| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZGivnJUY/Q98jm |
| Repository | sid.inpe.br/mtc-m15@80/2007/05.14.13.02 (restricted access) |
| Last Update | 2007:05.14.13.02.07 (UTC) administrator |
| Metadata Repository | sid.inpe.br/mtc-m15@80/2007/05.14.13.02.08 |
| Metadata Last Update | 2021:02.10.23.11.39 (UTC) administrator |
| Secondary Key | INPE--PRE/ |
| DOI | 10.1590/S0044-59672007000100008 |
| ISSN | 0273-1177 |
| Citation Key | AlvesMachPras:2007:EsVaCo |
| Title | Estudo da variabilidade da cobertura de nuvens altas na Amazononia Central  |
| Year | 2007 |
| Secondary Date | 20070123 |
| Month | Jan. |
| Access Date | 2024, Apr. 27 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 531 KiB |
| 2. Context | |
| Author | 1 Alves, Maria Aparecida Senaubar 2 Machado, Luiz Augusto Toledo 3 Prasad, Gannabathula Sri Sesha Durga |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JHMS |
| Group | 1 2 DSA-INPE-MCT-BR |
| Affiliation | 1 Instituto de Aeronáutica e Espaço, Divisão de Ciências Atmosfericas 2 Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC) |
| Author e-Mail Address | 1 2 machado@cptec.inpe.br |
| e-Mail Address | deicy@cptec.inpe.br |
| Journal | Advances in Space Research |
| Volume | 37 |
| Number | 1 |
| Pages | 71-80 |
| Progress | ePrint update |
| History (UTC) | 2008-04-10 11:51:29 :: deicy -> administrator :: 2010-05-12 01:40:56 :: administrator -> banon :: 2010-05-12 14:32:32 :: banon -> administrator :: 2013-02-25 22:42:17 :: administrator -> deicy :: 2007 2013-04-05 15:05:11 :: deicy -> administrator :: 2007 2021-02-10 23:11:39 :: administrator -> marciana :: 2007 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | oscillation clouds cover convection Amazonia |
| Abstract | Foram estudados os fenômenos meteorológicos que ocorrem na Amazônia Central (Manaus) utilizando-se um conjunto de imagens de satélites, com o objetivo de identificar as oscilações que mais contribuem para a variabilidade da cobertura de nuvens, e verificar se há modificações nestas oscilações em anos de El Niño e La Niña. O ciclo anual e o ciclo semi-anual são os principais responsáveis pela variabilidade da cobertura de nuvens altas na região. As oscilações interanuais associadas aos fenômenos El Niño/La Niña também contribuem fortemente para a variabilidade total da cobertura de nuvens altas. As oscilações intra-sazonais e interdiurnas apresentam uma variabilidade menor. Estendendo-se a análise para uma região compreendida de 1,5°S a 6ºS e 68ºW a 54ºW, centrados em Manaus, observa-se que os períodos de 60, 45 e 30 dias possuem maior porcentagem de potência a leste de Manaus; o período de 20 dias possui maior porcentagem de potência no centro (próximo de Manaus); e os períodos de 8, 6 e 4 dias possuem maior porcentagem de potência a oeste de Manaus. As frentes frias que alcançam a janela de 10º de longitude e 2,5º de latitude centrada em Manaus, modulam de alguma forma a atividade convectiva na região de Manaus atuando como uma forçante das oscilações interdiurnas (47% dos casos), das oscilações intra-sazonais, (15%) e das oscilações de 55 a 65 dias (13%). Convém ressaltar que não necessariamente as frentes frias causaram as oscilações. As frentes podem favorecer ou induzir a convecção no local. ABSTRACT: The meteorological phenomena that occur in the Central Amazonia (Manaus) are studied from ISCCP-C1 Satellite- based data. The oscillations that contribute more significantly to the cloud cover variability and its relation to El Niño and La Niña events case identified. The annual and semi-annual oscillation times scales are the main responsible for the variability of the high cloud cover over Manaus. The inter-annual oscillations associated with El Niño and La Niña events also contribute significantly to the total variability of the high cloud cover, while intraseasonal and day-to-day oscillations show a reduced contribution. However, the intraseasonal and day-to-day oscillations are important since they do influence the predictability on short and medium range forecast. The studied region was extended to 21 sections, centered in Manaus. The 60, 45 and 30 day-oscillations exhibited a higher spectral power density percentage over eastern Manaus; the 20 day-oscillations, over the central Manaus; and the 8, 6 and 4 day-oscillations, over western Manaus. The cold fronts that reach central Amazonia modulate convective activity over Manaus region, acting as a forcing for day-to-day oscillations (47% of the cases), intraseasonal oscillations (15%), and 55 to 65 day- oscillations (13%). It is important to point out that the cold fronts did not necessarily establish the oscillations, but they may have favored or induced convection over Manaus region. |
| Area | MET |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSA > Estudo da variabilidade... |
| 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 | pt |
| Target File | AlvesMAS.pdf |
| User Group | administrator banon deicy |
| Visibility | shown |
| Archiving Policy | denypublisher denyfinaldraft24 |
| Read Permission | deny from all and allow from 150.163 |
| 5. Allied materials | |
| Previous Edition | sid.inpe.br/iris@1915/2005/12.16.16.33 |
| Next Higher Units | 8JMKD3MGPCW/43SRC6S |
| Dissemination | WEBSCI; PORTALCAPES; MGA; COMPENDEX. |
| Host Collection | cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel documentstage format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previouslowerunit project readergroup rightsholder schedulinginformation secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |