Sökning: "Pliocene"

Visar resultat 1 - 5 av 13 uppsatser innehållade ordet Pliocene.

1. 1. Understanding the impact of the superplume in Eastern Africa during the Miocene on regional climate in EC-Earth simulations.

   Kandidat-uppsats, Stockholms universitet/Institutionen för naturgeografi

   Författare :Eduardo Toledo Romero; [2020]
   Nyckelord :;

   Sammanfattning : This project attempts to gather more information to link the rise in the topography during the Miocene in Eastern Africa with climate changes that lead to the aridification of the area and ultimately to the split between chimpanzees and hominids. The candidate analysed a series of sensitivity experiments simulated with a climate model EC-Earth by changing the topography in Easter Africa and comparing with control run (pre-industrial-era) to assess the impact of the changes in the superplume in Africa and consequent topography on the climate and environment. LÄS MER

3. 2. Relating early Human evolution to late Miocene - early Pliocene climate change

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Tika van Galen; [2020]
   Nyckelord :climate; evolution; climate change; hominins; bipedal locomotion; late Miocene; Pliocene;

   Sammanfattning : Human evolution has been linked to climate change multiple times in the literature. One of the more well-known theories is the ‘savannah’ theory, which states that walking upright became an advantageous character when climate in Africa changed causing drier environments, changing woodlands to savannahs. LÄS MER

4. 3. Cell Size Variation in Fossil Coccolithophores (Haptophyta) : A Study of Pliocene Sediments from Northwestern Australia

   Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Nicole Eliassen; [2018]
   Nyckelord :Coccolithophore; cell; carbon cycle; Australia; palaeobiology; climate change.; Fästalger Haptophyta ; kokkolitoforider; Pliocen; cell; kolcykel; Australien; paleobiologi; klimatförändring;

   Sammanfattning : This report examines the size variations of fossil carbonate-producing haptophyte microalgae, coccolithophores, using sediments deposited during the Pliocene. The sediments were collected by the International Ocean Discovery Program (IODP) in 2015, off the coast of NW Australia (Gallagher et al., 2017). LÄS MER

5. 4. Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery

   Master-uppsats,

   Författare :Taisiya Dymova; [2018]
   Nyckelord :;

   Sammanfattning : Paleoglaciological reconstructions based on glacial geological and geomorphological traces are used to test and constrain numerical models of ice sheet extent and dynamics. MAGIC-DML (“Mapping, Measuring and Modelling Antarctic Geomorphology and Ice Change in Dronning Maud Land”) project is trying to reconstruct the timing and pattern of ice surface elevation changes since the mid-Pliocene across western Dronning Maud Land, East Antarctica. LÄS MER

7. 5. Investigation into the Loess-Palaeosol and Red Clay Record from the Pliocene- Quaternary Chinese Loess Plateau Using In-Phase and Out-OfPhase Magnetic Susceptibility

   Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Rebecca Jacobson; [2018]
   Nyckelord :loess; Chinese Loess Plateau; magnetic susceptibility; out-of-phase; viscous relaxation; lössjord; Kinesiska Lössjordsplatån; magnetiska känsligheter; ur-fas; viskös relaxation;

   Sammanfattning : Loess is a well sorted, fine grained, windblown (aeolian) sediment and deposits as a blanket over large areas, reaching from a few centimetres to several hundreds of meters in height and can drape large landscapes in form of mountains. During a more humid and warmer climate, redox conditions are changed in the loess deposits, with greater seasonal moisture creating greater soil formation (pedogenesis), i. LÄS MER