Sökning: "Ulla Frost"

Hittade 2 avhandlingar innehållade orden Ulla Frost.

1. 1. Förlagor och teckningsläror : ett bidrag till den svenska teckningsundervisningens historia särskilt avseende 1800-talet

   Författare :Ulla Frost; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Teckningsundervisning-- historia;

   Sammanfattning : .... LÄS MER

3. 2. Subarctic ecosystem responses to climate, catchment and permafrost dynamics in the Holocene

   Författare :Ulla Kokfelt; Kvartärgeologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; subarctic Sweden; palsa mire development; peat; permafrost history; carbon and nutrient cycling; lake sediments;

   Sammanfattning : This thesis assesses aspects of the wetland development, permafrost dynamics and associated changes in carbon and nutrient cycling of the Stordalen Mire in northern Sweden. Various ecological and biogeochemical analyses of one peat and two lake sediment sequences were conducted, including analyses of organic matter and carbonate content, mosses, diatoms, testate amoebae, pigments, carbon and nitrogen and their stable isotopes, near infrared spectroscopy and biogenic silica. LÄS MER