Research output per year
Research output per year
Personal profile
Short presentation
Impurities in ice cores can inform on a variety of climate processes such as atmospheric transport, volcanic eruptions, sea ice and many others. I have 9 years of experience analyzing ice cores for the content of impurities by means of Continuous Flow Analysis (CFA). I have participated in 6 measurement campaigns on deep ice cores from the two hemispheres and several shallower. I have organized a number of CFA campaigns and created new CFA methods (acid, phosphorus). I have Greenland ice sheet field experience (9 months
over 6 seasons), and an established international network and host annually a PhD school on ice core analysis and techniques.
External positions
Danish Institute for Studying abroad (DIS)
1 Aug 2014 → 1 Jun 2015
Keywords
- Faculty of Science
- ice core
- Continuous Flow Analysis (CFA)
- ice2ice
Collaborations and top research areas from the last five years
Recent external collaboration on country/territory level. Dive into details by clicking on the dots or
Research output
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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, V., Harlan, M., Jackson, S. L., Kjær, H. A., 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
Open AccessFile2 Citations (Scopus)13 Downloads (Pure) -
An East Antarctic, sub-annual resolution water isotope record from the Mount Brown South Ice core
Gkinis, V., Jackson, S., Abram, N. J., Plummer, C., Blunier, T., Harlan, M., Kjær, H. A., Moy, A. D., Peensoo, K. M., Quistgaard, T., Svensson, A. & Vance, T. R., 10 Sept 2024, In: Scientific Data. 11, 1, 16 p., 986.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile8 Downloads (Pure) -
The Greenland spatial fingerprint of Dansgaard–Oeschger events in observations and models
Buizert, C., Sowers, T. A., Niezgoda, K., Blunier, T., Gkinis, V., Harlan, M., He, C., Jones, T. R., Kjaer, H. A., Liisberg, J. B., Menking, J. A., Morris, V., Noone, D., Rasmussen, S. O., Sime, L. C., Steffensen, J. P., Svensson, A., Vaughn, B. H., Vinther, B. M. & White, J. W. C., 21 Oct 2024, In: Proceedings of the National Academy of Sciences of the United States of America. 121, 44, 9 p., e2402637121.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile1 Citation (Scopus)11 Downloads (Pure) -
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, T., Mayewski, P. A., Kjær, H. A., Carter, L., Weber, M. E., Levy, R. H., Pyne, R. L. & Vandergoes, M. J., 5 Sept 2023, In: Nature Communications. 14, 1, 8 p., 5432.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile2 Citations (Scopus)39 Downloads (Pure) -
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., Kjaer, H. A., 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
File7 Citations (Scopus)1 Downloads (Pure) -
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, , 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
Open AccessFile6 Citations (Scopus)21 Downloads (Pure) -
Accelerating ice flow at the onset of the Northeast Greenland Ice Stream
Grinsted, A., Hvidberg, C. S., Lilien, D. A., Rathmann, N. M., Karlsson, N. B., Gerber, T., Kjaer, H. A., Vallelonga, P. & Dahl-Jensen, D., 23 Sept 2022, In: Nature Communications. 13, 1, 4 p., 5589.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile15 Citations (Scopus)42 Downloads (Pure) -
Canadian forest fires, Icelandic volcanoes and increased local dust observed in six shallow Greenland firn cores
Kjaer, H. A., Zens, P., Black, S., Lund, K. H., Svensson, A. & 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
Open AccessFile9 Citations (Scopus)38 Downloads (Pure)
Activities
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Visit at the Desert Research Institute (DRI), Reno, Nevada, USA
Kjær, H. A. (Participant)
Sept 2015 → Oct 2016Activity: Other activity types › Other (prizes, external teaching and other activities) - Period visiting other institutions
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Visit at National Institute for Polar Research (NIPR), Tokyo, Japan
Kjær, H. A. (Participant)
Oct 2013 → Dec 2013Activity: Other activity types › Other (prizes, external teaching and other activities) - Period visiting other institutions
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Visit at GNS Science, Wellington, New Zealand
Kjær, H. A. (Participant)
Jun 2013 → Jul 2013Activity: Other activity types › Other (prizes, external teaching and other activities) - Period visiting other institutions
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Folkeuniversitets foredrag (FOF)
Kjær, H. A. (Lecturer)
Nov 2012Activity: Talk or presentation types › Lecture and oral contribution
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International partnerships in Ice core sciences (IPICS)
Kjær, H. A. (Participant)
1 Oct 2012 → 5 Oct 2012Activity: Participating in an event - types › Organisation of and participation in conference
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PhD workshop at the polar science center
Kjær, H. A. (Participant)
28 Sept 2012Activity: Participating in an event - types › Participation in workshop, seminar, course
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Folkeuniversitets foredrag (FOF)
Kjær, H. A. (Lecturer)
Apr 2012Activity: Talk or presentation types › Lecture and oral contribution
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Visit at Dessert Ressearch Institute (DRI), Reno, Nevada, USA
Kjær, H. A. (Participant)
1 Feb 2012 → 28 Feb 2012Activity: Other activity types › Other (prizes, external teaching and other activities) - Period visiting other institutions
Press/Media
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Kæmpe klimajoker: Indlandsisen er utæt: Kæmpe ismasser er i bevægelse i Grønland. Isstrømmene spyr isbjerge ud i havet og får vandstanden til at stige - med en uforudsigelig hastighed.
02/06/2016
1 Media contribution
Press/Media: Press / Media
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The Greenland ice sheet contains nutrients from precipitation
04/11/2015
1 Media contribution
Press/Media: Press / Media
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The Greenland Ice Sheet Contains Nutrients from Precipitation
04/11/2015
1 Media contribution
Press/Media: Press / Media
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