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VARIATION ACTIVITE SOLAIRE [3 records]
Record 1 - internal organization data 2004-10-21
Record 1, English
Record 1, Subject field(s)
- Geophysics
- Space Physics
Record 1, Main entry term, English
- Earth's magnetic field
1, record 1, English, Earth%27s%20magnetic%20field
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- geomagnetic field 2, record 1, English, geomagnetic%20field
correct
- terrestrial magnetic field 3, record 1, English, terrestrial%20magnetic%20field
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
All magnetic objects produce invisible lines of force that extend between the poles of the object. An easy way to visualize this is to spread iron filings on a sheet of paper and place a bar magnet under the paper. The iron filings will arrange themselves around the magnet and along the magnetic field lines. In the simplest terms, Earth can be thought of as a dipole (2-pole) magnet. Magnetic field lines radiate between Earth's north and south magnetic poles just as they do between the poles of a bar magnet. Charged particles become trapped on these field lines (just as the iron filings are trapped), forming the magnetosphere. Earth's magnetic field lines are not as symmetrical as those of the bar magnet. The impact of the solar wind causes the lines facing sunward to compress, while the field lines facing away from the Sun stream back to form Earth's magnetotail. The magnetosphere extends into the vacuum of space from approximately 80 to 60,000 kilometers (50 to 37,280 miles) on the side toward the Sun, and trails out more than 300,000 kilometers (186,500 miles) away from the Sun. 4, record 1, English, - Earth%27s%20magnetic%20field
Record 1, French
Record 1, Domaine(s)
- Géophysique
- Physique spatiale
Record 1, Main entry term, French
- champ magnétique terrestre
1, record 1, French, champ%20magn%C3%A9tique%20terrestre
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- champ géomagnétique 2, record 1, French, champ%20g%C3%A9omagn%C3%A9tique
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Le champ magnétique terrestre trouve son origine au centre de la Terre où les mouvements rapides du magma riche en fer et en nickel transforment la Terre en un immense aimant. En surface ;le champ magnétique varie d’un lieu à l'autre. Cette variation est à l'origine des mouvements de l'aiguille de la boussole lorsque l'on se déplace. Elle permet également à certains animaux, comme les pigeons, de s’orienter. Le champ magnétique varie aussi dans le temps. Les variations dans le temps sont dues à des changements à l'intérieur de la Terre mais aussi à des courants électriques dans la haute atmosphère. Des variations séculaires, associées aux fluctuations dans le noyau de la Terre, sont responsables du déplacement du pôle magnétique nord à travers l'Arctique. Les variations dues à des courants électriques dans la partie ionisée de l'atmosphère(l'ionosphère) sont elles quotidiennes et plus ou moins périodiques. Le champ magnétique peut également varier rapidement lorsque la magnétosphère est perturbée par des changements dans l'activité solaire(orage magnétique). Ces perturbations de notre cavité protectrice sont irrégulières et imprévisibles [...] 3, record 1, French, - champ%20magn%C3%A9tique%20terrestre
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Geofísica
- Física espacial
Record 1, Main entry term, Spanish
- campo geomagnético
1, record 1, Spanish, campo%20geomagn%C3%A9tico
correct, masculine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
- campo magnético terrestre 1, record 1, Spanish, campo%20magn%C3%A9tico%20terrestre
correct, masculine noun
Record 1, Textual support, Spanish
Record 2 - internal organization data 2003-04-16
Record 2, English
Record 2, Subject field(s)
- Astrophysics and Cosmography
- Astrochemistry and Cosmochemistry
Record 2, Main entry term, English
- anomalous component
1, record 2, English, anomalous%20component
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
After this acceleration an as yet unknown fraction diffuses backwards into the inner heliosphere against the solar wind, i.e. the anomalous component is subjected to the effects of solar modulation. 2, record 2, English, - anomalous%20component
Record 2, French
Record 2, Domaine(s)
- Astrophysique et cosmographie
- Astrochimie et cosmochimie
Record 2, Main entry term, French
- composante anormale
1, record 2, French, composante%20anormale
feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Présence anormale de particules de grande énergie dans l’héliosphère. 2, record 2, French, - composante%20anormale
Record number: 2, Textual support number: 1 CONT
Le lent éloignement d’Ulysse des régions équatoriales, jusqu'à une distance radiale d’environ 5 AU à l'aphélie, couplée à la très faible activité solaire constatée pendant la majeure partie de l'année 1997, ont fourni une occasion unique de mesurer la variation radiale réelle de la composante anormale du rayonnement cosmique(ACR) décelée dans l'héliosphère interne, à l'abri d’effets latitudinaux. 3, record 2, French, - composante%20anormale
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2003-04-11
Record 3, English
Record 3, Subject field(s)
- Climatology
- Astrophysics and Cosmography
Record 3, Main entry term, English
- solar activity variation 1, record 3, English, solar%20activity%20variation
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
The study of solar activity variations and of their persistency by examining the historical records of aurorae, sunspots, geomagnetic field and cosmic rays can help in understanding the laws and in constructing models of the Solar-Terrestrial relationships. 1, record 3, English, - solar%20activity%20variation
Record 3, French
Record 3, Domaine(s)
- Climatologie
- Astrophysique et cosmographie
Record 3, Main entry term, French
- variation de l'activité solaire
1, record 3, French, variation%20de%20l%27activit%C3%A9%20solaire
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
[Facteurs du changement climatique :] Parmi les causes [des fluctuations] les plus souvent avancées, citons les variations de l’activité solaire, les modifications des paramètres de l’orbite terrestre, les fluctuations de l’activité volcanique et du champ magnétique ou l’autovariation propre du système climatique. 2, record 3, French, - variation%20de%20l%27activit%C3%A9%20solaire
Record number: 3, Textual support number: 2 CONT
Saison : Période pendant laquelle la variation de l'activité solaire(déplacement, luminosité, chaleur, hauteur du Soleil lors de son passage au méridien...) a des caractères semblables. 3, record 3, French, - variation%20de%20l%27activit%C3%A9%20solaire
Record 3, Spanish
Record 3, Textual support, Spanish
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