| 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/2005/10.21.01.48 | |||
| Last Update | 2006:04.16.19.11.12 (UTC) administrator | |||
| Metadata Repository | cptec.inpe.br/adm_conf/2005/10.21.01.48.59 | |||
| Metadata Last Update | 2018:06.05.03.42.41 (UTC) administrator | |||
| Citation Key | MeneghiniSimmSmit:2006:AsSeAu | |||
| Title | Association between seasonal Australian rainfall and the Southern Annular Mode  | |||
| Format | CD-ROM, On-line. | |||
| Year | 2006 | |||
| Access Date | 2024, Dec. 26 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 781 KiB | |||
| 2. Context | ||||
| Author | 1 Meneghini, Belinda 2 Simmonds, Ian 3 Smith, Ian | |||
| Affiliation | 1 The University of Melbourne, School of Earth Sciences, Parkville 3010, Victoria, Australia (Meneghini 2 Simmonds) 3 Commonwealth Scientific and Industrial Research Organisation (CSIRO), Marine and Atmospheric Research, Aspendale 3195, Victoria, Australia (Smith) | |||
| Author e-Mail Address | 1 b.meneghini@pgrad.unimelb.edu.au 2 simmonds@unimelb.edu.au 3 Ian.Smith@csiro.au | |||
| Editor | Vera, Carolina Nobre, Carlos | |||
| e-Mail Address | b.meneghini@pgrad.unimelb.edu.au | |||
| 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 | 311-313 | |||
| Book Title | Proceedings | |||
| Tertiary Type | Oral | |||
| Organization | American Meteorological Society (AMS) | |||
| History (UTC) | 2005-10-21 01:48:59 :: b.meneghini@pgrad.unimelb.edu.au -> adm_conf :: 2005-12-16 02:54:32 :: adm_conf -> b.meneghini@pgrad.unimelb.edu.au :: 2006-03-09 03:03:40 :: b.meneghini@pgrad.unimelb.edu.au -> administrator :: 2006-04-18 20:55:19 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:21 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:55:33 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:05:42 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:51:23 :: administrator -> banon :: 2006 2011-01-02 17:14:41 :: banon -> administrator :: 2006 2018-06-05 03:42:41 :: administrator -> :: 2006 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Keywords | Southern Annular Mode Australian rainfall climate change El Nino-Southern Oscillation Southern Hemisphere variability | |||
| Abstract | The Southern Annular Mode (SAM) is the leading mode of variability in Southern Hemisphere extratropical circulation, and there is known to be an association between the SAM and synoptic activity. Previous studies have investigated the relationship between seasonal rainfall and the SAM in southwest Western Australia, southeast South America and western South Africa. In this study we explore the relationships between seasonal Australian rainfall and the SAM. As there has been a positive trend in the SAM over the past few decades, it may provide an explanation for the significant decreases in winter rainfall observed in parts of southern Australia. Naturally, as El Niño-Southern Oscillation (ENSO) has a large influence on seasonal Australian rainfall we would want to compare any SAM-rainfall relationship to the ENSO-rainfall relationship. In this study we use a high-quality dataset in the ERA40 mean sea level pressure reanalysis to construct a SAM index according to the definition of Gong and Wang. Australian monthly gridded rainfall data and the Southern Oscillation Index are obtained from the Australian Bureau of Meteorology. We use correlations to explore the relationships between Australian rainfall and the SAM, and perform correlations using raw and detrended data so as to observe the relationships on interannual to long-term and interannual to interdecadal timescales, respectively. For the period examined, 1958-2002, there is much seasonality in the SAM-rainfall relationship, with the most widespread statistically significant correlations (at the 95% confidence level) being observed in summer and winter. Generally, in-phase relationships are found in the northern half of Australia, while inverse relationships are found in the southern half of Australia. We can attribute most of the significant correlations to the SAM affecting anticyclones, extratropical cyclones and cold fronts, and the zonal wind and temperature in the Australian region. However, due to a lack of widespread significant correlations in northern Australia it appears that the SAM does not have a great influence on the Australian monsoon and tropical cyclones in the region. Correlations performed using raw and detrended data are generally very similar, indicating that the SAM-rainfall relationships observed are due to the relationships on interannual to interdecadal timescales, but also that the SAM-rainfall relationships are mostly genuine and are not due to trends in either of the time series. Compared to the SAM-rainfall relationships, we find that ENSO accounts for more of the seasonal rainfall variability than the SAM does across most of the continent and seasons. Although the SAM plays a bigger role in seasonal rainfall variability than ENSO does in parts of western and southern Australia in summer and winter. Our results suggest that the SAM can partly explain the trends in winter rainfall in parts of southern Australia, contributing to as much as 25% of the decrease in the far southwest, and 36% of the decrease in the southeast.. | |||
| Area | MET | |||
| Type | Climate change 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/2005/10.21.01.48 | |||
| zipped data URL | http://urlib.net/zip/cptec.inpe.br/adm_conf/2005/10.21.01.48 | |||
| Language | en | |||
| Target File | 311-314.pdf | |||
| User Group | b.meneghini@pgrad.unimelb.edu.au 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 | |||