Sökning: "paleoclimate"
Visar resultat 16 - 20 av 24 avhandlingar innehållade ordet paleoclimate.
16. Speleothems from Warm Climates : Holocene Records from the Caribbean and Mediterranean Regions
Sammanfattning : This thesis contributes to increased knowledge on Holocene climate and environmental variability from two complex and sparsely studied areas. Using a speleothem from Gasparee Cave, Trinidad, as a paleoclimate archive, the local expression of the 8. LÄS MER
17. Reconstruction of the Southeast Asian hydro-climate using biomarkers and their hydrogen isotopic composition
Sammanfattning : Southeast Asia is characterized by a monsoonal climate, with distinct wet and dry seasons. This has great impact on societies, agriculture and infrastructures. LÄS MER
18. Provenance of the pre-Quaternary aeolian dust deposits of East Asia
Sammanfattning : Atmospheric mineral dust is a key component in the climate system, but its effect on and response to climate changes are poorly understood, especially over long timescales. This thesis investigates the sources of late Paleogene and Neogene dust deposits that formed under warmer-than-present global climates in the northern Chinese Loess Plateau (CLP) region in mid-latitude East Asia. LÄS MER
19. Paleoglaciology of the Tian Shan and Altai Mountains, Central Asia
Sammanfattning : The mountain-systems of Central Asia, act as barriers to atmospheric circulation patterns, which in turn impose striking climate gradients across the region. Glaciers are sensitive indicators of climate change and respond to changes in climate gradients over time by advancing during cold and wet periods and receding during warm and dry periods. LÄS MER
20. Comparison of dating methods for paleoglacial reconstruction in Central Asia
Sammanfattning : Reconstruction of former Central Asian glaciers extents can provide valuable information about past atmospheric circulation variations. These extents, often marked by terminal moraines, need to be chronologically constrained. Cosmogenic nuclide exposure (CNE) dating is widely used to directly date moraines. LÄS MER