| 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/2005/10.13.20.43 | |||
| Last Update | 2006:04.16.14.22.26 (UTC) administrator | |||
| Metadata Repository | cptec.inpe.br/adm_conf/2005/10.13.20.43.02 | |||
| Metadata Last Update | 2018:06.05.03.42.37 (UTC) administrator | |||
| Citation Key | SolmanNuñeCabr:2006:PaI:Pr | |||
| Title | Regional climate change experiment over southern South America: Part I: Present climate conditions (1981-1990)  | |||
| Format | CD-ROM, On-line. | |||
| Year | 2006 | |||
| Access Date | 2024, May 03 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 1321 KiB | |||
| 2. Context | ||||
| Author | 1 Solman, Silvina 2 Nuñez, Mario 3 Cabré, María Fernanda | |||
| Affiliation | 1 Centro de Investigaciones del Mar y la Atmósfera (CIMA-CONICET/UBA) 2 Ciudad Universitaria, Pabellón II, 2do piso, 1828, Buenos Aires, Argentina (Solman 3 Nuñez 4 Cabré) | |||
| Author e-Mail Address | 1 solman@cima.fcen.uba.ar 2 mnunez@cima.fcen.uba.ar 3 cabre@cima.fcen.uba.ar | |||
| Editor | Vera, Carolina Nobre, Carlos | |||
| e-Mail Address | solman@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 | 429-439 | |||
| Book Title | Proceedings | |||
| Tertiary Type | Oral | |||
| Organization | American Meteorological Society (AMS) | |||
| History (UTC) | 2005-10-13 20:43:02 :: solman@cima.fcen.uba.ar -> adm_conf :: 2005-12-15 16:24:01 :: adm_conf -> solman@cima.fcen.uba.ar :: 2006-03-15 18:01:09 :: solman@cima.fcen.uba.ar -> administrator :: 2006-04-18 20:51:46 :: administrator -> lise@dpi.inpe.br :: 2010-12-28 12:36:17 :: lise@dpi.inpe.br -> administrator :: 2010-12-29 15:55:02 :: administrator -> lise@dpi.inpe.br :: 2006 2010-12-29 16:05:37 :: lise@dpi.inpe.br -> administrator :: 2006 2010-12-29 18:50:54 :: 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 | regional climate change present day-climate southern South America | |||
| Abstract | A basic analysis is presented for a series of regional climate change simulations over southern South America that were conducted by the Centro de Investigaciones del Mar y la Atmósfera (CIMA) as a contribution to the Argentinean 2nd National Communication of Climate Change Project. The regional model MM5/CIMA was nested within time-slice global atmospheric model experiments conducted by HadAM3 model. A 10-year control run and two 10-year scenario runs (based on the SRES A2 and B2 emission scenarios) were performed. In this paper we present the analysis of the present-day climate (1981-1990). The main focus is to evaluate the capability of the model in simulating the spatial distribution and the seasonal cycle of precipitation and surface air mean, maximum and minimum temperatures. Overall, the regional model is able to capture the main features of the observed mean surface climate over South America, its seasonal evolution and the regional detail due to topographic forcing. A comparison of seasonal average sea level pressure fields between the regional model and NCEP reanalysis show that the subtropical anticyclones over the Pacific and Atlantic Oceans are slightly shifted poleward, as in HadAM3. The meridional pressure gradient at high latitudes is overestimated with respect to NCEP reanalysis in both, the HadAM3 and the regional model, particularly in winter, being the synoptic activity more intense as well. The observed regional patterns of surface air temperatures (mean, maxima and minima) are well reproduced. Nevertheless, biases are mostly within 3°C, being overestimated over central Argentina and underestimated in mountainous regions during all seasons. Biases in northeastern Argentina and southeastern Brazil are positive during SON and negative in other seasons. In general, maximum temperatures are better represented than minimum temperatures. Nevertheless, warm bias is larger during DJF for maximum temperature and during JJA for minimum temperature, mainly over central Argentina. The broad spatial pattern of precipitation and its seasonal evolution are well captured; nevertheless, there are systematic errors in precipitation amounts, being the bias within 25 %. Particularly, the regional model overestimates the precipitation over the Andes region in all seasons and in southern Brazil during summer. Precipitation amounts are underestimated over the Paraná River basin from fall to spring. Deficiencies in the boundary conditions and surface processes may explain deficiencies in representing precipitation and surface air temperatures. For instance, more intense synoptic activity over the Pacific storm-track region can explain larger amounts of precipitation over the Andes. Moreover, warm bias over central and northern Argentina during DJF is coherent with smaller precipitation amounts, and thus, with soils too dry. Overall, though there are systematic errors in the simulated present climate conditions, we can conclude that the regional model is capable in reproducing the main regional patterns and seasonal cycle of surface variables. Nevertheless, though the length of the simulation is relatively short, it is only possible to draw conclusions about model performance with respect to mean conditions. Moreover, a single realization is not enough in order to build a complete evaluation of the simulation but it allows identifying a degree of confidence of the dynamic downscaling approach for the region. Finally, it is worth to mention that the present reference simulation constitutes the basis to examine the climate change simulations resulting from the A2 and B2 forcing scenarios which are being reported in a separate study.. | |||
| 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/2005/10.13.20.43 | |||
| zipped data URL | http://urlib.net/zip/cptec.inpe.br/adm_conf/2005/10.13.20.43 | |||
| Language | en | |||
| Target File | 429-440.pdf | |||
| User Group | solman@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 | |||