| 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/2005/10.31.19.28 | |||
| Last Update | 2006:04.15.22.55.50 (UTC) administrator | |||
| Metadata Repository | cptec.inpe.br/adm_conf/2005/10.31.19.28.31 | |||
| Metadata Last Update | 2018:06.05.03.42.58 (UTC) administrator | |||
| Citation Key | GonzálezVeraLieb:2006:ChInVa | |||
| Title | Characteristics of the intraseasonal variability of precipitation over eastern Argentina  | |||
| Format | CD-ROM, On-line. | |||
| Year | 2006 | |||
| Access Date | 2024, Dec. 26 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 1615 KiB | |||
| 2. Context | ||||
| Author | 1 González, Paula L. M. 2 Vera, Carolina S. 3 Liebmann, Brant | |||
| Affiliation | 1 CIMA/DCAO, University of Buenos Aires-CONICET (González 2 Vera) 3 NOAA/CIRES Climate Diagnostics Center, Boulder, Colorado, USA (Liebmann) | |||
| Author e-Mail Address | 1 pgonzalez@cima.fcen.uba.ar 2 carolina@cima.fcen.uba.ar 3 brant.liebmann@noaa.gov | |||
| Editor | Vera, Carolina Nobre, Carlos | |||
| e-Mail Address | pgonzalez@cima.fcen.uba.ar | |||
| 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 | 1063-1088 | |||
| Book Title | Proceedings | |||
| Tertiary Type | Poster | |||
| Organization | American Meteorological Society (AMS) | |||
| History (UTC) | 2005-10-31 19:28:31 :: pgonzalez@cima.fcen.uba.ar -> adm_conf :: 2005-12-12 17:39:08 :: adm_conf -> pgonzalez@cima.fcen.uba.ar :: 2006-03-30 17:19:00 :: pgonzalez@cima.fcen.uba.ar -> administrator :: 2006-04-18 21:12:09 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:41 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:58:04 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:06:05 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:53:49 :: administrator -> banon :: 2006 2011-01-02 17:15:05 :: banon -> administrator :: 2006 2018-06-05 03:42:58 :: administrator -> :: 2006 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Keywords | intraseasonal variability precipitation SACZ | |||
| Abstract | An analysis of the intraseasonal variability of precipitation over central and eastern Argentina is presented. Daily precipitation data from Argentinean Weather Service stations that are representative of the different geographical regions have been used for the period 1976-2001. The climatological mean seasonal cycle was first removed from the timeseries. In order to retain the intraseasonal variability associated with the warm season (1 Nov-31 Mar), the anomaly timeseries were normalized and filtered by a 20-90 day Lanczos filter. Daily OLR data for the period 1979-2001 have also been used to compare its associated intraseasonal variability with that depicted by the precipitation data. Results show that intraseasonal variability observed in the daily precipitation over central and eastern Argentina explains a significant portion of the total summer variance. Moreover, the explained variance by the intraseasonal variability is largest over eastern Argentina, decreasing from subtropical to middle latitudes. OLR, typically used as summer precipitation proxy, is able to reproduce the basic characteristic of the precipitation intraseasonal variability, particularly when the amplitude of the intraseasonal oscillations (IO) in precipitation timeseries is relatively large. Although, when the IO amplitude is small, OLR variability only explains a small fraction of the precipitation variability. Furthermore, the OLR is not able to represent the precipitation variability on synoptic timescales. Positive (negative) events of precipitation intraseasonal variability were defined identifying the dates in which the filtered precipitation series exhibit values above (below) one standard deviation for at least 5 days. Around 50 events were identified for each category over the period considered, with around half of them exhibiting a mean length of 7 days and the others of 12 days. The date associated with the maximum (minimum) filtered precipitation value was identified for each positive (negative) event and was then considered as Day 0 in the computation of daily composites. Composite 200-hPa geopotential-height anomalies for positive precipitation events over subtropical eastern Argentina show a wave train evolving all along the South Pacific, over the 10-day period previous to the precipitation peak. The wave train is characterized by quasistationary anomaly centers and a relatively fast eastward wave energy progression. On the other hand, composites for positive precipitation events over extratropical eastern Argentina are associated with the evolution of long-life synoptic waves progressing eastward. Composites of OLR anomalies for positive precipitation events over both subtropical and extratropical eastern Argentina are associated with decreased convection in the SACZ region, in agreement with previous works. Nevertheless, differences in the location and timing of the OLR positive anomalies over the SACZ region were observed for both types of composites and will be further discussed in the Conference. | |||
| 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/2005/10.31.19.28 | |||
| zipped data URL | http://urlib.net/zip/cptec.inpe.br/adm_conf/2005/10.31.19.28 | |||
| Language | en | |||
| Target File | 1063-1088.pdf | |||
| User Group | pgonzalez@cima.fcen.uba.ar 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 | |||