Helle Astrid Kjær

Helle Astrid Kjær

Associate Professor

ORCID: 0000-0002-3781-9509

Publication year:
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1 - 10 out of 63Page size: 10
  1. 2024
  2. Published

    An annually resolved chronology for the Mount Brown South ice cores, East Antarctica

    Vance, T. R., Abram, N. J., Criscitiello, A. S., Crockart, C. K., Decampo, A., Favier, V., Gkinis, Vasileios, Harlan, Meg, Jackson, S. L., Kjær, Helle Astrid, Long, C. A., Nation, M. K., Plummer, C. T., Segato, D., Spolaor, A. & Vallelonga, P. T., 24 Apr 2024, In: Climate of the Past. 20, 4, p. 969-990 22 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. 2023
  4. Published

    High-resolution aerosol data from the top 3.8 kyr of the East Greenland Ice coring Project (EGRIP) ice core

    Erhardt, T., Jensen, C. M., Adolphi, F., Kjær, H. A., Dallmayr, R., Twarloh, B., Behrens, M., Hirabayashi, M., Fukuda, K., Ogata, J., Burgay, F., Scoto, F., Crotti, I., Spagnesi, A., Maffezzoli, N., Segato, D., Paleari, C., Mekhaldi, F., Muscheler, R., Darfeuil, S. & 1 others, Fischer, H., 17 Nov 2023, In: Earth System Science Data. 15, 11, p. 5079-5091 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    Antarctic evidence for an abrupt northward shift of the Southern Hemisphere westerlies at 32 ka BP

    Venugopal, A. U., Bertler, N. A. N., Severinghaus, J. P., Brook, E. J., Cortese, G., Lee, J. E., Blunier, Thomas, Mayewski, P. A., Kjær, Helle Astrid, Carter, L., Weber, M. E., Levy, R. H., Pyne, R. L. & Vandergoes, M. J., 5 Sep 2023, In: Nature Communications. 14, 1, 8 p., 5432.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Published

    Arctic mercury flux increased through the Last Glacial Termination with a warming climate

    Segato, D., Saiz-Lopez, A., Mahajan, A. S., Wang, F., Corella, J. P., Cuevas, C. A., Erhardt, T., Jensen, C. M., Zeppenfeld, C., Kjær, Helle Astrid, Turetta, C., Cairns, W. R. L., Barbante, C. & Spolaor, A., 4 May 2023, In: Nature Geoscience. 16, p. 439-445 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. 2022
  8. Published

    Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes

    Scoto, F., Sadatzki, H., Maffezzoli, N., Barbante, C., Gagliardi, A., Varin, C., Vallelonga, P., Gkinis, Vasileios, Dahl-Jensen, Dorthe, Kjær, Helle Astrid, Burgay, F., Saiz-Lopez, A., Stein, R. & Spolaor, A., 1 Nov 2022, In: Proceedings of the National Academy of Sciences of the United States of America. 119, 44, 9 p., 2203468119.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. Published

    Canadian forest fires, Icelandic volcanoes and increased local dust observed in six shallow Greenland firn cores

    Kjær, Helle Astrid, Zens, P., Black, S., Lund, K. H., Svensson, Anders & Vallelonga, P., 10 Oct 2022, In: Climate of the Past. 18, 10, p. 2211-2230 20 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Accelerating ice flow at the onset of the Northeast Greenland Ice Stream

    Grinsted, Aslak, Hvidberg, Christine Schøtt, Lilien, D. A., Rathmann, Nicholas Mossor, Karlsson, N. B., Gerber, T., Kjær, Helle Astrid, Vallelonga, P. & Dahl-Jensen, Dorthe, 23 Sep 2022, In: Nature Communications. 13, 1, 4 p., 5589.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Nanoplastics measurements in Northern and Southern polar ice

    Materic, D., Kjær, Helle Astrid, Vallelonga, P., Tison, J., Rockmann, T. & Holzinger, R., 15 May 2022, In: Environmental Research. 208, 9 p., 112741.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Melt in the Greenland EastGRIP ice core reveals Holocene warm events

    Westhoff, Julien, Sinnl, Giulia, Svensson, Anders, Freitag, J., Kjær, Helle Astrid, Vallelonga, P. T., Vinther, Bo Møllesøe, Kipfstuhl, S., Dahl-Jensen, Dorthe & Weikusat, I., 10 May 2022, In: Climate of the Past. 18, 5, p. 1011-1034 24 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    High-resolution aerosol concentration data from the Greenland NorthGRIP and NEEM deep ice cores

    Erhardt, T., Bigler, M., Federer, U., Gfeller, G., Leuenberger, D., Stowasser, O., Rothlisberger, R., Schupbach, S., Ruth, U., Twarloh, B., Wegner, A., Goto-Azuma, K., Kuramoto, T., Kjaer, H. A., Vallelonga, P. T., Siggaard-Andersen, M-L., Hansson, M. E., Benton, A. K., Fleet, L. G., Mulvaney, R. & 4 others, Thomas, E. R., Abram, N., Stocker, T. F. & Fischer, H., 16 Mar 2022, In: Earth System Science Data. 14, 3, p. 1215-1231 17 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

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ID: 33355865