Sökning: "Holocene varved lake sediments"

Hittade 5 uppsatser innehållade orden Holocene varved lake sediments.

1. 1. Odensjön - A new varved lake sediment record from southern Sweden

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Hanna Hertzman; [2021]
   Nyckelord :Varved lake sediment; late Holocene; organic sediments; diatoms; land-use history; southern Sweden; palaeolimnology; Earth and Environmental Sciences;

   Sammanfattning : Annually laminated (varved) sediments provide opportunities to reconstruct climate change and human impact on the environment with high temporal resolution. Depending on the character of the varves, such sediments can provide insight into the delivery of both autochthonous and allochthonous material from the lake and its catch- ment and answer questions regarding both regional and local responses to climate- and land-use changes. LÄS MER

3. 2. Environmental change during the Holocene : A comparative multi-proxy study of landscape disturbances in Northern Sweden

   Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Mégane Capel; [2019]
   Nyckelord :Holocene; Lake-Water TOC; climate; lake sediment; vegetation;

   Sammanfattning : Varved lake sediments were used to provide information on how a landscape is affected by disturbances of different scales, from global (i.e. climatic) to local (i.e. LÄS MER

4. 3. Sedimentology and Catchment Processes of Lake Bolterskaret, Svalbard

   Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Matilda Elise Ruth Svensson; [2018]
   Nyckelord :Lacustrine sedimentation; Bolterskaret; late Holocene; Climate change; Varves;

   Sammanfattning : Lacustrine sediments are important archives of landscape and climate evolution. Varved sediments offer a high-resolution archive enabling studies on annual and seasonal scale. Understanding the alteration of sedimentation in glacial lakes under a changing climate is important for paleoclimate reconstructions. LÄS MER

5. 4. Testing the hypothesis of a link between Earth’s magnetic field and climate change : a case study from southern Sweden focusing on the 1st millennium BC

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Wenxin Ning; [2011]
   Nyckelord :paleomagnetism; varve; lake sediment; southern Sweden; climate reconstruction; human impact; sjösediment; södra Sverige; klimatåteruppbyggnad; mänsklig påverkan; Earth and Environmental Sciences;

   Sammanfattning : It is commonly believed that long-term (10 to 1000 kyr) and short-term (10 to 1000 years) climatic changes on Earth can be interpreted by periodic variations in Earth’s orbit around the Sun and variations in solar irradiance, respectively. In recent years, geomagnetic field changes have been suggested as a potential driver of climate change. LÄS MER

7. 5. Palaeomagnetic secular variations in the varved sediments of lake Gościąż, Poland : testing the stability of the natural remanent magnetization and validity of relative palaeointensity estimates

   Magister-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Andreas Nilsson; [2006]
   Nyckelord :Palaeomagnetism; Holocene varved lake sediments; varve chronology; geomagnetic models; Holocena varviga sjösediment; varvkronologi; geomagnetiska modeller; Earth and Environmental Sciences;

   Sammanfattning : Fyra två meter långa borrkärnor, med sjösediment från Gościąż, Polen, analyserades med hjälp av den s.k. Pseudo-Thellier metoden, en metod som används för att utvärdera tillförlitligheten av variationer av styrkan i det jordmagnetiska (palaeointensiteten) fältet över tiden. LÄS MER