STATUS OF SALLJEX RELATED INVESTIGATIONS

THEME I: SALLJ MAIN FEATURES

I.a) Quantification of the structure and variability of the SALLJ over different spatial scales.

Structure of the LLJ and its synoptic variability as described by both SALLJEX data and estimates from operational analyses. M. Douglas, J. M. Galvez, J. F. Mejia, M. Nicolini, E. Zipser, C. Saulo and P. Salio

Case studies using SALLJEX data and mesoscale modeling tools. SALLJ driving
mechanisms. Role of SALLJ on transport processes. G. Ulke, M.Nicolini, Y. Garcia Skabar, P. Silva Dias, M. Douglas and J. F. Mejia.

Studies on LLJ events during the LBA DRY to WET and SALLJEX Brasil. J. Marengo and collaborators.

Observational and numerical case studies for different interests. M. Nicolini, P. Salio, Y. Garcia Skabar , G. Ulke, C. Saulo, L. Ferreira, J. Ruiz

I.b) Description of the spatial variability of the diurnal cycle of the lower and middle tropospheric wind field

Study of diurnal wind cycles during SALLJEX. Revision of Bonner criterion over
the SALLJEX region. M. Nicolini, J. Paegle, P. Salio.

I.c) Description of the Chaco heat low, its variability in space and time, the basic processes responsible for its maintenance and its relationship with SALLJ events.

Analysis of the Chaco heat low event between 30 Jan and 2 Feb. L. Ferreira, C. Saulo, M. Seluchi, and J. Mejia.


THEME II: SALLJ  AND RAINFALL EVENTS

II.a) Determination of wet and dry periods during the experiment and their relationship with SALLJ events.

LLJs and extreme precipitation events. H. Berbery, E. Collini, V. Silva.

Relationship between the occurrence of SALLJ and daily precipitation and temperature extreme events. O. Penalba, M. Rusticucci, L. de Benedictis.

Extreme precipitation events over Southern Brazil associated to SALLJ. T. Ambrizzi and collaborators.

Intraseasonal oscillation influence on SALLJ and related rainfall pattern. C.Vera, C. Saulo, B. Liebmann, C. Campetella, G. Kiladis, J. N. Paegle.


II.b) The relationship between mesoscale convective complexes over northern Argentina or western Paraguay and the LLJ

Diurnal cycle of MCSs over northeast Argentina and possible relationship to the
diurnal cycle of the SALLJ. Salio, Zipser and Nicolini

The relationship between extreme South American Low-Level Jet events with the formation and maintenance of mesoscale convective systems. Zipser, Salio and Nicolini

Case study of the large and intense MCS of 22-23 January, including time history of satellite IR high resolution data, surface meteorological and rainfall data, and aircraft in situ and Doppler radar data. Zipser, Salio, Nicolini, M. Douglas, B. Liebmann, C. Liu.

Feedback between convection and low level jet strength. J. Ruiz and C. Saulo.


II.c) The structure of cold frontal surges near the eastern slopes of the Andes
 
…..

II.d) The description of mesoscale wind and moisture variability over the Altiplano.

Relationship between the the low-level circulation over the Bolivian low-lands and the Altiplano rainfall. R. Garreaud, P. Aceituno.

Mesoscale rainfall variability over the Altiplano and the Titicaca Lake. M. Douglas, J. M. Galvez, J. F. Mejia, R. Orozco, C. Reyes.  


II.e) Determination of the accuracy of satellite-rainfall estimates over the region.

Statistical study of the convective intensity of MCSs over the SALLJEX area, combining "snapshots" from the Tropical Rain Measuring Mission with the more comprehensive IR database. Zipser, Salio, Nicolini, C. Liu.


THEME III: NUMERICAL MODELING

III.a) SALLJEX Modeling experiment

Summary of the experiment results. C. Saulo

III.b) Validation of numerical simulation sensitivity studies that attempt to reproduce the structure of the jet and its variability

Studies of forecast sensitivity to initial state changes using SALLJEX observations. J. Paegle, C. Saulo, L. Byerle, and J. N. Paegle.

Validation of forecast models using SALLJEX observations. J. Paegle, C. Saulo, and others.

Validation of two different versions of the ETA/CPTEC Model performance during SALLJEX. M. Seluchi, G. Meira, Chou, J. Gomes, J. Bustamante.

Model evaluation: role of initial and boundary conditions. H. Berbery, E. Collini, V. Silva.

Analysis of different case studies considering the period of the experiment and different model results. I. Cavalcanti, P. Silva Dias, M. A. Silva Dias, C. Saulo, M. Nicolini, J. Marengo.

Analysis of the LLJ structure through regional climate simulations with high space-temporal resolution. T. Ambrizzi and collaborators.

III.c) SALLJEX rainfall data comparison with numerical simulations.

Use of rainfall estimates from NOAA-P3 radar data for validation of rainfall numerical simulations. G. Raga and collaborators (planned, not started)

Local forecast of convection over northern Argentina using SALLJEX upper air data. M. Nicolini and C. Saulo.


III.d) Assimilation experiments of the SALLJEX data with global and regional analyses

Modeling experiments, using the PSAS assimilation scheme in the AGCM CPTEC/COLA, and RPSAS in the regional model.  I. Cavalcanti, J. Marengo, D. Herdies.

SALLJEX data assimilation experiments using Global and regional CPTEC Models. D. Herdies, R. Cintra, J. Aravequia.

Evaluation of the impact of enhanced NCEP analysis with SALLJEX data (through downscaling) regional short range forecast using RAMS. M. Nicolini, P. Silva Dias, M. A. Silva Dias, Y. Garcia Skabar.

Assimilation experiments with and without SALLJEX data, combined with simple breeding experiments in order to evaluate bred vectors shape. E. Kalnay and collaborators (suggested investigation).


III.e) Model improvement in the region

Impact of the Finite Volume Numerical Scheme in RAMS Simulations of the Andes LLJ. P. Silva Dias, D. Soares Moreira, S. Barros, E. Freitas.

Improvements in the RAMS data assimilation system. . P. Silva Dias, A. Gandu, D. Soares Moreira, S. Freitas.

Combined use of MM5 and ARPS models for an improvement of the convection forcing in the SALLJ region. G. Raga, D. Pozo, M. Torres Brizuela, M. Nicolini (suggested investigation).

Modeling experiments using different convection and radiation parametrization schemes, during the period of the experiment. I. Cavalcanti, S. Nilo, J. C. Chagas.
 

THEME IV: ADDITIONAL SALLJ RELATED TOPICS

Impacts of deforestation of the Amazon basin on the Amazon region on the LLJ. J. Marengo and collaborators.
 
Variability of the convective cloudiness regime over eastern South America during the austral summer semester with emphasis on SACZ and the southeastern sector of the continent. A. Diaz, P. Aceituno

Relationship between the rainfall regime in Uruguay during the summer semester and preceding precipitation in central South America. A. Diaz, R. Terra, G. Pisciottano, G. Cazes and M. Medina.

Using ECMWF and NASA scatterometer ocean surface to study the process that control seasonal, interannual and intraseasonal variations of SALLJs. R. Fu, H. Wang, T. Liu and W. Tan.

Study of the ability of the regional climate model in reproduce observational features of the moisture transport associated to the LLJ occurrence periods. T. Ambrizzi and collaborators.

LLJs and the hydrologic cycle. H. Berbery, E. Collini, V. Silva.

Mechanistic experiments to test the role of changes in the SALLJ transport in the initiation of droughts. E. Kalnay and collaborators (suggested topic)

Basic water and momentum balances for the SALLJ region with and without SALLJEX data E. Kalnay and collaborators (suggested topic).


CROSS-THEME: STATUS OF SALLJEX DATABASE:

-SALLJEX data base: José Meitín

-SALLJEX upper-air data processing at NSSL, CPTEC, UBA (is it necessary to have a presentation on this?)

-SALLJEX rainfall data processing: Compilation of activities currently being performed at UBA, CPTEC, DINAC, and NSSL.