| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | marte3.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3r59YCT/H37EU |
| Repository | sid.inpe.br/iris@1905/2005/08.02.21.49.34 (restricted access) |
| Last Update | 2013:05.15.17.03.42 (UTC) jefferson |
| Metadata Repository | sid.inpe.br/iris@1905/2005/08.02.21.49.37 |
| Metadata Last Update | 2021:07.18.04.00.42 (UTC) administrator |
| Secondary Key | INPE-8674-PRE/4410 |
| ISSN | 1364-6826 |
| Label | 9633 |
| Citation Key | ClúadeGonzalezSilbGonzTsur:2001:AnVaGe |
| Title | Annual variation of geomagnetic activity  |
| Project | CNPq (391544/91-3; 300004/91-5) |
| Year | 2001 |
| Secondary Date | 20010307 |
| Month | Mar. |
| Access Date | 2024, May 02 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 420 KiB |
| 2. Context | |
| Author | 1 Clúa de Gonzalez, Alicia Luisa 2 Silbergleit, Virginia M. 3 Gonzalez, Walter Demétrio 4 Tsurutani, Bruce T |
| Group | 1 DGE-INPE-MCT-BR 2 3 DGE-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Facultad de Ingenieria, Universidad de Buenos Aires, Argentina 3 Instituto Nacional de Pesquisas Espaciais (INPE) 4 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA |
| Author e-Mail Address | 1 alicia@dge.inpe.br 2 3 gonzalez@dge.inpe.br |
| Journal | Journal of Atmospheric and Solar-Terrestrial Physics |
| Volume | 63 |
| Number | 4 |
| Pages | 367-374 |
| History (UTC) | 2013-03-13 23:29:10 :: administrator -> jefferson :: 2001 2013-05-15 17:03:43 :: jefferson -> administrator :: 2001 2021-07-18 04:00:42 :: administrator -> marciana :: 2001 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Version Type | publisher |
| Keywords | geomagnetismo variaçôes anuais indices geomagnetism annual variations indexes (ratios) |
| Abstract | The annual variation of geomagnetic activity is studied through the geomagnetic indices aa, Dst and AE, according to different levels of intensity for each of the indices. For thresholds that correspond from moderate to fairly intense storms (i.e., peak aa greater than or equal to 90), the distribution follows the well-known pattern of a seasonal variation, with maxima around the equinoxes and minima near the solstices. Deviations from this behavior are observed when the distribution refers to levels associated with the occurrence of more intense storms. In particular, the annual distribution of days with a geomagnetic index a greater than about 90, shows the occurrence of a peak in July. The contribution of very intense storms (aa greater than or equal to 210)to the July peak, seems to be evenly distributed along the 12 solar cycles covered by this index. Furthermore, the indices Dst and AE, although restricted to a much shorter interval of time (they have been recorded only since 1957), seem as well to show the existence of a peak of occurrence for July. The study done for the indices Dst and AE gives some indication for the existence of another peak in November, also for thresholds associated with intense storms. However, due to the lack of longer records for these indices, the real existence of this peak in the geomagnetic activity is questionable. A statistical analysis of the distribution of events according to the levels of intensity of the aa and Dst is also presented. From this analysis it is seen that the number of occurrences of storms above a given level of intensity of those geomagnetic indices, can be approximated by an exponential law. Furthermore, an estimation of the occurrence of storms during a solar cycle as a function of the peak aa (or aa*) has been also done. |
| Area | CEA |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Annual variation of... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | 1-s2.0-S1364682600001905-main.pdf |
| User Group | administrator jefferson |
| Visibility | shown |
| Archiving Policy | denypublisher denyfinaldraft24 |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | not transferred |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3EU29DP |
| Dissemination | WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX. |
| Host Collection | sid.inpe.br/banon/2001/04.03.15.36 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel doi e-mailaddress format isbn lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress readergroup resumeid rightsholder schedulinginformation secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |