| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | x6e6X3pFwXQZ3DUS8rS5/Djfpz |
| Repository | cptec.inpe.br/walmeida/2004/08.30.10.19 (restricted access) |
| Last Update | 2005:05.20.03.00.00 (UTC) marciana |
| Metadata Repository | cptec.inpe.br/walmeida/2004/08.30.10.19.51 |
| Metadata Last Update | 2018:06.05.03.51.24 (UTC) administrator |
| Secondary Key | INPE--PRE/ |
| DOI | 10.1016/S0168-1923(00)00209-4 |
| ISSN | 0168-1923 |
| Citation Key | GuFuGaSiHeSiSh:2001:ClMoSu |
| Title | Cloud modulation of surface solar irradiance at a pasture site in southern Brazil  |
| Year | 2001 |
| Month | Jan. |
| Access Date | 2024, Apr. 28 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 406 KiB |
| 2. Context | |
| Author | 1 Gu, Lianhong 2 Fuentesa, Jose D. 3 Garstanga, Michael 4 Silva, Julio Tota da 5 Heitza, Ryan 6 Siglera, Jeff 7 Shugarta, Herman H. |
| Group | 1 2 3 4 CPT-INPE-MCT-BR |
| Affiliation | 1 Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA 2 3 Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA 4 INPE-Sao Jose dos Campos-12227-010-SP-Brasil 5 Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA 6 Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA |
| e-Mail Address | fabia@cptec.inpe.br |
| Journal | Agricultural and Forest Meteorology |
| Volume | 106 |
| Number | 2 |
| Pages | 117-129 |
| History (UTC) | 2005-05-20 13:55:59 :: Fabia -> administrator :: 2008-06-10 19:50:57 :: administrator -> estagiario :: 2010-05-11 16:54:34 :: estagiario -> administrator :: 2012-11-20 03:32:30 :: administrator -> marciana :: 2001 2013-02-08 12:20:06 :: marciana -> administrator :: 2001 2018-06-05 03:51:24 :: 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 | cloud gap effect tropical clouds convective regime turbulence diffusion regime kolmogorov power law |
| Abstract | Broken cloud fields create mosaic radiative landscapes with interchanging cloud-shaded and sunlit areas. While clouds attenuate solar radiation incident on cloud-shaded areas, sunlit ground surfaces mar actually receive more irradiance than under a clear sky due to light scattering and reflection from neighboring clouds. In this paper, we studied these two opposite but closely related aspects of cloud modulation of surface solar irradiance at a pasture site in southern Brazil. We analyzed a high-resolution time series of surface measurements obtained during the 1999 wet season. Surface solar irradiance frequently (more than 20% of lhe time) exceeded clear-sky levels and occasionally surpassed the extraterrestrial radiation. Clouds created a bimodal frequency distribution of surface solar irradiance, producing an average of approximately 50 and 14% for attenuation and enhancement, respectively, as compared to corresponding clear-sky leveI irradiance. The average duration of enhancement periods was about 1/3 of the average duration of attenuation periods. On the daily basis, cloud-induced enhancement contributed an average of 4% of the daily solar input to the surface and compensated for more than 10% of the attenuation due to the presence of clouds. Through spectral analysis, two temporal regimes were shown to modulate the surface irradiance by clouds. One was a convective/mesoscale of tens of minutes to hours and the other was a turbulent scale of several minutes corresponding to the classical Kolmogorov r5/3 power law. |
| Area | MET |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > CGCPT > Cloud modulation 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 | Gu_Cloud.pdf |
| User Group | Fabia administrator marciana |
| 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/3EUPEJL |
| Dissemination | WEBSCI; PORTALCAPES. |
| Host Collection | cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |