Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region
Spring onset is an important phenological observation that is sensitive to modern climate change and can be traced back in geological time. The Late Glacial ( ∼ 14 500–11 700 cal yr BP) spring onset and growing season (growing degree days) dynamics in the eastern Baltic region were reconstructed usi...
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ftcopernicus:oai:publications.copernicus.org:cp98130 2023-05-15T15:10:37+02:00 Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region Amon, Leeli Wagner-Cremer, Friederike Vassiljev, Jüri Veski, Siim 2022-09-14 application/pdf https://doi.org/10.5194/cp-18-2143-2022 https://cp.copernicus.org/articles/18/2143/2022/ eng eng doi:10.5194/cp-18-2143-2022 https://cp.copernicus.org/articles/18/2143/2022/ eISSN: 1814-9332 Text 2022 ftcopernicus https://doi.org/10.5194/cp-18-2143-2022 2022-09-19T16:22:54Z Spring onset is an important phenological observation that is sensitive to modern climate change and can be traced back in geological time. The Late Glacial ( ∼ 14 500–11 700 cal yr BP) spring onset and growing season (growing degree days) dynamics in the eastern Baltic region were reconstructed using the micro-phenological approach based on the dwarf birch ( Betula nana ) subfossil leaf cuticles. The presented study sites, Lake Lielais Svetinu (eastern Latvia) and Lake Kosilase (central Estonia), are located ∼ 200 km apart in the region affected by the south-eastern sector of the Scandinavian Ice Sheet. During the Late Glacial period the region and its biota were influenced by the retreating glacier and the different stages of the Baltic Ice Lake. The plant macrofossil data confirm that the study sites were in different vegetation zones (arctic-to-boreal) during the Late Glacial period. The dynamics of the estimated length of the growing season and spring onset, combined with the regional collection of plant macrofossil records, suggest the importance of local settings to species migration. During the Late Glacial warming period (Bølling–Allerød), a notable spring warming and longer growing season was calculated based on micro-phenology, but the treeline did not extend beyond central Estonia. The comparison of pollen- and chironomid-inferred past temperature estimations with spring onset, growing degree days, and plant macrofossil data shows coherent patterns during the cooler Older Dryas and warmer Bølling–Allerød periods, while suggesting more complicated climate dynamics and possible warmer episodes during the Younger Dryas cold reversal. Text Arctic Betula nana Climate change Dwarf birch Ice Sheet Copernicus Publications: E-Journals Arctic Climate of the Past 18 9 2143 2153 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Spring onset is an important phenological observation that is sensitive to modern climate change and can be traced back in geological time. The Late Glacial ( ∼ 14 500–11 700 cal yr BP) spring onset and growing season (growing degree days) dynamics in the eastern Baltic region were reconstructed using the micro-phenological approach based on the dwarf birch ( Betula nana ) subfossil leaf cuticles. The presented study sites, Lake Lielais Svetinu (eastern Latvia) and Lake Kosilase (central Estonia), are located ∼ 200 km apart in the region affected by the south-eastern sector of the Scandinavian Ice Sheet. During the Late Glacial period the region and its biota were influenced by the retreating glacier and the different stages of the Baltic Ice Lake. The plant macrofossil data confirm that the study sites were in different vegetation zones (arctic-to-boreal) during the Late Glacial period. The dynamics of the estimated length of the growing season and spring onset, combined with the regional collection of plant macrofossil records, suggest the importance of local settings to species migration. During the Late Glacial warming period (Bølling–Allerød), a notable spring warming and longer growing season was calculated based on micro-phenology, but the treeline did not extend beyond central Estonia. The comparison of pollen- and chironomid-inferred past temperature estimations with spring onset, growing degree days, and plant macrofossil data shows coherent patterns during the cooler Older Dryas and warmer Bølling–Allerød periods, while suggesting more complicated climate dynamics and possible warmer episodes during the Younger Dryas cold reversal. |
format |
Text |
author |
Amon, Leeli Wagner-Cremer, Friederike Vassiljev, Jüri Veski, Siim |
spellingShingle |
Amon, Leeli Wagner-Cremer, Friederike Vassiljev, Jüri Veski, Siim Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region |
author_facet |
Amon, Leeli Wagner-Cremer, Friederike Vassiljev, Jüri Veski, Siim |
author_sort |
Amon, Leeli |
title |
Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region |
title_short |
Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region |
title_full |
Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region |
title_fullStr |
Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region |
title_full_unstemmed |
Spring onset and seasonality patterns during the Late Glacial period in the eastern Baltic region |
title_sort |
spring onset and seasonality patterns during the late glacial period in the eastern baltic region |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-2143-2022 https://cp.copernicus.org/articles/18/2143/2022/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Climate change Dwarf birch Ice Sheet |
genre_facet |
Arctic Betula nana Climate change Dwarf birch Ice Sheet |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-18-2143-2022 https://cp.copernicus.org/articles/18/2143/2022/ |
op_doi |
https://doi.org/10.5194/cp-18-2143-2022 |
container_title |
Climate of the Past |
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18 |
container_issue |
9 |
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2143 |
op_container_end_page |
2153 |
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1766341602666610688 |