| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m16d.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP7W/397C68B | |||
| Repository | sid.inpe.br/mtc-m19/2011/02.17.15.06 (restricted access) | |||
| Last Update | 2011:12.08.12.57.40 (UTC) administrator | |||
| Metadata Repository | sid.inpe.br/mtc-m19/2011/02.17.15.06.35 | |||
| Metadata Last Update | 2021:07.18.04.01.59 (UTC) administrator | |||
| Secondary Key | INPE--PRE/ | |||
| DOI | 10.1016/j.jastp.2010.12.001 | |||
| ISSN | 1364-6826 | |||
| Citation Key | EliasSilbClua:2011:LoVaSe | |||
| Title | Long-term variation of the semiannual amplitude in the aa index  | |||
| Project | CNPq, Processo 342734/2008-2 | |||
| Year | 2011 | |||
| Month | July | |||
| Access Date | 2024, May 05 | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 1257 KiB | |||
| 2. Context | ||||
| Author | 1 Elias, Ana G. 2 Silbergleit, Virginia M. 3 Clua de Gonzalez, Alicia L. | |||
| Group | 1 2 3 DGE-CEA-INPE-MCT-BR | |||
| Affiliation | 1 Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Argentina 2 c INTECIN, Facultad de Ingeniería, Universidad Nacional de Buenos Aires, FIUBA, Avenida Paseo Colon 850-CABA, 1043 Buenos Aires, Argentina 3 Instituto Nacional de Pesquisas Espaciais (INPE) | |||
| Author e-Mail Address | 1 2 3 alicia@dge.inpe.br | |||
| e-Mail Address | tereza@sid.inpe.br | |||
| Journal | Journal of Atmospheric and Solar-Terrestrial Physics | |||
| Volume | 73 | |||
| Number | 11-12 | |||
| Pages | 1492-1499 | |||
| History (UTC) | 2011-12-27 15:23:56 :: marciana -> tereza@sid.inpe.br :: 2010 2012-01-09 18:00:58 :: tereza@sid.inpe.br :: 2010 -> 2011 2012-01-09 18:01:03 :: tereza@sid.inpe.br -> administrator :: 2011 2021-07-18 04:01:59 :: administrator -> tereza@sid.inpe.br :: 2011 | |||
| 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 | Geomagnetic activity Semiannual variation | |||
| Abstract | The long-term variation of the semiannual amplitude in the geomagnetic activity index aa is analyzed with the purpose of contributing to the understanding of solar variability, directly linked to geomagnetic variability. The time series of the semiannual oscillation amplitude, obtained through a wavelet analysis of the daily aa series, presents a long-term variation similar to that shown by solar and geomagnetic indices, like aa itself or Dst. However, the maximum in the semiannual amplitude series occurs around 1947, almost 10 years before it occurs in solar and geomagnetic indices time series. The phase of the semiannual oscillation fluctuates around the values predicted by the equinoctial and Russell-McPherron models, with a predominance of the equinoctial mechanism during the period of maximum semiannual amplitude. A possible source of changes in the equinoctial mechanism would be the secular variation of the Earth's dipole tilt. But, since it does not follow the semiannual amplitude trend, at first sight, it seems not to be responsible for the equinoctial predominance around 1947. The analysis of quiet and disturbed days separately indicates that only disturbed days present the semiannual annual amplitude maximum around 1947, so the 10 year time shift could be due to the mechanism responsible for the semiannual variation in geomagnetically active periods. | |||
| Area | CEA | |||
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Long-term variation of... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| Language | en | |||
| User Group | administrator marciana tereza@sid.inpe.br | |||
| Visibility | shown | |||
| Archiving Policy | denypublisher denyfinaldraft24 | |||
| Read Permission | deny from all and allow from 150.163 | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Mirror Repository | sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53 | |||
| Next Higher Units | 8JMKD3MGPCW/3EU29DP | |||
| Dissemination | WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX. | |||
| Host Collection | sid.inpe.br/mtc-m19@80/2009/08.21.17.02 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn label lineage mark nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress readergroup resumeid rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject targetfile tertiarymark tertiarytype typeofwork url | |||
| 7. Description control | ||||
| e-Mail (login) | tereza@sid.inpe.br | |||
| update | ||||