Sökning: "δ13C"

Visar resultat 1 - 5 av 12 avhandlingar innehållade ordet δ13C.

  1. 1. Varved lake sediments and diagenetic processes

    Detta är en avhandling från Umeå : Ekologi, miljö och geovetenskap

    Författare :Veronika Gälman; Ingemar Renberg; Daniel Conley; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Varved annually laminated lake sediment; diagenesis; varve appearance; iron; sulfur; chemical speciation; iron cycling; carbon; nitrogen; stabile isotopes; δ13C; δ15N; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Sammanfattning : Varved (annually laminated) sediments are of great interest for inference of past environmental conditions, as they provide dated records with high time resolution. After deposition, the sediment varves are affected by diagenesis; i.e., chemical, physical and biological changes that occur within the sediment. LÄS MER

  2. 2. Consuming and communicating identities Dietary diversity and interaction in Middle Neolithic Sweden

    Detta är en avhandling från Stockholm : Department of Archaeology and Classical Studies, Stockholm University

    Författare :Elin Fornander; Kerstin Lidén; Per Andersson; Liv Nilsson Stutz; [2011]
    Nyckelord :HUMANIORA; HUMANITIES; Middle Neolithic; Neolithisation; Sweden; Baltic Sea; Funnel Beaker Culture; Pitted Ware Culture; Battle Axe Culture; megaliths; isotopes; δ13C; δ15N; δ34S; 87Sr 86Sr; radiocarbon dating; palaeodiet; mobility; interaction; identity; ethnicity; HUMANITIES and RELIGION History and philosophy subjects Archaeology subjects Archaeology; HUMANIORA och RELIGIONSVETENSKAP Historisk-filosofiska ämnen Arkeologiämnen Arkeologi; Archaeological Science; laborativ arkeologi;

    Sammanfattning : Isotope analyses on human and faunal skeletal remains from different Swedish Neolithic archaeological contexts are here applied as a means to reconstruct dietary strategies and mobility patterns. The chronological emphasis is on the Middle Neolithic period, and radiocarbon dating constitutes another central focus. LÄS MER

  3. 3. Migration in Prehistory : DNA and stable isotope analyses of Swedish skeletal material

    Detta är en avhandling från Stockholm : Institutionen för arkeologi och antikens kultur

    Författare :Anna Linderholm; Kerstin Lidén; Oliver Craig; [2008]
    Nyckelord :HUMANIORA; HUMANITIES; Migration; ancient DNA; stable isotopes; δ13C; δ15N; δ34S; mtDNA; lactose tolerance; Neolithic; Pitted Ware culture; Funnel Beaker culture; Vikings; Öland; Rössberga; Birka; Björned; HUMANITIES and RELIGION History and philosophy subjects Archaeology subjects Archaeology; HUMANIORA och RELIGIONSVETENSKAP Historisk-filosofiska ämnen Arkeologiämnen Arkeologi; Archaeological Science; laborativ arkeologi;

    Sammanfattning : The main aim of this thesis is to show how scientific methods may be used to look at migration in prehistory on the basis of archaeological material. The individuals examined represent the period 4 000 BC to 1 000 AD and have their geographical origins in various parts of Sweden.Ancient DNA analysis is employed in three cases. LÄS MER

  4. 4. Studies on Tropical Palaeo-variation in Climate and Cosmic Ray Influx Geochemical data from stalagmites collected in Tanzania and northern South Africa

    Detta är en avhandling från Stockholm : Institutionen för naturgeografi och kvartärgeologi

    Författare :Katarina Lundblad; Karin Holmgren; Augusto Mangini; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; palaeoclimatology; cosmic ray influx; stalagmites; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap;

    Sammanfattning : The main aims of this project were to contribute to the knowledge about tropical climate variations, and to investigate the possibilities of obtaining cosmic ray influx data from stalagmites.Stalagmites from Tanzania and northern South Africa were palaeoclimatologically analysed. LÄS MER

  5. 5. Holocene climate change and peatland dynamics in southern Sweden based on tree-ring analysis of subfossil wood from peat deposits

    Detta är en avhandling från Department of Geology, Lund University

    Författare :Johannes Edvardsson; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; The Holocene.; Peatland development; Scots pine; Palaeoclimatology; Dendrochronology; Subfossil trees; Raised bog; Palaeohydrology;

    Sammanfattning : Dendrochronological analysis was applied to subfossil remains of Scots pine (Pinus sylvestris L.) buried in South Swedish peat deposits. LÄS MER