Precipitation in Northern Quebec and Labrador: An Evaluation of Measurement Techniques
ABSTRACT. A testing of published maps of precipitation normals for a continen-tal subarctic area using hydrological techniques suggests a systematic annual error of 6 inches (152 mm.) The scope of the analysis is subcontinental, but point values for a central climatological station are used to eluci...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.4321 http://pubs.aina.ucalgary.ca/arctic/Arctic22-2-140.pdf |
| Summary: | ABSTRACT. A testing of published maps of precipitation normals for a continen-tal subarctic area using hydrological techniques suggests a systematic annual error of 6 inches (152 mm.) The scope of the analysis is subcontinental, but point values for a central climatological station are used to elucidate indirect techniques avail-able for the adjustment of precipitation gauge data. These methods include snow surveying, stream gauging, interception and evapotranspiration calculations and watershed rain gauge networks. All hydrological parameters are characterized by inherent errors in measurement and short periods of record. Consequently, the results of this investigation should be considered speculative. RESUME,. Les prkipitations duns le nord du QuCbec et au Labrador: Cvaluation des techniques de mesure. La vkrification, au moyen de techniques hydrologiques, des cartes publikes de hauteur moyenne des pricipitations pour une region conti-nentale subarctique revble une erreur annuelle systimatique de 6 pouces (152 mm). L'analyse a une portke subcontinentale, mais on utilise les valeurs d'une station cli-matologique centrale pour kclairer les techniques indirectes servant au rajustement des donnies pluviomktriques. Ces mkthodes comprennent les mesures d'kpaisseur du manteau nival et des debits fluviaux, le calcul de l'interception et de l'evapo-transpiration, et l'ktablissement de reseaux pluviomktriques de bassin. Tous les parambtres hydrologiques se caracterisent par des erreurs inhirentes de mesure et par de courtes series de donnees. Consequemment, les rksultats de cette enqu6te doivent h r e considkrks comme speculatifs. |
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