Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift
Tilting of large lakes due to differential isostatic uplift in the glaciated regions of the Northern Hemisphere is a well-documented process. With the help of accurate digital elevation models and spatial GIS analysis techniques, the resulting hydrological changes, including shifts in the outlets a...
Published in: | Estonian Journal of Earth Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Estonian Academy Publishers
2012
|
Subjects: | |
Online Access: | https://doi.org/10.3176/earth.2012.3.02 https://doaj.org/article/efb67a6f92754148a208aee6aa842be0 |
id |
ftdoajarticles:oai:doaj.org/article:efb67a6f92754148a208aee6aa842be0 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:efb67a6f92754148a208aee6aa842be0 2023-05-15T16:12:09+02:00 Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift Heikki Seppä Matti Tikkanen Jari-Pekka Mäkiaho 2012-08-01T00:00:00Z https://doi.org/10.3176/earth.2012.3.02 https://doaj.org/article/efb67a6f92754148a208aee6aa842be0 EN eng Estonian Academy Publishers http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2012/issue_3/earth-3-2012-149-161.pdf https://doaj.org/toc/1736-4728 https://doaj.org/toc/1736-7557 doi:10.3176/earth.2012.3.02 1736-4728 1736-7557 https://doaj.org/article/efb67a6f92754148a208aee6aa842be0 Estonian Journal of Earth Sciences, Vol 61, Iss 3, Pp 149-161 (2012) glacial isostasy post-glacial uplift lake tilting future projection GIS modelling Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.3176/earth.2012.3.02 2022-12-31T02:47:16Z Tilting of large lakes due to differential isostatic uplift in the glaciated regions of the Northern Hemisphere is a well-documented process. With the help of accurate digital elevation models and spatial GIS analysis techniques, the resulting hydrological changes, including shifts in the outlets and changes in the size and configuration of lakes, can now be mapped and calculated more precisely than before. As a case study to highlight the magnitude of such changes in Fennoscandia, we investigated and reinterpreted the Holocene palaeogeography and palaeohydrology of Lake Pielinen in eastern Finland. This lake is currently 99 km long and located parallel to the direction of land uplift, being thus particularly sensitive to the impacts of tilting. Our results show that the lake was formed at the end of the regional deglaciation, following drainage of a local ice-dammed lake. In its initial stage until 10 200 cal yr BP, the outlet of the newly-formed lake was located in its northwestern end, but the tilting led to a major water level transgression in the basin, eventually causing formation of a new outlet over the southeastern threshold. The lake area was 143 km long and its area was 1998 km2 at the time of formation of the southeastern outlet at 10 200 cal yr BP. The lake level has been regressive throughout the basin during the last 10 200 years. This regression will continue for approximately another 10 000 years until all the glacial isostatic adjustment has occurred, after which Lake Pielinen will be only 89 km long and 565 km2 in area. Article in Journal/Newspaper Fennoscandia Directory of Open Access Journals: DOAJ Articles Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Estonian Journal of Earth Sciences 61 3 149 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacial isostasy post-glacial uplift lake tilting future projection GIS modelling Geology QE1-996.5 |
spellingShingle |
glacial isostasy post-glacial uplift lake tilting future projection GIS modelling Geology QE1-996.5 Heikki Seppä Matti Tikkanen Jari-Pekka Mäkiaho Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift |
topic_facet |
glacial isostasy post-glacial uplift lake tilting future projection GIS modelling Geology QE1-996.5 |
description |
Tilting of large lakes due to differential isostatic uplift in the glaciated regions of the Northern Hemisphere is a well-documented process. With the help of accurate digital elevation models and spatial GIS analysis techniques, the resulting hydrological changes, including shifts in the outlets and changes in the size and configuration of lakes, can now be mapped and calculated more precisely than before. As a case study to highlight the magnitude of such changes in Fennoscandia, we investigated and reinterpreted the Holocene palaeogeography and palaeohydrology of Lake Pielinen in eastern Finland. This lake is currently 99 km long and located parallel to the direction of land uplift, being thus particularly sensitive to the impacts of tilting. Our results show that the lake was formed at the end of the regional deglaciation, following drainage of a local ice-dammed lake. In its initial stage until 10 200 cal yr BP, the outlet of the newly-formed lake was located in its northwestern end, but the tilting led to a major water level transgression in the basin, eventually causing formation of a new outlet over the southeastern threshold. The lake area was 143 km long and its area was 1998 km2 at the time of formation of the southeastern outlet at 10 200 cal yr BP. The lake level has been regressive throughout the basin during the last 10 200 years. This regression will continue for approximately another 10 000 years until all the glacial isostatic adjustment has occurred, after which Lake Pielinen will be only 89 km long and 565 km2 in area. |
format |
Article in Journal/Newspaper |
author |
Heikki Seppä Matti Tikkanen Jari-Pekka Mäkiaho |
author_facet |
Heikki Seppä Matti Tikkanen Jari-Pekka Mäkiaho |
author_sort |
Heikki Seppä |
title |
Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift |
title_short |
Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift |
title_full |
Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift |
title_fullStr |
Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift |
title_full_unstemmed |
Tilting of Lake Pielinen, eastern Finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift |
title_sort |
tilting of lake pielinen, eastern finland – an example of extreme transgressions and regressions caused by differential post-glacial isostatic uplift |
publisher |
Estonian Academy Publishers |
publishDate |
2012 |
url |
https://doi.org/10.3176/earth.2012.3.02 https://doaj.org/article/efb67a6f92754148a208aee6aa842be0 |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Dammed Lake Tilting |
geographic_facet |
Dammed Lake Tilting |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Estonian Journal of Earth Sciences, Vol 61, Iss 3, Pp 149-161 (2012) |
op_relation |
http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2012/issue_3/earth-3-2012-149-161.pdf https://doaj.org/toc/1736-4728 https://doaj.org/toc/1736-7557 doi:10.3176/earth.2012.3.02 1736-4728 1736-7557 https://doaj.org/article/efb67a6f92754148a208aee6aa842be0 |
op_doi |
https://doi.org/10.3176/earth.2012.3.02 |
container_title |
Estonian Journal of Earth Sciences |
container_volume |
61 |
container_issue |
3 |
container_start_page |
149 |
_version_ |
1765997402266796032 |