| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16c.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3P8SECKy/CUaAj |
| Repository | sid.inpe.br/jeferson/2004/07.28.12.50 (restricted access) |
| Last Update | 2006:06.14.04.09.58 (UTC) administrator |
| Metadata Repository | sid.inpe.br/jeferson/2004/07.28.12.50.08 |
| Metadata Last Update | 2018:06.04.04.12.54 (UTC) administrator |
| Secondary Key | INPE-11203-PRE/6652 |
| ISSN | 0016-7169 |
| Citation Key | EcherSchuMakiOkan:2004:ObBrSo |
| Title | Observations of broadband solar UV-A irradiance at Santa Maria, Brazil (29°S, 53° W)  |
| Year | 2004 |
| Month | Jan.-Mar. |
| Access Date | 2024, Apr. 28 |
| Secondary Type | PRE PN |
| Number of Files | 1 |
| Size | 684 KiB |
| 2. Context | |
| Author | 1 Echer, Ezequiel 2 Schuch, Nelson Jorge 3 Makita, K. 4 Okano, S. |
| Resume Identifier | 1 8JMKD3MGP5W/3C9JH3D 2 8JMKD3MGP5W/3C9JHUD |
| Group | 1 DGE-INPE-MCT-BR 2 RSU-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais 2 Centro Regional Sul de Pesquisas Espaciais, CRSPE/INPE 3 Takushoku University - Tokyo 4 National Institute of Polar Research, Tokyo |
| Journal | Geofísica Internacional |
| Volume | 43 |
| Number | 1 |
| Pages | 53-59 |
| History (UTC) | 2006-03-17 17:05:58 :: marciana -> administrator :: 2006-09-27 21:33:22 :: administrator -> marciana :: 2008-05-02 16:20:26 :: marciana -> administrator :: 2018-06-04 04:12:54 :: administrator -> marciana :: 2004 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | Solar radiation solar UV atmosphere atmospheric radiative transfer |
| Abstract | Observations of broadband solar UV-A irradiance (320-400 nm) were made at Santa Maria, Brazil (29° S, 53° W) between September 1993 and December 1996. Two different measurement techniques were used, the direct sun (DS) with the sensor pointed directly to the sun, and the zenith sky (ZS), with the sensor pointed to the zenith. The seasonal variation of UV-A DS and ZS irradiances measured at local noon is analysed. Both UV-A DS and ZS irradiances have a strong seasonal variability, anticorrelated to the solar zenith angle variation. It is shown that UV-A ZS irradiance has a larger seasonal variation than UV-A DS irradiance, with summer/winter ratios of 3.4 for UV-A ZS and 1.4 for UV-A DS. This difference is explained because of the geometrical arrangement of the observations; UV-A DS irradiance is easured tracking the sun and its variability is due to the atmospheric optical path variation during the year. UV-A ZS irradiance is diffuse irradiance measured pointing at a fixed direction, the zenith, and besides the atmospheric optical path variability, the component of direct irradiance incident on the horizontal surface has also a variation with solar zenith angle. Analysing UV-A DS and ZS irradiances versus solar zenith angle, it was observed that UV-A ZS decreases faster with higher solar zenith angles than UV-A DS. Calculations using Beers law at 370 nm were made and show similar behaviour for irradiances at a horizontal surface, compared to UV-A ZS, and at a surface perpendicular to the solar beam, compared to UV-A DS irradiance. |
| Area | CEA |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Observations of broadband... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > CRCRS > Observations of broadband... |
| 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 | Echer1.pdf |
| User Group | administrator alexandra marciana |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher denyfinaldraft |
| Read Permission | deny from all and allow from 150.163 |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3EU29DP 8JMKD3MGPCW/3EUFCFP |
| Dissemination | WEBSCI; PORTALCAPES; AGU. |
| Host Collection | sid.inpe.br/mtc-m18@80/2008/03.17.15.17 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel documentstage 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 | |