Summer precipitation variability over Southeastern South America in a global warming scenario
December-January-February (DJF) rainfall variability in southeastern South America (SESA) is studied in 18 coupled general circulation models from the WCRP/CMIP3 dataset, for present climate and the SRES-A1B climate change scenario. The analysis is made in terms of properties of the first leading pa...
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2012
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| LEADER | 12325caa a22010937a 4500 | ||
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| 003 | AR-BaUEN | ||
| 005 | 20230518203938.0 | ||
| 008 | 190411s2012 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-84860338910 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Junquas, C. | |
| 245 | 1 | 0 | |a Summer precipitation variability over Southeastern South America in a global warming scenario |
| 260 | |c 2012 | ||
| 270 | 1 | 0 | |m Junquas, C.; Centro de Investigaciones del Mar y la Atmósfera (CIMA), DCAO/FCEyN, UMI-IFAECI CNRS-CONICET-UBA, Buenos Aires, Argentina; email: junquas@cima.fcen.uba.ar |
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| 520 | 3 | |a December-January-February (DJF) rainfall variability in southeastern South America (SESA) is studied in 18 coupled general circulation models from the WCRP/CMIP3 dataset, for present climate and the SRES-A1B climate change scenario. The analysis is made in terms of properties of the first leading pattern of rainfall variability in the region, characterized by a dipole-like structure with centers of action in the SESA and South Atlantic Convergence Zone (SACZ) regions. The study was performed to address two issues: how rainfall variability in SESA would change in a future climate and how much of that change explains the projected increasing trends in the summer mean rainfall in SESA identified in previous works. Positive (negative) dipole events were identified as those DJF seasons with above (below) normal rainfall in SESA and below (above) normal rainfall in the SACZ region. Results obtained from the multi-model ensemble confirm that future rainfall variability in SESA has a strong projection on the changes of seasonal dipole pattern activity, associated with an increase of the frequency of the positive phase. In addition, the frequency increase of positive dipole phase in the twenty first century seems to be associated with an increase of both frequency and intensity of positive SST anomalies in the equatorial Pacific, and with a Rossby wave train-like anomaly pattern linking that ocean basin to South America, which regionally induces favorable conditions for moisture transport convergence and rainfall increase in SESA. © 2011 Springer-Verlag. |l eng | |
| 593 | |a Laboratoire de Météorologie Dynamique, Institut Pierre Simon Laplace, Ecole Polytechnique, UPMC/CNRS, Paris, France | ||
| 593 | |a Centro de Investigaciones del Mar y la Atmósfera (CIMA), DCAO/FCEyN, UMI-IFAECI CNRS-CONICET-UBA, Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a CLIMATE CHANGE |
| 690 | 1 | 0 | |a ENSO |
| 690 | 1 | 0 | |a RAINFALL VARIABILITY |
| 690 | 1 | 0 | |a WCRP-CMIP3 MULTI-MODEL DATASET |
| 690 | 1 | 0 | |a CLIMATE CHANGE |
| 690 | 1 | 0 | |a CONVERGENCE |
| 690 | 1 | 0 | |a EL NINO-SOUTHERN OSCILLATION |
| 690 | 1 | 0 | |a GENERAL CIRCULATION MODEL |
| 690 | 1 | 0 | |a GLOBAL WARMING |
| 690 | 1 | 0 | |a MOISTURE TRANSFER |
| 690 | 1 | 0 | |a PRECIPITATION (CLIMATOLOGY) |
| 690 | 1 | 0 | |a RAINFALL |
| 690 | 1 | 0 | |a ROSSBY WAVE |
| 690 | 1 | 0 | |a SEA SURFACE TEMPERATURE |
| 690 | 1 | 0 | |a SUMMER |
| 690 | 1 | 0 | |a TEMPERATURE ANOMALY |
| 690 | 1 | 0 | |a TEMPORAL VARIATION |
| 690 | 1 | 0 | |a PACIFIC OCEAN |
| 690 | 1 | 0 | |a PACIFIC OCEAN (EQUATORIAL) |
| 651 | 4 | |a SOUTH AMERICA CLIMATE | |
| 651 | 4 | |a SOUTH AMERICA | |
| 700 | 1 | |a Vera, C. | |
| 700 | 1 | |a Li, L. | |
| 700 | 1 | |a Le Treut, H. | |
| 773 | 0 | |d 2012 |g v. 38 |h pp. 1867-1883 |k n. 9-10 |p Clim. Dyn. |x 09307575 |w (AR-BaUEN)CENRE-567 |t Climate Dynamics | |
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