Advanced search

Found 2 essays matching the above criteria.

1. 1. 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

3. 2. Long term organic carbon dynamics in 17 Swedish lakes : The impact of acid deposition and climate change

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Jessica Lovell; [2015]
   Keywords : environmental monitoring; climate change; sulfate deposition; total organic carbon TOC ; VNIRS; trend analysis; multivariate data analysis; PLS; miljöövervakning; klimatförändringar; sulfat deposition; organiskt kol; TOC; VNIRS; trendanalys; multivariat data analys; PLS;

   Abstract : During the last three decades, a number of studies based on national environmental monitoring data have found increased concentrations of total organic carbon (TOC) in surface waters in much of the northern hemisphere including Sweden. There are many hypothesis of what has been the main cause of this trend, including changes in land use, decreased atmospheric deposition of acidifying compounds and climate change. READ MORE