Essays about: "LGM"

Showing result 1 - 5 of 7 essays containing the word LGM.

1. 1. Demography of Birch Populations across Scandinavia

   University essay from Uppsala universitet/Växtekologi och evolution; Uppsala universitet/Institutionen för biologisk grundutbildning

   Author : Janek Sendrowski; [2022]
   Keywords : birch; betula; pubescens; pendula; betula pubescens; betula pendula; silver birch; downy birch; demography; population structure; distribution of fitness effects; DFE; dadi; UMAP; PCA; ADMIXTURE; polyDFE; ice age; glaciation; tree; boreal forest; climate change; adaption; tetraploid; diploid-tetraploid introgression; Scandinavia; genetic cluster; pipeline; snakemake; bioinformatics; reproducible; population genetics; postglacial population expansion; demographic history; FEEMS; site-frequency spectrum; SFS; last glacial maximum; LGM; workflow; python; population expansion; population growth; EST-SFS; 0-fold degenerate; 4-fold degenerate; maximum likelihood estimation; MLE; variant call format; VCF; single-nucleotide polymorphism; SNP;

   Abstract : Boreal forests are particularly vulnerable to climate change, experiencing a much more drastic increase in temperatures and having a limited amount of more northern refugia. The trees making up these vast and important ecosystems already had to adapt previously to environmental pressures brought about by the repeated glaciations during past ice ages. READ MORE

3. 2. High Sampling Resolution Luminescence Dating of Loess in Brittany, France

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Vanda Jakabová; [2021]
   Keywords : aeolian dust; loess; luminescence; dMAR; Brittany; LGM; palaeoenvironment; eoliskt damm; loess flygmo ; luminescens; dMAR; Bretagne; LGM; paleomiljö;

   Abstract : Aeolian dust is an important but poorly understood component of the climate system, which both responds to and drives global climate. Recently, dust produced at the high latitudes is also gaining attention as a possible contributor to the atmospheric dust load. READ MORE

4. 3. Investigating the Magnetic Susceptibility of Cornish Loess as a Tool for Understanding the Palaeoclimate of SW England

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Love Tingdal; [2020]
   Keywords : loess; palaeoclimate; Lizard Peninsula; Isles of Scilly; palaeoprecipitation; magnetic susceptibility; loess; paleoklimat; Lizard-halvön; Scillyöarna; historisk årsmedelnederbörd; magnetisk susceptibilitet;

   Abstract : Loess is a silty material produced via glacial grinding and its deposition is usually associated with colder periods when there is a considerable increase in atmospheric dust transport. The magnetic susceptibility of loess-palaeosol sequences has been the subject of extensive research within palaeoclimatology as it has proven to be reliable climate proxy. READ MORE

5. 4. Vegetation responses to Late Glacial climate shifts as reflected in a high resolution pollen record from Blekinge, south-eastern Sweden, compared with responses of other climate proxies

   University essay from Lunds universitet/Geologiska institutionen

   Author : Artemis Karlatou-Charalampopoulou; [2016]
   Keywords : lake sediments; Blekinge; SE Sweden; Pleistocene-Holocene boundary; loss on ignition; pollen analysis; high time-resolution; time lags; Earth and Environmental Sciences;

   Abstract : Denna studie fokuserar på en nästan 1700 år lång sjösedimentsekvens från Hässeldala Port i centrala Blekinge, sydöstra Sverige. Den omfattar övergångsperioden mellan pleistocen och holocen, eller mer precist eventen GI-1a och GS-1 samt början av den holocena epoken i iskärnorna, vilket motsvarar de sydsvenska pollenzonerna sen allerød till tidig preboreal. READ MORE

6. 5. A pre-LGM sandur deposit at Fiskarheden, NW Dalarna : sedimentology and glaciotectonic deformation

   University essay from Lunds universitet/Geologiska institutionen

   Author : Anne-Cécile Flindt; [2016]
   Keywords : deformation; structures; sandur; glaciotectonic; glaciofluvial; fault-propagation fold; Earth and Environmental Sciences;

   Abstract : The Fiskarheden quarry, situated in NW Dalarna, central Sweden, reveal thick deposits of coarse-grained sediments of Scott type facies association; a sandur deposited in an ice-proximal proglacial environment. Preliminary OSL dating of the sandur sediments suggest that they are of a pre-Saalian age (>200 000 years). READ MORE