Lars Nielsen

Search results

• 2023

  High‐Resolution Geological Information from Crosshole Ground Penetrating Radar in Clayey Tills

  Jensen, B. B., Rosenberg, L., Tsitonaki, A., Tuxen, N., Bjerg, P. L., Nielsen, L., Hansen, T. M. & Looms, M. C., 2023, In: Ground Water Monitoring & Remediation. 43, 4, p. 55-66

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  13 Downloads (Pure)

• Innovating land seismic investigations for CO2 geologic storage in Denmark

  Papadopoulou, M., Zappalá, S., Malehmir, A., Gregersen, U., Hjelm, L., Nielsen, L. & Haspang, M. P., 2023, In: Geophysics. 88, 5, p. B251–B266

  Research output: Contribution to journal › Journal article › Research › peer-review
  4 Citations (Scopus)

• Prediction of porosity and water saturation of chalks from combined refraction seismic and reflection ground-penetrating radar measurements

  Yuan, H., Abdu, A. Z. & Nielsen, L., 2023, In: Geophysics. 88, 3, p. MR141-MR153

  Research output: Contribution to journal › Journal article › Research › peer-review
  1 Citation (Scopus)

• Using a synthetic data trained convolutional neural network for predicting subresolution thin layers from seismic data

  Qu, D., Mosegaard, K., Feng, R. & Nielsen, L., 21 Apr 2023, In: Interpretation. 11, 2, p. T339-T347 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

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  3 Downloads (Pure)
• 2022

  Estimation of shear sonic logs in the heterogeneous and fractured Lower Cretaceous of the Danish North Sea using supervised learning

  Lorentzen, M., Bredesen, K., Mosegaard, K. & Nielsen, L., 2022, In: Geophysical Prospecting. 70, 8, p. 1410-1431 22 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  3 Citations (Scopus)

  27 Downloads (Pure)

• Mapping Cretaceous faults using a convolutional neural network - A field example from the Danish North Sea

  Lorentzen, M. C. L., Bredesen, K., Smit, F. W. H., Hansen, T. H., Nielsen, L. & Mosegaard, K., 2022, In: Bulletin of the Geological Society of Denmark. 71, p. 31-50 20 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  72 Downloads (Pure)

• Seismic interpretation pitfalls caused by interference effects, exemplified by seismic modeling of outcropping chalk successions

  Qu, D., Anderskouv, K., Stemmerik, L. & Nielsen, L., 2022, In: Interpretation (United Kingdom). 10, 3, p. T441-T449 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  1 Citation (Scopus)
• 2021

  A Holocene relative sea-level database for the Baltic Sea

  Rosentau, A., Klemann, V., Bennike, O., Steffen, H., Wehr, J., Latinović, M., Bagge, M., Ojala, A., Berglund, M., Becher, G. P., Schoning, K., Hansson, A., Nielsen, L., Clemmensen, L. B., Hede, M. U., Kroon, A., Pejrup, M., Sander, L., Stattegger, K., Schwarzer, K. & 9 others, Lampe, R., Lampe, M., Uścinowicz, S., Bitinas, A., Grudzinska, I., Vassiljev, J., Nirgi, T., Kublitskiy, Y. & Subetto, D., 1 Aug 2021, In: Quaternary Science Reviews. 266, 19 p., 107071.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  36 Citations (Scopus)

  34 Downloads (Pure)

• Optical dating of cobble surfaces determines the chronology of Holocene beach ridges in Greenland

  Souza, P. E., Sohbati, R., Murray, A. S., Clemmensen, L. B., Kroon, A. & Nielsen, L., 2021, In: Boreas. 50, 2, p. 606-618 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  16 Citations (Scopus)

• Practical data acquisition strategy for time-lapse experiments using crosshole GPR and full-waveform inversion

  Keskinen, J., Looms, M. C., Klotzsche, A. & Nielsen, L., 2021, In: Journal of Applied Geophysics. 191, 11 p., 104362.

  Research output: Contribution to journal › Journal article › Research › peer-review
  5 Citations (Scopus)

• Quantitative seismic interpretation of the Lower Cretaceous reservoirs in the Valdemar Field, Danish North Sea

  Bredesen, K., Lorentzen, M., Nielsen, L. & Mosegaard, K., 1 Nov 2021, In: Petroleum Geoscience. 27, 4, 17 p., petgeo2021-016.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  3 Citations (Scopus)

  24 Downloads (Pure)

• Rock physics characterization of chalk by combining acoustic and electromagnetic properties

  Yuan, H., Looms, M. C. & Nielsen, L., 22 Sep 2021, In: Geophysics. 87, 1, p. MR1-MR11 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  3 Citations (Scopus)

• Upscaling of outcrop information for improved reservoir modelling: Exemplified by a case study on chalk

  Mosegaard, K., Qu, D., Frykman, P., Stemmerik, L. & Nielsen, L., 2021, In: Petroleum Geoscience. 27, 4, 8 p., petgeo2020-126.

  Research output: Contribution to journal › Journal article › Research › peer-review
  4 Citations (Scopus)
• 2020

  Data-driven source wavelets for crosshole ground-penetrating radar full-waveform modeling

  Svendsen, E. B., Nielsen, L., Nilsson, B., Kjær, K. H. & Looms, M. C., 11 Nov 2020, p. 392-395. 4 p.

  Research output: Contribution to conference › Paper › Research › peer-review

• Geophysics for urban mining and the first surveys in Denmark: rationale, field activity and preliminary results

  Sandrin, A., Maricak, A., Heincke, B. H., Clausen, R. J., Nielsen, L. & Keiding, J. K., 2020, In: Geological Survey of Denmark and Greenland (GEUS) Bulletin. 44, 6 p., 5240.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  1 Citation (Scopus)

  85 Downloads (Pure)

• Improved seismic interpretation of a salt diapir by utilization of diffractions, exemplified by 2D reflection seismics, Danish sector of the North Sea

  Montazeri, M., Boldreel, L. O., Uldall, A. & Nielsen, L., 2020, In: Interpretation. 8, 1, p. T77-T88 12 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  5 Citations (Scopus)

• On the usage of diffractions in ground-penetrating radar reflection data: Implications for time-lapse gas migration monitoring

  Yuan, H., Looms, M. C. & Nielsen, L., 1 Sep 2020, In: Geophysics. 85, 5, p. H83-H95 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  7 Citations (Scopus)

• Rock physics templates for chalk by combining acoustic and EM velocity

  Yuan, H., Looms, M. C. & Nielsen, L., 2020, p. 5407. 1 p.

  Research output: Contribution to conference › Conference abstract for conference › Research › peer-review
• 2019

  Deep onshore reflection seismic imaging of the chalk group strata using a 45 kg accelerated weight-drop and combined recording systems with dense receiver spacing

  Kammann, J., Malehmir, A., Brodic, B., Tagliavento, M., Stemmerik, L., Normark, E., Lykke-Andersen, H. & Nielsen, L., 2019, In: Geophysics. 84, 4, p. B259-B268 10 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  11 Citations (Scopus)

• Diffraction imaging of ground-penetrating radar data

  Yuan, H., Montazeri, M., Looms, M. C. & Nielsen, L., 2019, In: Geophysics. 84, 3, p. H1-H12 12 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  24 Citations (Scopus)

• Luminescence dating of buried cobble surfaces from sandy beach ridges: a case study from Denmark

  Souza, P. E., Sohbati, R., Murray, A. S., Kroon, A., Clemmensen, L. B., Hede, M. U. & Nielsen, L., 2019, In: Boreas. 48, 4, p. 841-855 15 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  27 Citations (Scopus)

  114 Downloads (Pure)

• Morphodynamics of an abandoned delta lobe in NE Greenland

  Kroon, A., Bendixen, M., Nielsen, L. & Sigsgaard, C., 2019, Proceedings of Coastal Sediments 2019. Wang, P., Rosati, J. D. & Vallee, M. (eds.). World Scientific, p. 2908-2917

  Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  File
• 2018

  Beach-ridge architecture constrained by beach topography and Ground-Penetrating Radar, Itilleq (Lakse Bugt), Disko, Greenland – Implications for sea-level reconstructions.

  Emerich Souza, P., Kroon, A. & Nielsen, L., 2018, In: Bulletin of the Geological Society of Denmark. 66, p. 167-179 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  5 Citations (Scopus)

  70 Downloads (Pure)

• Beach-ridge architecture constrained by beach topography and ground-penetrating radar, Itilleq (Laksebugt), south-west Disko, Greenland - implications for sea-level reconstructions

  Souza, P. E., Kroon, A. & Nielsen, L., 2018, In: Bulletin of the Geological Society of Denmark. 66, p. 167-179 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  83 Downloads (Pure)

• Constraining the age of gravelly beach ridges using rock surface luminescence dating – implications for mapping sea-level variation in the Holocene

  Emerich Souza, P., Sohbati, R., Murray, A., Kroon, A., Meldgaard, A., Clemmensen, L. B. & Nielsen, L., 2018. 1 p.

  Research output: Contribution to conference › Poster › Research

  Open Access

• Mapping sand layers in clayey till using crosshole ground-penetrating radar

  Zibar, M. C. L., Klotzsche, A., van der Kruk, J., Larsen, T. H., Edsen, A., Tuxen, N., Hamburger, N., Keskinen, J. & Nielsen, L., 2018, In: Geophysics. 83, 1, p. A21-A26 6 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  15 Citations (Scopus)

• Pitfalls in velocity analysis for strongly contrasting, layered media - Example from the Chalk Group, North Sea

  Montazeri, M., Uldall, A., Moreau, J. & Nielsen, L., 2018, In: Journal of Applied Geophysics. 149, p. 52-62 11 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  9 Citations (Scopus)

• Sedimentary architecture and depositional controls of a Holocene wave-dominated barrier-island system

  Fruergaard, M., Johannessen, P. N., Nielsen, L. H., Nielsen, L., Møller, I., Andersen, T. J., Piasecki, S. & Pejrup, M., 2018, In: Sedimentology. 65, 4, p. 1170-1212 43 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  22 Citations (Scopus)
• 2017

  Advances in Geophysics [volume 58]

  Nielsen, L. (ed.), 2017, Cambridge, MA: Academic Press. 106 p.

  Research output: Book/Report › Anthology › Research › peer-review

• Full-waveform inversion of Crosshole GPR data: implications for porosity estimation in chalk

  Keskinen, J., Klotzsche, A., Zibar, M. C. L., Moreau, J., van der Kruk, J., Holliger, K., Stemmerik, L. & Nielsen, L., May 2017, In: Journal of Applied Geophysics. 140, p. 102-116 15 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  36 Citations (Scopus)

• Sea-level proxies in Holocene raised beach ridge deposits (Greenland) revealed by ground-penetrating radar

  Nielsen, L., Bendixen, M., Kroon, A., Hede, M. U., Clemmensen, L. B., Weβling, R. & Elberling, B., 2017, In: Scientific Reports. 7, 8 p., 46460 .

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  25 Citations (Scopus)

  261 Downloads (Pure)

• Water flow in the active layer along an arctic slope – An investigation based on a field campaign and model simulations

  Zastruzny, S. F., Elberling, B., Nielsen, L. & Jensen, K. H., 15 Jun 2017

  Research output: Other contribution › Research
• 2016

  Advances in Geophysics [volume 57]

  Nielsen, L. (ed.), 2016, Academic Press. 218 p.

  Research output: Book/Report › Anthology › Research › peer-review

• Coastal lagoons and beach ridges as complementary sedimentary archives for the reconstruction of Holocene relative sea-level changes

  Sander, L., Hede, M. U., Fruergaard, M., Nielsen, L., Clemmensen, L. B., Kroon, A., Johannessen, P. N., Nielsen, L. H. & Pejrup, M., Feb 2016, In: Terra Nova. 28, 1, p. 43-49

  Research output: Contribution to journal › Journal article › Research › peer-review
  32 Citations (Scopus)

• Continuous record of Holocene sea-level changes and coastal development of the Kattegat island Laeso (4900 years BP to present)

  Hansen, J. M., Aagaard, T., Stockmarr, J., Moller, I., Nielsen, L., Binderup, M., Larsen, J. H. & Larsen, B., 2016, In: Geological Society of Denmark. Bulletin. 64, p. 1-55 55 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  10 Citations (Scopus)

  1038 Downloads (Pure)

• Early diagenetic evolution of Chalk in eastern Denmark

  Moreau, J., Boussaha, M., Nielsen, L., Thibault, N. R., Ullmann, C. V. & Stemmerik, L., Dec 2016, In: The Depositional Record. 2, 2, p. 154-172 19 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  Open Access

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  13 Citations (Scopus)

  405 Downloads (Pure)

• High-resolution shear-wave seismics across the Carlsberg Fault zone south of Copenhagen: Implications for linking Mesozoic and late Pleistocene structures

  Kammann, J., Huebscher, C., Boldreel, L. O. & Nielsen, L., 6 Jul 2016, In: Tectonophysics. 682, p. 56-64

  Research output: Contribution to journal › Journal article › Research › peer-review
  13 Citations (Scopus)

• Holocene RSL variation on southwestern Disko Island (Greenland): an interpretation based on GPR data, topography and luminescence dating

  Emerich Souza, P., Nielsen, L., Kroon, A., Murray, A. S., Sohbati, R. & Clemmensen, L. B., 2016. 1 p.

  Research output: Contribution to conference › Poster › Research

  Open Access

• Past sea-level data from Lakse Bugt, Disko Island, West Greenland from ground-penetrating radar data

  Emerich Souza, P., Nielsen, L., Kroon, A. & Clemmensen, L. B., 2016. 1 p.

  Research output: Contribution to conference › Poster › Research

  Open Access

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  67 Downloads (Pure)
• 2015

  3D visualisation of a Jurassic oolitic system with GPR data, Isle of Portland (UK)

  Moreau, J., Hansen, T. L. & Nielsen, L., Jun 2015. 1 p.

  Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

• Barrier system response to a changing sea-level

  Fruergaard, M., Møller, I., Johannessen, P., Nielsen, L. H., Andersen, T. J., Nielsen, L., Sander, L. & Pejrup, M., 2015.

  Research output: Contribution to conference › Conference abstract for conference › Research

• Changes in Holocene relative sea-level and coastal morphology: A study of a raised beach ridge system on Samsø, southwest Scandinavia

  Hede, M. U., Sander, L., Clemmensen, L. B., Kroon, A., Pejrup, M. & Nielsen, L., 2015, In: The Holocene. 25, 9, p. 1402-1414 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  35 Citations (Scopus)

• Changes in relative sea-level and coastal morphology during the last 5000 years: a case study from the island of Samsø, Denmark

  Hede, M. U., Sander, L., Clemmensen, L. B., Kroon, A., Pejrup, M. & Nielsen, L., 2015, In: Geophysical Research Abstracts. 17, 1 p., 10456.

  Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

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  314 Downloads (Pure)

• Estimation of Recharge from Long-Term Monitoring of Saline Tracer Transport Using Electrical Resistivity Tomography

  Haarder, E. B., Jensen, K. H., Binley, A., Nielsen, L., Uglebjerg, T. B. & Zibar, M. C. L., 2015, In: Vadose Zone Journal. 14, 7, 13 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  15 Citations (Scopus)

• From ooze to sedimentary rock, the first diagenetic processes affecting the chalk of eastern Denmark

  Moreau, J., Boussaha, M., Nielsen, L., Thibault, N. R., Ullmann, C. V. & Stemmerik, L., Jun 2015. 1 p.

  Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

• Full-waveform Inversion of Crosshole GPR Data Collected in Strongly Heterogeneous Chalk: Challenges and Pitfalls

  Keskinen, J., Zibar, M. C. L., Nielsen, L., Klotzsche, A., van der Kruk, J., Moreau, J., Stemmerik, L. & Holliger, K., 2015, In: Geophysical Research Abstracts. 17, EGU2015-14581.

  Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

  Open Access

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  129 Downloads (Pure)

• Imaging a fossil oolitic system with GPR, insights into the exposures of the Isle of Portland (UK)

  Moreau, J., Hansen, T. L. & Nielsen, L., Apr 2015. 1 p.

  Research output: Contribution to conference › Conference abstract for conference › Research

• Integrated analysis of beach ridge and lagoon systems as indicator of sea-level changes

  Sander, L., Hede, M. U., Fruergaard, M., Morigi, C., Johannessen, P., Nielsen, L., Clemmensen, L. B., Nielsen, L. H. & Pejrup, M., 2015, In: Geophysical Research Abstracts. 17, 1 p., 9341.

  Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

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  1 Downloads (Pure)

• Quaternary layer anomalies around the Carlsberg Fault zone mapped with high-resolution shear-wave seismics south of Copenhagen

  Kammann, J., Hübscher, C., Nielsen, L. & Boldreel, L. O., 2015. 1 p.

  Research output: Contribution to conference › Conference abstract for conference › Research

• Stratigraphy, evolution, and controls of a Holocene transgressive-regressive barrier island under changing sea-level: Danish North Sea coast

  Fruergaard, M., Møller, I., Johannessen, P., Nielsen, L. H., Andersen, T. J., Nielsen, L., Sander, L. & Pejrup, M., 2015, In: Journal of Sedimentary Research. 85, 7, p. 820-844

  Research output: Contribution to journal › Journal article › Research › peer-review
  54 Citations (Scopus)