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| Stage II. Preliminary catalogue of the High Speed Streams (HSSs) in the solar wind and the analysis of the geomagnetic activity during the solar cycle no. 23 (1996-2007) |
| Contract no: |
81-021/18.09.2007 |
| Deadline: |
30.06.2008 |
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| Activity II.1. |
- Setting up the HSS catalogue for the interval 1996-2007 (ISS) |
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- HSS is a solar wind flux, which has an increase of 100 km/s between the smallest 3-hr velocity value for a given day and the largest 3-hr value of the following day, lasting for at least two days.
- The catalog, by years, can be found at ISS web site:
http://venus.nipne.ro/new1/HSS_Catalogue.html
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| Activity II.2. |
- The study of the composition of the solar wind plasma in heliosphere (INFLPR) |
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- The solar wind composition was analysed by its main constituents (protons, alpha particles, oxigen, iron) and their distribution in time. The solar wind sources imprint on the registered composition was also analysed.
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| Activity II.3. |
- Analysis of the geomagnetic activity for the solar cycle 23 and reinterpretation of geomagnetic data (1964-1980) from the IGAR archive (IGAR) |
| The following studies were performed: |
- Time evolution of the geomagnetic indices aa, ap, DST during solar cycle 23;
- Correlation analysis of the geomagnetic indices with the HSSs parameters function of their origin;
- Reinterpretation of the geomagnetic data from the Romanian archives;
- The study of long term variability for the measured value of terrestrial magnetic field
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| Activity II.4. |
- Dissemination of results: papers presented at local and international scientific meetings. |
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- European Geosciences Union General Assembly 2008, 13-18 April 2008, Viena, Austia:
- O. Maris, G. Maris, Dynamics of the High Speed Streams in Solar Wind during Solar Cycle 23;
- G. Maris, V. Dobrica, C. Demetrescu, O. Maris, The Geomagnetic Effectiveness of the High Speed Streams (HSSs) in the Solar Wind;
- V. Dobrica, C. Demetrescu, Maping the secular variation. Significance of various trends in data;
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- The Annual Scientific Session of the Faculty of Physics Bucharest University (June 6, 2008)
- C. Pirvutoiu, D. Vladoiu, Periodicities of the Aa Geomagnetic Index;
- Fourth UN/ESA/NASA/JAXA Workshop on the International Heliophysical Year 2007 and Basic Space Science "First Results from the International Heliophysical Year 2007", 2-6 June 2008, Sozopol, Bulgaria
- O. Maris, G. Maris, V. Dobrica, C. Demetrescu, Rapid Solar Wind Impact on the Geomagnetic Variability during four Solar Cycles (Nos. 20 23);
- G. Maris, O. Maris, Characteristics of the High Speed Streams during Polarity Reversals of the Solar Magnetic Field;
- The volume: Recent Advances in Solar and Solar Terrestrial Physics, edited by Research Signpost, India
- Review paper: C. Demetrescu si V. Dobrica, Long-Term Variations in the Geomagnetic Field, any Connectio n to the Solar Activitys.
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