| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | x6e6X3pFwXQZ3DUS8rS5/BQLSL |
| Repository | cptec.inpe.br/walmeida/2004/04.22.11.10 |
| Last Update | 2005:04.01.03.00.00 (UTC) administrator |
| Metadata Repository | cptec.inpe.br/walmeida/2004/04.22.11.10.53 |
| Metadata Last Update | 2021:02.10.18.59.28 (UTC) administrator |
| Secondary Key | INPE-10638-PRE/6100 |
| ISSN | 0894-8755 |
| Citation Key | GanKousRope:2004:SoAmMo |
| Title | The South America monsoon circulation and its relationship to rainfall over west-central Brazil  |
| Year | 2004 |
| Month | jan |
| Access Date | 2024, May 20 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 4137 KiB |
| 2. Context | |
| Author | 1 Gan, Manoel Alonso 2 Kousky, V. E. 3 Ropelewski, C. F. |
| Resume Identifier | 1 8JMKD3MGP5W/3C9JHNM |
| Group | 1 DMD-INPE-MCT-BR |
| Affiliation | 1 CPTEC-INPE- Cachoeira Paulista -12630000- Sao Paulo, Brazil |
| e-Mail Address | fabia@cptec.inpe.br |
| Journal | Journal of Climate |
| Volume | 17 |
| Number | 1 |
| Pages | 47-66 |
| History (UTC) | 2005-04-01 18:07:03 :: Fabia -> administrator :: 2008-06-10 19:50:11 :: administrator -> estagiario :: 2010-05-11 16:53:00 :: estagiario -> administrator :: 2021-02-10 18:59:28 :: 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 | outgoing longwave radiation Australian summer monsoon tropospheric circulation tropical atmosphere onset oscillation precipitation winter variability convection |
| Abstract | The mean atmospheric circulation for the rainy season over west-central Brazil (20degrees - 10degreesS, 60degrees - 50degreesW) is investigated for a 21-yr period (July 1979 - June 2000). The NCEP - NCAR reanalysis, pentad outgoing longwave radiation (OLR), and daily gridded precipitation analyses from NCEP are used in this study. The analysis presented here provides an improved description of the mean annual cycle based on daily and pentad (5-day) rainfall and atmospheric circulation data. The pentad precipitation averaged for the study region shows a rapid increase during the spring months ( September - November) and a rapid decrease in April. The rainiest period ( more than 8 mm day(-1)) is from December to February. There are distinct wet ( 7 months) and dry ( 5 months) seasons, with approximately 90% of the total annual rainfall occurring during October - April. The rainy season begins following the period when temperature is at its seasonal maximum. The pre-rainy-season warmth acts to destabilize the atmosphere and to create a reversal in the low-latitude temperature gradient. This results in a reversal of the vertical shear of the zonal wind from increasing ( decreasing) westerly ( easterly) winds with height to decreasing ( increasing) westerly ( easterly) winds with height. The examination of the vertical structure of the average zonal wind over the area reveals that prior to the onset of the rainy season easterlies prevail in the lower troposphere ( up to 600 hPa) and westerly winds prevail at upper levels with maximum speed in the layer 200 - 150 hPa. During the rainy season the vertical structure of zonal wind is opposite to that of winter ( June - August). Within each rainy season, west-central Brazil experiences anomalously wet and dry periods. Wet periods are associated with low-level northwesterly and westerly flow east of the Andes that converges on west-central Brazil. Dry periods are associated with enhanced northwesterly flow over Paraguay and northern Argentina, and easterly anomalies over west-central Brazil. |
| Area | MET |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDMD > The South America... |
| 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://urlib.net/ibi/x6e6X3pFwXQZ3DUS8rS5/BQLSL |
| zipped data URL | http://urlib.net/zip/x6e6X3pFwXQZ3DUS8rS5/BQLSL |
| Language | en |
| Target File | Gan_The South America monsoon.pdf |
| User Group | administrator |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher6 allowfinaldraft |
| Read Permission | allow from all |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/43SKC35 |
| 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 | |