Avancerad sökning
Visar resultat 16 - 20 av 82 avhandlingar som matchar ovanstående sökkriterier.
16. Palaeoenvironmental changes in the northern boreal zone of Finland: local versus regional drivers
Sammanfattning : Multiple proxies derived from the Lake Loitsana sediment sequence (NE Finland) are employed to determine the timing of deglaciation, characterise an early Holocene proglacial lake stage and reconstruct Holocene lake development. Local-scale processes causing shifts in biological assemblages are identified and the most likely Holocene mean July air temperature (Tjul) development is assessed. LÄS MER
17. Holocene climate and environmental change in high latitudes as recorded by stable isotopes in peat deposits
Sammanfattning : In this thesis, stable carbon and oxygen isotopes in α-cellulose isolated from Sphagnum fuscum moss remains were used as climate proxies. The main focus was to implement the methods in records from high latitude peatlands in the Northern Hemisphere (west-central Canada and north-eastern European Russia), reconstruct palaeoclimate of the studied regions during the Holocene, and evaluate the compatibility of results with other proxy records, especially tree-ring isotope time-series. LÄS MER
18. The Eemian Interglacial at Sokli, northern Finland : A multi-proxy environmental and climatic reconstruction based on a 9 m long lacustrine sediment sequence
Sammanfattning : Understanding the fundamentals of the Earth’s climate system during the Quaternary Period (the past ca 2.6 million years) is of imminent interest in light of the reported recent climatic changes. LÄS MER
19. High temporal resolution reconstructions of Holocene paleomagnetic directions and intensity : an assessment of geochronology, feature reliability and environmental bias
Sammanfattning : .... LÄS MER
20. Stable oxygen and carbon isotopes in recent and subfossil littorinidae shells - a high resolution method for paleoenvironmental reconstructions
Sammanfattning : .... LÄS MER
