Snowmelt layer thickness in varved Lake Kortejärvi sediments
Sediment microfacies, geochemical µ-XRF and X-ray density analyses were conducted on varved sediments from Lake Kortejärvi (eastern Finland) covering the last 2700 years. Varves comprise couplets of detrital and organic sub-layers throughout the complete time-span. Based on their microfacies and str...
Main Authors: | , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2018
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.889369 https://doi.org/10.1594/PANGAEA.889369 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.889369 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.889369 2023-05-15T17:28:32+02:00 Snowmelt layer thickness in varved Lake Kortejärvi sediments Czymzik, Markus Haltia, Eeva Saarinen, Timo Saarni, Saija Brauer, Achim LATITUDE: 63.617000 * LONGITUDE: 28.933000 2018-04-27 text/tab-separated-values, 2696 data points https://doi.pangaea.de/10.1594/PANGAEA.889369 https://doi.org/10.1594/PANGAEA.889369 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.889369 https://doi.org/10.1594/PANGAEA.889369 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Czymzik, Markus; Haltia, Eeva; Saarinen, Timo; Saarni, Saija; Brauer, Achim (2018): Differential North Atlantic control of winter hydroclimate in late Holocene varved sediments of Lake Kortejärvi, eastern Finland. Boreas, https://doi.org/10.1111/bor.12315 AGE Detrital layer thickness Finland Kortejärvi_KJ-B PC Piston corer Dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.889369 https://doi.org/10.1111/bor.12315 2023-01-20T09:10:55Z Sediment microfacies, geochemical µ-XRF and X-ray density analyses were conducted on varved sediments from Lake Kortejärvi (eastern Finland) covering the last 2700 years. Varves comprise couplets of detrital and organic sub-layers throughout the complete time-span. Based on their microfacies and stratigraphic position within a varve as well as comparisons with local discharge and meteorological data, thicker detrital layers are interpreted to reflect intensified snowmelt floods following more humid winters. Detailed comparisons with monthly to annually resolved North Atlantic Oscillation (NAO) indices back to AD 1049 (901 a BP) suggest that multi-decadal increases in snowmelt layer thickness tend to be connected with a more positive phase of the NAO and, consequently, warmer winters. In contrast, distinct centennial intervals of thicker snowmelt layers from -40 to 170, 280 to 460 and 1900 to 2300 a BP as well as around 2600 a BP do not consistently correspond to a particular NAO phase, but coincide with extended sea ice margins and a colder North Atlantic climate, causing intensified and southward shifted westerly cyclones. Our results point to a differential modification of North Atlantic winter hydroclimate working on varying time-scales. Dataset North Atlantic North Atlantic oscillation Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Kortejärvi ENVELOPE(27.917,27.917,65.700,65.700) ENVELOPE(28.933000,28.933000,63.617000,63.617000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AGE Detrital layer thickness Finland Kortejärvi_KJ-B PC Piston corer |
spellingShingle |
AGE Detrital layer thickness Finland Kortejärvi_KJ-B PC Piston corer Czymzik, Markus Haltia, Eeva Saarinen, Timo Saarni, Saija Brauer, Achim Snowmelt layer thickness in varved Lake Kortejärvi sediments |
topic_facet |
AGE Detrital layer thickness Finland Kortejärvi_KJ-B PC Piston corer |
description |
Sediment microfacies, geochemical µ-XRF and X-ray density analyses were conducted on varved sediments from Lake Kortejärvi (eastern Finland) covering the last 2700 years. Varves comprise couplets of detrital and organic sub-layers throughout the complete time-span. Based on their microfacies and stratigraphic position within a varve as well as comparisons with local discharge and meteorological data, thicker detrital layers are interpreted to reflect intensified snowmelt floods following more humid winters. Detailed comparisons with monthly to annually resolved North Atlantic Oscillation (NAO) indices back to AD 1049 (901 a BP) suggest that multi-decadal increases in snowmelt layer thickness tend to be connected with a more positive phase of the NAO and, consequently, warmer winters. In contrast, distinct centennial intervals of thicker snowmelt layers from -40 to 170, 280 to 460 and 1900 to 2300 a BP as well as around 2600 a BP do not consistently correspond to a particular NAO phase, but coincide with extended sea ice margins and a colder North Atlantic climate, causing intensified and southward shifted westerly cyclones. Our results point to a differential modification of North Atlantic winter hydroclimate working on varying time-scales. |
format |
Dataset |
author |
Czymzik, Markus Haltia, Eeva Saarinen, Timo Saarni, Saija Brauer, Achim |
author_facet |
Czymzik, Markus Haltia, Eeva Saarinen, Timo Saarni, Saija Brauer, Achim |
author_sort |
Czymzik, Markus |
title |
Snowmelt layer thickness in varved Lake Kortejärvi sediments |
title_short |
Snowmelt layer thickness in varved Lake Kortejärvi sediments |
title_full |
Snowmelt layer thickness in varved Lake Kortejärvi sediments |
title_fullStr |
Snowmelt layer thickness in varved Lake Kortejärvi sediments |
title_full_unstemmed |
Snowmelt layer thickness in varved Lake Kortejärvi sediments |
title_sort |
snowmelt layer thickness in varved lake kortejärvi sediments |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.889369 https://doi.org/10.1594/PANGAEA.889369 |
op_coverage |
LATITUDE: 63.617000 * LONGITUDE: 28.933000 |
long_lat |
ENVELOPE(27.917,27.917,65.700,65.700) ENVELOPE(28.933000,28.933000,63.617000,63.617000) |
geographic |
Kortejärvi |
geographic_facet |
Kortejärvi |
genre |
North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
North Atlantic North Atlantic oscillation Sea ice |
op_source |
Supplement to: Czymzik, Markus; Haltia, Eeva; Saarinen, Timo; Saarni, Saija; Brauer, Achim (2018): Differential North Atlantic control of winter hydroclimate in late Holocene varved sediments of Lake Kortejärvi, eastern Finland. Boreas, https://doi.org/10.1111/bor.12315 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.889369 https://doi.org/10.1594/PANGAEA.889369 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.889369 https://doi.org/10.1111/bor.12315 |
_version_ |
1766121264954474496 |