A neural network-based local model for prediction of geomagnetic disturbances
(2001) In Journal of Geophysical Research 106(A5). p.8425-8434- Abstract
- This study shows how locally observed geomagnetic disturbances can bepredicted from solar wind data with artificial neural network (ANN)techniques. After subtraction of a secularly varying base level, thehorizontal components X<SUB>Sq</SUB> and Y<SUB>Sq</SUB> of the quiettime daily variations are modeled with radial basis function networkstaking into account seasonal and solar activity modulations. Theremaining horizontal disturbance components DeltaX and DeltaY aremodeled with gated time delay networks taking local time and solar winddata as input. The observed geomagnetic field is not used as input tothe networks, which thus constitute explicit nonlinear mappings from thesolar wind to the locally observed... (More)
- This study shows how locally observed geomagnetic disturbances can bepredicted from solar wind data with artificial neural network (ANN)techniques. After subtraction of a secularly varying base level, thehorizontal components X<SUB>Sq</SUB> and Y<SUB>Sq</SUB> of the quiettime daily variations are modeled with radial basis function networkstaking into account seasonal and solar activity modulations. Theremaining horizontal disturbance components DeltaX and DeltaY aremodeled with gated time delay networks taking local time and solar winddata as input. The observed geomagnetic field is not used as input tothe networks, which thus constitute explicit nonlinear mappings from thesolar wind to the locally observed geomagnetic disturbances. The ANNsare applied to data from Sodankylä Geomagnetic Observatory locatednear the peak of the auroral zone. It is shown that 73% of the DeltaXvariance, but only 34% of the DeltaY variance, is predicted from asequence of solar wind data. The corresponding results for prediction ofall transient variations X<SUB>Sq</SUB>+DeltaX andY<SUB>Sq</SUB>+DeltaY are 74% and 51%, respectively. The local timemodulations of the prediction accuracies are shown, and the qualitativeagreement between observed and predicted values are discussed. If drivenby real-time data measured upstream in the solar wind, the ANNs heredeveloped can be used for short-term forecasting of the locally observedgeomagnetic activity. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/130194
- author
- Gleisner, Hans and Lundstedt, Henrik LU
- organization
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Ionosphere: Current systems, Ionosphere: Modeling and forecasting, Magnetospheric Physics: Solar wind/magnetosphere interactions, Mathematical Geophysics: Modeling
- in
- Journal of Geophysical Research
- volume
- 106
- issue
- A5
- pages
- 8425 - 8434
- publisher
- Wiley-Blackwell
- ISSN
- 2156-2202
- DOI
- 10.1029/2000JA900142
- language
- English
- LU publication?
- yes
- id
- 43e3fb5a-bc7c-4e01-b425-0b9a8bbbfec4 (old id 130194)
- date added to LUP
- 2016-04-04 11:42:27
- date last changed
- 2018-11-21 21:06:39
@article{43e3fb5a-bc7c-4e01-b425-0b9a8bbbfec4,
abstract = {{This study shows how locally observed geomagnetic disturbances can bepredicted from solar wind data with artificial neural network (ANN)techniques. After subtraction of a secularly varying base level, thehorizontal components X<SUB>Sq</SUB> and Y<SUB>Sq</SUB> of the quiettime daily variations are modeled with radial basis function networkstaking into account seasonal and solar activity modulations. Theremaining horizontal disturbance components DeltaX and DeltaY aremodeled with gated time delay networks taking local time and solar winddata as input. The observed geomagnetic field is not used as input tothe networks, which thus constitute explicit nonlinear mappings from thesolar wind to the locally observed geomagnetic disturbances. The ANNsare applied to data from Sodankylä Geomagnetic Observatory locatednear the peak of the auroral zone. It is shown that 73% of the DeltaXvariance, but only 34% of the DeltaY variance, is predicted from asequence of solar wind data. The corresponding results for prediction ofall transient variations X<SUB>Sq</SUB>+DeltaX andY<SUB>Sq</SUB>+DeltaY are 74% and 51%, respectively. The local timemodulations of the prediction accuracies are shown, and the qualitativeagreement between observed and predicted values are discussed. If drivenby real-time data measured upstream in the solar wind, the ANNs heredeveloped can be used for short-term forecasting of the locally observedgeomagnetic activity.}},
author = {{Gleisner, Hans and Lundstedt, Henrik}},
issn = {{2156-2202}},
keywords = {{Ionosphere: Current systems; Ionosphere: Modeling and forecasting; Magnetospheric Physics: Solar wind/magnetosphere interactions; Mathematical Geophysics: Modeling}},
language = {{eng}},
number = {{A5}},
pages = {{8425--8434}},
publisher = {{Wiley-Blackwell}},
series = {{Journal of Geophysical Research}},
title = {{A neural network-based local model for prediction of geomagnetic disturbances}},
url = {{http://dx.doi.org/10.1029/2000JA900142}},
doi = {{10.1029/2000JA900142}},
volume = {{106}},
year = {{2001}},
}