| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | x6e6X3pFwXQZ3DUS8rS5/DKSR7 |
| Repository | cptec.inpe.br/walmeida/2004/10.13.16.39 |
| Last Update | 2004:12.22.02.00.00 (UTC) administrator |
| Metadata Repository | cptec.inpe.br/walmeida/2004/10.13.16.39.03 |
| Metadata Last Update | 2022:03.26.18.00.22 (UTC) administrator |
| Secondary Key | INPE-11681-PRE/7040 |
| ISSN | 0894-8755 |
| Citation Key | OyamaNobr:2004:GCSiSt |
| Title | Climatic consequences of a large-scale desertification in northeast Brazil: A GCM simulation study  |
| Year | 2004 |
| Month | aug. |
| Access Date | 2024, May 18 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 857 KiB |
| 2. Context | |
| Author | 1 Oyama, Marcos Daysuke 2 Nobre, Carlos Afonso |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JGQ7 |
| Group | 1 DMA-INPE-MCT-BR |
| Affiliation | 1 CPTEC-INPE-Cachoeira Paulista-12630-000-SP-Brasil |
| e-Mail Address | fabia@cptec.inpe.br |
| Journal | Journal of Climate |
| Volume | 17 |
| Number | 16 |
| Pages | 3203-3213 |
| History (UTC) | 2006-03-28 19:16:16 :: Fabia -> administrator :: 2008-06-10 19:51:02 :: administrator -> estagiario :: 2010-05-11 16:55:10 :: estagiario -> administrator :: 2022-03-26 18:00:22 :: 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 | semi-arid regions july circulation biosphere model global climate deforestation albedo precipitation vegetation roughness dynamics |
| Abstract | The climatic impacts of a large-scale desertification in northeast Brazil (NEB) are assessed by using the Center for Weather Forecasting and Climate Studies-Center for Ocean-Land-Atmosphere Studies (CPTEC-COLA) AGCM. Two numerical runs are performed. In the control run, NEB is covered by its natural vegetation (most of NEB is covered by a xeromorphic vegetation known as caatinga); in the desertification run, NEB vegetation is changed to desert (bare soil). Each run consists of five 1-yr numerical integrations. The results for NEB wet season (March-May) are analyzed. Desertification results in hydrological cycle weakening: precipitation, evapotranspiration, moisture convergence, and runoff decrease. Surface net radiation decreases and this reduction is almost evenly divided between sensible and latent heat flux. Atmospheric diabatic heating decreases and subsidence anomalies confined at lower atmospheric levels are found. The climatic impacts result from the cooperative action of feedback processes related to albedo increase, plant transpiration suppression, and roughness length decrease. On a larger scale, desertification leads to precipitation increase in the oceanic belt close to the northernmost part of NEB (NNEB). In the NEB-NNEB dipole, the anomalies of vertical motion and atmospheric circulation are confined to lower atmospheric levels, that is, 850-700 hPa. At these levels, circulation anomalies resemble the linear baroclinic response of a shallow atmospheric layer (850-700 hPa) to a tropical heat sink placed over NEB at the middle-layer level. Therefore, NEB climate does show sensitivity to a vegetation change to desert. The present work shows the possibility of significant and pronounced climate impacts, on both regional and large scales, if the environmental degradation in NEB continues unchecked. |
| Area | MET |
| Arrangement | urlib.net > BDMCI > Fonds > Produção até 2016 > DMA > Climatic consequences 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 | |
| data URL | http://mtc-m16b.sid.inpe.br/ibi/x6e6X3pFwXQZ3DUS8rS5/DKSR7 |
| zipped data URL | http://mtc-m16b.sid.inpe.br/zip/x6e6X3pFwXQZ3DUS8rS5/DKSR7 |
| Language | en |
| Target File | Oyama_Climatic consequences.pdf |
| User Group | Fabia administrator |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher6 allowfinaldraft |
| Read Permission | allow from all |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/46JKC45 |
| Citing Item List | sid.inpe.br/bibdigital/2022/03.26.17.47 2 |
| Dissemination | WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX. |
| Host Collection | cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel documentstage doi 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 | |