The authors wish to acknowledge Dennis Keyser for his excellent support in incorporating the SALLJEX data into the assimilation systems and the efforts of the anonymous reviewers and the associate editor who greatly helped improve the manuscript. The first author wishes to acknowledge the support of the Earth System Science Interdisciplinary Center (ESSIC) and NCEP for providing the necessary conditions to develop this study and to funding agencies from Brazil (CNPq Grant 481400/2004-04 and CAPES Grant 3219-04-6). SALLJEX was funded by NOAA/OGP, NSF (ATM0106776), and funding agencies from Brazil (FAPESP Grant 01/13816-1) and Argentina (ANPCYT 07-06671, UBA 055). This work was partially supported by the NOAA Office of Global Programs Pan American Climate Studies (PACS) under Cooperative Agreement NA17EC1483 with the University of Maryland Cooperative Institute for Climate Science (CICS).
Anderson, C. J., and R. W. Arritt, 2001: Representation of summertime low-level jets in the central United States by the NCEP–NCAR reanalysis. J. Climate, 14 , 234–247.
Berbery, E. H., and E. A. Collini, 2000: Springtime precipitation and water vapor flux over southeastern South America. Mon. Wea. Rev., 128 , 1328–1346.
Herdies, D. L., A. da Silva, M. A. F. Silva Dias, and R. Nieto Ferreira, 2002: Moisture budget of the bimodal pattern of the summer circulation over South America. J. Geophys. Res., 107 .8075, doi:10.1029/2001JD000997.
Joyce, R. J., J. E. Janowiak, P. A. Arkin, and P. Xie, 2004: CMORPH: A method that produces global precipitation estimates from passive microwave and infrared data at high spatial and temporal resolution. J. Hydrometeor., 5 , 487–503.
Kanamitsu, M., W. Ebisuzaki, J. Woollen, S-K. Yang, J. J. Hnilo, M. Fiorino, and G. L. Potter, 2002: NCEP–DOE AMIP-II Reanalysis (R-2). Bull. Amer. Meteor. Soc., 83 , 1631–1643.
Marengo, J. A., W. R. Soares, C. Saulo, and M. Nicolini, 2004: Climatology of the low-level jet east of the Andes as derived from the NCEP–NCAR reanalyses: Characteristics and temporal variability. J. Climate, 17 , 2261–2280.
Nogués-Paegle, J., and K. C. Mo, 1997: Alternating wet and dry conditions over South America during summer. Mon. Wea. Rev., 125 , 279–291.
Salio, P., M. Nicolini, and A. C. Saulo, 2002: Chaco low-level jet events characterization during the austral summer season. J. Geophys. Res., 107 .4816, doi:10.1029/2001JD001315.
Silva Dias, P. L., D. Moreira, and M. A. F. Silva Dias, 2001: Downscaling resolution and the moisture budget of the Plata basin. Proc. IX Congreso Latinoamericano e Iberico de Meteorologia y Congreso Argentino de Meteorologia, La Meteorologia y el Medio Ambiente en el Siglo XXI, Buenos Aires, Argentina, Centro Argentino de Meteorológos, CD-ROM, 8.C.27-341.
Zipser, E., P. Salio, and M. Nicolini, 2004: Mesoscale convective systems activity during SALLJEX and the relationship with SALLJ events. CLIVAR Exchanges, Vol. 9, No. 1, International CLIVAR Project Office, Southampton, United Kingdom, 14–18.