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Niels Bohr Institute > Staff

Helle Astrid Kjær

Helle Astrid Kjær


  • Ice and Climate

    Juliane Maries Vej 30, 2100 København Ø, Hovedbygning, Building: 01-2-245

    Phone: +45 35 32 06 29

  1. 2016
  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.

    Publication: Research - peer-reviewJournal article

  3. Published

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

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

    Publication: Research - peer-reviewJournal article

  4. Published

    Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica. / Philippe, Morgane; Tison, Jean-Louis; Fjosne, Karen; Hubbard, Bryn; Kjær, Helle Astrid; Lenaerts, Jan T. M.; Drews, Reinhard; Sheldon, Simon Geoffrey; De Bondt, Kevin; Claeys, Philippe; Pattyn, Frank.

    In: Cryosphere, Vol. 10, No. 5, 25.10.2016, p. 2501-2516.

    Publication: Research - peer-reviewJournal article

  5. 2015
  6. Published

    The summer 2012 Greenland heat wave : In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event. / Bonne, Jean-Louis; Steen-Larsen, Hans Christian; Risi, Camille; Werner, Martin; Sodemann, Harald; Lacour, Jean-Lionel; Fettweis, Xavier; Cesana, Grégory; Delmotte, Marc; Cattani, Olivier; Vallelonga, Paul Travis; Kjær, Helle Astrid; Clerbaux, Cathy; Svienbjörndóttir, Árny Erla; Masson-Delmotte, Valérie.

    In: Journal of Geophysical Research, Vol. 120, No. 7, 01.04.2015, p. 2970-2989.

    Publication: Research - peer-reviewJournal article

  7. Published

    Greenland ice cores constrain glacial atmospheric fluxes of phosphorus. / Kjær, Helle Astrid; Dallmayr, Remi; Gabrieli, Jacopo; Goto-Azuma, K.; Hirabayashi, M.; Svensson, Anders; Vallelonga, Paul Travis.

    In: Journal of Geophysical Research, Vol. 120, No. 20, 29.10.2015.

    Publication: Research - peer-reviewJournal article

  8. Published

    Greenland 2012 melt event effects on CryoSat-2 radar altimetry. / Nilsson, Johan; Vallelonga, Paul; Simonsen, Sebastian B.; Sorensen, Louise Sandberg; Forsberg, Rene; Dahl-Jensen, Dorthe; Hirabayashi, Motohiro; Goto-Azuma, Kumiko; Hvidberg, Christine S.; Kjaer, Helle A.; Satow, Kazuhide.

    In: Geophysical Research Letters (Online), Vol. 42, No. 10, 28.05.2015, p. 3919-3926.

    Publication: Research - peer-reviewJournal article

  9. Published

    On the occurrence of annual layers in Dome Fuji ice core early Holocene ice. / Svensson, A.; Fujita, S.; Bigler, M.; Braun, M.; Dallmayr, R.; Gkinis, V.; Goto-Azuma, K.; Hirabayashi, M.; Kawamura, K.; Kipfstuhl, S.; Kjaer, H. A.; Popp, T.; Simonsen, M.; Steffensen, J. P.; Vallelonga, P.; Vinther, B. M.

    In: Climate of the Past, Vol. 11, No. 9, 2015, p. 1127-1137.

    Publication: Research - peer-reviewJournal article

  10. 2014
  11. Published

    Determination of 129I in Arctic snow by a novel analytical approach using IC-ICP-SFMS. / Ezerinskis, Zilvinas; Spolaor, Andrea; Kirchgeorg, Torben; Cozzi, Giulio; Vallelonga, Paul; Kjaer, Helle A.; Sapolaite, Justina; Barbante, Carlo; Druteikiene, Ruta.

    In: Journal of Analytical Atomic Spectrometry, Vol. 29, No. 10, 10.01.2014, p. 1827-1834.

    Publication: Research - peer-reviewJournal article

  12. 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.

    Publication: Research - peer-reviewArticle in proceedings

  13. 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.

    Publication: Research - peer-reviewArticle in proceedings

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