Research output per year
Research output per year
Personal profile
Short presentation
Ice cores offer an unique archive for past climate and environment. I develop methods for the continuous detection (CFA) of chemicals in ice cores. I have amongst others developed a method for the continuous detection of dissolved reactive phosphorus and a method for the continuous detection of pH in ice.
Currently my position is within the ERC funded ice2ice project. The project is on how sea ice and land ice effect each other. My contribution is CFA analysis of the new Greenland "ReCAP" ice core to try and inform on past climate variability, especially using sea ice proxies.
Outreach to the general public is a very important to me. I give several lectures on weather, climate change and ice cores for visiting high school students, university students and coming teachers every year. Furthermore I update the ice2ice project homepage: www.ice2ice.eu
I use my analytic science skills in combination with a lot of travel activity visiting institutions doing high quality ice core climate research such as the Desert Research Institute, Reno, Nevada, USA and the National Institute for polar research, Tokyo, Japan as well as the Antarctic Research Centre, Victoria University of Wellington, New Zealand, not to mention out close collaboration with University of Bergen and UniReserach in Norway as part of ice2ice.
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
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- 6 Similar Profiles
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
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A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica
Winstrup, M., Vallelonga, P., Kjaer, H. A., Fudge, T. J., Lee, J. E., Riis, M. H., Edwards, R., Bertler, N. A. N., Blunier, T., Brook, E. J., Buizert, C., Ciobanu, G., Conway, H., Dahl-Jensen, D., Ellis, A., Emanuelsson, B. D., Hindmarsh, R. C. A., Keller, E. D., Kurbatov, A. V. & Mayewski, P. A. & 7 others, , 10 Apr 2019, In: Climate of the Past. 15, 2, p. 751-779 29 p.Research output: Contribution to journal › Journal article › Research › peer-review
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East Greenland ice core dust record reveals timing of Greenland ice sheet advance and retreat.
Simonsen, M. F., Baccolo, G., Blunier, T., Borunda, A., Delmonte, B., Frei, R., Goldstein, S., Grinsted, A., Kjær, H. A., Sowers, T. A., Svensson, A., Vinther, B. M., Vladimirova, D., Winckler, G., Winstrup, M. & Vallelonga, P. T., 1 Dec 2019, In: Nature Communications. 10, 8 p., 4494.Research output: Contribution to journal › Journal article › Research › peer-review
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Afslørende kemi i Grønlands og Antarktis' iskerner
Svensson, A. & Kjær, H. A., 1 Jun 2018, In: Dansk Kemi. 9, p. 18-21 3 p.Research output: Contribution to journal › Journal article › Research › peer-review
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A novel approach to process brittle ice for continuous flow analysis of stable water isotopes
Pyne, R. L., Keller, E. D., Canessa, S., Bertler, N. A., Pyne, A. R., Pyne, A. R., Mandeno, D., Vallelonga, P. T., Semper, S., Kjær, H. A., Hutchison, E. & Baisden, W. T., 1 Apr 2018, In: Journal of Glaciology. 64, 243, p. 1-11Research output: Contribution to journal › Journal article › Research › peer-review
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Greenland records of aerosol source and atmospheric lifetime changes from the Eemian to the Holocene
Schupbach, S., Fischer, H., Bigler, M., Erhardt, T., Gfeller, G., Leuenberger, D., Mini, O., Mulvaney, R., Abram, N. J., Fleet, L., Frey, M. M., Thomas, E., Svensson, A., Dahl-Jensen, D., Kettner, E., Kjaer, H., Seierstad, I., Steffensen, J. P., Rasmussen, S. O. & Vallelonga, P. & 30 others, , 1 Dec 2018, In: Nature Communications. 9, 1476.Research output: Contribution to journal › Journal article › Research › peer-review
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Laboratory supervision of MSc projects -Qualitative interviews, thematic analysis, and recommendations for the supervisor
Kjær, H. A., 23 May 2018, Improving University Science Teaching and Learning Pedagogical Projects 2018. Institut for Naturfagenes Didaktik ed. København, Danmark: Københavns Universitet, Vol. 12. p. 91-105 (Improving University Science Teaching and Learning - Pedagogical Projects).Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Education
64 Downloads (Pure) -
Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities
George, T. S., Giles, C. D., Menezes-Blackburn, D., Condron, L. M., Gama-Rodrigues, A. C., Jaisi, D., Lang, F., Neal, A. L., Stutter, M. I., Almeida, D. S., Bol, R., Cabugao, K. G., Celi, L., Cotner, J. B., Krueger, J., Plassard, C., Rosling, A., Darch, T., Fraser, T. & Tamburini, F. & 30 others, , Jun 2018, In: Plant and Soil. 427, 1-2, SI, p. 209-211Research output: Contribution to journal › Journal article › Research › peer-review
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Particle shape accounts for instrumental discrepancy in ice core dust size distributions
Simonsen, M. F., Cremonesi, L., Baccolo, G., Bosch, S., Delmonte, B., Erhardt, T., Kjaer, H. A., Potenza, M., Svensson, A. & Vallelonga, P., 3 May 2018, In: Climate of the Past. 14, 5, p. 601-608Research output: Contribution to journal › Journal article › Research › peer-review
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 or organising 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 or organising 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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Datasets
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Four approaches leading to the age scale of the Young Island ice core
Moser, D. (Creator), Thomas, E. (Creator), Moser, D. (Contributor), Moser, D. (Contributor), Thomas, E. (Contributor), Tetzner, D. (Contributor), Segato, D. (Contributor), Spolaor, A. (Contributor), Kjaer, H. (Contributor), Markle, B. (Contributor), Pedro, J. (Contributor), Jackson, S. (Contributor), Ngoumtsa, E. (Contributor), Vallelonga, P. (Contributor), Centre, U. P. D. (Contributor), Centre, U. P. D. (Contributor) & Centre, U. P. D. (Contributor), NERC EDS UK Polar Data Centre, 2021
DOI: 10.5285/8b60d15f-c8a5-4178-b7c2-0fef4a2717d2, https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01586
Dataset
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Policy Brief: Key findings and recommendations from three H2020 Projects on Tipping Points: TiPES, COMFORT, and TiPACCs
Rusiecka, D. (Creator), Martins, H. (Creator), Boers, N. (Creator), Kjær, H. A. (Creator), Langebroek, P. (Creator), Dy, C. L. (Creator), Heinze, C. (Creator), Blenckner, T. (Creator), Ditlevsen, P. (Creator) & Østerhus, S. (Creator), Zenodo, 2022
DOI: 10.5281/zenodo.6577027, https://zenodo.org/records/6577027
Dataset
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Dataset for "Arctic mercury increased through the Last Glacial Termination with a warming climate"
Segato, D. (Creator), Saiz-Lopez, A. (Creator), Mahajan, A. S. (Creator), Wang, F. (Creator), Corella, J. P. (Creator), Cuevas, C. A. (Creator), Erhardt, T. (Creator), Jensen, C. M. (Creator), Zeppenfeld, C. (Creator), Kjær, H. A. (Creator), Turetta, C. (Creator), Cairns, W. R. L. (Creator), Barbante, C. (Creator) & Spolaor, A. (Creator), Zenodo, 2023
DOI: 10.5281/zenodo.7754371, https://zenodo.org/records/7754371
Dataset
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The SUMup collaborative database: Surface mass balance, subsurface temperature and density measurements from the Greenland and Antarctic ice sheets (2024 release)
Vandecrux, B. (Creator), Amory, C. (Creator), Ahlstrøm, A. P. (Creator), Akers, P. D. (Creator), Albert, M. (Creator), Alley, R. B. (Creator), Alves De Castro, M. (Creator), Arnaud, L. (Creator), Baker, I. (Creator), Bales, R. (Creator), Benson, C. (Creator), Box, J. E. (Creator), Brucker, L. (Creator), Buizert, C. (Creator), Chandler, D. (Creator), Charalampidis, C. (Creator), Cherblanc, C. (Creator), Clerx, N. (Creator), Colgan, W. (Creator), Covi, F. (Creator), Dattler, M. (Creator), Denis, G. (Creator), Derksen, C. (Creator), Dibb, J. E. (Creator), Ding, M. (Creator), Dixon, D. (Creator), Eisen, O. (Creator), Fahrner, D. (Creator), Fausto, R. (Creator), Favier, V. (Creator), Fernandoy, F. (Creator), Freitag, J. (Creator), Gerland, S. (Creator), Harper, J. (Creator), Hawley, R. L. (Creator), Heuer, J. (Creator), Hock, R. (Creator), Hou, S. (Creator), How, P. (Creator), Humphrey, N. (Creator), Hubbard, B. (Creator), Iizuka, Y. (Creator), Isaksson, E. (Creator), Kameda, T. (Creator), Karlsson, N. B. (Creator), Kawakami, K. (Creator), Kjær, H. A. (Creator), Kreutz, K. (Creator), Kuipers Munneke, P. (Creator), Lazzara, M. (Creator), Lemeur, E. (Creator), Lenaerts, J. T. M. (Creator), Lewis, G. (Creator), Lindau, F. G. L. (Creator), Lindsey-Clark, J. (Creator), MacFerrin, M. (Creator), Machguth, H. (Creator), Magand, O. (Creator), Mankoff, K. D. (Creator), Marquetto, L. (Creator), Martinerie, P. (Creator), McConnell, J. R. (Creator), Medley, B. (Creator), Miège, C. (Creator), Miles, K. E. (Creator), Miller, O. (Creator), Miller, H. (Creator), Montgomery, L. (Creator), Morris, E. (Creator), Mosley-Thompson, E. (Creator), Mulvaney, R. (Creator), Niwano, M. (Creator), Oerter, H. (Creator), Osterberg, E. (Creator), Otosaka, I. (Creator), Picard, G. (Creator), Polashenski, C. (Creator), Reijmer, C. (Creator), Rennermalm, A. (Creator), Rutishauser, A. (Creator), Scanlan, K. (Creator), Simoes, J. C. (Creator), Simonsen, S. B. (Creator), Smeets, P. C. J. P. (Creator), Smith, A. (Creator), Solgaard, A. (Creator), Spencer, M. (Creator), Steen-Larsen, H. C. (Creator), Stevens, C. M. (Creator), Sugiyama, S. (Creator), Svensson, J. (Creator), Tedesco, M. (Creator), Thomas, E. (Creator), Thompson-Munson, M. (Creator), Tsutaki, S. (Creator), Van As, D. (Creator), Van Den Broeke, M. R. (Creator), Van Tiggelen, M. (Creator), Wang, Y. (Creator), Wilhelms, F. (Creator), Winstrup, M. (Creator), Xiao, J. (Creator) & Xiao, C. (Creator), NSF Arctic Data Center, 2024
DOI: 10.18739/a2m61br5m, https://arcticdata.io/catalog/view/doi:10.18739/A2M61BR5M
Dataset