Publications

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Karoff, C. & Molenda-Żakowicz et al., J. (2010). Asteroseismology of solar-type stars with Kepler: III. Ground-based data. Astronomische Nachrichten, 331(981).

Karoff, C., Metcalfe, T. S., Chaplin, W. J., Frandsen, S., Grundahl, F., Kjeldsen, H., Christensen-Dalsgaard, J., Nielsen, M. B., Frimann, S., Thygesen, A. O., Arentoft, T., Amby, T. M., Sousa, S. G. & Buzasi, D. L. (2013). Sounding stellar cycles with Kepler - II. Ground-based observations★. Royal Astronomical Society. Monthly Notices, 433(4), 3227-3238. https://doi.org/10.1093/mnras/stu2114, https://doi.org/10.1093/mnras/stt964

Karoff, C., Campante, T. L., Ballot, J., Kallinger, T., Gruberbauer, M., García, R. A., Caldwell, D. A., Christiansen, J. L. & Kinemuchi, K. (2013). Observations of Intensity Fluctuations Attributed to Granulation and Faculae on Sun-like Stars from the Kepler Mission. Astrophysical Journal, 767(1), 34. https://doi.org/10.1088/0004-637X/767/1/34

Karoff, C., Inceoglu, F., Knudsen, M. F., Olsen, J. & Fogtmann-Schulz, A. (2015). The lost sunspot cycle: New support from 10Be measurements. Astronomy & Astrophysics (A&A), 575, Article A77. https://doi.org/10.1051/0004-6361/201424927

Karoff, C. (2014). Comparison of photometric variability before and after stellar flares. Astrophysical Journal Letters, 781(1), Article L22. https://doi.org/10.1088/2041-8205/781/1/L22

Karoff, C., Knudsen, M. F., De Cat, P., Bonanno, A., Fogtmann-Schulz, A., Fu, J., Frasca, A., Inceoglu, F., Olsen, J., Zhang, Y., Hou, Y., Wang, Y. & Shi, J. (2016). Observational evidence for enhanced magnetic activity of superflare stars. Nature Communications, 7, Article 11058. https://doi.org/10.1038/ncomms11058

Karoff, C., Albrecht, S., Bonanno, A. & Knudsen, M. F. (2016). CHROMOSPHERIC EMISSION of PLANET CANDIDATE HOST STARS: A WAY to IDENTIFY FALSE POSITIVES. Astrophysical Journal Letters, 830(1), Article L7. https://doi.org/10.3847/2041-8205/830/1/L7

Karoff, C. & Svensmark, H. (2010). How did the Sun affect the climate when life evolved on the Earth? http://arxiv.org/abs/1003.6043

Karoff, C., Metcalfe, T. S., Santos, A. R. G., Montet, B. T., Isaacson, H., Witzke, V., Shapiro, A. I., Mathur, S., Davies, G. R., Lund, M. N., Garcia, R. A., Brun, A. S., Salabert, D., Avelino, P. P., van Saders, J., Egeland, R., Cunha, M. S., Campante, T. L., Chaplin, W. J. ... Knudsen, M. F. (2018). The Influence of Metallicity on Stellar Differential Rotation and Magnetic Activity. Astrophysical Journal, 852(1), Article 46. https://doi.org/10.3847/1538-4357/aaa026

Karoff, C., Jørgensen, C. S., Senthamizh Pavai, V. & Arlt, R. (2019). Christian Horrebow’s sunspot observations – II: construction of a record of sunspot positions. Solar Physics, 294(6), Article 78. https://doi.org/10.1007/s11207-019-1466-y

Karoff, C., Metcalfe, T. S., Montet, B. T., Jannsen, N. E., Santos, A. R. G., Nielsen, M. B. & Chaplin, W. J. (2019). Sounding stellar cycles with Kepler - III. Comparative analysis of chromospheric, photometric, and asteroseismic variability. Monthly Notices of the Royal Astronomical Society, 485(4), 5096-5104. https://doi.org/10.1093/mnras/stz782

Karoff, C. & Vara-Vela, A. L. (2023). Data driven analysis of atmospheric methane concentrations as function of geographic, land cover type and season. Frontiers in Earth Science, 11, Article 1119977. https://doi.org/10.3389/feart.2023.1119977

Karoff, C., Vara-Vela, A. L., Eikeland, A. Z., Knudsen, J., Cappelluti, F., Stoltenberg, M. L., Alberti, R. C. A. & Engedal, A. S. B. (2025). Remote Sensing for Quantifying Greenhouse Gas Emissions at Carbon Capture, Utilisation and Storage Facilities: A Review. Remote Sensing, 17(22), Article 3707. https://doi.org/10.3390/rs17223707

Kanstrup, M., Heinemeier, J. & Olsen, J. (2019). Kulstof 14-resultater: Knogledateringer og kronologisk forankring. In M. Løvschal, R. B. Iversen & M. K. Holst (Eds.), De dræbte krigere i Alken Enge: efterkrigsritualer i ældre jernalder (pp. 193-207). Aarhus Universitetsforlag.

Kanstrup, M., Olsen, J. & Sørensen, C. (2022). Contextualizing the presence of late bronze age millet at the arnbjerg site: investigating settlement dynamics in jutland, denmark. Poster session presented at Radiocarbon and Archaeology, Zürich, Switzerland.

Kallinger, T., De Ridder, J., Hekker, S., Mathur, S., Mosser, B., Gruberbauer, M., García, R. A., Karoff, C. & Ballot, J. (2014). The connection between stellar granulation and oscillation as seen by the Kepler mission. Astronomy & Astrophysics (A&A), 570, Article A41. https://doi.org/10.1051/0004-6361/201424313

Kaiser Kudsk, S. G., Knudsen, M. F., Karoff, C., Baittinger, C., Misios, S. & Olsen, J. (2022). Solar variability between 650 CE and 1900 - Novel insights from a global compilation of new and existing high-resolution ¹⁴C records. Quaternary Science Reviews, 292, Article 107617. https://doi.org/10.1016/j.quascirev.2022.107617

Kabath, P., Eigmüller, P., Erikson, A., Hedelt, P., Rauer, H., Titz, R., Wiese, T. & Karoff, C. (2007). Characterization of COROT target fields with BEST: Identification of periodic variable stars in the IR01 field. The Astronomical Journal, 134, 1560-1569.

Kabath, P., Eigmüller, P., Erikson, A., Hedelt, P., von Paris, P., Rauer, H., Renner, S., Titz, R. & Karoff, C. (2008). Characterization of CoRoT target fields with the Berlin Exoplanet Search Telescope: Identification of periodic variable stars in the LRa1 field. Astronomical Journal, 136(2), 654-661. https://doi.org/10.1088/0004-6256/136/2/654

Jungdal-Olesen, G., Pedersen, V. K., Andersen, J. L., Gomez, N. & Mitrovica, J. X. (2023). Sea level response to late Pliocene-Quaternary erosion and deposition in Scandinavia. Quaternary Science Reviews, 301, Article 107938. https://doi.org/10.1016/j.quascirev.2022.107938

Jungdal-Olesen, G., Andersen, J. L., Born, A. & Pedersen, V. K. (2024). The influence of glacial landscape evolution on Scandinavian ice-sheet dynamics and dimensions. Cryosphere, 18(4), 1517-1532. https://doi.org/10.5194/tc-18-1517-2024

Jungdal-Olesen, G., Piotrowski, J. A., Pedersen, V. K., Damsgaard, A., Fälber, R. & Winsemann, J. (2025). A Python modelling framework for estimating tunnel-valley erosion under former and future ice sheets. Geophysical Research Abstracts, (EGU25-5871). https://doi.org/10.5194/egusphere-egu25-5871

Jungdal-Olesen, G., Piotrowski, J. A., Pedersen, V. K., Damsgaard, A., Fälber, R. & Winsemann, J. (2024). Modelling tunnel valley erosion in northern Germany during the first ice-sheet advance (El-sterian, MIS 12) – a conceptual model and preliminary results. Abstract from DEUQUA, Salzburg, Austria.

Jørgensen, C. S., Karoff, C., Senthamizh Pavai, V. & Arlt, R. (2019). Christian Horrebow’s Sunspot Observations – I. Life and Published Writings. Solar Physics, 294(6), Article 77. https://doi.org/10.1007/s11207-019-1465-z

Jørgensen, A. E. M., Schjerling, P., Krogsgaard, M. R., Petersen, M. M., Olsen, J., Kjær, M. & Heinemeier, K. M. (2021). Collagen Growth Pattern in Human Articular Cartilage of the Knee. Cartilage, 13(2_suppl), 408S-418S . https://doi.org/10.1177/1947603520971016

Jørgensen, P. R., Krogh, P. H., Qin, J., Modesti, L., Nielsen, I. B., Seersholm, F., Wagner, N., Hansen, A. J., Olsen, J., Strobel, B. W., Hansen, S., Gudbjerg, J., Petersen, C. T., Lacoste, M., Cousin, I., Keaveney, E. & Barrett, G. (2022). Ancient Root Macropores and Fractures in Glacial till and Their Contribution to Pesticide Vulnerability of Groundwater in Low and High‐ground Agricultural Landscapes ‐: PESTPORE2. The Danish Environmental Protection Agency. Bekæmpelsesmiddelforskning fra Miljøstyrelsen No. 207 https://www2.mst.dk/Udgiv/publications/2022/01/978-87-7038-376-9.pdf

Johansen, A. S., Hansen, T. M. & Fabricius, I. L. (2013). Rock physics based non-linear AVO waveform inversion of North Sea greensand. In SEG Technical Program Expanded Abstracts 2013 (pp. 3139-3143). Society of Exploration Geophysicists. https://doi.org/10.1190/segam2013-0834.1

Jóhannsson, Ó. D. & Hansen, T. M. (2018). Accelerating Multiple-Point Geostatistical Simulation with GPU. Abstract from 80th EAGE Conference and Exhibition, Copenhagen, Denmark. https://doi.org/10.3997/2214-4609.201801725

Jóhannsson, Ó. D. & Hansen, T. M. (2021). Estimation using multiple-point statistics. Computers and Geosciences, 156, Article 104894. https://doi.org/10.1016/j.cageo.2021.104894

Jóhannsson, Ó. D. & Hansen, T. M. (2023). Multiple-point statistics and non-colocational soft data integration. Computers and Geosciences, 172, Article 105280. https://doi.org/10.1016/j.cageo.2022.105280

Jiang, C., Jiang, B. W., Christensen-Dalsgaard, J., Bedding, T. R., Stello, D., Huber, D., Frandsen, S., Kjeldsen, H., Karoff, C., Mosser, B., Demarque, P., Fanelli, M. N., Kinemuchi, K. & Mullally, F. (2011). Modeling Kepler Observations of Solar-like Oscillations in the Red Giant Star HD 186355. Astrophysical Journal, 742(2), Article id. 120. https://doi.org/10.1088/0004-637X/742/2/120

Jiang, H., Knudsen, M. F., Seidenkrantz, M.-S., Zhao, M., Sha, L. & Ran, L. (2014). Diatom-based reconstruction of summer sea-surface salinity in the South China Sea over the last 15000 years. Boreas, 43(1), 208-219. https://doi.org/10.1111/bor.12031

Jiang, H., Muscheler, R., Björck, S., Seidenkrantz, M.-S., Olsen, J., Sha, L., Sjolte, J., Eiríksson, J., Ran, L., Knudsen, K. L. & Knudsen, M. F. (2015). Solar forcing of Holocene summer sea-surface temperatures in the northern North Atlantic. Geology, 43(3), 203-206. https://doi.org/10.1130/G36377.1

Jessen, C. A., Pedersen, K. B., Christensen, C., Olsen, J., Mortensen, M. F. & Hansen, K. M. (2015). Early Maglemosian culture in the Preboreal landscape: Archaeology and vegetation from the earliest Mesolithic site in Denmark at Lundby Mose, Sjælland. Quaternary International, 378, 73-87. https://doi.org/10.1016/j.quaint.2014.03.056

Jensen, T. Z. T., Mackie, M., Taurozzi, A. J., Lanigan, L. T., Gundelach, C., Olsen, J., Sørensen, S. A., Collins, M. J., Sørensen, M. & Schroeder, H. (2020). The biomolecular characterization of a finger ring contextually dated to the emergence of the Early Neolithic from Syltholm, Denmark. Royal Society Open Science, 7(1), Article 191172. https://doi.org/10.1098/rsos.191172

Jensen, T. Z. T., Sjöström, A., Fischer, A., Rosengren, E., Lanigan, L. T., Bennike, O., Richter, K. K., Gron, K. J., Mackie, M., Mortensen, M. F., Sørensen, L., Chivall, D., Iversen, K. H., Taurozzi, A. J., Olsen, J., Schroeder, H., Milner, N., Sørensen, M. & Collins, M. J. (2020). An integrated analysis of Maglemose bone points reframes the Early Mesolithic of Southern Scandinavia. Scientific Reports, 10(1), Article 17244. https://doi.org/10.1038/s41598-020-74258-8

Jensen, B. B., Hansen, T. M., Nielsen, L., Cordua, K. S., Tuxen, N., Tsitonaki, A. & Looms, M. C. (2022). Accounting for Modeling Errors in Linear Inversion of Crosshole Ground-Penetrating Radar Amplitude Data: Detecting Sand in Clayey Till. Journal of Geophysical Research: Solid Earth, 127(10), Article e2022JB024666. https://doi.org/10.1029/2022JB024666

Jensen, B. B., Rosenberg, L., Tsitonaki, A., Tuxen, N., Bjerg, P. L., Nielsen, L., Hansen, T. M. & Looms, M. C. (2023). High-Resolution Geological Information from Crosshole Ground Penetrating Radar in Clayey Tills. Groundwater Monitoring and Remediation, 43(4), 55-66. https://doi.org/10.1111/gwmr.12588

Jansen, J. D., Knudsen, M. F., Andersen, J. L., Heyman, J. & Egholm, D. L. (2019). Erosion rates in Fennoscandia during the past million years. Quaternary Science Reviews, 207, 37-48. https://doi.org/10.1016/j.quascirev.2019.01.010

Iregren, E., Jungner, H., Olsen, J., Kanstrup, M. & Heinemeier, J. (2025). Dateringen av Västerhus kyrkogård på Frösön i Jämtland En djupanalys av isotopvärden och dateringar av fisk, däggdjur och människor. Fornvannen, 120(2), 23.

Inceoglu, F., Knudsen, M. F., Karoff, C. & Olsen, J. (2014). Modeling the Relationship Between Neutron Counting Rates and Sunspot Numbers Using the Hysteresis Effect. Solar Physics, 289(4), 1387-1402. https://doi.org/10.1007/s11207-013-0391-8

Inceoglu, F., Simoniello, R., Knudsen, M. F., Karoff, C., Olsen, J. & Jacobsen, B. H. (2014). The occurrence and characteristics of grand solar minima and maxima during the Holocene epoch. Abstract from EGU General Assembly 2014, Vienna, Austria. http://meetingorganizer.copernicus.org/EGU2014/EGU2014-13597.pdf

Inceoglu, F., Simoniello, R., Knudsen, M. F., Karoff, C., Olsen, J. & Turck-Chiéze, S. (2016). On the Current Solar Magnetic Activity in the Light of Its Behaviour During the Holocene. Solar Physics, 291(1), 303-315. https://doi.org/10.1007%2Fs11207-015-0805-x

Inceoglu, F., Knudsen, M. F., Karoff, C. & Olsen, J. (2014). Reconstruction of Subdecadal Changes in Sunspot Numbers Based on the NGRIP ¹⁰Be Record. Solar Physics, 289(11), 4377-4392. https://doi.org/10.1007/s11207-014-0563-1