Results 21 to 30 of about 28,506 (161)

Total solar irradiance using a traceable solar spectroradiometer [PDF]

open access: yesAtmospheric Measurement Techniques
Accurate, precise and traceable measurements of total and spectral solar irradiance measurements are fundamental for solar energy applications, climate studies, and satellite validation.
D. Jaine, J. Gröbner, W. Finsterle
doaj   +1 more source

A Reconstruction of Total Solar Irradiance Based on Wavelet Analysis

open access: yesEarth 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

TSI modeling: A comparison of ground-based Ca II K-line data with space-based UV images from the SDO/AIA instrument

open access: yesJournal of Space Weather and Space Climate
The Total Solar Irradiance (TSI) is an important input for the Earth’s climate. To describe the competing contributions of sunspots and faculae on irradiance variability, the San Fernando Observatory (SFO) irradiance model has two components: One ...
Chapman Gary A.   +2 more
doaj   +1 more source

Solar irradiance in clear atmosphere: study of parameterisations of change with altitude [PDF]

open access: yesAdvances in Science and Research, 2011
Parameterisation of changes of the solar irradiance at ground level with a specific variable (e.g. solar zenithal angle, aerosol optical depth, altitude, etc.) is often used in operational processes because it saves computational time.
A. Oumbe   +6 more
doaj   +1 more source

Magnitudes and timescales of total solar irradiance variability

open access: yesJournal of Space Weather and Space Climate, 2016
The Sun’s net radiative output varies on timescales of minutes to gigayears. Direct measurements of the total solar irradiance (TSI) show changes in the spatially- and spectrally-integrated radiant energy on timescales as short as minutes to as long as a
Kopp Greg
doaj   +1 more source

Solar Radiation Prediction Based on Convolution Neural Network and Long Short-Term Memory

open access: yesEnergies, 2021
Photovoltaic power generation is highly valued and has developed rapidly throughout the world. However, the fluctuation of solar irradiance affects the stability of the photovoltaic power system and endangers the safety of the power grid.
Tingting Zhu   +3 more
doaj   +1 more source

Solar rotational modulations of spectral irradiance and correlations with the variability of total solar irradiance

open access: yesJournal of Space Weather and Space Climate, 2016
Aims: We characterize the solar rotational modulations of spectral solar irradiance (SSI) and compare them with the corresponding changes of total solar irradiance (TSI).
Lee Jae N.   +2 more
doaj   +1 more source

Characteristics of solar UV irradiance

open access: yesMeteorologische Zeitschrift, 1994
Solar UVB irradiance is measured worldwide with the Robertson-Berger sunburn meter whose spectral sensitivity is adapted to the action spectrum of human erythema. Thus, the Robertson-Berger sunburn meter measures the erythemal effective irradiance.
W. Ambach, M. Blumthaler
doaj   +1 more source

Primary, Secondary Metabolites, H2O2, Malondialdehyde and Photosynthetic Responses of Orthosiphon stimaneus Benth. to Different Irradiance Levels

open access: yesMolecules, 2012
The resource availability hypothesis predicts an increase in the allocation to secondary metabolites when carbon gain is improved relative to nutrient availability, which normally occurs during periods of low irradiance.
Mohd Hafiz Ibrahim, Hawa Z. E. Jaafar
doaj   +1 more source

Assessment of the Applicability and Calibration Methods of FY-4A Satellite Surface Solar Radiation Products in Henan Province

open access: yesGaoyuan qixiang
Based on the hourly data of total irradiance observed by 26 ground radiation stations in Henan Province, the paper verified and analyzed the applicability of FY-4A inverted total irradiance products in Henan Province, and The Probability Density Function
Xuan YANG   +5 more
doaj   +1 more source

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