Daily and seasonal variation of the surface temperature lapse rate and 0 degrees C isotherm height in the western subtropical Andes
Author
dc.contributor.author
Ibañez, María
Author
dc.contributor.author
Gironás, Jorge
Author
dc.contributor.author
Oberli, Christian
Author
dc.contributor.author
Chadwick Irarrázaval, Cristián
Author
dc.contributor.author
Garreaud Salazar, René
Admission date
dc.date.accessioned
2020-10-21T19:31:19Z
Available date
dc.date.available
2020-10-21T19:31:19Z
Publication date
dc.date.issued
2020
Cita de ítem
dc.identifier.citation
Int J Climatol. 2020;1–20.
es_ES
Identifier
dc.identifier.other
10.1002/joc.6743
Identifier
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https://repositorio.uchile.cl/handle/2250/177277
Abstract
dc.description.abstract
The spatial distribution of surface air temperatures is essential for understanding and modelling high-relief environments. Good estimations of the surface temperature lapse rate (STLR) and the 0 degrees C isotherm height (H0) are fundamental for hydrological modelling in mountainous basins. Although STLR changes in space and time, it is typically assumed to be constant leading to errors in the estimation of direct-runoff volumes and flash-floods risk assessment. This paper characterizes daily and seasonal temporal variations of the in-situ STLR and H0 over the western slope of the subtropical Andes (central Chile). We use temperature data collected during 2 years every 10 min by a 16 sensors network in a small catchment with elevations ranging between 700 and 3,250 m. The catchment drains directly into Santiago, the Chilean capital with more than seven million inhabitants. Resulting values are compared against those obtained using off-site, operational data sets. Significant intra- and inter-day variations of the in-situ STLR were found, likely reflecting changes in the low-level temperature inversion during dry conditions. The annual average in-situ STLR is -5.9 degrees C/km during wet-weather conditions. Furthermore, STLR and H0 estimations using off-site gauges are extremely sensitive to the existence of gauging stations at high elevations.
es_ES
Patrocinador
dc.description.sponsorship
Fondo de Financiamiento de Centros de Investigación de Aéreas Prioritarias
15110009
15110017
15110020
Fondo de Fomento al Desarrollo Científico y Tecnológico
IT13i20015
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)
CONICYT FONDECYT
1161439