Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany
Many German lakes experienced significant water level declines in recent decades that are not fully understood due to the short observation period. At a typical northeastern German groundwater-fed lake with a complex basin morphology, an acoustic sub-bottom profile was analysed together with a trans...
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:44903 2023-05-15T16:37:55+02:00 Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany Dietze, Elisabeth Slowinski, Michal Zawiska, Izabela Veh, Georg Brauer, Achim 2016 https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44903 https://doi.org/10.1111/bor.12190 eng eng https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44903 https://doi.org/10.1111/bor.12190 info:eu-repo/semantics/closedAccess Institut für Geowissenschaften article doc-type:article 2016 ftubpotsdam https://doi.org/10.1111/bor.12190 2022-07-28T20:48:38Z Many German lakes experienced significant water level declines in recent decades that are not fully understood due to the short observation period. At a typical northeastern German groundwater-fed lake with a complex basin morphology, an acoustic sub-bottom profile was analysed together with a transect of five sediment cores, which were correlated using multiple proxies (sediment facies, -XRF, macrofossils, subfossil Cladocera). Shifts in the boundary between sand and mud deposition were controlled by lake level changes, and hence, allowed the quantification of an absolute lake level amplitude of similar to 8m for the Holocene. This clearly exceeded observed modern fluctuations of 1.3m (AD 1973-2010). Past lake level changes were traced continuously using the calcium-record. During high lake levels, massive organic muds were deposited in the deepest lake basin, whereas lower lake levels isolated the sub-basins and allowed carbonate deposition. During the beginning of the Holocene (>9700cal. a BP), lake levels were high, probably due to final melting of permafrost and dead-ice remains. The establishment of water-use intensive Pinus forests caused generally low (3-4m below modern) but fluctuating lake levels (9700-6400cal. a BP). Afterwards, the lake showed an increasing trend and reached a short-term highstand at c.5000cal. a BP (4m above modern). At the transition towards a cooler and wetter late Holocene, forests dominated by Quercus and Fagus and initial human impact probably contributed more positively to groundwater recharge. Lake levels remained high between 3800 and 800cal. a BP, but the lake system was not sensitive enough to record short-term fluctuations during this period. Lake level changes were recorded again when humans profoundly affected the drainage system, land cover and lake trophy. Hence, local Holocene water level changes reflect feedbacks between catchment and vegetation characteristics and human impact superimposed by climate change at multiple temporal scales. Article in Journal/Newspaper Ice permafrost University of Potsdam: publish.UP Lower Lake ENVELOPE(-129.290,-129.290,53.428,53.428) Boreas 45 4 828 845 |
institution |
Open Polar |
collection |
University of Potsdam: publish.UP |
op_collection_id |
ftubpotsdam |
language |
English |
topic |
Institut für Geowissenschaften |
spellingShingle |
Institut für Geowissenschaften Dietze, Elisabeth Slowinski, Michal Zawiska, Izabela Veh, Georg Brauer, Achim Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany |
topic_facet |
Institut für Geowissenschaften |
description |
Many German lakes experienced significant water level declines in recent decades that are not fully understood due to the short observation period. At a typical northeastern German groundwater-fed lake with a complex basin morphology, an acoustic sub-bottom profile was analysed together with a transect of five sediment cores, which were correlated using multiple proxies (sediment facies, -XRF, macrofossils, subfossil Cladocera). Shifts in the boundary between sand and mud deposition were controlled by lake level changes, and hence, allowed the quantification of an absolute lake level amplitude of similar to 8m for the Holocene. This clearly exceeded observed modern fluctuations of 1.3m (AD 1973-2010). Past lake level changes were traced continuously using the calcium-record. During high lake levels, massive organic muds were deposited in the deepest lake basin, whereas lower lake levels isolated the sub-basins and allowed carbonate deposition. During the beginning of the Holocene (>9700cal. a BP), lake levels were high, probably due to final melting of permafrost and dead-ice remains. The establishment of water-use intensive Pinus forests caused generally low (3-4m below modern) but fluctuating lake levels (9700-6400cal. a BP). Afterwards, the lake showed an increasing trend and reached a short-term highstand at c.5000cal. a BP (4m above modern). At the transition towards a cooler and wetter late Holocene, forests dominated by Quercus and Fagus and initial human impact probably contributed more positively to groundwater recharge. Lake levels remained high between 3800 and 800cal. a BP, but the lake system was not sensitive enough to record short-term fluctuations during this period. Lake level changes were recorded again when humans profoundly affected the drainage system, land cover and lake trophy. Hence, local Holocene water level changes reflect feedbacks between catchment and vegetation characteristics and human impact superimposed by climate change at multiple temporal scales. |
format |
Article in Journal/Newspaper |
author |
Dietze, Elisabeth Slowinski, Michal Zawiska, Izabela Veh, Georg Brauer, Achim |
author_facet |
Dietze, Elisabeth Slowinski, Michal Zawiska, Izabela Veh, Georg Brauer, Achim |
author_sort |
Dietze, Elisabeth |
title |
Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany |
title_short |
Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany |
title_full |
Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany |
title_fullStr |
Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany |
title_full_unstemmed |
Multiple drivers of Holocene lake level changes at a lowland lake in northeastern Germany |
title_sort |
multiple drivers of holocene lake level changes at a lowland lake in northeastern germany |
publishDate |
2016 |
url |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44903 https://doi.org/10.1111/bor.12190 |
long_lat |
ENVELOPE(-129.290,-129.290,53.428,53.428) |
geographic |
Lower Lake |
geographic_facet |
Lower Lake |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/44903 https://doi.org/10.1111/bor.12190 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/bor.12190 |
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Boreas |
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45 |
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4 |
container_start_page |
828 |
op_container_end_page |
845 |
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1766028227635052544 |