Estimation of integrated water vapor derived from Global Navigation Satellite System observations over Central-Western Argentina (2015–2018). Validation and usefulness for the understanding of regional precipitation events
Date
2019-10-07Author
Camisay, María Fernanda
Rivera, Juan Antonio
Mateo, María Laura
Mackern, María Virginia
Morichetti, Paola
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ARTÍCULO PUBLICADO EN REVISTA EXTERNA. This study assesses the possibility of using Global Navigation Satellite System (GNSS) observations in combination
with measurements of surface pressure and temperature to derive Integrated Water Vapor (IWVGNSS)
estimates in Central-Western Argentina (CWA), a semi-arid region with complex topography. A significant
agreement (coefficient of determination > 0.9) is observed between IWVGNSS and IWV estimates from radiosonde
measurements, highlighting the capability of the GNSS stations to provide IWVGNSS estimates for a denser
network. The variability of the IWV estimates, the atmospheric pressure and precipitation totals for a case study
are compared. The results show that the occurrence of the increase in IWV values (positive IWV anomalies)
precedes abundant precipitation over the CWA, in conjunction with the presence of mid-troposphere low-pressure
anomalies acting as synoptic forcing. This kind of information provides a more comprehensive picture about
the atmospheric processes involved in the development of deep convection, and it can be used for the development
of contingency plans in the region. Heavy precipitation events and the difference in timing between
positive IWV anomalies, both on-site and for their surroundings, should be considered. Fil: Camisay, María Fernanda. Universidad Juan Agustín Maza. Facultad de Ingeniería. Mendoza. República Argentina. Fil: Rivera, Juan Antonio. Universidad Juan Agustín Maza. Facultad de Ciencias Veterinarias y Ambientales; Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Mendoza, República Argentina. Fil: Mateo, María Laura. Universidad Juan Agustín Maza. Facultad de Ingeniería; Universidad Nacional de Cuyo. Facultad de Ingeniería. Mendoza. República Argentina. Fil: Morichetti, Paola. Universidad Juan Agustín Maza. Facultad de Ingeniería. Mendoza. República Argentina. Fil: Mackern, María Virginia. Universidad Juan Agustín Maza. Facultad de Ingeniería; Universidad Nacional de Cuyo. Facultad de Ingeniería; Consejo Nacional de Investigaciones Científicas y Técnicas. Mendoza, República Argentina.