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Helena Alexanderson

professor II Institutt for geovitenskap
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  3. Helena Alexanderson

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.

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.

Professor II i kvartærgeologi

  • 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.

  • 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.

  • 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.

  • 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.

  • Anjar, Johanna; Alexanderson, Helena; Larsen, Eiliv; Lyså, Astrid. OSL dating of Weichselian ice-free periods at Skorgenes, Western Norway. (Fulltekst: https://njg.geologi.no/images/NJG_articles/NJG_Vol98_Nr3_Art2_Anjar.pdf Norwegian Journal of Geology 2018; Volum 98 (3). ISSN 2387-5844.s 19 - 31.s doi: 10.17850/njg98-3-02.

  • 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.

  • 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 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; 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; 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: http://dx.doi.org/10.1111/j.1502-3885.2009.00130.x) Boreas 2010; Volum 39 (2). ISSN 0300-9483.s 367 - 376.s doi: 10.1111/j.1502-3885.2009.00130.x.

  • Alexanderson, Helena. Sub-till glaciofluvial sediments at Hultsfred, South Swedish Upland. (Omtale: http://dx.doi.org/10.1080/11035897.2010.508134) GFF 2010; Volum 132 (3-4). ISSN 1103-5897.s 153 - 159.s doi: 10.1080/11035897.2010.508134.

  • 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: http://dx.doi.org/doi:10.1111/j.1502-3885.2008.00064.x) Boreas 2009; Volum 38 (2). ISSN 0300-9483.s 244 - 260.s doi: 10.1111/j.1502-3885.2008.00064.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: http://dx.doi.org/doi:10.1111/j.1468-0459.2009.00358.x) 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.

  • Alexanderson, Helena; Eskola, Kari O; Helmens, Karin F. Optical Dating of a Late Quaternary Sediment Sequence from Sokli, Northern Finland. (Omtale: http://dx.doi.org/doi:10.2478/v10003-008-0022-9) Geochronometria 2008; Volum 32. ISSN 1733-8387.s 51 - 59.s doi: 10.2478/v10003-008-0022-9.

  • Henriksen, Mona; Alexanderson, Helena; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. Facies model for a rebound cycle based on mid-late Quaternary sediments in the Kongsfjorden area, NW Svalbard. 33rd Nordic Geological Winter Meeting 2018-01-10 - 2018-01-12 2018.

  • Alexanderson, Helena; Henriksen, Mona; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. A 200 ka glaciation history from NW Svalbard. 33rd Nordic Geological Winter Meeting 2018-01-10 - 2018-01-12 2018.

  • Henriksen, Mona; Alexanderson, Helena; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. Non-glacial deposits key to the late Quaternary history of NW Svalbard. 5th international conference on Palaeo-Arctic Spatial and Temporal (PAST) Gateways 2017-05-22 - 2017-05-26 2017.

  • Das, Vikas Kumar; Ghosh, Anupam; Alexanderson, Helena; Henriksen, Mona; Landvik, Jon Y.; Ryen, Heidi T.. Palaeoenvironmental reconstructions of the Late Pleistocene deposits of (Northwestern) Spitsbergen, Svalbard – constraints from benthic foraminiferal records. 24th West Bengal State Science and Technology Congress 2017-02-28 - 2017-03-01 2017.

  • Ghosh, Anupam; Das, Vikas Kumar; Chatterjee, Debolina; Alexanderson, Helena; Henriksen, Mona; Landvik, Jon Y.; Ryen, Heidi T.. Palaeoenvironmental reconstructions of the Late Pleistocene deposits of (Northwestern) Spitsbergen, Svalbard – constraints from benthic foraminiferal records. North American Micropaleontological Society- Microfossils IV Conference 2017-04-05 - 2017-04-08 2017.

  • Alexanderson, Helena; Henriksen, Mona; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. A 200 ka glaciation history from NW Svalbard. 5th international conference on Palaeo-Arctic Spatial and Temporal (PAST) Gateways 2017-05-22 - 2017-05-26 2017.

  • Das, Vikas Kumar; Ghosh, Anupam; Alexanderson, Helena; Henriksen, Mona; Landvik, Jon Y.; Ryen, Heidi Torgunrud. Palaeoenvironmental reconstructions of the Late Pleistocene deposits of Kongsfjorden in the Svalbard region, based on multiproxy approach. XIX INQUA Congress 2015-07-26 - 2015-08-02 2015.

  • Alexanderson, Helena; Bernhardson, Martin; Henriksen, Mona; Jakobsen, Leif Vidar; Shrestha, Rajendra. Inland dunes and cover sand in Southern Sweden and Norway – evidence of late glacial and historical aeolian activity. 31st Nordic Geological Winter Meeting 2014-01-08 - 2014-01-10 2014.

  • Alexanderson, Helena; Henriksen, Mona. A short-lived aeolian event during the Early Holocene in southern Norway. 14th International Conference on Luminescence and Electron Spin Resonance Dating 2014-07-07 - 2014-07-11 2014.

  • Henriksen, Mona; Alexanderson, Helena; Landvik, Jon Y.; Ryen, Heidi Torgunrud. Improved Late Quaternary stratigraphy and chronology in the Kongsfjorden area, NW Svalbard. PAST Gateways international conference and workshop 2014-05-19 - 2014-05-23 2014.

  • Landvik, Jon Y.; Henriksen, Mona; Alexanderson, Helena; Ingólfsson, Ólafur. Landscape imprints of changing glacial regimes during ice sheet build-up and decay: a study from Svalbard, Norwegian Arctic. AGU Fall Meeting 2013 2013-12-09 - 2013-12-12 2013.

  • Alexanderson, Helena; Henriksen, Mona; Ingólfsson, Ólafur; Landvik, Jon Y.. A revised glacial history of Svalbard. 'PAST Gateways' first international conference and workshop 2013-05-13 - 2013-05-17 2013.

  • Henriksen, Mona; Alexanderson, Helena; Landvik, Jon Y.; Linge, Henriette; Peterson, Gustaf. The Late Weichselian Kongsfjorden ice stream, NW Svalbard: surface exposure age constraints on ice dynamics and retreat. 'PAST Gateways' first international conference and workshop 2013-05-13 - 2013-05-17 2013.

  • Henriksen, Mona; Landvik, Jon Y.; Peterson, Gustaf; Alexanderson, Helena. New data on Late Weichselian ice stream configuration in Kongsfjorden, NW Svalbard. 30th Nordic Geological Winter Meeting 2012-01-09 - 2012-01-12 2012.

  • Henriksen, Mona; Landvik, Jon Y.; Peterson, Gustaf; Alexanderson, Helena. Exposure age constraints on the Late Weichselian ice stream configuration in Kongsfjorden, NW Svalbard. Nordic workshop on cosmogenic nuclide dating 2012-05-21 - 2012-05-22 2012.

  • Henriksen, Mona; Alexanderson, Helena; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. Facies model for a rebound cycle based on mid-late Quaternary sediments in the Kongsfjorden area, NW Svalbard. 33rd Nordic Geological Winter Meeting 2018-01-10 - 2018-01-12 2018.

  • Alexanderson, Helena; Henriksen, Mona; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. A 200 ka glaciation history from NW Svalbard. 33rd Nordic Geological Winter Meeting 2018-01-10 - 2018-01-12 2018.

  • Henriksen, Mona; Alexanderson, Helena; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. Non-glacial deposits key to the late Quaternary history of NW Svalbard. 5th international conference on Palaeo-Arctic Spatial and Temporal (PAST) Gateways 2017-05-22 - 2017-05-26 2017.

  • Das, Vikas Kumar; Ghosh, Anupam; Alexanderson, Helena; Henriksen, Mona; Landvik, Jon Y.; Ryen, Heidi T.. Palaeoenvironmental reconstructions of the Late Pleistocene deposits of (Northwestern) Spitsbergen, Svalbard – constraints from benthic foraminiferal records. 24th West Bengal State Science and Technology Congress 2017-02-28 - 2017-03-01 2017.

  • Ghosh, Anupam; Das, Vikas Kumar; Chatterjee, Debolina; Alexanderson, Helena; Henriksen, Mona; Landvik, Jon Y.; Ryen, Heidi T.. Palaeoenvironmental reconstructions of the Late Pleistocene deposits of (Northwestern) Spitsbergen, Svalbard – constraints from benthic foraminiferal records. North American Micropaleontological Society- Microfossils IV Conference 2017-04-05 - 2017-04-08 2017.

  • Alexanderson, Helena; Henriksen, Mona; Ryen, Heidi T.; Landvik, Jon Y.; Peterson, Gustaf. A 200 ka glaciation history from NW Svalbard. 5th international conference on Palaeo-Arctic Spatial and Temporal (PAST) Gateways 2017-05-22 - 2017-05-26 2017.

  • Das, Vikas Kumar; Ghosh, Anupam; Alexanderson, Helena; Henriksen, Mona; Landvik, Jon Y.; Ryen, Heidi Torgunrud. Palaeoenvironmental reconstructions of the Late Pleistocene deposits of Kongsfjorden in the Svalbard region, based on multiproxy approach. XIX INQUA Congress 2015-07-26 - 2015-08-02 2015.

  • Alexanderson, Helena; Bernhardson, Martin; Henriksen, Mona; Jakobsen, Leif Vidar; Shrestha, Rajendra. Inland dunes and cover sand in Southern Sweden and Norway – evidence of late glacial and historical aeolian activity. 31st Nordic Geological Winter Meeting 2014-01-08 - 2014-01-10 2014.

  • Alexanderson, Helena; Henriksen, Mona. A short-lived aeolian event during the Early Holocene in southern Norway. 14th International Conference on Luminescence and Electron Spin Resonance Dating 2014-07-07 - 2014-07-11 2014.

  • Henriksen, Mona; Alexanderson, Helena; Landvik, Jon Y.; Ryen, Heidi Torgunrud. Improved Late Quaternary stratigraphy and chronology in the Kongsfjorden area, NW Svalbard. PAST Gateways international conference and workshop 2014-05-19 - 2014-05-23 2014.

  • Landvik, Jon Y.; Henriksen, Mona; Alexanderson, Helena; Ingólfsson, Ólafur. Landscape imprints of changing glacial regimes during ice sheet build-up and decay: a study from Svalbard, Norwegian Arctic. AGU Fall Meeting 2013 2013-12-09 - 2013-12-12 2013.

  • Alexanderson, Helena; Henriksen, Mona; Ingólfsson, Ólafur; Landvik, Jon Y.. A revised glacial history of Svalbard. 'PAST Gateways' first international conference and workshop 2013-05-13 - 2013-05-17 2013.

  • Henriksen, Mona; Alexanderson, Helena; Landvik, Jon Y.; Linge, Henriette; Peterson, Gustaf. The Late Weichselian Kongsfjorden ice stream, NW Svalbard: surface exposure age constraints on ice dynamics and retreat. 'PAST Gateways' first international conference and workshop 2013-05-13 - 2013-05-17 2013.

  • Henriksen, Mona; Landvik, Jon Y.; Peterson, Gustaf; Alexanderson, Helena. New data on Late Weichselian ice stream configuration in Kongsfjorden, NW Svalbard. 30th Nordic Geological Winter Meeting 2012-01-09 - 2012-01-12 2012.

  • Henriksen, Mona; Landvik, Jon Y.; Peterson, Gustaf; Alexanderson, Helena. Exposure age constraints on the Late Weichselian ice stream configuration in Kongsfjorden, NW Svalbard. Nordic workshop on cosmogenic nuclide dating 2012-05-21 - 2012-05-22 2012.

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