Helena Alexanderson
professor II
Stillingsbeskrivelse
Professor II i kvartærgeologi
- Alexanderson, Helena; Hättestrand, Martina; Lindqvist, Mimmi A.; Sigfúsdóttir, Thorbjörg. MIS 3 age of the Veiki moraine in N Sweden – Dating the landform record of an intermediate-sized ice sheet in Scandinavia. Arctic, Antarctic and Alpine research 2022; Volum 54 (1). ISSN 1523-0430.s 239 - 261.s doi: 10.1080/15230430.2022.2091308.
- Alexanderson, Helena. Luminescence characteristics of Scandinavian quartz, their connection to bedrock provenance and influence on dating results. Quaternary Geochronology 2022; Volum 69. ISSN 1871-1014.s doi: 10.1016/j.quageo.2022.101272.
- Fakolade, Richard O.; Ikhane, Philip R.; Zhao, Qiuyue; Hao, Qingzhen; Alexanderson, Helena; Guo, Zhengtang. Luminescence dating of holocene siliciclastic sediments in eastern Dahomey Basin, southwestern Nigeria. Quaternary International 2021; Volum 598. ISSN 1040-6182.s 90 - 96.s doi: 10.1016/j.quaint.2021.05.024.
- Kalińska, Edyta; Alexanderson, Helena; Krievāns, Māris. The Raunis section, central Latvia, revisited: first luminescence results and re-evaluation of a key Baltic States stratigraphic site. Geografiska Annaler: Series A, Physical Geography 2020; Volum 102 (4). ISSN 0435-3676.s 376 - 396.s doi: 10.1080/04353676.2020.1813982.
- Goodship, Alastair; Alexanderson, Helena. Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden. GFF 2020; Volum 142 (4). ISSN 1103-5897.s 325 - 345.s doi: 10.1080/11035897.2020.1822437.
- Farnsworth, Wesley Randall; Allaart, Lis; Ingólfsson, Ólafur; Alexanderson, Helena; Forwick, Matthias; Noormets, Riko; Retelle, Michael J.; Schomacker, Anders. Holocene glacial history of Svalbard: Status, perspectives and challenges. Earth-Science Reviews 2020; Volum 208. ISSN 0012-8252.s 1 - 28.s doi: 10.1016/j.earscirev.2020.103249.
- Doverbratt, Isa; Alexanderson, Helena. Transferring grains from single-grain luminescence discs to SEM specimen stubs. Methods and Protocols (MP) 2019; Volum 2 (4). ISSN 2409-9279.s doi: 10.3390/mps2040087.
- Alexanderson, Helena; Henriksen, Mona; Ryen, Heidi Torgunrud; Landvik, Jon Y.; Peterson, Gustaf. 200 ka of glacial events in NW Svalbard: an emergence cycle facies model and regional correlations. Arktos 2018; Volum 4. ISSN 2364-9453.s doi: 10.1007/s41063-018-0037-z.
- Alexanderson, Helena; Landvik, Jon Y.. Sediments of MIS 5e age suggested by new OSL dates from the Skilvika section, west Svalbard. Polar Research 2018; Volum 37. ISSN 0800-0395.s doi: 10.1080/17518369.2018.1503907.
- Anjar, Johanna; Alexanderson, Helena; Larsen, Eiliv; Lyså, Astrid. OSL dating of Weichselian ice-free periods at Skorgenes, Western Norway. (fulltekst) Norwegian Journal of Geology 2018; Volum 98 (3). ISSN 2387-5844.s 19 - 31.s doi: 10.17850/njg98-3-02.
- Matthews, John A.; Alexanderson, Helena; Skoglund, Rannveig Øvrevik. Holocene storminess and climate change in Lofoten and Vesterålen, Northern Norway. Norsk Geografisk Tidsskrift 2016; Volum 70 (5). ISSN 0029-1951.s 316 - 317.s doi: 10.1080/00291951.2016.1236833.
- Alexanderson, Helena; Henriksen, Mona. A short-lived aeolian event during the Early Holocene in southeastern Norway. Quaternary Geochronology 2015; Volum 30 (Part B). ISSN 1871-1014.s 175 - 180.s doi: 10.1016/j.quageo.2015.02.014.
- Alexanderson, Helena; Ingólfsson, Ólafur; Murray, Andrew S.; Dudek, Justyna. An interglacial polar bear and an early Weichselian glaciation at Poolepynten, western Svalbard. Boreas 2013; Volum 42 (3). ISSN 0300-9483.s 532 - 543.s doi: 10.1111/j.1502-3885.2012.00289.x.
- Alexanderson, Helena; Murray, Andrew S.. Problems and potential of OSL dating Weichselian and Holocene sediments in Sweden. Quaternary Science Reviews 2012; Volum 44. ISSN 0277-3791.s 37 - 50.s doi: 10.1016/j.quascirev.2009.09.020.
- Alexanderson, Helena; Murray, Andrew S.. Luminescence signals from modern sediments in a glaciated bay, NW Svalbard. Quaternary Geochronology 2012; Volum 10. ISSN 1871-1014.s 250 - 256.s doi: 10.1016/j.quageo.2012.01.001.
- Alexanderson, Helena; Landvik, Jon; Molodkov, Anatoly; Murray, Andrew S.. A multi-method approach to dating middle and late Quaternary high relative sea-level events on NW Svalbard - A case study. Quaternary Geochronology 2011; Volum 6 (3-4). ISSN 1871-1014.s 326 - 340.s doi: 10.1016/j.quageo.2011.04.001.
- Alexanderson, Helena; Landvik, Jon Y.; Ryen, Heidi T. Chronology and styles of glaciation in an inter-fjord setting, northwestern Svalbard. Boreas 2011; Volum 40 (1). ISSN 0300-9483.s 175 - 197.s doi: 10.1111/j.1502-3885.2010.00175.x.
- Alexanderson, Helena. Sub-till glaciofluvial sediments at Hultsfred, South Swedish Upland. (omtale) GFF 2010; Volum 132 (3-4). ISSN 1103-5897.s 153 - 159.s doi: 10.1080/11035897.2010.508134.
- Alexanderson, Helena; Johnsen, Timothy; Murray, Andrew S. Re-dating the Pilgrimstad Interstadial with OSL: a warmer climate and a smaller ice sheet during the Swedish Middle Weichselian (MIS 3)?. (omtale) Boreas 2010; Volum 39 (2). ISSN 0300-9483.s 367 - 376.s doi: 10.1111/j.1502-3885.2009.00130.x.
- Johnsen, Timothy; Alexanderson, Helena; Fabel, Derek; Freeman, S.. NEW (BE)-B-10 COSMOGENIC AGES FROM THE VIMMERBY MORAINE CONFIRM THE TIMING OF SCANDINAVIAN ICE SHEET DEGLACIATION IN SOUTHERN SWEDEN. (omtale) Geografiska Annaler: Series A, Physical Geography 2009; Volum 91A (2). ISSN 0435-3676.s 113 - 120.s doi: 10.1111/j.1468-0459.2009.00358.x.
- Håkansson, Lena; Alexanderson, Helena; Hjort, Christian; Möller, Per; Briner, Jason; Aldahan, Ala; Possnert, Gøran. Late Pleistocene glacial history of Jameson Land, central East Greenland, derived from cosmogenic Be-10 and Al-26 exposure dating. (omtale) Boreas 2009; Volum 38 (2). ISSN 0300-9483.s 244 - 260.s doi: 10.1111/j.1502-3885.2008.00064.x.
- Alexanderson, Helena; Eskola, Kari O; Helmens, Karin F. Optical Dating of a Late Quaternary Sediment Sequence from Sokli, Northern Finland. (omtale) Geochronometria 2008; Volum 32. ISSN 1733-8387.s 51 - 59.s doi: 10.2478/v10003-008-0022-9.
Forskningsinteresser
Som kvartærgeolog vil jeg vite hva som har skjedd under kvartärtidens istider og mellomistider, hvordan landskap og miljøer har forandret seg, og forstå hvorfor. Jeg bruker geologiske arkiv som sediment, stratigrafier og landformer for å rekonstruere istidsmiljøene og bruker dateringsmetoder som luminescensdatering for å finne ut hvornår forskjellige ting skjedde. Geografisk arbeider jeg forholdsvis i Arktis og Skandinavien.
Mine hovedsaklige pågående forskningsprosjekt handler om glasiasjonshistorie og deposisjonsmiljöer under de siste 200 000 år i nordlige Sverige og på Svalbard, samt om postglasial flygesand i Sverige og Norge. Som forestander for Lunds Luminiscenslaboratorium forsker jeg også om luminescens og er samarbeidspartner i flere prosjekter som bruker luminiscensdatering i forskjellige deler av verlden.
Undervisning
Jeg underviser i sedimentologi, geomorfologi, glasialgeologi og geokronologi ved UiT, Lunds universitet og UNIS. Foruten det faglige er jeg også interessert av å utvikle pedagogikk innenfor geofagundervisning og i 2015 ble jeg utnevnt til Excellent Teaching Practitioner.