Helle Astrid Kjær

Helle Astrid Kjær

Assistant professor


  1. Published

    A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica. / Winstrup, Mai; Vallelonga, Paul; Kjaer, Helle A.; Fudge, Tyler J.; Lee, James E.; Riis, Marie H.; Edwards, Ross; Bertler, Nancy A. N.; Blunier, Thomas; Brook, Ed J.; Buizert, Christo; Ciobanu, Gabriela; Conway, Howard; Dahl-Jensen, Dorthe; Ellis, Aja; Emanuelsson, B. Daniel; Hindmarsh, Richard C. A.; Keller, Elizabeth D.; Kurbatov, Andrei V.; Mayewski, Paul A.; Neff, Peter D.; Pyne, Rebecca L.; Simonsen, Marius F.; Svensson, Anders; Tuohy, Andrea; Waddington, Edwin D.; Wheatley, Sarah.

    In: Climate of the Past, Vol. 15, No. 2, 10.04.2019, p. 751-779.

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Published

    A High-Resolution Continuous Flow Analysis System for Polar Ice Cores. / Dallmayr, Remi; Goto-Azuma, Kumiko; Kjær, Helle Astrid; Azuma, Nobuhiko; Takata, Morimasa; Schüpbach, Simon; Hirabayashi, Motohiro.

    In: Bulletin of Glaciological Research, Vol. 34, 2016, p. 11-20.

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Published

    A novel approach to process brittle ice for continuous flow analysis of stable water isotopes. / Pyne, Rebecca L.; Keller, Elizabith D.; Canessa, Silvia; Bertler, Nancy A.; Pyne, Alex R.; Pyne, Alex R.; Mandeno, Darcy; Vallelonga, Paul Travis; Semper, Stefanie; Kjær, Helle Astrid; Hutchison, Ed; Baisden, W. Troy.

    In: Journal of Glaciology, Vol. 64, No. 243, 16.03.2018, p. 1-11.

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Published

    A novel method for the detection of acidity in ice cores. / Kjær, Helle Astrid; Vallelonga, Paul Travis; Svensson, Anders.

    European Geosciences Union General Assembly 2014, 16, 27 April – 02 May 2014. European Geosciences Union. ed. Vienna, Austria, 2014. 1526.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  5. Published

    Afslørende kemi i Grønlands og Antarktis' iskerner. / Svensson, Anders; Kjær, Helle Astrid.

    In: Dansk Kemi, Vol. 9, 01.06.2018, p. 18-21.

    Research output: Contribution to journalJournal articleResearchpeer-review

  6. Published

    An Optical Dye Method for Continuous Determination of Acidity in Ice Cores. / Kjær, Helle Astrid; Vallelonga, Paul Travis; Svensson, Anders; Kristensen, Magnus Elleskov; Tibuleac, Catalin; Winstrup, Mai; Kipfstuhl, Seep.

    In: Environmental Science & Technology, Vol. 50, No. 19, 01.09.2016, p. 10485-10493.

    Research output: Contribution to journalJournal articleResearchpeer-review

  7. Assessment of the temperature, precipitation and snow in the RCM HIRHAM4 at 25 km resolution : Danish Climate Centre Report 09-08. / Kjær, Helle Astrid.

    Assessment of the temperature, precipitation and snow in the RCM HIRHAM4 at 25 km resolution: Danish Climate Centre Report 09-08. Danmarks Meterologiske Institut (DMI), 2009.

    Research output: Chapter in Book/Report/Conference proceedingReport chapterResearch

  8. Published

    Constraining Glacial input of phosphorus to the oceans based on Greenland ice core evidence. / Kjær, Helle Astrid; Gotto-Azuma, Kumiko; Dallmayr, R.; Hirabayashi, M.; Vallelonga, Paul Travis; Svensson, Anders.

    European Geosciences Union General Assembly 2014, 16, 27 April – 02 May 2014. European Geosciences Union. ed. Vienna, Austria, 2014. 1524.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  9. Published

    Continuous Chemistry in Ice Cores : Phosphorus, pH and the Photolysis of Humic Like Substances. / Kjær, Helle Astrid.

    The Niels Bohr Institute, Faculty of Science, University of Copenhagen, 2014.

    Research output: Book/ReportPh.D. thesisResearch

  10. Published

    Continuous Flow Analysis Method for Determination of Dissolved Reactive Phosphorus in Ice Cores. / Kjær, Helle Astrid; Vallelonga, Paul Travis; Svensson, Anders; Elleskov L. Kristensen, Magnus; Tibuleac, Catalin; Bigler, Matthias.

    In: Environmental Science & Technology (Washington), Vol. 47, No. 21, 05.11.2013, p. 12325-12332.

    Research output: Contribution to journalJournal articleResearchpeer-review

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