Role of Time-Delay Concept in Understanding Mechanism of Total Solar Irradiance Variation and its Effect on the Climate of the Earth

1998 ◽  
pp. 329-342
Author(s):  
Hirokazu Yoshimura
Keyword(s):  
Time Delay ◽  
Solar Irradiance ◽  
Total Solar Irradiance ◽  
The Earth ◽  
Irradiance Variation

Data Fusion of Total Solar Irradiance Composite Time Series Using 40 years of Satellite Measurements: First Results 

2021 ◽  
Author(s):  
Jean-Philippe Montillet ◽  
Wolfgang Finsterle ◽  
Werner Schmutz ◽  
Margit Haberreiter ◽  
Rok Sikonja
Keyword(s):  
Time Series ◽  
Data Fusion ◽  
Solar Irradiance ◽  
Total Solar Irradiance ◽  
Maunder Minimum ◽  
The Sun ◽  
Climate Reconstructions ◽  
The Earth ◽  
First Results ◽  
The Difference

<p><span>Since the late 70’s, successive satellite missions have been monitoring the sun’s activity, recording total solar irradiance observations. These measurements are important to estimate the Earth’s energy imbalance, </span><span>i.e. the difference of energy absorbed and emitted by our planet. Climate modelers need the solar forcing time series in their models in order to study the influence of the Sun on the Earth’s climate. With this amount of TSI data, solar irradiance reconstruction models  can be better validated which can also improve studies looking at past climate reconstructions (e.g., Maunder minimum). V</span><span>arious algorithms have been proposed in the last decade to merge the various TSI measurements over the 40 years of recording period. We have developed a new statistical algorithm based on data fusion.  The stochastic noise processes of the measurements are modeled via a dual kernel including white and coloured noise.  We show our first results and compare it with previous releases (PMOD,ACRIM, ... ). </span></p>

How to calibrate a solar radiometer

2021 ◽  
Author(s):  
Wolfgang Finsterle ◽  
Margit Haberreiter ◽  
Jean-Philippe Montillet
Keyword(s):  
Solar Energy ◽  
Solar Irradiance ◽  
Total Solar Irradiance ◽  
Radiation Budget ◽  
Special Focus ◽  
Energy Applications ◽  
Advantages And Disadvantages ◽  
Technical Developments ◽  
The Earth ◽  
Observation Instruments

<p>Solar radiometers are deployed in many locations on the ground and in space. The radiometers in space are measuring the solar energy input into the Earth system per time and unit area, also known as the Total Solar Irradiance (TSI). TSI radiometers are also used to calibrate Earth Observation instruments and to measure the Total Outgoing Radiation (TOR) at the top of the atmosphere, which is a key component in the Earth Radiation Budget (ERB). Ground-based solar radiometers measure the local irradiance levels, which are used for monitoring of atmospheric properties and solar energy applications.</p><p>Traceability of the radiation measurements to SI units is crucial in all of these applications. However, calibrating and characterising a solar radiometer is a technically challenging task. Depending on the requirements for a specific application, different calibration concepts <span>can be employed in the calibration and characterization process.</span></p><p><span>We will present the currently available calibration concepts, their advantages and disadvantages, and put special focus on recent technical developments, such as the cryogenic standard radiometers for solar irradiance on the ground and in space. </span></p>

scholarly journals On the Fluctuations of the Total Solar Irradiance

1993 ◽  
Vol 157 ◽  
pp. 107-107
Author(s):  
W. Schröder ◽  
H.J. Treder
Keyword(s):  
Solar Irradiance ◽  
Energy Production ◽  
Heat Budget ◽  
Total Solar Irradiance ◽  
The Sun ◽  
Solar Constant ◽  
The Earth ◽  
Major Semi Axis ◽  
Fundamental Quantity ◽  
The Mean

The fundamental quantity for the total solar irradiance is the solar constant J which is determined by the mean Sun-Earth distance and by the energy budget in the interior of the sun. The mean distance is the major semi-axis of the earth orbit and therefore a constant of celestial mechanics. The energy production and transport in the interior of the sun must be constant at least during a Helmholtz-Kelvin period. Actually, the heat budget of the sun is constant during some billion years.

Total Solar Irradiance Variation During Rapid Sunspot Growth

Solar Physics ◽  
2004 ◽  
Vol 222 (1) ◽  
pp. 1-15 ◽  
Author(s):  
H. Jabran Zahid ◽  
Hugh S. Hudson ◽  
Claus FrÖhlich
Keyword(s):  
Solar Irradiance ◽  
Total Solar Irradiance ◽  
Irradiance Variation

scholarly journals Alteration tendencies of upcoming on the upper atmosphere boundary solar radiation and theirs spatial localization

2019 ◽  
pp. 50-58
Author(s):  
V. M. Fedorov ◽  
S. A. Sokratov ◽  
D. M. Frolov
Keyword(s):  
Solar Activity ◽  
Solar Radiation ◽  
Solar Irradiance ◽  
Rotation Axis ◽  
Remote Sensing Data ◽  
Physical Nature ◽  
Total Solar Irradiance ◽  
Total Flow ◽  
The Earth

Satellite measurements of total flow of upcoming to the Earth solar radiation (Total solar irradiance) are performed since 1977. At present time continues measurement series of total flow of upcoming solar radiation are obtained. In long-term measurements of solar radiation the eleven-year cycle and its amplitude is revealed. However in regularity of solar radiation income to the Earth (without consideration of atmosphere) and spatial distribution of it along the Earth surface (solar climate of the Earth) two mechanisms having different physical nature are marked out. One mechanism is related to variation of solar activity. Another mechanism is defined by celestial mechanical processes varying elements of Earth orbit (Earth-Sun distance, tropical year duration, etc.), Earth rotation axis declination and related to it variation in Earth insolation. Performed calculations of Earth insolation related to celestial mechanical processes are the basis for differentiation of remote sensing data on total solar irradiance regarding mechanisms of different physical nature. The possibility of estimation of contribution of solar activity and celestial mechanical processes in variation of total flow of upcoming to the Earth solar radiation is created.

Accurate Monitoring of Terrestrial Aerosols and Total Solar Irradiance: Introducing the Glory Mission

2007 ◽  
Vol 88 (5) ◽  
pp. 677-692 ◽  
Author(s):  
Michael I. Mishchenko ◽  
Brian Cairns ◽  
Greg Kopp ◽  
Carl F. Schueler ◽  
Bryan A. Fafaul ◽  
...  
Keyword(s):  
Solar Irradiance ◽  
Global Climate ◽  
Total Solar Irradiance ◽  
Environmental Research ◽  
Radiative Forcings ◽  
Cloud Properties ◽  
The Earth ◽  
Measurement Strategy ◽  
Total Irradiance ◽  
Earth’S Climate

The NASA Glory mission is intended to facilitate and improve upon long-term monitoring of two key forcings influencing global climate. One of the mission's principal objectives is to determine the global distribution of detailed aerosol and cloud properties with unprecedented accuracy, thereby facilitating the quantification of the aerosol direct and indirect radiative forcings. The other is to continue the 28-yr record of satellite-based measurements of total solar irradiance from which the effect of solar variability on the Earth's climate is quantified. These objectives will be met by flying two state-of-the-art science instruments on an Earth-orbiting platform. Based on a proven technique demonstrated with an aircraft-based prototype, the Aerosol Polarimetry Sensor (APS) will collect accurate multiangle photopolarimetric measurements of the Earth along the satellite ground track within a wide spectral range extending from the visible to the shortwave infrared. The Total Irradiance Monitor (TIM) is an improved version of an instrument currently flying on the Solar Radiation and Climate Experiment (SORCE) and will provide accurate and precise measurements of spectrally integrated sunlight illuminating the Earth. Because Glory is expected to fly as part of the A-Train constellation of Earth-orbiting spacecraft, the APS data will also be used to improve retrievals of aerosol climate forcing parameters and global aerosol assessments with other A-Train instruments. In this paper, we detail the scientific rationale and objectives of the Glory mission, explain how these scientific objectives dictate the specific measurement strategy, describe how the measurement strategy will be implemented by the APS and TIM, and briefly outline the overall structure of the mission. It is expected that the Glory results will be used extensively by members of the climate, solar, atmospheric, oceanic, and environmental research communities as well as in education and outreach activities.

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