| 1. Identity statement | ||||
| Reference Type | Conference Paper (Conference Proceedings) | |||
| Site | mtc-m16b.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Repository | cptec.inpe.br/adm_conf/2005/10.13.18.20 | |||
| Last Update | 2006:04.16.14.21.32 (UTC) administrator | |||
| Metadata Repository | cptec.inpe.br/adm_conf/2005/10.13.18.20.51 | |||
| Metadata Last Update | 2018:06.05.03.42.37 (UTC) administrator | |||
| Citation Key | DrumondAmbr:2006:RoSoIn | |||
| Title | The role of the South Indian and South Pacific oceans on the South American monsoon variability  | |||
| Format | CD-ROM, On-line. | |||
| Year | 2006 | |||
| Access Date | 2025, Aug. 02 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 336 KiB | |||
| 2. Context | ||||
| Author | 1 Drumond, Anita Rodrigues de Moraes 2 Ambrizzi, Tercio | |||
| Affiliation | 1 Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, Universidade de Sao Paulo (IAG/USP) 2 Rua do Matao, 1226, 05508-090, Sao Paulo, SP, Brazil (Drumond,Ambrizzi) | |||
| Author e-Mail Address | 1 anitadru@model.iag.usp.br 2 ambrizzi@model.iag.usp.br | |||
| Editor | Vera, Carolina Nobre, Carlos | |||
| e-Mail Address | anitadru@model.iag.usp.br | |||
| Conference Name | International Conference on Southern Hemisphere Meteorology and Oceanography, 8 (ICSHMO). | |||
| Conference Location | Foz do Iguaçu | |||
| Date | 24-28 Apr. 2006 | |||
| Publisher | American Meteorological Society (AMS) | |||
| Publisher City | 45 Beacon Hill Road, Boston, MA, USA | |||
| Pages | 1021-1023 | |||
| Book Title | Proceedings | |||
| Tertiary Type | Poster | |||
| Organization | American Meteorological Society (AMS) | |||
| History (UTC) | 2005-10-13 18:20:51 :: anitadru@model.iag.usp.br -> adm_conf :: 2005-12-12 17:38:58 :: adm_conf -> anitadru@model.iag.usp.br :: 2006-03-17 16:39:23 :: anitadru@model.iag.usp.br -> administrator :: 2006-04-18 20:51:45 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:17 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:55:01 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:05:37 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:50:53 :: administrator -> banon :: 2006 2011-01-02 17:14:36 :: banon -> administrator :: 2006 2018-06-05 03:42:37 :: administrator -> :: 2006 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Keywords | South American monsoon system South Indian South Pacific REOF GCM | |||
| Abstract | This work investigates the impact of three different low-frequency Sea Surface Temperature (SST) variability modes located in the Indian and the Pacific oceans over the interannual variability of the South American Monsoon System (SAMS) using observed and numerical simulation analysis. The low-frequency variability of the SAMS is characterized by a meridional seesaw of dry and wet conditions over tropical and subtropical South America associated to the modulation of the South Atlantic Convergence Zone (SACZ). Rotated Empirical Orthogonal Function (REOF) analysis was applied over the normalized Summer (December, January and February) Reynolds SST anomalies observed during the period 1950-2001 in the South Pacific+Equatorial Pacific (SEP) and in the Indian (IN) oceans. For each region, the modes obtained via EOF were rotated using Varimax and the rotated modes were examined through composites of extremes events selected by applying a threshold of one standard deviation over their normalized Principal Component time series (CP). For the numerical simulations the Community Climate Model version 3.6 (CCM3.6) General Circulation Model (MCG) was used. The model was forced with the positive phase of the selected SST modes, considered as SST anomalies, through an ensemble technique with five integrations. The simulations were run from September/year 0 to March/year 1 and the SST anomalies are kept fixed during the integration, while the monthly SST climatology varies outside. For the IN, the second mode explains 12% of the total variance and it is localized around 25ºS;80ºE. According to the composites, warmer waters over this region are associated with enhanced austral summer precipitation over subtropics. The GCM is able to reproduce this anomalous precipitation pattern, simulating a wave train emanating from the IN towards the SA. The second SEP mode (explaining 12,4% of the total variance) consists of a region extending from the subtropical southwestern Pacific towards the Indonesia, where the maximum loading is located. REOF analysis indicates that warmer waters over this region are associated with drought conditions over the SACZ and enhanced precipitation over the subtropics. There is a wave train emanating from Indonesia towards the SA via the tropics and another weaker one via the subtropics. The MCG indicates that the warmer waters over the Indonesia generate drought conditions over the tropical SA through a PSA-like wave pattern emanating from the western Pacific. Finally, the sixth SEP mode explains 6% of the total variance and it consists in a region located over the Southwestern Pacific reaching the maximum value near to the New Zealand. The composites indicate that warmer waters over this region are associated with enhanced precipitation over the SACZ and drought conditions over the subtropics. There is a PSA-like wave train emanating from the Indonesia towards SA and another one crossing the Southern Hemisphere in the extratropics probably associated with the transients activity. The GCM is able to reproduce the anomalous precipitation pattern, although weaker. The PSA-like pattern is simulated, but the model fails in reproducing the extratropical wave activity. | |||
| Area | MET | |||
| Type | Monsoon systems and continental rainfall | |||
| doc Directory Content | access | |||
| source Directory Content |
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| agreement Directory Content | there are no files | |||
| 4. Conditions of access and use | ||||
| data URL | http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.13.18.20 | |||
| zipped data URL | http://urlib.net/zip/cptec.inpe.br/adm_conf/2005/10.13.18.20 | |||
| Language | en | |||
| Target File | 1021-1024.pdf | |||
| User Group | anitadru@model.iag.usp.br administrator | |||
| Visibility | shown | |||
| 5. Allied materials | ||||
| Host Collection | cptec.inpe.br/nobre/2005/06.02.21.14 cptec.inpe.br/walmeida/2003/04.25.17.12 | |||
| 6. Notes | ||||
| Mark | 1 | |||
| Empty Fields | archivingpolicy archivist callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination documentstage doi edition group identifier isbn issn label lineage mirrorrepository nextedition nexthigherunit notes numberofvolumes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark serieseditor session shorttitle sponsor subject tertiarymark url versiontype volume | |||