Essays about: "varve"

Found 4 essays containing the word varve.

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

    University essay from Lunds universitet/Geologiska institutionen

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

    Abstract : 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. READ MORE

  3. 2. Lake condition changes of a boreal lake over the past ca. 6500 years based on varve geochemistry

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Jora Ligtenberg; [2017]
    Keywords : varved lake sediment; total element concentrations; biogenic silica; lake-water organic carbon; Holocene;

    Abstract : The purpose of this study was to assess changes in the in-lake conditions of lake Kassjön, northern Sweden, in response to environmental and climate changes over the past ca. 6500 years. READ MORE

  4. 3. 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

    University essay from Lunds universitet/Geologiska institutionen

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

    Abstract : 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. READ MORE

  5. 4. 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

    University essay from Lunds universitet/Geologiska institutionen

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

    Abstract : 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. READ MORE