this variability, but moisture structures in the atmospheric boundary layer and…

Atmospheric and Oceanic Physics · Physics 2024-04-08 Wouter Mol , Bert Heusinkveld , Mary Rose Mangan , Oscar Hartogensis , Menno Veerman , Chiel van Heerwaarden

The attribution of part of global warming to changes in the total solar irradiance (TSI) is an important topic which is not, yet, fully understood. Here, we examine the TSI induced temperature (T) changes on a variety of time scales, from…

Atmospheric and Oceanic Physics · Physics 2015-06-17 Anatoly Erlykin , Arnold Wolfendale

Studies on Sun-climate connection have been carried out for several decades, and almost all of them focused on the effects of solar total irradiation energy. As the second major terrestrial energy source from outer space, the solar wind…

Space Physics · Physics 2017-09-19 Hui Li , Chi Wang , Shengping He , Huijun Wang , Cui Tu , Jiyao Xu , Fei Li , Xiaocheng Guo

The observed variability of the cosmic-ray intensity in the interplanetary space is driven by the evolution of the Sun's magnetic activity over its 11-year quasiperiodical cycle. Investigating the relationship between solar activity indices…

Solar and Stellar Astrophysics · Physics 2022-10-13 Nicola Tomassetti , Bruna Bertucci , Emanuele Fiandrini

Spectroscopic observations of the emission lines formed in the solar transition region (TR) commonly show persistent downflows of the order of 10--15 km/s. The cause of such downflows, however, is still not fully clear and has remained a…

We study the role of galactic cosmic ray (GCR) variability in influencing the rainfall variability in Indian Summer Monsoon Rainfall (ISMR) season. We find that on an average during 'drought' (low ISMR) periods in India, GCR flux is…

Space Physics · Physics 2014-12-03 Badruddin , O. P. M Aslam

A litany of research has been published claiming strong solar influences on the Earth's weather and climate. Much of this work includes documented errors and false-positives, yet is still frequently used to substantiate arguments of global…

Atmospheric and Oceanic Physics · Physics 2015-02-03 Benjamin A. Laken

Numerous observational evidence has suggested the presence of active meteorology in the atmospheres of brown dwarfs. A near-infrared brightness variability has been observed. Clouds have a major role in shaping the thermal structure and…

Earth and Planetary Astrophysics · Physics 2022-05-04 Maxence Lefèvre , Xianyu Tan , Elspeth K. H. Lee , R. T. Pierrehumbert

In the present paper a systematic study is carried out to validate the similarity or degree of relationship between daily terrestrial cosmic rays intensity and three characteristics of about evolution of solar corona, like a number of…

Solar and Stellar Astrophysics · Physics 2019-06-05 D. Sierra-Porta

Sixteen years of meteor radar data from the Canadian Meteor Orbit Radar (CMOR) were used to investigate the link between observed meteor rates and both solar and geomagnetic activity. Meteor rates were corrected for transmitter power and…

Earth and Planetary Astrophysics · Physics 2019-03-20 Margaret D. Campbell-Brown

The influence of solar variability on climate is currently uncertain. Recent observations have indicated a possible mechanism via the influence of solar modulated cosmic rays on global cloud cover. Surprisingly the influence of solar…

Atmospheric and Oceanic Physics · Physics 2011-09-06 Nigel D Marsh , Henrik Svensmark

Growing observational evidence has suggested active meteorology in atmospheres of brown dwarfs (BDs) and directly imaged extrasolar giant planets (EGPs). In particular, a number of surveys have shown that near-IR brightness variability is…

Solar and Stellar Astrophysics · Physics 2019-04-03 Xianyu Tan , Adam P. Showman

Long-term measurements (1972-2015) of the reflectivity of Uranus at 472 and 551 nm display variability that is incompletely explained by seasonal effects. Spectral analysis shows this non-seasonal variability tracks the 11-year solar cycle.…

Atmospheric and Oceanic Physics · Physics 2017-12-20 K. L. Aplin , R. G. Harrison

We report the first observation of a 27 day period component in daily maximum temperature recorded at widely spaced locations in Australia. The 27 day component, extracted by band pass filtering, is correlated with the variation of daily…

Solar and Stellar Astrophysics · Physics 2013-07-04 Ian Edmonds

The solar chromosphere and transition region (TR) form an interface between the Sun's surface and its hot outer atmosphere. Here most of the non-thermal energy that powers the solar atmosphere is transformed into heat, although the detailed…

The proton temperature anisotropy in the solar wind exhibits apparent bounds which are compatible with the theoretical constraints imposed by temperature-anisotropy driven kinetic instabilities. Recent statistical analyses based on…

Space Physics · Physics 2014-09-12 Petr Hellinger , Pavel M. Travnicek

The short term variability of the Galactic cosmic ray flux (CRF) reaching Earth has been previously associated with variations in the global low altitude cloud cover. This CRF variability arises from changes in the solar wind strength.…

Astrophysics · Physics 2009-11-07 Nir J. Shaviv

When entering the heliosphere, Galactic cosmic rays (GCRs) are influenced by magnetic turbulence and Solar wind disturbances, which cause the so-called "solar modulation" effect. Understanding the time-dependent relationship between the…

High Energy Astrophysical Phenomena · Physics 2019-08-06 Bruna Bertucci , Emanuele Fiandrini , Behrouz Khiali , Nicola Tomassetti

The Sun has long been considered a constant star, to the extent that its total irradiance was termed the solar constant. It required radiometers in space to detect the small variations in solar irradiance on timescales of the solar rotation…

Solar and Stellar Astrophysics · Physics 2015-06-11 Sami K. Solanki , Yvonne C. Unruh

Understanding the time-dependent relationship between the Sun's variability and cosmic rays (GCR) is essential for developing predictive models of energetic radiation in space. When traveling inside the heliosphere, GCRs are affected by…

High Energy Astrophysical Phenomena · Physics 2023-03-23 N. Tomassetti , E. Fiandrini , B. Bertucci , F. Donnini , M. Graziani , B. Khiali , A. Reina Conde