| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Repository | sid.inpe.br/mtc-m15@80/2006/08.03.18.32 (restricted access) |
| Last Update | 2006:08.21.14.59.24 (UTC) administrator |
| Metadata Repository | sid.inpe.br/mtc-m15@80/2006/08.03.18.32.24 |
| Metadata Last Update | 2021:02.10.19.05.13 (UTC) administrator |
| Secondary Key | INPE-14151-PRE/9284 |
| Citation Key | ChagasBarb:2006:ImUKSh |
| Title | Impact of UKMO's shortwave scheme on CPTEC's global model  |
| Format | Papel |
| Year | 2006 |
| Secondary Date | 20060821 |
| Access Date | 2024, Apr. 28 |
| Secondary Type | PRE CI |
| Number of Files | 1 |
| Size | 1104 KiB |
| 2. Context | |
| Author | 1 Chagas, Julio Cesar Santos 2 Barbosa, Henrique de Melo Jorge |
| Resume Identifier | 1 8JMKD3MGP5W/3C9JHKE |
| Group | 1 DMD-INPE-MCT-BR 2 DMD-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE), Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) 2 Instituto Nacional de Pesquisas Espaciais (INPE), Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) |
| e-Mail Address | atus@cptec.inpe.br |
| Conference Name | Conference on Atmospheric Radiation, 12. |
| Conference Location | Madison, WI |
| Date | Jul. 10-14 |
| Publisher | AMS |
| Book Title | Proceedings |
| Tertiary Type | Artigos |
| Organization | AMS Committee on Atmospheric Radiation |
| History (UTC) | 2006-08-03 18:32:24 :: estagiario -> simone :: 2006-09-20 13:16:50 :: simone -> administrator :: 2012-10-22 20:55:01 :: administrator -> simone :: 2006 2013-02-20 16:03:15 :: simone -> administrator :: 2006 2021-02-10 19:05:13 :: 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 | radiative atmosphere radiative fluxes parameterizations surface solar |
| Abstract | The parameterization of radiative transfer in the AGCM run at CPTEC/INPE (Center for Weather Forecast and Climate Studies/National Institute for Space Research, hereafter CPTEC) since early nineties is based on the work of Harshvardhan et al. (1987). The original implementation, made at COLA (Center for Ocean-Land-Atmosphere Studies), replaced the eight-exponential-term formulation of Lacis and Hansen (1974) for shortwave water vapor absorption with the five-exponential-term formulation of Davies (1982). This reduced costs and kept column-integrated fluxes, but gave origin to non-realistic oscillations on the heating rate profiles, and the main disadvantage of this old shortwave scheme was the underestimation of the solar radiation absorbed by the atmosphere in comparison to line-byline reference calculations (Plana-Fattori et al., 1997; Souza et al., 1997). The climatic characteristics of CPTECs AGCM were analyzed by Cavalcanti et al. (2002), who con- firmed its deficiencies in simulating the observed radiative fluxes and highlighted the need for improvement on the radiation and cloud parameterizations. Moreover, Tarasova and Cavalcanti (2002) showed that the model systematically overestimates surface solar fluxes if compared to satellite-derived estimates. Overestimation of solar radiation reaching the surface has been a problem for most GCMs worldwide and improvement is being gradually achieved during recent decades (Wild et al., 2006). At CPTEC, an improvement was achieved in 2004 when the eleven-exponential-term formulation of Ramaswamy and Freidenreich (1992) for water vapor shortwave absorption became operational, replacing Daviess formulation. In parallel, efforts are being made to implement and test modern radiative transfer schemes inside CPTECs AGCM (Barbosa and Tarasova, 2006). This paper describes some impacts of the implementation of the UK Met Offices shortwave radiation scheme (Edwards and Slingo, 1996), hereafter UKMO code, on the climatic characteristics of CPTECs AGCM. Section 2 highlights some aspects of UKMOs code implementation. Section 3 presents results of comparisons of current (Harshvardhan et al., 1987; Ramaswamy and Freidenreich, 1992) CPTECs shortwave radiation scheme, hereafter CPTEC code, with UKMO code and line-by-line calculations for typical atmospheric columns. Section 4 presents results of two long-term ensemble integrations of CPTECs AGCM, one with CPTEC code and other with UKMO code, and conclusions are presented in Section 5. |
| Area | MET |
| Arrangement | urlib.net > DIDMD > Impact of UKMO's... |
| 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 | Impact.Chagas.pdf |
| User Group | administrator estagiario simone |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Read Permission | deny from all and allow from sem and allow from restrição |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/43SKC35 |
| Host Collection | cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | archivingpolicy archivist callnumber copyright creatorhistory descriptionlevel dissemination documentstage doi edition editor electronicmailaddress identifier isbn issn label lineage mark mirrorrepository nextedition notes numberofvolumes orcid pages parameterlist parentrepositories previousedition previouslowerunit progress project publisheraddress readergroup rightsholder schedulinginformation secondarymark serieseditor session shorttitle sponsor subject tertiarymark type url versiontype volume |
| 7. Description control | |
| e-Mail (login) | marciana |
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