Greenland Geothermal Heat Flow Database and Map (Version 1)
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Greenland Geothermal Heat Flow Database and Map (Version 1). / Colgan, William; Wansing, Agnes; Mankoff, Kenneth; Lösing, Mareen; Hopper, John; Louden, Keith; Ebbing, Jörg; Christiansen, Flemming G.; Ingeman-Nielsen, Thomas; Liljedahl, Lillemor Claesson; MacGregor, Joseph A.; Hjartarson, Árni; Bernstein, Stefan; Karlsson, Nanna B.; Fuchs, Sven; Hartikainen, Juha; Liakka, Johan; Fausto, Robert S.; Dahl-Jensen, Dorthe; Bjørk, Anders; Naslund, Jens Ove; Mørk, Finn; Martos, Yasmina; Balling, Niels; Funck, Thomas; Kjeldsen, Kristian K.; Petersen, Dorthe; Gregersen, Ulrik; Dam, Gregers; Nielsen, Tove; Khan, Shfaqat A.; Løkkegaard, Anja.
I: Earth System Science Data, Bind 14, Nr. 5, 2022, s. 2209-2238.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Greenland Geothermal Heat Flow Database and Map (Version 1)
AU - Colgan, William
AU - Wansing, Agnes
AU - Mankoff, Kenneth
AU - Lösing, Mareen
AU - Hopper, John
AU - Louden, Keith
AU - Ebbing, Jörg
AU - Christiansen, Flemming G.
AU - Ingeman-Nielsen, Thomas
AU - Liljedahl, Lillemor Claesson
AU - MacGregor, Joseph A.
AU - Hjartarson, Árni
AU - Bernstein, Stefan
AU - Karlsson, Nanna B.
AU - Fuchs, Sven
AU - Hartikainen, Juha
AU - Liakka, Johan
AU - Fausto, Robert S.
AU - Dahl-Jensen, Dorthe
AU - Bjørk, Anders
AU - Naslund, Jens Ove
AU - Mørk, Finn
AU - Martos, Yasmina
AU - Balling, Niels
AU - Funck, Thomas
AU - Kjeldsen, Kristian K.
AU - Petersen, Dorthe
AU - Gregersen, Ulrik
AU - Dam, Gregers
AU - Nielsen, Tove
AU - Khan, Shfaqat A.
AU - Løkkegaard, Anja
N1 - Publisher Copyright: © 2022 Copernicus GmbH. All rights reserved.
PY - 2022
Y1 - 2022
N2 - We compile and analyze all available geothermal heat flow measurements collected in and around Greenland into a new database of 419 sites and generate an accompanying spatial map. This database includes 290 sites previously reported by the International Heat Flow Commission (IHFC), for which we now standardize measurement and metadata quality. This database also includes 129 new sites, which have not been previously reported by the IHFC. These new sites consist of 88 offshore measurements and 41 onshore measurements, of which 24 are subglacial. We employ machine learning to synthesize these in situ measurements into a gridded geothermal heat flow model that is consistent across both continental and marine areas in and around Greenland. This model has a native horizontal resolution of 55ĝ€¯km. In comparison to five existing Greenland geothermal heat flow models, our model has the lowest mean geothermal heat flow for Greenland onshore areas. Our modeled heat flow in central North Greenland is highly sensitive to whether the NGRIP (North GReenland Ice core Project) elevated heat flow anomaly is included in the training dataset. Our model's most distinctive spatial feature is pronounced low geothermal heat flow (<ĝ€¯40ĝ€¯mWĝ€¯m-2) across the North Atlantic Craton of southern Greenland. Crucially, our model does not show an area of elevated heat flow that might be interpreted as remnant from the Icelandic plume track. Finally, we discuss the substantial influence of paleoclimatic and other corrections on geothermal heat flow measurements in Greenland. The in situ measurement database and gridded heat flow model, as well as other supporting materials, are freely available from the GEUS Dataverse (10.22008/FK2/F9P03L; Colgan and Wansing, 2021).
AB - We compile and analyze all available geothermal heat flow measurements collected in and around Greenland into a new database of 419 sites and generate an accompanying spatial map. This database includes 290 sites previously reported by the International Heat Flow Commission (IHFC), for which we now standardize measurement and metadata quality. This database also includes 129 new sites, which have not been previously reported by the IHFC. These new sites consist of 88 offshore measurements and 41 onshore measurements, of which 24 are subglacial. We employ machine learning to synthesize these in situ measurements into a gridded geothermal heat flow model that is consistent across both continental and marine areas in and around Greenland. This model has a native horizontal resolution of 55ĝ€¯km. In comparison to five existing Greenland geothermal heat flow models, our model has the lowest mean geothermal heat flow for Greenland onshore areas. Our modeled heat flow in central North Greenland is highly sensitive to whether the NGRIP (North GReenland Ice core Project) elevated heat flow anomaly is included in the training dataset. Our model's most distinctive spatial feature is pronounced low geothermal heat flow (<ĝ€¯40ĝ€¯mWĝ€¯m-2) across the North Atlantic Craton of southern Greenland. Crucially, our model does not show an area of elevated heat flow that might be interpreted as remnant from the Icelandic plume track. Finally, we discuss the substantial influence of paleoclimatic and other corrections on geothermal heat flow measurements in Greenland. The in situ measurement database and gridded heat flow model, as well as other supporting materials, are freely available from the GEUS Dataverse (10.22008/FK2/F9P03L; Colgan and Wansing, 2021).
U2 - 10.5194/essd-14-2209-2022
DO - 10.5194/essd-14-2209-2022
M3 - Journal article
VL - 14
SP - 2209
EP - 2238
JO - Earth System Science Data
JF - Earth System Science Data
SN - 1866-3508
IS - 5
ER -
ID: 307368860