Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard
Although remote, the Arctic is influenced by long-range pollution from lower latitudes. Lake sediments are sensitive to minor environmental changes, and thus accumulated heavy metals and organic substitutes can represent the concentration trends through time and as a climate proxy. To assess the ext...
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Norwegian University of Life Sciences, Ås
2022
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Online Access: | https://hdl.handle.net/11250/3038376 |
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ftunivmob:oai:nmbu.brage.unit.no:11250/3038376 2023-05-15T15:16:31+02:00 Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard Vognild, Karoline Kristin Rohrlack, Thomas Riise, Gunnhild Mikkelsen, Øyvind Norway, Svalbard 2022 application/pdf https://hdl.handle.net/11250/3038376 eng eng Norwegian University of Life Sciences, Ås https://hdl.handle.net/11250/3038376 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no CC-BY-NC-ND Long-range pollution Climate proxies Sediment record Sarsvatnet Master thesis 2022 ftunivmob 2022-12-21T23:44:10Z Although remote, the Arctic is influenced by long-range pollution from lower latitudes. Lake sediments are sensitive to minor environmental changes, and thus accumulated heavy metals and organic substitutes can represent the concentration trends through time and as a climate proxy. To assess the extent of long-range pollution influence in Lake Sarsvatnet, Svalbard, and the different forcing mechanisms in the catchment, chlorophyll a, Loss on Ignition (LOI), and selected heavy metals were analysed from a sediment core. Selected elements are aluminium (Al), arsenic (As), cadmium (Cd), calcium (Ca), chromium (Cr), copper (Cu), iron (Fe), lead (Pb), magnesium (Mg), manganese (Mn), nickel (Ni), phosphorus (P), potassium (K), sodium (Na), sulphur (S), titanium (Ti), and zinc (Zn). Results indicate that Cd in the sediment surface is derived from bird guano and atmospheric deposition from long-range pollution. A contribution of Pb concentrations in the sediment surface may originate from atmospheric deposition, however, more research is needed as geological processes likely contribute most of the Pb content in Sarsvatnet. Climate proxies (LOI and Chlorophyll a) demonstrated historical periods e.g., the Little Ice Age and Medieval Climate Anomaly. Although variations over the last 1100 years, increased primary production and elemental concentrations in the last century are major findings identified in this thesis. With rising temperatures, precipitation, and bedrock weathering, it is fair to expect an alternation of elements, primary production residues, and soil organic matter in the Sarsvatnet catchment in the future. In other words, climate change has a more significant impact on the composition of the sediments in Sarsvatnet than long-range pollution. This master’s thesis provides an updated evaluation of the status quo in Sarsvatnet catchment and could be relevant to further investigations at Ossian Sars. Til tross for at arktiske områder er avsidesliggende, er Arktis påvirket av langtransportert forurensning fra ... Master Thesis Arctic Arktis Arktis* Climate change Svalbard Open archive Norwegian University of Life Sciences: Brage NMBU Arctic Svalbard Norway Guano ENVELOPE(141.604,141.604,-66.775,-66.775) Remote Lake ENVELOPE(-70.700,-70.700,70.996,70.996) Sarsvatnet ENVELOPE(12.500,12.500,78.967,78.967) |
institution |
Open Polar |
collection |
Open archive Norwegian University of Life Sciences: Brage NMBU |
op_collection_id |
ftunivmob |
language |
English |
topic |
Long-range pollution Climate proxies Sediment record Sarsvatnet |
spellingShingle |
Long-range pollution Climate proxies Sediment record Sarsvatnet Vognild, Karoline Kristin Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard |
topic_facet |
Long-range pollution Climate proxies Sediment record Sarsvatnet |
description |
Although remote, the Arctic is influenced by long-range pollution from lower latitudes. Lake sediments are sensitive to minor environmental changes, and thus accumulated heavy metals and organic substitutes can represent the concentration trends through time and as a climate proxy. To assess the extent of long-range pollution influence in Lake Sarsvatnet, Svalbard, and the different forcing mechanisms in the catchment, chlorophyll a, Loss on Ignition (LOI), and selected heavy metals were analysed from a sediment core. Selected elements are aluminium (Al), arsenic (As), cadmium (Cd), calcium (Ca), chromium (Cr), copper (Cu), iron (Fe), lead (Pb), magnesium (Mg), manganese (Mn), nickel (Ni), phosphorus (P), potassium (K), sodium (Na), sulphur (S), titanium (Ti), and zinc (Zn). Results indicate that Cd in the sediment surface is derived from bird guano and atmospheric deposition from long-range pollution. A contribution of Pb concentrations in the sediment surface may originate from atmospheric deposition, however, more research is needed as geological processes likely contribute most of the Pb content in Sarsvatnet. Climate proxies (LOI and Chlorophyll a) demonstrated historical periods e.g., the Little Ice Age and Medieval Climate Anomaly. Although variations over the last 1100 years, increased primary production and elemental concentrations in the last century are major findings identified in this thesis. With rising temperatures, precipitation, and bedrock weathering, it is fair to expect an alternation of elements, primary production residues, and soil organic matter in the Sarsvatnet catchment in the future. In other words, climate change has a more significant impact on the composition of the sediments in Sarsvatnet than long-range pollution. This master’s thesis provides an updated evaluation of the status quo in Sarsvatnet catchment and could be relevant to further investigations at Ossian Sars. Til tross for at arktiske områder er avsidesliggende, er Arktis påvirket av langtransportert forurensning fra ... |
author2 |
Rohrlack, Thomas Riise, Gunnhild Mikkelsen, Øyvind |
format |
Master Thesis |
author |
Vognild, Karoline Kristin |
author_facet |
Vognild, Karoline Kristin |
author_sort |
Vognild, Karoline Kristin |
title |
Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard |
title_short |
Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard |
title_full |
Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard |
title_fullStr |
Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard |
title_full_unstemmed |
Long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake Sarsvatnet, Svalbard |
title_sort |
long-range pollution and historic climate and element trends in an 1100-year lake sediment record from the remote lake sarsvatnet, svalbard |
publisher |
Norwegian University of Life Sciences, Ås |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3038376 |
op_coverage |
Norway, Svalbard |
long_lat |
ENVELOPE(141.604,141.604,-66.775,-66.775) ENVELOPE(-70.700,-70.700,70.996,70.996) ENVELOPE(12.500,12.500,78.967,78.967) |
geographic |
Arctic Svalbard Norway Guano Remote Lake Sarsvatnet |
geographic_facet |
Arctic Svalbard Norway Guano Remote Lake Sarsvatnet |
genre |
Arctic Arktis Arktis* Climate change Svalbard |
genre_facet |
Arctic Arktis Arktis* Climate change Svalbard |
op_relation |
https://hdl.handle.net/11250/3038376 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766346823684849664 |