The South American Low Level Jet Experiment (SALLJEX) was a field experiment carried
out in western-central South America during the 2002-2003 rainy season
as part of the South American low-level jet
(SALLJ) program. The SALLJ, a component of the CLIVAR/VAMOS program, is an internationally
coordinated effort to contribute to the understanding of the role of theSALLJ in moisture and
energy exchange between the tropics and extratropics as well as related aspects of the
regional hydrology and climate variability.
The SALLJEX Field Campaign took place between November 2002 and February 2003. For this purpose
a dense raingauge network was deployed as well as a provisional upper air observation network which included 16 new pilot balloon stations
in Peru, Bolivia, Paraguay, Argentina and Brazil. Most of these upper air stations operated twice daily, and some of them were set as
provisional radiosonde sites. NOAA-P3 Airplane flights were also carried out during low level jet and other specific events during the
months of January and February 2003. A large data set was obtained from this field campaign with purposes centered
on a better understanding of the spatial and vertical structure of the low level jet and the relationship between this system and
the large mesoscale convective systems that generate during the austral summer over eastern Bolivia, Paraguay and northern Argentina.
Part of the raingauge network was installed on the Southamerican Altiplano aiming to improve the understanding of the effects
of lakes and dry salt lakes ("salares" or "playas") on the spatial and temporal distribution of rainfall on their surrounding
areas. In order to complement these studies, two field experiments were carried out in the region: The Salar de Uyuni
Field Experiment (Late November 2002) and the Lake Titicaca Field Experiment (Early January 2003). These experiments included
the deployment of dense upper air observation networks around Salar de Uyuni and Lake Titicaca respectively, the ones
that operated during periods between 5 and 7 days.
Feel free to access SALLJEX products through the following links.