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The 200-year history of nss-SO42- concentration in snow and ice from Lomonosovfonna, Svalbard
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2015 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Sulfatkoncentrationens 200-åriga historia i snö och is från Lomonosovfonna, Svalbard (Swedish)
Abstract [en]

Environmental scientists use ice-core records to reconstruct past atmospheric conditions. Anthropogenic and natural sources of emissions can be traced when analyzing ions in the ice, which is included in the science of glaciochemistry. Sulfate is an excellent ion to use in these studies since it is traceable to these emissions. This study is therefore focused on the sulfate ion, how its concentration has fluctuated over the last 200-years and when a change of trend occurred. The ice-cores used in this study were extracted at Lomonosovfonna, Svalbard, and analyzed by Ion Chromatography (IC). The new data that has been brought forth in this study covers nss-SO42- concentrations in the years of 1998-2012 and is connected to previous extracted ice-core records. The results of nss-SO42- concentration in the ice-cores confirm the change of trend in the 1970s. The increasing trend in the result correlate with historical emissions and the decrease after the change of trend enhances less anthropogenic impact on the atmosphere.

Abstract [sv]

Miljöforskare använder sig av isborrkärnor för att återskapa tidigare atmosfäriska förhållanden. Antropogena och naturliga utsläppskällor kan spåras genom att analysera joner i isen. Sulfat är en utmärkt jon att använda sig av i dessa studier, eftersom den kan anknytas till dessa utsläpp. Denna studie fokuserar därför på sulfatjonen, hur dess koncentration har ändrats under de senaste 200-åren och på det trendbrott som har ägt rum. Isborrkärnorna som har använts i denna studie borrades upp på Lomonosovfonna, Svalbard, och analyserades med jonkromato-grafi. Ny data som har tagits fram i den här studien täcker nss-SO42- koncentrationen mellan 1998-2012 och är sammankopplad med tidigare framtagen data från samma plats. Resultatet av nss-SO42- koncentrationen i isborrkärnorna bekräftar trendbrottet som inträffade på 1970-talet. Den ökande trenden i resultatet korrelerar med historiska utsläpp och minskningen efter trendbrottet påvisar mindre antropogen påverkan på atmosfären.

Place, publisher, year, edition, pages
2015. , 41 p.
Series
Självständigt arbete vid institutionen för geovetenskaper, 2015:16
Keyword [en]
Sulfate, nss-SO42-, ice-cores, glaciochemistry, Lomonosovfonna
Keyword [sv]
Sulfat, nss-SO42-, isborrkärnor, iskemi, Lomonosovfonna
National Category
Earth and Related Environmental Sciences Physical Geography
Identifiers
URN: urn:nbn:se:uu:diva-255691OAI: oai:DiVA.org:uu-255691DiVA: diva2:823231
Educational program
Bachelor Programme in Earth Science
Presentation
2015-06-04, Hambergsalen, Institutionen för geovetenskaper, Uppsala universitet, Villavägen 16, Uppsala, 15:20 (Swedish)
Supervisors
Examiners
Available from: 2015-06-18 Created: 2015-06-17 Last updated: 2015-06-18Bibliographically approved

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The 200-Year History of nss-SO4 2- Concentration in Snow and Ice from Lomonosovfonna, Svalbard(1024 kB)232 downloads
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