Sökning: "temperature reconstruction"

Visar resultat 1 - 5 av 50 uppsatser innehållade orden temperature reconstruction.

1. 1. Loess as an Environmental Proxy for Reconstruction of Palaeoclimate in the High Arctic

   Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Sara Rognås; [2023]
   Nyckelord :aeolian transport; loess; grain size analysis; loss on ignition; palaeoclimate; Svalbard; Holocene; vindtransporterat material; lössjord; kornstorlek; loss on ignition; paleoklimat; Svalbard; Holocen;

   Sammanfattning : We are currently speeding towards significant changes in the climate of the earth which, if ignored, will lead to severely altered climatic conditions with serious consequences for several species and ecosystems. The polar regions especially are very sensitive to climate changes, and the changes these regions undergo affect the climate on a global scale. LÄS MER

3. 2. A comparison between tomographic and generated open cell metal foam structures

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära; Lunds universitet/Institutionen för byggvetenskaper

   Författare :Jonathan Ebbesson; [2023]
   Nyckelord :Technology and Engineering;

   Sammanfattning : This master thesis project presents steps on the image processing and reconstruction of an aluminium open-cell metal foam from $\mu$CT tomographic data. In addition, it also considers the generation of architecture foams using Voronoi Tessellation in combination with sphere packing algorithms. LÄS MER

4. 3. CLIMATE CHANGE AND THE NORWAY SPRUCE TREELINE IN THE CENTRAL SCANDINAVIAN MOUNTAINS Treeline evolution, tree growth and a Blue Intensity summer temperature reconstruction

   Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

   Författare :Fredrik Karlsson; [2022-09-01]
   Nyckelord :Treeline evolution; Tree growth; Norway spruce; central Scandinavian mountains; Blue Intensity;

   Sammanfattning : In the context of global change, mountain regions have received increased interest in recent times with researchers trying to answer how such regions may be affected by a changing climate. Treeline environments are sensitive to the impacts of climate change which may significantly alter the characteristics of the regions. LÄS MER

5. 4. The Magnetic Properties and Fabrics of Upper Pleistocene Loess on La Motte, Jersey, and their Palaeoclimate Implications

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Anya Hawkins; [2022]
   Nyckelord :last glacial; magnetic susceptibility; AMS; temperature dependent magnetic susceptibility; palaeowind reconstruction;

   Sammanfattning : The island of Jersey is an interesting location for palaeoclimate reconstruction given the likely impact of variations in North Atlantic climate and European ice sheet extent during the last glacial period considering their proximal location. These last glacial climatic variations are recorded in the loess sequence from La Motte, Jersey and in order to reconstruct these changes, a detailed magnetic analysis was performed. LÄS MER

7. 5. Elemental variability in tree-rings as indicator for climate change : a case study on beech and oak trees at the Laacher See, Germany

   Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

   Författare :Ann-Kathrin Wild; [2022]
   Nyckelord :trace elements; tree-rings; dendrochemistry; dendroclimatology; ITRAX; Laacher See; mofettes; tree-bark; Quercus sp.; Fagus sp.;

   Sammanfattning : The aim of this study was to contribute to the comprehension of the connection of element uptake in trees at the Laacher See in Germany and climatic parameters on different time scales. Understanding the relationship of certain elements in trees and temperature might enable the assignment of extraordinary high peaks in the elemental concentration, which cannot be explained by temperature, to another process as CO2 degassing of the mofettes, which are relics of the volcanic past of the lake. LÄS MER