Auken, Esben

Christiansen, Anders Vest

Doetsch , Joseph

Fiandaca, Gianluca

Ingeman-Nielsen, Thomas

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 18, 2017Monitoring of active layer refreezing in Greenlandic permafrostDoetsch  , Joseph ; Christiansen, Anders Vest; Auken, Esben; Fiandaca, Gianluca; Ingeman-Nielsen,ThomasPublished in:2nd International Workshop on Geoelectrical MonitoringPublication date:2013Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Doetsch  , J., Christiansen, A. V., Auken, E., Fiandaca, G., & Ingeman-Nielsen, T. (2013). Monitoring of activelayer refreezing in Greenlandic permafrost. In 2nd International Workshop on Geoelectrical Monitoring (pp. 28-28). [13]  (Berichte der geologischen Bundesanstalt, Vol. 104).GELMON 2013 Berichte Geol. B.-A., 104, ISSN 1017‐8880  2nd Internat. Workshop on Geoelectrical Monitoring GELMON 2013, Vienna, 04.-06.12.2013    13 Monitoring of active layer refreezing in Greenlandic permafrost Doetsch Joseph1, Christiansen Anders Vest1, Auken Esben1, Fiandaca Gianluca1, Ingeman-Nielsen Thomas2 1Aarhus University, Denmark 2Technical University of Denmark  The state of the high-latitude permafrost for the Earth’s climate system has been widely acknowledged, but permafrost dynamics in a changing climate are poorly understood. Especially the annually freezing and thawing active layer is critical for climate dynamics, but it is difficult to monitor without disturbing the studied system. We use minimally invasive surface geoelectrical monitoring to image active layer refreezing and its lateral variation at high temporal resolution. Our monitoring setup on Disko island, Greenland, allows acquisition of up to 12 data sets per day, using 54 electrodes on two parallel lines. Data is automatically acquired, backed up locally and uploaded to an online database. We test different time-lapse inversion strategies on the large amount of data and correlate our inversion results with local temperature point measurements. The comparison of the time-lapse inversion results and the temperature and moisture content measurements aims at developing a petrophysical model for partially and fully frozen soils.   28 

Monitoring of active layer refreezing in Greenlandic permafrost

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Monitoring of active layer refreezing in Greenlandic permafrost

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