Essays about: "Sediment"

Showing result 11 - 15 of 487 essays containing the word Sediment.

1. 11. Historical mining of Fe-Ca ore in Garpenberg, Sweden. : A study based on lake sediment geochemistry from Finnhytte-dammsjön.

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

   Author : Morgan Eliasson; [2023]
   Keywords : Paleolimnology; Lake sediment; XRF; Garpenberg; Mining history;

   Abstract : It is well established that mining and metallurgy on a larger scale in Sweden originated in Bergslagen. The historical mining district Garpenberg in Bergslagen presently show the oldest signs of mining in Sweden (2300 BP) based on a study of a lake sediment profile from Gruvsjön. READ MORE

3. 12. Mercury accumulation in lake sediments on different time scales – the influence of algal primary production

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

   Author : Anne Rebotzke; [2023]
   Keywords : mercury; lake sediment; primary productivity; algal scavenging; biogenic silica; diatom proxy; chlorophyll-a; organic matter;

   Abstract : The aim of this work is to test the proposed approach of algal scavenging as a driver of sediment mercury (Hg) on different time scales and to gain a better understanding of the mechanisms of Hg accumulation in lake sediments. A 3000-year sediment record from Nylandssjön in northern Sweden was analysed for this purpose, as well as a 20-year sediment record from the seasonal sediment traps of this lake. READ MORE

4. 13. The Influence of Macrophytes on Aquatic Microclimate

   University essay from Stockholms universitet/Institutionen för ekologi, miljö och botanik; Stockholms universitet/Institutionen för biologisk grundutbildning (BIG)

   Author : Julia Elliot; [2023]
   Keywords : ;

   Abstract : How terrestrial vegetation influences microclimate and what effects this has on associated ecosystems is well studied, but it is less known if and how aquatic macrophytes affect their microclimate. In this study I therefore aim to investigate the question of how aquatic macrophytes influence their microclimate, and how these effects in turn may affect associated aquatic organisms and ecosystems. READ MORE

5. 14. Reconstructing Mid-Late Holocene Arctic Climate Using Loess Deposits From Kangerlussuaq, Greenland

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : William Mörtsjö Zung; [2023]
   Keywords : ;

   Abstract : The current geological epoch, the Holocene, began 11,700 years ago. During this time, a thermal maximum in temperature was reached somewhere during the early-middle stage at 8-5 kyrs ago which was followed by a period of neoglacial cooling, culminating in the little ice age (LIA). READ MORE

6. 15. The geochemical status of the surface water and the sediments in the estuary of the Sangis River, Kalix, Sweden

   University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Author : Anton Sandberg; [2023]
   Keywords : Framboidal pyrite; dredging; Sangis River; estuary; redox ladder; sediment; sediment cores; SEM-EDS;

   Abstract : It has been common in forestry and agriculture to drain waterlogged areas through ditching in order to cultivate them. The ditches that drain water are usually connected to some watercourse, such as a river. READ MORE