| 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/2005/10.14.09.47 | |||
| Last Update | 2006:04.16.14.54.42 (UTC) administrator | |||
| Metadata Repository | cptec.inpe.br/adm_conf/2005/10.14.09.47.16 | |||
| Metadata Last Update | 2018:06.05.03.42.38 (UTC) administrator | |||
| Citation Key | ColbergReas:2006:OcMoDi | |||
| Title | Ocean Model Diagnosis of Low Frequency Climate Variability in the South Atlantic  | |||
| Format | CD-ROM, On-line. | |||
| Year | 2006 | |||
| Access Date | 2024, Dec. 26 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 393 KiB | |||
| 2. Context | ||||
| Author | 1 Colberg, F. 2 Reason, C. J. C. | |||
| Affiliation | 1 Department of Oceanography 2 University of Cape Town 3 Private Bag X3 4 Rondebosch, 7701 5 South Africa | |||
| Author e-Mail Address | 1 colberg@ocean.uct.ac.za 2 cjr@egs.uct.ac.za | |||
| Editor | Vera, Carolina Nobre, Carlos | |||
| e-Mail Address | colberg@ocean.uct.ac.za | |||
| 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 | 1509-1512 | |||
| Book Title | Proceedings | |||
| Tertiary Type | Oral | |||
| Organization | American Meteorological Society (AMS) | |||
| History (UTC) | 2005-10-14 09:47:16 :: colberg@ocean.uct.ac.za -> administrator :: 2005-11-11 19:19:02 :: administrator -> adm_conf :: 2005-12-16 01:24:19 :: adm_conf -> colberg@ocean.uct.ac.za :: 2006-03-27 16:07:18 :: colberg@ocean.uct.ac.za -> administrator :: 2006-04-18 20:52:23 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:18 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:55:08 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:05:38 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:51:01 :: administrator -> banon :: 2006 2011-01-02 17:14:37 :: banon -> administrator :: 2006 2018-06-05 03:42:38 :: administrator -> :: 2006 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Keywords | coupled ocean atmosphere modelling low frequence variability | |||
| Abstract | South Atlantic Ocean variability is investigated by means of an ocean general circulation model (ORCA2), forced with the NCEP/ NCAR-reanalysis for the 1948-1999 period.A rotated EOF analysis of the mixed layer temperature suggests a breakdown of the South Atlantic into three subdomains, with characteristic spatial and temporal scales: (a) the tropical Atlantic, with mainly interannual fluctuations, (b) the subtropics, with variability on an interannual to decadal scale, and (c) the midlatitudes, with interannual and multidecadal variability. These modes are closely connected to anomalous atmospheric circulation patterns, which induce typical forcing mechanisms for each region. Temperature changes in the western to central tropics are found to be driven by changes in surface heat fluxes and horizontal advection of heat, while in the central to eastern tropics and the northern Benguela, temperature changes are connected to reduced vertical entrainment, altering the depth of the mixed layer and leading to reduced upwelling. In the subtropics, changes in the net surface fluxes drive the upper ocean temperature anomalies, and wind induced vertical mixing dissipates them, inducing changes in the depth of the mixed layer. Anomalous heat and volume transports are found to be related to anomalous Ekman and geostrophic currents. A wind driven mechanism is suggested, whereby changes in Ekman related heat and volume transport lead to modulations of the subtropical gyre and thus to changes in the geostrophic related heat and volume transport. The midlatitudes experience temperature changes mainly due to horizontal advection and wind induced vertical mixing, whereby geostrophic advection of heat dominates in the western to central area, and Ekman induced heat transports are confined to the eastern midlatitudes. Results from a SVD analysis between mixed layer temperatures and sea level pressure suggests that these forcing mechanisms, their associated regions and time scales, as well as heat and volume transports are also valid for the coupled ocean-atmosphere system. end{abstract}. | |||
| Area | MET | |||
| Type | Understanding long-term climate variations in the SH | |||
| 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/2005/10.14.09.47 | |||
| zipped data URL | http://urlib.net/zip/cptec.inpe.br/adm_conf/2005/10.14.09.47 | |||
| Language | en | |||
| Target File | 1509-1512.pdf | |||
| User Group | colberg@ocean.uct.ac.za 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 | |||