Basal meltwater from the Greenland ice sheet. Scientific figure.

Karlsson et al., 2021

Subglacial water fluxes

Graph showing accumulation rates as function of distance

Karlsson et al., 2020

Past accumulation rates

See also

My GEUS publication profile
My Google Scholar profile

Pre-prints (in review)

Rutishauser, A., Scanlan, K. M., Vandecrux, B., Karlsson, N. B., Jullien, N., Ahlstrøm, A. P., Fausto, R. S., & How, P. Mapping the vertical heterogeneity of Greenland’s firn from 2011–2019 using airborne radar and laser altimetry. The Cryosphere. IN REVIEW.

Karlsson, N. B., Schroeder, D. M, Sørensen, L. S., Chu, W., Dall, J., Andersen, N. H., Dobson, R., Mackie, E. J., Köhn, S. J., Steinmetz, J. E., Tarzona, A. S, Teisberg, T. O., & Skou, N. A Newly Digitised Ice-penetrating Radar Data Set Acquired over the Greenland Ice Sheet in 1971-1979. Earth System Science DataIN REVIEW.

Poulsen, E., Rysgaard, S., Hansen, K., Karlsson, N. B. Uncrewed aerial vehicle with onboard winch system for rapid, cost-effective, and safe oceanographic profiling in hazardous and inaccessible areas. HardwareX. ACCEPTED.


Andresen, C. S., Karlsson, N. B., Straneo, F., Schmidt, S., Andersen, T. J., Eidam, E. F., Bjørk, A. A.,  Dartiguemalle, N., Dyke, L. M., Vermassen, F. & Gundel, I. E. Sediment discharge from Greenland’s marine-terminating glaciers is linked with surface melt. Nature Communications 15, 1332. doi:

Sørensen, L. S., Bahbah R., Simonsen, S. B., Andersen, N. H., Bowling, J., Gourmelen, N., Horton, A., Karlsson, N. B., Leeson, A., Maddalena, J., McMillan, M., Solgaard, A. M., & Birgit Wessel. Improved Monitoring of Subglacial Lake Activity in Greenland. The Cryosphere, 18 (2), 505-523. doi: 10.5194/tc-2022-263.


Vandecrux, B., Box, J. E., Ahlstrøm, A. P., Andersen, S. B., Bayou, N., Colgan, W. T., Cullen, N. J., Fausto, R. S., Haas-Artho, D., Heilig, A., Houtz, D. A., How, P., Enescu, I. I., Karlsson, N. B., Buchholz, R. K., Mankoff, K. D., McGrath, D., Molotch, N. P., Perren, B., Revheim, M. K., Rutishauser, A., Sampson, K., Schneebeli, M., Starkweather, S., Steffen, S., Weber, J., Wright, P. J., Zwally, H. J., Steffen, K. (2023). The historical Greenland Climate Network (GC-Net) curated and augmented level-1 dataset. Earth System Science Data, 15(12), 5467-5489. doi: 10.5194/essd-15-5467-2023

Løkkegaard, A., Mankoff, K. D., Zdanowicz, C., Clow, G. D., Lüthi, M. P., Doyle, S. H., Thomsen, H. H., Fisher, D., Harper, J., Aschwanden, A., Vinther, B. M., Dahl-Jensen, D., Zekollari, H., Meierbachtol, T., McDowell, I., Humphrey, N., Solgaard, A., Karlsson, N. B., Khan, S. A., Benjamin Hills, Robert Law, Bryn Hubbard, Poul Christoffersen, Mylène Jacquemart, Julien Seguinot, Robert S. Fausto, & Colgan, W. T. (2023). Greenland and Canadian Arctic ice temperature profiles database. Cryosphere, 17(9), 3829-3845. doi: 10.5194/tc-2022-138.

Colgan, W., Shields, C., Talalay, P., Fan, X., Lines, A. P., Elliott, J., Rajaram, H., Mankoff, K., Jensen, M., Backes, M., Liu, Y., Wei, X., Karlsson, N. B., Spanggård, H., & Pedersen, A. Ø. (2023). Design and performance of the Hotrod melt-tip ice-drilling system. Geoscientific Instrumentation, Methods and Data Systems, 12(2), 121-140. doi: 10.5194/gi-2022-18.

Colgan, W., Jakobsen, J., Solgaard, A., Løkkegaard, A., Abermann, J., Khan, S. A., Csatho, B., MacGregor, J. A., Fausto, R. S., Karlsson, N., Pedersen, A. Ø., Andersen, S. B., Sonntag, J., Hvidberg, C. S., & Ahlstrom, A. P. (2023). Sixty years of ice form and flow at Camp Century, Greenland. Journal of Glaciology, 69(276), 919-929.

Jullien, N., Tedstone, A. J., Machguth, H., Karlsson, N. B., & Helm, V. (2023). Greenland Ice Sheet ice slab expansion and thickening. Geophysical Research Letters, 50(10).

Karlsson, N. B., Mankoff, K. D., Solgaard, A. M., Larsen, S. H., How, P. R., Fausto, R. S., & Sørensen, L. S. (2023). A data set of monthly freshwater fluxes from the Greenland ice sheet’s marine-terminating glaciers on a glacier–basin scale 2010–2020. GEUS Bulletin, 53, Article 8338.

Larsen, S. H., Ahlstrøm, A. P., Karlsson, N. B., Kusk, A., Langen, P. L., & Hvidberg, C. S. (2023). Outlet glacier flow response to surface melt: based on analysis of a high-resolution satellite data set. Journal of Glaciology, 69(276), 1047-1055. doi:10.1017/jog.2022.124.

Sixty years of ice form and flow at Camp Century, Greenland.
Colgan, W., Jakobsen, J., Solgaard, A., Løkkegaard, A., Abermann, J., Khan, S., Csatho, B., MacGregor, J. A., Fausto, R. F., Karlsson, N. B., Pedersen, A. Ø., Andersen, S. B., Sonntag, J., Hvidberg, C. S., Ahlstrøm, A.
Journal of Glaciology, 1-11. doi:10.1017/jog.2022.112


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., Kjær, H. A., Vallelonga, P. and Dahl-Jensen, D.
Nature Communications vol. 13, doi: 10.1038/s41467-022-32999-2.

GBaTSv2: a revised synthesis of the likely basal thermal state of the Greenland Ice Sheet.
MacGregor, J. A., Chu, W., Colgan, W. T., Fahnestock, M. A., Felikson, D., Karlsson, N. B., Nowicki, S. M. J., and Studinger, M.
The Cryosphere, 16, 3033–3049, doi:10.5194/tc-16-3033-2022.

Greenland Geothermal Heat Flow Database and Map (Version 1).
Colgan, W., Wansing, A., Mankoff, K., Lösing, M., Hopper, J., Louden, K., Ebbing, J., Christiansen, F. G., Ingeman-Nielsen, T., Liljedahl, L. C., MacGregor, J. A., Hjartarson, Á., Bernstein, S., Karlsson, N. B., Fuchs, S., Hartikainen, J., Liakka, J., Fausto, R., Dahl-Jensen, D., Bjørk, A., Naslund, J.-O., Mørk, F., Martos, Y., Balling, N., Funck, T., Kjeldsen, K. K., Petersen, D., Gregersen, U., Dam, G., Nielsen, T., Khan, A., Løkkegaard, A.
Earth System Science Data. 14, 5, p. 2209-2238 doi: 10.5194/essd-14-2209-2022

Planetary polar explorer – the case for a next-generation remote sensing mission to low Mars orbit.
Oberst, J., Wickhusen, K., Gwinner, K., Hauber, E., Stark, A., Elgner, S., Grott, M., Fanara, L., Hussmann, H., Steinbrügge, G., Lewis, S., Balme, M., Maugeri, M., Diolaiuti, G., Karlsson, N. Johnsson, A., Ivanov A. and Hiesinger, H.
Experimental Astronomy (2022). doi: 10.1007/s10686-021-09820-x.

Basal stress controls ice-flow variability during a surge cycle of Hagen Bræ, Greenland.
Winton, Ø. A., Simonsen, S. B., Solgaard, A. M., McNabb, R., & Karlsson, N. B.
Journal of Glaciology, 68 (269), 503-517. doi: 10.1017/jog.2021.111.


A first constraint on basal melt-water production of the Greenland ice sheet.
Karlsson, N. B., Solgaard, A. M., Mankoff, K. D., Gillet-Chaulet, F., MacGregor, J. A., Box, J. E., Citterio, M., Colgan, W. T., Larsen, S. H., Kjeldsen, K. K., Korsgaard, N. J., Benn, D. I., Hewitt, I. J., & Fausto, R. S.
Nature Communications, 12(1), [3461]. doi: 10.1038/s41467-021-23739-z

Greenland ice sheet mass balance from 1840 through next week.
Mankoff, K. D., Fettweis, X., Langen, P. L., Stendel, M., Kjeldsen, K. K., Karlsson, N. B., Noël, B., van den Broeke, M. R., Solgaard, A., Colgan, W., Box, J. E., Simonsen, S. B., King, M. D., Ahlstrøm, A. P., Andersen, S. B., & Fausto, R. S.
Earth System Science Data, 13(10), 5001-5025. doi: 10.5194/essd-13-5001-2021

Programme for Monitoring of the Greenland Ice Sheet (PROMICE) automatic weather station data.
Fausto, R. S., Van As, D., Mankoff, K. D., Vandecrux, B., Citterio, M., Ahlstrøm, A. P., Andersen, S. B., Colgan, W., Karlsson, N. B., Kjeldsen, K. K., Korsgaard, N. J., Larsen, S. H., Nielsen, S., Pedersen, A., Shields, C. L., Solgaard, A. M., & Box, J. E.
Earth System Science Data, 13(8), 3819-3845. doi: 10.5194/essd-13-3819-2021.

Greenland ice velocity maps from the PROMICE project.
Solgaard, A., Kusk, A., Boncori, J. P. M., Dall, J., Mankoff, K. D., Ahlstrøm, A. P., Andersen, S. B., Citterio, M., Karlsson, N. B., Kjeldsen, K. K., Korsgaard, N. J., Larsen, S. H., & Fausto, R. S.
Earth System Science Data, 13(7), 3491-3512. doi: 10.5194/essd-13-3491-2021.

Firn evolution at Camp Century, Greenland: 1966–2100.
Vandecrux, B., Colgan, W., Solgaard, A. M., Steffensen, J. P., & Karlsson, N. B.
Frontiers in Earth Science, 9, [578978]. 10.3389/feart.2021.578978.

Erratum: Five decades of radioglaciology
Schroeder, D. M., Bingham, R. G., Blankenship, D. D., Christianson, K., Eisen, O., Flowers, G. E., Karlsson, N. B., Koutnik, M. R., Paden, J. D., & Siegert, M. J.
Annals of Glaciology. doi: 10.1017/aog.2021.14

Age‐Depth Stratigraphy of Pine Island Glacier Inferred from Airborne Radar and Ice‐Core Chronology
Bodart, J. A., Bingham, R. G., Ashmore, D. W., KARLSSON, N. B., Hein, A.S., & Vaughan, D. G.
Journal of Geophysical Research: Earth Surface, 126. doi: 10.1029/2020JF005927

Cryoegg: development and field trials of a wireless subglacial probe for deep, fast-moving ice.
Prior-Jones, M., E. Bagshaw, J. Lees, L. Clare, S. Burrow, M. A. Werder, N. B. KARLSSON, D. Dahl-Jensen, T. R. Chudley, P. Christoffersen, J. L. Wadham, S. H. Doyle, B. Hubbard.
Journal of Glaciology, 1-14. doi: 10.1017/jog.2021.16.


A first chronology for the East GReenland Ice-core Project (EGRIP) over the Holocene and last glacial termination. Mojtabavi, S., Wilhelms, F., Cook, E., Davies, S., Sinnl, G., Skov Jensen, M., Dahl-Jensen, D., Svensson, A., Vinther, B., Kipfstuhl, S., Jones, G., KARLSSON, N. B., Faria, S. H., Gkinis, V., Kjær, H., Erhardt, T., Berben, S. M. P., Nisancioglu, K. H., Koldtoft, I., and Rasmussen, S. O.: Climate of the Past,, 16 (6), 2359-2380.

Surface velocity of the Northeast Greenland Ice Stream (NEGIS): Assessment of interior velocities derived from satellite data by GPS.
Hvidberg, C. S., A. Grinsted, D. Dahl-Jensen, S. A. Khan, A. K., J. K. Andersen, N. Neckel, A. Solgaard, N. B. KARLSSON, H. A. Kjær, P. Vallelonga.
The Cryosphere, 14, 3487–3502 DOI: 10.5194/tc-14-3487-2020.

Surface accumulation in Northern Central Greenland during the last 300 years.
KARLSSON, N., Razik, S., Hörhold, M., Winter, A., Steinhage, D., Binder, T., and Eisen, O.
Annals of Glaciology, 2020, 1-11. DOI:10.1017/aog.2020.30.

Five decades of radioglaciology.
Schroeder, D. M., Bingham, R. G., Blankenship, D. D., Christianson, K., Eisen, O., Flowers, G. E., KARLSSON, N. B., Koutnik, M. R., Paden, J. D. and Siegert, M. J.
Annals of Glaciology, 2020, 1-13. DOI:10.1017/aog.2020.11

Hagen Bræ: A surging glacier in North Greenland – 35 years of observations.
Solgaard, A. M., Simonsen, S. B., Grinsted, A., Mottram, R., KARLSSON, N. B.,  Hansen, K., Kusk, A., Sørensen, L. S.
Geophysical Research Letters. 2020. DOI: 10.1029/2019GL085802


Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet.
Morlighem et al.
Nature Geoscience. doi: 10.1038/s41561-019-0510-8

Linear flow modelling of a Martian Lobate Debris Apron.
Schmidt, L. S., Hvidberg, C., S. Kim, J. R. and KARLSSON, N. B.
Journal of Glaciology. doi: 10.1017/jog.2019.54. 2019.

Greenland ice sheet mass balance assessed by PROMICE (1995–2015).
Colgan, W., Mankoff, K. D., Kjeldsen, K., Bjørk, A. A., Box, J. E., Simonsen, S. B., Sørensen, L. S., Khan, S. A., Solgaard, A. M., Forsberg, R., Skourup, H., Stenseng, L., Kristensen, S. S., Hvidegaard, S. M., Citterio, M., KARLSSON, N. B., Fettweis, X., Ahlstrøm, A. P. Andersen, S. B., Van As, D., Fausto, R. S.
Geological Survey of Denmark and Greenland Bulletin 43. 2019.

Ice-penetrating radar survey of the subsurface debris field at Camp Century, Greenland.
KARLSSON, N. B. and W. T. Colgan and D. Binder and H. Machguth and J. Abermann and K. Hansen and A. Ø. Pedersen
Cold Regions Science and Technology. doi: 10.1016/j.coldregions.2019.102788. 2019.

Greenland Ice Sheet discharge from 2000 to 2018.
Mankoff, K. D., Colgan, W., Solgaard, A., KARLSSON, N. B., Ahlstrøm, A. P., van As, D., Box, J. E., Khan, S. A., Kjeldsen, K. K., Mouginot, J., and Fausto, R. S.
Earth Syst. Sci. Data, 11, 769-786, doi: 10.5194/essd-2019-29, 2019.

Modelling the Antarctic Ice Sheet across the Mid Pleistocene Transition – Implications for Oldest Ice.
Sutter, J., Fischer, H., Grosfeld, K., KARLSSON, N. B., Kleiner, T., Van Liefferinge, B., and Eisen, O.
The Cryosphere, 13, 2023–2041. doi: 10.5194/tc-13-2023-2019.


Prototype wireless sensors for monitoring subsurface processes in snow and firn.
Bagshaw, E. A., KARLSSON, N. B., Lok, L. B, Lishman, B., Clare, L., Nicholls, K. W., Burrow, S., Wadham, J. L., Eisen, O., Corr, H. F. J., Brennan, P. and Dahl-Jensen, D.
Journal of Glaciology. doi: 10.1017/jog.2018.76

Promising Oldest Ice sites in East Antarctica based on thermodynamical modelling
Van Liefferinge, B., Pattyn, F., Cavitte, M. G. P., KARLSSON, N. B., Young, D. A., Sutter, J., and Eisen, O.
The Cryosphere, 12, 2773-2787, 2018. doi: 10.5194/tc-12-2773-2018

Observationally constrained reconstruction of 19th to mid-20th century sea-ice extent off eastern Greenland
Hallé, D.A.M., KARLSSON, N.B., Solgaard, A.M. and Andresen, C.S.
Geological Survey of Denmark and Greenland Bulletin 41, 2018: Review of Survey activities 2017
PDF and data

Erosion at extended continental margins: Insights from new aerogeophysical data in eastern Dronning Maud Land.
Eagles, G., KARLSSON, N. B., Ruppel, A., Steinhage, D., Jokat, W.  and Läufer, A.
Gondwana Research, vol. 63, p. 105-116. doi:10.1016/

Glaciological characteristics in the Dome Fuji region and new assessment for “Oldest Ice”
KARLSSON, N. B., Binder, T., Eagles, G., Helm, V., Pattyn, F., Van Liefferinge, B., and Eisen, O.
The Cryosphere,12, 2413-2424. doi:10.5194/tc-12-2413-2018 

Basal conditions at Engabreen, Norway, inferred from surface measurements and inverse modelling.
Solgaard, A. M., Messerli, A., Schellenberger, T., Hvidberg, C. S., Grinsted, A., Jackson, M., Zwinger, T., KARLSSON, N. B. and Dahl-Jensen, D.
Journal of Glaciology, doi: 10.1017/jog.2018.45

Limited Impact of Subglacial Supercooling Freeze‐on for Greenland Ice Sheet Stratigraphy.
Dow, C. F., KARLSSON, N. B. and Werder, M. A.
Geophysical Research Letters, vol. 45, issue 3, doi: 10.1002/2017GL076251


Accumulation rates during 1311–2011 CE in North Central Greenland derived from radar data.
N. B. KARLSSON, O. Eisen, D. Dahl-Jensen, J. Freitag, S. Kipfstuhl, C. Lewis, L.T. Nielsen, J. D. Paden, A. Winter, and F. Wilhelms.
Frontiers in Earth Science | Cryospheric Sciences.


Automated Mapping of Changing Basal Environments in the Greenland Ice Sheet from Internal Layering in Radio-Echograms.
C. Panton and N. B. KARLSSON
Earth and Planetary Science Letters, vol. 432, pp. 323–331.

Response of the large-scale subglacial drainage system of North East Greenland to surface elevation changes.
N. B. KARLSSON. and D. Dahl-Jensen.
The Cryosphere, vol. 9, pp. 1465-1479.

Volume of Martian midlatitude glaciers from radar observations and ice flow modeling.
N. B. KARLSSON. L. S. Schmidt and C. S. Hvidberg
Geophysical Research Letters, vol. 42, pp. 2627-2633.

Ice-flow structure and ice-dynamic changes in the Weddell Sea sector of West Antarctica from radar-imaged internal layering.
R. G. Bingham, D. M. Rippin, N. B. KARLSSON, H. F. J. Corr, F. Ferraccioli, T. Jordan, A. Le Brocq, K. Rose, and N. Ross and M. J. Siegert
Journal of Geophysical Research, vol. 120, pp. 655-670.

Large-scale reconstruction of accumulation rates in Northern Greenland from radar data.
L. T. Nielsen, N. B. KARLSSON and C. S. Hvidberg
Annals of Glaciology, vol. 56 (70), pp. 70-78.


Initial results from geophysical surveys and shallow coring of the Northeast Greenland Ice Stream (NEGIS).
P. Vallelonga, K. Christianson, R. B. Alley, S. Anandakrishnan, J. E. M. Christian, D. Dahl-Jensen, V. Gkinis, C. Holme, R. W. Jacobel, N. B. KARLSSON, B. A. Keisling, S. Kipfstuhl, H. A. Kjær, M. E. L. Kristensen, A. Muto, L. E. Peters, T. Popp, K. L. Riverman, A. M. Svensson, C. Tibuleac, B. M. Vinther, Y. Weng and M. Winstrup
The Cryosphere, vol. 8., pp. 1275-1287.

Constraining Past Accumulation in the Central Pine Island Glacier Basin Using Radio-Echo Sounding.
N. B. KARLSSON, R. G. Bingham, D. M. Rippin, R. C. A. Hindmarsh, H. F. J. Corr and D. G. Vaughan
Journal of Glaciology, vol 60(221), pp. 553-562.

Isochronous information in a continental-scale Greenland radio-echo sounding dataset.
L. C. Sime, N. B. KARLSSON, J. D. Paden and S. P. Gogineni
Geophysical Research Letters, vol. 41, issue 5, pp. 1593-1599.


Tracing the Depth of the Holocene Ice in North Greenland from Radio-Echo Sounding Data.
N. B. KARLSSON, D. Dahl-Jensen, S. P. Gogineni and J. D. Paden.
Annals of Glaciology, vol. 54(64), pp. 44-50.

Eemian interglacial reconstructed from a Greenland folded ice core.
NEEM community members.
Nature, vol. 493, pp. 489-494.


A “continuity-index” for assessing ice-sheet dynamics from radarsounded internal layers.
N. B. KARLSSON, D. M. Rippin, R. G. Bingham and D. G. Vaughan.
Earth and Planetary Science Letters, vols. 335-336, pp. 88-94.


Testing for flow in the north polar layered deposits of Mars using radar stratigraphy and a simple 3D ice-flow model.
N. B. KARLSSON, J. W. Holt and R. C. A. Hindmarsh.
Geophysical Research Letters, vol. 38, issue 24, L24204, 6 pages.


The internal layering of Pine Island Glacier, West Antarctica, from airborne radar-sounding data.
N. B. KARLSSON, D. M. Rippin, D. G. Vaughan and H. F. J. Corr.
Annals of Glaciology, vol. 50 (51), pp. 141-146.