Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods
Riverine mercury (Hg) export dynamics from the Zackenberg River Basin (ZRB) in Northeast Greenland were studied for the period 2009-2013. Dissolved and sediment-bound Hg was measured regularly in the Zackenberg River throughout the periods with running water (June-October) and coupled to water disch...
Published in: | Science of The Total Environment |
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2015
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Online Access: | https://curis.ku.dk/portal/da/publications/mercury-exports-from-a-higharctic-river-basin-in-northeast-greenland-74n-largely-controlled-by-glacial-lake-outburst-floods(9bf60a56-09bd-4c5f-81de-bdf4dbdb2366).html https://doi.org/10.1016/j.scitotenv.2015.01.097 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/9bf60a56-09bd-4c5f-81de-bdf4dbdb2366 2024-06-09T07:42:29+00:00 Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods Sondergaard, Jens Tamstorf, Mikkel Elberling, Bo Larsen, Martin M. Mylius, Maria Rask Lund, Magnus Abermann, Jakob Riget, Frank 2015 https://curis.ku.dk/portal/da/publications/mercury-exports-from-a-higharctic-river-basin-in-northeast-greenland-74n-largely-controlled-by-glacial-lake-outburst-floods(9bf60a56-09bd-4c5f-81de-bdf4dbdb2366).html https://doi.org/10.1016/j.scitotenv.2015.01.097 eng eng info:eu-repo/semantics/closedAccess Sondergaard , J , Tamstorf , M , Elberling , B , Larsen , M M , Mylius , M R , Lund , M , Abermann , J & Riget , F 2015 , ' Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods ' , Science of the Total Environment , vol. 514 , pp. 83-91 . https://doi.org/10.1016/j.scitotenv.2015.01.097 Hg River export Arctic Snow Soil Permafrost article 2015 ftcopenhagenunip https://doi.org/10.1016/j.scitotenv.2015.01.097 2024-05-16T11:29:16Z Riverine mercury (Hg) export dynamics from the Zackenberg River Basin (ZRB) in Northeast Greenland were studied for the period 2009-2013. Dissolved and sediment-bound Hg was measured regularly in the Zackenberg River throughout the periods with running water (June-October) and coupled to water discharge measurements. Also, a few samples of snow, soil, and permafrost were analysed for Hg. Mean concentrations of dissolved and sediment-bound Hg in the river water (+/- SD) were 039 +/- 0.13 and 5.5 +/- 1.4 ng L-1, respectively, and mean concentrations of Hg in the river sediment were 0.033 +/- 0.025 mg kg(-1). Temporal variations in river Hg were mainly associated with snowmelt, sudden erosion events, and outburst floods from a glacier-dammed lake in the upper part of the ZRB. Annual Hg exports from the 514 km(2) ZRB varied from 0.71 to >1.57 kg and the majority (86-96 was associated with sediment-bound Hg. Hg yields from the ZRB varied from 1.4-3.1 g Hg km(-2) yr(-1) and were among the highest yields reported from Arctic river basins. River exports of Hg from ZRB were found to be largely controlled by the frequency, magnitude and timing of the glacial lake outburst floods, which occurred in four of the five years in July-August. Floods accounted for 5 to >10% of the annual water discharge, and up to >31% of the annual Hg export. Also, the winter snowfall and the summer temperatures were found to be important indirect controls on the annual Hg export. The occurrence and timing of glacial lake outburst floods in the ZRB in late summer at the time of maximum soil thaw depth, the location of the glacier in the upper ZRB, and increased thawing of the permafrost in Zackenberg in recent years leading to destabilisation of river banks are considered central factors explaining the high fraction of flood-controlled Hg export in this area. (C) 2015 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Arctic Arctic glacier Greenland permafrost Zackenberg University of Copenhagen: Research Arctic Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Greenland Science of The Total Environment 514 83 91 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Hg River export Arctic Snow Soil Permafrost |
spellingShingle |
Hg River export Arctic Snow Soil Permafrost Sondergaard, Jens Tamstorf, Mikkel Elberling, Bo Larsen, Martin M. Mylius, Maria Rask Lund, Magnus Abermann, Jakob Riget, Frank Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods |
topic_facet |
Hg River export Arctic Snow Soil Permafrost |
description |
Riverine mercury (Hg) export dynamics from the Zackenberg River Basin (ZRB) in Northeast Greenland were studied for the period 2009-2013. Dissolved and sediment-bound Hg was measured regularly in the Zackenberg River throughout the periods with running water (June-October) and coupled to water discharge measurements. Also, a few samples of snow, soil, and permafrost were analysed for Hg. Mean concentrations of dissolved and sediment-bound Hg in the river water (+/- SD) were 039 +/- 0.13 and 5.5 +/- 1.4 ng L-1, respectively, and mean concentrations of Hg in the river sediment were 0.033 +/- 0.025 mg kg(-1). Temporal variations in river Hg were mainly associated with snowmelt, sudden erosion events, and outburst floods from a glacier-dammed lake in the upper part of the ZRB. Annual Hg exports from the 514 km(2) ZRB varied from 0.71 to >1.57 kg and the majority (86-96 was associated with sediment-bound Hg. Hg yields from the ZRB varied from 1.4-3.1 g Hg km(-2) yr(-1) and were among the highest yields reported from Arctic river basins. River exports of Hg from ZRB were found to be largely controlled by the frequency, magnitude and timing of the glacial lake outburst floods, which occurred in four of the five years in July-August. Floods accounted for 5 to >10% of the annual water discharge, and up to >31% of the annual Hg export. Also, the winter snowfall and the summer temperatures were found to be important indirect controls on the annual Hg export. The occurrence and timing of glacial lake outburst floods in the ZRB in late summer at the time of maximum soil thaw depth, the location of the glacier in the upper ZRB, and increased thawing of the permafrost in Zackenberg in recent years leading to destabilisation of river banks are considered central factors explaining the high fraction of flood-controlled Hg export in this area. (C) 2015 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Sondergaard, Jens Tamstorf, Mikkel Elberling, Bo Larsen, Martin M. Mylius, Maria Rask Lund, Magnus Abermann, Jakob Riget, Frank |
author_facet |
Sondergaard, Jens Tamstorf, Mikkel Elberling, Bo Larsen, Martin M. Mylius, Maria Rask Lund, Magnus Abermann, Jakob Riget, Frank |
author_sort |
Sondergaard, Jens |
title |
Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods |
title_short |
Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods |
title_full |
Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods |
title_fullStr |
Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods |
title_full_unstemmed |
Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods |
title_sort |
mercury exports from a high-arctic river basin in northeast greenland (74°n) largely controlled by glacial lake outburst floods |
publishDate |
2015 |
url |
https://curis.ku.dk/portal/da/publications/mercury-exports-from-a-higharctic-river-basin-in-northeast-greenland-74n-largely-controlled-by-glacial-lake-outburst-floods(9bf60a56-09bd-4c5f-81de-bdf4dbdb2366).html https://doi.org/10.1016/j.scitotenv.2015.01.097 |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Arctic Dammed Lake Glacial Lake Greenland |
geographic_facet |
Arctic Dammed Lake Glacial Lake Greenland |
genre |
Arctic Arctic glacier Greenland permafrost Zackenberg |
genre_facet |
Arctic Arctic glacier Greenland permafrost Zackenberg |
op_source |
Sondergaard , J , Tamstorf , M , Elberling , B , Larsen , M M , Mylius , M R , Lund , M , Abermann , J & Riget , F 2015 , ' Mercury exports from a High-Arctic river basin in Northeast Greenland (74°N) largely controlled by glacial lake outburst floods ' , Science of the Total Environment , vol. 514 , pp. 83-91 . https://doi.org/10.1016/j.scitotenv.2015.01.097 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.scitotenv.2015.01.097 |
container_title |
Science of The Total Environment |
container_volume |
514 |
container_start_page |
83 |
op_container_end_page |
91 |
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1801371322431832064 |