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Doctoral Research Fellow

Kjellman, Sofia Elisabeth

Department of Geosciences
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The aim of my PhD project is to reconstruct precipitation in Svalbard the last c. 12 000 years. Arctic precipitation is one of the main controls of glacier mass balance and closely linked to changes in sea ice extent. Precipitation varies a lot in time and space and has proved challenging to reconstruct due to the lack of good proxies. By analyzing the hydrogen isotopic composition of leaf waxes extracted from lake sediments, I investigate latitudinal gradients in precipitation seasonality and humidity through time. I also explore modern water isotope systematics to better understand the mechanisms behind changes in precipitation and lake water isotopic composition. I am particularly interested in precipitation seasonality, and how we can improve our understanding of precipitation isotope proxies to infer past climate. This project will improve our understanding of Arctic precipitation variability and allow us to place recent and current climate and environmental change into a long-term context.

PhD Candidate in Quaternary geology and paleoclimate

  • Allaart, Lis; Schomacker, Anders; Håkansson, Lena; Farnsworth, Wesley R.; Brynjólfsson, Skafti; Grumstad, Andreas; Kjellman, Sofia Elisabeth. Geomorphology and surficial geology of the Femmilsjøen area, northern Spitsbergen. Geomorphology 2021; Volum 382. ISSN 0169-555X.s doi: 10.1016/j.geomorph.2021.107693.

  • Alsos, Inger Greve; Lammers, Youri; Kjellman, Sofia Elisabeth; Merkel, Marie Føreid; Bender, Emma Marie; Rouillard, Alexandra; Erlendsson, Egill; Gudmundsdottir, Esther Ruth; Benediktsson, Ívar Örn; Farnsworth, Wesley Randall; Brynjólfsson, Skafti; Gísladóttir, Guðrún; Eddudóttir, Sigrún Dögg; Schomacker, Anders. Ancient sedimentary DNA shows rapid post-glacial colonisation of Iceland followed by relatively stable vegetation until the Norse settlement (Landnám) AD 870. Quaternary Science Reviews 2021; Volum 259. ISSN 0277-3791.s doi: 10.1016/j.quascirev.2021.106903.

  • Allaart, Lis; Schomacker, Anders; Larsen, Nicolaj K.; Nørmark, Egon; Rydningen, Tom Arne; Farnsworth, Wesley R.; Retelle, Michael J.; Brynjólfsson, Skafti; Forwick, Matthias; Kjellman, Sofia Elisabeth. Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation. Quaternary Science Reviews 2020; Volum 251 (106717). ISSN 0277-3791.s doi: 10.1016/j.quascirev.2020.106717.

  • Kjellman, Sofia Elisabeth; Schomacker, Anders; Thomas, Elizabeth K.; Håkansson, Lena; Duboscq, Sandrine; Cluett, Allison; Farnsworth, Wesley Randall; Allaart, Lis; Cowling, Owen; McKay, Nicholas P.; Brynjólfsson, Skafti; Ingólfsson, Ólafur. Holocene precipitation seasonality in northern Svalbard: Influence of sea ice and regional ocean surface conditions. Quaternary Science Reviews 2020; Volum 240. ISSN 0277-3791.s 1 - 15.s doi: 10.1016/j.quascirev.2020.106388.

  • Allaart, Lis; Müller, Juliane; Schomacker, Anders; Rydningen, Tom Arne; Håkansson, Lena; Kjellman, Sofia Elisabeth; Mollenhauer, Gesine; Forwick, Matthias. Late Quaternary glacier and sea-ice history of northern Wijdefjorden, Svalbard. Boreas 2020; Volum 49 (3). ISSN 0300-9483.s 417 - 437.s doi: 10.1111/bor.12435.

  • Voldstad, Linn Margrethe Høeg; Alsos, Inger Greve; Farnsworth, Wesley Randall; Heintzman, Peter D.; Håkansson, Lena; Kjellman, Sofia Elisabeth; Rouillard, Alexandra; Schomacker, Anders; Eidesen, Pernille Bronken. A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard. Quaternary Science Reviews 2020; Volum 234. ISSN 0277-3791.s 1 - 15.s doi: 10.1016/j.quascirev.2020.106207.

  • Schomacker, Anders; Farnsworth, Wesley Randall; Ingólfsson, Ólafur; Allaart, Lis; Håkansson, Lena; Retelle, Michael J.; Marie-Louise, Siggaard-Andersen; Korsgaard, Niels Jákup; Rouillard, Alexandra; Kjellman, Sofia Elisabeth. Postglacial relative sea level change and glacier activity in the early and late Holocene: Wahlenbergfjorden, Nordaustlandet, Svalbard. Scientific Reports 2019; Volum 9. ISSN 2045-2322.s doi: 10.1038/s41598-019-43342-z.

  • Kjellman, Sofia E.; Axelsson, Pia E.; Etzelmüller, Bernd; Westermann, Sebastian; Sannel, A. Britta K.. Holocene development of subarctic permafrost peatlands in Finnmark, northern Norway. (Fulltekst: https://journals.sagepub.com/doi/10.1177/0959683618798126 The Holocene 2018; Volum 28 (12). ISSN 0959-6836.s 1855 - 1869.s doi: 10.1177/0959683618798126.

  • Allaart, Lis; Schomacker, Anders; Forwick, Matthias; Rydningen, Tom Arne; Farnsworth, Wesley R.; Retelle, Michael J.; Håkansson, Lena; Brynjólfsson, Skafti; Kjellman, Sofia Elisabeth. Holocene environmental history of lake Femmilsjøen, northern Svalbard. Nordic Geological Winter Meeting 2020-01-08 - 2020-01-10 2020.

  • Kjellman, Sofia Elisabeth. Holocene precipitation seasonality in Svalbard inferred from δ2H of sedimentary leaf waxes. CHESS Annual Meeting 2020 2020-09-28 - 2020-09-30 2020.

  • Kjellman, Sofia Elisabeth; Schomacker, Anders; Thomas, Elizabeth K.. Lake Water Isotope Gradients in Arctic Norway, Sweden and Finland: Implications for Proxy-based Precipitation Reconstructions. AGU Fall Meeting 2020 (Sammendrag: https://agu.confex.com/agu/fm20/webprogram/Paper676629.html) 2020-12-01 - 2020-12-17 2020.

  • Eilertsen, Vårin Trælvik; Bulinová, Marie; Lockwood-Ireland, Christine; Allaart, Lis; Schomacker, Anders; Kjellman, Sofia Elisabeth. Fortidens klima/Paleoclimate. Geologiens Dag 2020/ Geology Day 2020 2020-09-13 - 2020-09-13 2020.

  • Kjellman, Sofia Elisabeth. Hydrogenisotopenes hemmelighet. (Fulltekst: https://www.geoforskning.no/nyheter/klima-og-co2/2287-hydrogenisotopenes-hemmelighet geoforskning.no 2020.

  • Schomacker, Anders; Kjellman, Sofia Elisabeth. Flyvende forskere – et klimaproblem. (Fulltekst: https://blogg.forskning.no/akademiet-for-yngre-forskere/flyvende-forskere--et-klimaproblem/1341477 Forskning.no 2019. ISSN 1891-635X.

  • Kjellman, Sofia Elisabeth. As a climate researcher, should I change my air-travel habits?. Nature 2019; Volum 571 (7766). ISSN 0028-0836.s S48 - S49.s doi: 10.1038/d41586-019-01652-2.

  • Allaart, Lis; Schomacker, Anders; Forwick, Matthias; Rydningen, Tom Arne; Farnsworth, Wesley Randall; Müller, Juliane; Retelle, Michael; Håkansson, Lena; Brynjólfsson, Skafti; Kjellman, Sofia Elisabeth. Wijdefjorden and Femmilsjøen – an integrated fjord-lake study in northern Spitsbergen. 20th Congress of the International Union for Quaternary Research (INQUA) 2019-07-24 - 2019-07-31 2019.

  • Allaart, Lis; Schomacker, Anders; Forwick, Matthias; Rydningen, Tom Arne; Farnsworth, Wesley Randall; Müller, Juliane; Retelle, Michael; Håkansson, Lena; Brynjólfsson, Skafti; Kjellman, Sofia Elisabeth. Wijdefjorden and Femmilsjøen - a fjord-lake study in northern Spitsbergen. 49th International Arctic Workshop 2019 2019-04-03 - 2019-04-05 2019.

  • Kjellman, Sofia Elisabeth; Schomacker, Anders; Thomas, Elizabeth K.; Håkansson, Lena; Duboscq, Sandrine; Cluett, Allison; Farnsworth, Wesley Randall; Allaart, Lis; Cowling, Owen. Leaf wax hydrogen isotope reconstruction of Holocene precipitation seasonality in High Arctic Svalbard. 49th International Arctic Workshop 2019-04-05 - 2019.

  • Kjellman, Sofia Elisabeth; Schomacker, Anders; Håkansson, Lena; Thomas, Elizabeth K.. Holocene Arctic precipitation and its response to sea ice extent - using leaf wax hydrogen isotopes as a proxy. IPA-IAL Joint Meeting 2018-06-18 - 2018-06-21 2018.

  • Allaart, Lis; Schomacker, Anders; Forwick, Matthias; Rydningen, Tom Arne; Farnsworth, Wesley R.; Retelle, Michael J.; Håkansson, Lena; Brynjólfsson, Skafti; Kjellman, Sofia Elisabeth. Holocene environmental history of lake Femmilsjøen, northern Svalbard. Nordic Geological Winter Meeting 2020-01-08 - 2020-01-10 2020.

  • Kjellman, Sofia Elisabeth. Holocene precipitation seasonality in Svalbard inferred from δ2H of sedimentary leaf waxes. CHESS Annual Meeting 2020 2020-09-28 - 2020-09-30 2020.

  • Kjellman, Sofia Elisabeth; Schomacker, Anders; Thomas, Elizabeth K.. Lake Water Isotope Gradients in Arctic Norway, Sweden and Finland: Implications for Proxy-based Precipitation Reconstructions. AGU Fall Meeting 2020 (Sammendrag: https://agu.confex.com/agu/fm20/webprogram/Paper676629.html) 2020-12-01 - 2020-12-17 2020.

  • Eilertsen, Vårin Trælvik; Bulinová, Marie; Lockwood-Ireland, Christine; Allaart, Lis; Schomacker, Anders; Kjellman, Sofia Elisabeth. Fortidens klima/Paleoclimate. Geologiens Dag 2020/ Geology Day 2020 2020-09-13 - 2020-09-13 2020.

  • Kjellman, Sofia Elisabeth. Hydrogenisotopenes hemmelighet. (Fulltekst: https://www.geoforskning.no/nyheter/klima-og-co2/2287-hydrogenisotopenes-hemmelighet geoforskning.no 2020.

  • Schomacker, Anders; Kjellman, Sofia Elisabeth. Flyvende forskere – et klimaproblem. (Fulltekst: https://blogg.forskning.no/akademiet-for-yngre-forskere/flyvende-forskere--et-klimaproblem/1341477 Forskning.no 2019. ISSN 1891-635X.

  • Kjellman, Sofia Elisabeth. As a climate researcher, should I change my air-travel habits?. Nature 2019; Volum 571 (7766). ISSN 0028-0836.s S48 - S49.s doi: 10.1038/d41586-019-01652-2.

  • Allaart, Lis; Schomacker, Anders; Forwick, Matthias; Rydningen, Tom Arne; Farnsworth, Wesley Randall; Müller, Juliane; Retelle, Michael; Håkansson, Lena; Brynjólfsson, Skafti; Kjellman, Sofia Elisabeth. Wijdefjorden and Femmilsjøen – an integrated fjord-lake study in northern Spitsbergen. 20th Congress of the International Union for Quaternary Research (INQUA) 2019-07-24 - 2019-07-31 2019.

  • Allaart, Lis; Schomacker, Anders; Forwick, Matthias; Rydningen, Tom Arne; Farnsworth, Wesley Randall; Müller, Juliane; Retelle, Michael; Håkansson, Lena; Brynjólfsson, Skafti; Kjellman, Sofia Elisabeth. Wijdefjorden and Femmilsjøen - a fjord-lake study in northern Spitsbergen. 49th International Arctic Workshop 2019 2019-04-03 - 2019-04-05 2019.

  • Kjellman, Sofia Elisabeth; Schomacker, Anders; Thomas, Elizabeth K.; Håkansson, Lena; Duboscq, Sandrine; Cluett, Allison; Farnsworth, Wesley Randall; Allaart, Lis; Cowling, Owen. Leaf wax hydrogen isotope reconstruction of Holocene precipitation seasonality in High Arctic Svalbard. 49th International Arctic Workshop 2019-04-05 - 2019.

  • Kjellman, Sofia Elisabeth; Schomacker, Anders; Håkansson, Lena; Thomas, Elizabeth K.. Holocene Arctic precipitation and its response to sea ice extent - using leaf wax hydrogen isotopes as a proxy. IPA-IAL Joint Meeting 2018-06-18 - 2018-06-21 2018.

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