Sökning: "seasonal variation"

Visar resultat 1 - 5 av 211 avhandlingar innehållade orden seasonal variation.

  1. 1. Seasonal variation and landscape regulation of dissolved organic carbon concentrations and character in Swedish boreal streams

    Författare :Anneli Ågren; Mats Jansson; Irena Creed; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; DOC; temporal variation; spatial variation; seasonal variation; forested catchment; wetland catchment; catchment characteristics; DOC characteristics; absorbance-ratio; bioavailability.; Physical geography; Naturgeografi;

    Sammanfattning : The seasonal variation and landscape regulation of dissolved organic carbon (DOC) concentrations in streams have been studied in two watersheds in the boreal zone. The seasonal variation was found to be highly correlated to variations in runoff. An increase in runoff was always accompanied with an increase in DOC concentration. LÄS MER

  2. 2. Seasonal variation of road runoff in cold climate

    Författare :Camilla Westerlund; Luleå tekniska universitet; []

    Sammanfattning : The main objective of this thesis was to characterize and study the behaviour and transport of pollutants, i.e., suspended solids, particles and heavy metals, in road runoff from a small urban catchment during snowmelt and rainfall. LÄS MER

  3. 3. Spring Phenology of Butterflies : The role of seasonal variation in life-cycle regulation

    Författare :Sandra Stålhandske; Olof Leimar; Karl Gotthard; Wolf Blanckenhorn; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Phenology; Life cycle regulation; Phenotypic plasticity; Local adaptation; Butterflies; Diapause; Pupal development; Anthocharis cardamines; Herbivore – host plant interaction; etologi; Ethology;

    Sammanfattning : Animals and plants in temperate regions must adapt their life cycle to pronounced seasonal variation. The research effort that has gone into studying these cyclical life history events, or phenological traits, has increased greatly in recent decades. LÄS MER

  4. 4. Seasonal variation in pine forest evaporation and canopy conductance

    Författare :Anders Lindroth; Uppsala universitet; []

    Sammanfattning : .... LÄS MER

  5. 5. Radar Measurements of Temporal Variation in a Boreal Forest

    Författare :Albert Monteith; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; LANTBRUKSVETENSKAPER; NATURAL SCIENCES; AGRICULTURAL SCIENCES; remote sensing; temporal variation; tomography; antenna array; temporal coherence; Synthetic aperture radar SAR ;

    Sammanfattning : Synthetic aperture radar (SAR) on a satellite platform is a suitable technique for all-weather global monitoring of forest parameters such as biomass. This is important for increasing the accuracy of the global terrestrial carbon flux, the largest uncertainty in our current understanding of the Earth’s carbon cycle. LÄS MER