Institut for Geoscience

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Christensen, S. (2005). Kan sårbarhedskortlægningens datagrundlag og brug af modeller forbedres? I Hvordan bruger vi modeller? (s. 103-112). ATV Jord og Grundvand.
Christensen, S., Hansen, N. E., Jacobsen, B. H., Rasmussen, K. R. & Schmidt, O. (2003). Jagten på frisk drikkevand – de kostbare dråber: MatematikFysikKemi i Perspektiv. (2, nr. 4 udg.)
Christensen, S. (2002). A synthetic groundwater modelling study of the accuracy of GLUE uncertainty intervals. Abstract fra  27th General Assembly of EGS in Nice, Frankrig.
Christensen, S., Cooley, R. L., Kovar (red.), K. & Hrkal (red.), Z. (2002). Experiences from the testing of a theory for modelling groundwater flow in heterogeneous media. Afhandling præsenteret på 4th Int. Conf. on Calibration and Reliability in Groundwater Modelling, Model CARE, Charles University, Prague.
Christensen, N. B. (2006). Monitoring CO2 injection with cross-hole electrical resistivity tomography. Exploration Geophysics, 37, 44-49.
Christensen, N. B., Dodds, K. & Bulley, I. (2006). 1D inversion and analysis of marine controlled-source EM data. I Proceedings of the AAPG meeting, Perth, WA, November 5-8, 2006.
Christensen, N. B. & Wolfgram, P. (2006). Approximate 2D inversion of airborne TEM data. I Australian Earth Science Convention, 2-7 July, Melbourne, Australia Australian Earth Science Convention.
Christensen, S. & Doherty, J. (2008). Using many pilot points and singular value decomposition in groundwater model calibration. I J. C. Refsgaard, K. Kovar, E. Haarder & E. Nygaard (red.), Calibration and Reliability in Groundwater Modelling: Credibility in modelling: Proc. ModelCARE'2007 (Copenhagen, September 2007) (Bind IAHS Publication 320, s. 235-239). IAHS Press.
Christensen, S. & Doherty, J. (2008). Using many pilot points and singular value decomposition in groundwater model calibration. I J. C. Refsgaard & E. Nygaard (red.), ModelCARE’2007 , nt. Conf. on Calibration and Reliability in Groundwater Modelling – Credibility in Modelling: Pre-published proceedings (Bind 2, s. 448-453). GEUS.
Christensen, N. B. & Dodds, K. (2007). Special Section - Marine Controlled-Source Electromagnetic Methods. 1D inversion and resolution analysis of marine controlled-source EM data. Geophysics, 72, WA27-WA38.
Christensen, S. & Doherty, J. (2008). Predictive error dependencies when using pilot points and singular value decomposition in groundwater model calibration. Advances in Water Resources, 31(4), 674-700.
Christensen, S., Zlotnik, V. A. & Tartakovsky, D. M. (2009). Optimal design of pumping tests in leaky aquifiers for stream depletion analysis. Journal of Hydrology, 375(3-4), 554-565. https://doi.org/10.1016/j.jhydrol.2009.07.006
Christensen, A.-S. H., Lykke-Andersen, H., Jørgensen, F., Nørmark, E. & Auken, E. (2009). Integration of Seismics and SkyTEM in a Heterogeneous Geological Setting. Abstract fra American Geophysical Union (AGU) Fall Meeting, San Francisco, USA.
Christensen, S., Zlotnik, V. A. & Tartakovsky, D. M. (2010). On the use of analytical solutions to design pumping tests in leaky aquifers connected to a stream. Journal of Hydrology, 381(3-4), 341-351. https://doi.org/10.1016/j.jhydrol.2009.12.007
Christensen, N. B. & Tølbøll, R. J. (2009). A lateral model parameter correlation procedure for one-dimensional inverse modelling. Geophysical Prospecting, 57(5), 919-929. https://doi.org/10.1111/j.1365-2478.2008.00756.x
Christensen, N. B., Reid, J. E. & Halkjær, M. (2009). Fast, laterally smooth inversion of airborne time-domain electromagnetic data. Near Surface Geophysics, 7(5-6), 599-612. https://doi.org/10.3997/1873-0604.2009047
Christensen, N. B., Fitzpatrick, A. & Munday, T. (2010). Fast approximate 1D inversion of frequency domain electromagnetic data. Near Surface Geophysics, 8(1), 1-15. https://doi.org/10.3997/1873-0604.2009026
Christensen, A. D., Egholm, D. L. & Piotrowski, J. A. (2011). Numerical modelling of sediment deformation by glacial stress. Abstract fra XVIII INQUA Congress, Bern, Schweiz. http://cs.au.dk/~adc/files/INQUA2011-Poster.pdf
Christensen, A. D., Egholm, D. L. & Piotrowski, J. A. (2011). Numerical modelling of subglacial sediment deformation. Geophysical Research Abstracts, 13(EGU2011-7829). http://meetingorganizer.copernicus.org/EGU2011/EGU2011-7829.pdf
Christensen, N. B. & Lawrie, K. (2012). Resolution analyses for selecting an appropriate airborne electromagnetic (AEM) system. Exploration Geophysics, 43, 213-227. http://www.publish.csiro.au/nid/224/display/citation/paper/EG12005.htm
Christensen, A. D., Egholm, D. L., Piotrowski, J. A. & Tulaczyk, S. (2012). Discrete Element modelling of subglacial sediment deformation. Geophysical Research Abstracts, 14, EGU2012-2931. http://presentations.copernicus.org/EGU2012-2931_presentation.pdf
Christensen, N. K., Christensen, S. & Ferre, T. (2014). Hydro-geofysisk "Testbench". Abstract fra ATV Vintermøde om Forurenet Jord og Grundvand, Vingsted, Danmark.
Christensen, N. B. (2014). Sensitivity functions of transient electromagnetic methods. Geophysics, 79(4), E167-E182. https://doi.org/10.1190/GEO2013-0364.1
Christensen, N. B. & Halkjær, M. (2014). Mapping pollution and coastal hydrogeology with helicopterborne transient electromagnetic measurements. Exploration Geophysics, 45(4), 243-254. https://doi.org/10.1071/EG13071
Christensen, N. B. & Lawrie, K. (2014). Response to comments by Adam Smiarowski and Shane Mulè on: Christensen, N., and Lawrie, K., 2012. Resolution analyses for selecting an appropriate airborne electromagnetic (AEM) system. Exploration Geophysics, 43, 213-227. https://doi.org/10.1071/EG14015
Christensen, N. K., Christensen, S. & Ferre, T. (2014). Integrating geophysics and hydrology for reducing the uncertainty of groundwater model predictions and improved prediction performance. Abstract fra AGU Fall Meeting, San Francisco, USA.
Christensen, N. K., Christensen, S. & Ferre, T. (2014). Testing how geophysics can reduce the uncertainty of groundwater model predictions. Geophysical Research Abstracts, 16, Artikel EGU2014-9602. http://meetingorganizer.copernicus.org/EGU2014/EGU2014-9602.pdf
Christensen, L. & Friedrich, W. L. (1973). Stenenes kædedans - ringe-netværk og striber - i marken. Varv, (4), 99-106.
Christensen, N. K., Christensen, S. & Ferre, T. (2016). Testing alternative uses of electromagnetic data to reduce the prediction error of groundwater models. Hydrology and Earth System Sciences, 20(5), 1925-1946. https://doi.org/10.5194/hess-20-1925-2016
Christensen, N. K., Ferre, T., Fiandaca, G. & Christensen, S. (2017). Voxel inversion of airborne electromagnetic data for improved groundwater model construction and prediction accuracy. Hydrology and Earth System Sciences, 21(2), 1321-1337. https://doi.org/10.5194/hess-21-1321-2017
Christensen, N. B. (2016). Fast approximate 1D modelling and inversion of transient electromagnetic data. Geophysical Prospecting, 64(6), 1620-1631. https://doi.org/10.1111/1365-2478.12373
Christensen, N. B. (2016). Strictly horizontal lateral parameter correlation for 1D inverse modelling of large data sets. Near Surface Geophysics, 14(5), 403-411 . https://doi.org/10.3997/1873-0604.2016028
Christensen, N. K., Minsley, B. J. & Christensen, S. (2017). Generation of 3-D hydrostratigraphic zones from dense airborne electromagnetic data to assess groundwater model prediction error. Water Resources Research, 53(2), 1019-1038. https://doi.org/10.1002/2016WR019141
Christensen, S. (2017). Methods to correct and compute confidence and prediction intervals of models neglecting sub-parameterization heterogeneity – From the ideal toward practice. Advances in Water Resources, 100(Februar), 109-125. https://doi.org/10.1016/j.advwatres.2016.12.007
Christensen, N. B. (2017). Deriving interpretation attributes from AEM surveys using the continuous wavelet transform. I 2nd European Airborne Electromagnetics Conference 2017, Held at Near Surface Geoscience Conference and Exhibition 2017 (s. 101-105). European Association of Geoscientists and Engineers. https://doi.org/10.3997/2214-4609.201702168
Christensen, N. B. (2018). Interpretation attributes derived from airborne electromagnetic inversion models using the continuous wavelet transform. Near Surface Geophysics, 16(6), 665-678. https://doi.org/10.1002/nsg.12018
Christensen, N. B. & C. Lawrie, K. (2017). A novel approach to comparing AEM inversion results with borehole conductivity logs. Exploration Geophysics, 49(3), 309-322. https://doi.org/10.1071/EG17029
Christensen, N. B. & Christiansen, A. V. (2021). Using geophysical survey results in the inference of aquifer vulnerability measures. Near Surface Geophysics, 19(5), 505-521. https://doi.org/10.1002/nsg.12171
Christensen, N. B. (2022). Joint inversion of airborne TEM data and surface geoelectrical data: The Egebjerg case. Journal of Applied Geophysics, 196(3), Artikel 104511. https://doi.org/10.1016/j.jappgeo.2021.104511
Christensen, N. B. (2022). Resolution attributes for geophysical inversion models: Depth of investigation and novel measures. Near Surface Geophysics, 20(1), 3-15. https://doi.org/10.1002/nsg.12188
Christensen, N. B. (2022). Pivotal moments: Seven scenes from a geophysics adventure: Scene 1. Preview, (216), 32-34. https://doi.org/10.1080/14432471.2022.2041319
Christensen, N. B. (2022). Pivotal moments: Seven scenes from a geophysics adventure: Scene 2. Preview, (217), 31-32. https://doi.org/10.1080/14432471.2022.2057086
Christensen, N. B. (2022). Pivotal moments: Seven scenes from a geophysics adventure: Scene 3. Preview, (218), 33-35. https://doi.org/10.1080/14432471.2022.2083801
Christensen, N. B. (2022). Pivotal moments: Seven scenes from a geophysics adventure: Scene 4. Preview, (219), 31-32. https://doi.org/10.1080/14432471.2022.2103990
Christensen, N. B. (2022). Pivotal moments: Seven scenes from a geophysics adventure: Scenes 5 & 6. Preview, (220), 30-32. https://doi.org/10.1080/14432471.2022.2127688
Christensen, N. B. (2022). Pivotal moments: Seven scenes from a geophysics adventure: Scene 7. Preview, (221), 34-37. https://doi.org/10.1080/14432471.2022.2149180
Christensen, S. (2024). Documentation of Edcrop – version 1: A Python package to simulate field-scale evapotranspiration and drainage from crop, wetland, or forest . AU Library Scholarly Publishing Services. https://doi.org/10.7146/aul.539
Christensen, N. B. & Jacobsen, B. H. (2025). A fast hybrid 1D inversion approach for ground conductivity data. Near Surface Geophysics, 23(1), 30-48. https://doi.org/10.1002/nsg.12327
Christensen, N. B., Christiansen, A. V. & Christensen, N. K. (2024). Mere sikre valg af nedsivningsområder. Vand & Jord, 31. årgang(December 2024), 144-149.
Christensen, N. B. (2025). Linear filter theory for the forward Laplace transform and its use in calculating 1D EM responses. Computers and Geosciences, 198, Artikel 105865. https://doi.org/10.1016/j.cageo.2025.105865

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Revideret 20.08.2021