| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3r59YDa/JwH5Q |
| Repository | sid.inpe.br/iris@1916/2005/12.21.14.22 (restricted access) |
| Last Update | 2006:06.16.17.16.19 (UTC) administrator |
| Metadata Repository | sid.inpe.br/iris@1916/2005/12.21.14.22.13 |
| Metadata Last Update | 2021:07.18.04.01.21 (UTC) administrator |
| Secondary Key | INPE-13788--PRE/8974 |
| ISSN | 1364-6826 |
| Citation Key | PrestesRigoEcheViei:2006:SpAnSu |
| Title | Spectral analysis of sunspot number and geomagnetic indices 1868-2001  |
| Year | 2006 |
| Month | Jan. |
| Access Date | 2024, Apr. 27 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 277 KiB |
| 2. Context | |
| Author | 1 Prestes, Alan 2 Rigozo, Nivaor Rodolfo 3 Echer, Ezequiel 4 Vieira, Luis Eduardo Antunes |
| Resume Identifier | 1 2 3 8JMKD3MGP5W/3C9JH3D |
| Group | 1 DGE-INPE-MCT-BR 2 DGE-INPE-MCT-BR 3 DGE-INPE-MCT-BR 4 DGE-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE, DGE) 2 Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE, DGE) 3 Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE, DGE) 4 Instituto Nacional de Pesquisas Espaciais, Divisão de Geofísica Espacial (INPE, DGE) |
| Journal | Journal of Atmospheric and Solar-Terrestrial Physics |
| Volume | 68 |
| Number | 2 |
| Pages | 182-190 |
| History (UTC) | 2006-06-16 17:16:19 :: vinicius -> administrator :: 2021-07-18 04:01:21 :: administrator -> marciana :: 2006 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | solar activity spectral analysis sunspot number geomagnetic indices SOLAR-CYCLE SEMIANNUAL VARIATION WIND AP OSCILLATIONS PERIOD |
| Abstract | The multiple-taper spectral analysis was applied to a(a), A(p) and R-z annual and monthly average series (1868-2001). The significant periods at 95% confidence level for annual averages are 11.1 and 10.2 years for R, and 11.1, 5.3, 4.3, 2.7 and 2.1 years for a(a). For monthly averages, the significant periods were 133 (11.1 years) and 17.7 months for R. and 133 (11.1 years), 63.7 (5.3 years), 17.5, 12.7 and 6 months for aa. The periods associated with the solar cycle are observed in both series. The aa spectrum showed in addition a peak near 4.3 years, which is not present in the R-z spectrum. Other works have also shown this peak in geomagnetic activity. This peak is believed to be caused by the dual-peak structure in the a(a). The 22-year Hale cycle was not detected either in R-z or a(a) spectrum in the period 1868-2001, but it was seen in R-z data for 1700-2000 annual averages. The explanation of this 22-year cycle has been questioned and while in some spectral analysis this periodicity has been found, others have failed in its detection. The aa spectrum showed in addition a peak of 6 months, associated to the semi-annual variation of geomagnetic activity. Three hypotheses have been considered to explain the seasonal activity variation. These are the Russell-McPherron effect, the equinoctial effect and the axial effect. |
| Area | CEA |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Spectral analysis 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 | Spectral anaysis of sunspot number.pdf |
| User Group | administrator vinicius |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher denyfinaldraft24 |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | transferred to vinicius |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3EU29DP |
| Dissemination | WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX. |
| Host Collection | sid.inpe.br/banon/2003/08.15.17.40 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel doi e-mailaddress electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |