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  • The Andes Cordillera. Part II: Rio Olivares Basin snow conditions (1979-2014), central Chile.

    Author(s) : Mernild, S. H.Liston, G. E.Hiemstra, C. A.Yde, J. C.McPhee, J.Malmros, J. K.

    Author Affiliation : Antarctic and Sub-Antarctic Program, Universidad de Magallanes, Punta Arenas, Magallanes, Chile.

    Author Email : sebastian.mernild@hisf.no

    Journal article : International Journal of Climatology 2017 Vol.37 No.4 pp.1699-1715 ref.many

    Abstract : Snow coversnow coverSubject Category: Miscellaneous
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    extent, duration, and propertiespropertiesSubject Category: Properties
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    were simulated (1979/1980-2013/2014) for the Rio Olivares Basin (548 km2) in central Chilean Andes, in an effort to understand conditions and trends (linear) at a basin scale. The National Aeronautics and Space Administration Modern-Era Retrospective AnalysisanalysisSubject Category: Techniques, Methodologies and Equipment
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    for ResearchresearchSubject Category: Disciplines, Occupations and Industries
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    and Applications products, together with the snow modelling software package SnowModel allowed simulations of first-order atmospheric forcings (mean annual air temperatureair temperatureSubject Category: Properties
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    (MAAT) and water-equivalent precipitationprecipitationSubject Category: ClimateclimateSubject Category: Climate Related
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    Related

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    ) and terrestrial snow features (snow cover extent, duration, snow water-equivalent depth, snow densitydensitySubject Category: Properties
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    , and runoffrunoffSubject Category: Miscellaneous
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    generated from snow melt). Simulated snow cover extent and depletiondepletionSubject Category: Miscellaneous
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    curves were verified against Moderate Resolution Imaging Spectroradiometer-derived snow cover data. For the Rio Olivares Basin, MAAT was -2.9±0.6°C with a mean 0° isotherm at 3325 m a.s.l. The greatest temporal and spatial changes in temperature over the 35-year period occurred in January and at the highest elevations, respectively. Mean annual precipitation was 1.86±0.60 m w.e., indicating an increase in precipitation of ∼0.1 m w.e. 100 m-1 increase in elevation. On average, ∼90% of the basin precipitation fell as snow, varying from 70% at ∼2600 m a.s.l., to 95% at ∼4200 m a.s.l. In 20 out of 35 years the snow cover extent went to 0% (no basin snow cover) by end-of-summer (during March), and the snow duration increased on average by ∼10 days 100 m-1 increase in elevation. Approximately 85% of the basin outlet freshwater runoff originated from snowmelt, making snowmelt a dominant contributor to water resourceswater resourcesSubject Category: Miscellaneous
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    . Snowmelt-derived basin runoff was dominated by variability in snow precipitation rather than by variability in MAAT.

    ISSN : 0899-8418

    DOI : 10.1002/joc.4828

    Record Number : 20173218179

    Publisher : Wiley

    Location of publication : Chichester

    Country of publication : UK

    Language of text : English

    Indexing terms for this abstract:

    Descriptor(s) : airairSubject Category: Miscellaneous
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    , air temperatureair temperatureSubject Category: Properties
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    , analysisanalysisSubject Category: Techniques, Methodologies and Equipment
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    , atmosphereatmosphereSubject Category: Miscellaneous
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    , climateclimateSubject Category: Climate Related
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    , computer softwarecomputer softwareSubject Category: Publications
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    , densitydensitySubject Category: Properties
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    , depletiondepletionSubject Category: Miscellaneous
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    , fresh waterfresh waterSubject Category: Miscellaneous
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    , modelsmodelsSubject Category: Techniques, Methodologies and Equipment
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    , precipitationprecipitationSubject Category: Climate Related
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    , propertiespropertiesSubject Category: Properties
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    , researchresearchSubject Category: Disciplines, Occupations and Industries
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    , runoffrunoffSubject Category: Miscellaneous
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    , snowsnowSubject Category: Climate Related
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    , snow coversnow coverSubject Category: Miscellaneous
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    , water resourceswater resourcesSubject Category: Miscellaneous
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    , weatherweatherSubject Category: Climate Related
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    Identifier(s) : computer programs, isotherms, studies

    Geographical Location(s) : ChilechileSubject Category: Geographic Entities
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    Broader term(s) : Andean Groupandean groupSubject Category: Institutions and Organisations
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    , APEC countriesapec countriesSubject Category: Institutions and Organisations
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    , Developing Countriesdeveloping countriesSubject Category: Miscellaneous
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    , Latin Americalatin americaSubject Category: Geographic Entities
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    , AmericaamericaSubject Category: Geographic Entities
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    , South Americasouth americaSubject Category: Geographic Entities
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    , Threshold Countriesthreshold countriesSubject Category: Miscellaneous
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