Removing Bias in Latitude Estimated from Solar Irradiance Time Series

2009 ◽  
pp. 311-322 ◽  
Author(s):  
John R. Sibert ◽  
Anders Nielsen ◽  
Michael K. Musyl ◽  
Bruno Leroy ◽  
Karen Evans
Keyword(s):  
Time Series ◽  
Solar Irradiance

scholarly journals Stellar activity, differential rotation, and exoplanets

2010 ◽  
Vol 6 (S273) ◽  
pp. 89-95 ◽  
Author(s):  
A. F. Lanza
Keyword(s):  
Time Series ◽  
Differential Rotation ◽  
Solar Irradiance ◽  
Giant Planet ◽  
Total Solar Irradiance ◽  
Short Term ◽  
Stellar Activity ◽  
Transiting Planets ◽  
Spot Model ◽  
Spot Activity

AbstractThe photospheric spot activity of some of the stars with transiting planets discovered by the CoRoT space experiment is reviewed. Their out-of-transit light modulations are fitted by a spot model previously tested with the total solar irradiance variations. This approach allows us to study the longitude distribution of the spotted area and its variations versus time during the five months of a typical CoRoT time series. The migration of the spots in longitude provides a lower limit for the surface differential rotation, while the variation of the total spotted area can be used to search for short-term cycles akin the solar Rieger cycles. The possible impact of a close-in giant planet on stellar activity is also discussed.

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>

A simple approach to the synthetic generation of solar irradiance time series with high temporal resolution

Solar Energy ◽  
2011 ◽  
Vol 85 (5) ◽  
pp. 1164-1170 ◽  
Author(s):  
J. Polo ◽  
L.F. Zarzalejo ◽  
R. Marchante ◽  
A.A. Navarro
Keyword(s):  
Time Series ◽  
Temporal Resolution ◽  
Solar Irradiance ◽  
Simple Approach ◽  
High Temporal Resolution ◽  
Synthetic Generation

scholarly journals Predicting Solar Irradiance Using Time Series Neural Networks

2014 ◽  
Vol 36 ◽  
pp. 623-628 ◽  
Author(s):  
A. Alzahrani ◽  
J.W. Kimball ◽  
C. Dagli
Keyword(s):  
Neural Networks ◽  
Time Series ◽  
Solar Irradiance

scholarly journals Solar Noise in 40-year long Total Solar Irradiance Composite Time Series

2021 ◽  
Author(s):  
Jean-Philippe Montillet ◽  
Wolfgang Finsterle ◽  
Gael Kermarrec ◽  
Rok Sikonja ◽  
Margit Haberreiter ◽  
...  
Keyword(s):  
Time Series ◽  
Solar Irradiance ◽  
Total Solar Irradiance

scholarly journals Impact of solar variability on the frequency variability of the Indian summer monsoon

MAUSAM ◽  
2021 ◽  
Vol 52 (1) ◽  
pp. 67-82
Author(s):  
J. R. KULKARNI ◽  
M. MUJUMDAR ◽  
S. P. GHARGE ◽  
V. SATYAN ◽  
G. B. PANT
Keyword(s):  
Time Series ◽  
Summer Monsoon ◽  
Solar Irradiance ◽  
General Circulation ◽  
Large Scale ◽  
Monsoon Season ◽  
Circulation Model ◽  
Solar Constant ◽  
Good Correspondence ◽  
The Impact

Earlier investigations into the epochal behavior of fluctuations in All India Summer Monsoon Rainfall (AISMR) have indicated the existence of a Low Frequency Mode (LFM) in the 60-70 years range. One of the probable sources of this variability may be due to changes in solar irradiance. To investigate this, time series of 128-year solar irradiance data from 1871-1998 has been examined. The Wavelet Transform (WT) method is applied to extract the LFM from these time series, which show a very good correspondence. A case study has been carried out to test the sensitivity of AISMR to solar irradiance. The General Circulation Model (GCM) of the Center of Ocean-Land-Atmosphere (COLA) has been integrated in the control run (using the climatological value of solar constant i.e., 1365 Wm-2) and in the enhanced solar constant condition (enhanced by 10 Wm-2) for summer monsoon season of 1986. The study shows that the large scale atmospheric circulation over the Indian region, in the enhanced solar constant scenario is favorable to good monsoon activity. A conceptual model for the impact of solar irradiance on the AISMR at LFM is also suggested.

Solar irradiance time series derived from high-quality measurements, satellite-based models, and reanalyses at a near-equatorial site in Brazil

2020 ◽  
Vol 117 ◽  
pp. 109478 ◽  
Author(s):  
Germán Salazar ◽  
Christian Gueymard ◽  
Janis Bezerra Galdino ◽  
Olga de Castro Vilela ◽  
Naum Fraidenraich
Keyword(s):  
Time Series ◽  
Solar Irradiance ◽  
High Quality ◽  
Quality Measurements

A posteriori clear-sky identification methods in solar irradiance time series: Review and preliminary validation using sky imagers

2019 ◽  
Vol 109 ◽  
pp. 412-427 ◽  
Author(s):  
Christian A. Gueymard ◽  
Jamie M. Bright ◽  
David Lingfors ◽  
Aron Habte ◽  
Manajit Sengupta
Keyword(s):  
Time Series ◽  
Solar Irradiance ◽  
A Posteriori ◽  
Identification Methods ◽  
Clear Sky ◽  
Preliminary Validation
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