Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia
Abstract In this study, we provide a paleotemperature reconstruction based on periglacial deposits and landforms from the northwest Iberian Peninsula. We describe different types of periglacial deposits and landforms which were considered as paleoenvironmental archives. The occurrence of these landf...
Published in: | Permafrost and Periglacial Processes |
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crwiley:10.1002/ppp.2026 2024-06-02T08:13:04+00:00 Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia Viana‐Soto, Alba Pérez‐Alberti, Augusto Spanish Ministry of Education and Innovation 2019 http://dx.doi.org/10.1002/ppp.2026 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.2026 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2026 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2026 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 30, issue 4, page 374-388 ISSN 1045-6740 1099-1530 journal-article 2019 crwiley https://doi.org/10.1002/ppp.2026 2024-05-06T07:00:26Z Abstract In this study, we provide a paleotemperature reconstruction based on periglacial deposits and landforms from the northwest Iberian Peninsula. We describe different types of periglacial deposits and landforms which were considered as paleoenvironmental archives. The occurrence of these landforms and deposits suggests that mean annual air temperatures must have been of ≤ −2°C for formation of block fields, block slopes and rock glaciers and ≥ 2°C for formation of stratified slope deposits, as indicated by their modern‐day analogs. The information obtained was used to construct paleotemperature maps by estimating temperature in relation to a standard altitudinal gradient. Two phases were differentiated. During the first phase, associated with the Maximum Glacial Advance (MGA) before 30 ka cal BP, the prevailing snow conditions favored the formation of stratified slope deposits and genesis of glaciers in all of the mountain systems, without the presence of permafrost. During the second phase, associated with the Glacial Maximum (GM) between 21 and 25 ka cal BP, colder conditions favored the presence of permafrost and genesis of block fields, block slopes and rock glaciers at elevations above 700 m. Temperature estimations ranged between around +6°C and − 6°C at an elevation of 2,000 m for the first phase, and between +2°C and − 10°C for the second phase. Due to limitations in estimating past climate conditions, the results should be considered as a first approximation to define northwest Iberian Peninsula paleotemperatures for the Late Pleistocene. Article in Journal/Newspaper permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 30 4 374 388 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In this study, we provide a paleotemperature reconstruction based on periglacial deposits and landforms from the northwest Iberian Peninsula. We describe different types of periglacial deposits and landforms which were considered as paleoenvironmental archives. The occurrence of these landforms and deposits suggests that mean annual air temperatures must have been of ≤ −2°C for formation of block fields, block slopes and rock glaciers and ≥ 2°C for formation of stratified slope deposits, as indicated by their modern‐day analogs. The information obtained was used to construct paleotemperature maps by estimating temperature in relation to a standard altitudinal gradient. Two phases were differentiated. During the first phase, associated with the Maximum Glacial Advance (MGA) before 30 ka cal BP, the prevailing snow conditions favored the formation of stratified slope deposits and genesis of glaciers in all of the mountain systems, without the presence of permafrost. During the second phase, associated with the Glacial Maximum (GM) between 21 and 25 ka cal BP, colder conditions favored the presence of permafrost and genesis of block fields, block slopes and rock glaciers at elevations above 700 m. Temperature estimations ranged between around +6°C and − 6°C at an elevation of 2,000 m for the first phase, and between +2°C and − 10°C for the second phase. Due to limitations in estimating past climate conditions, the results should be considered as a first approximation to define northwest Iberian Peninsula paleotemperatures for the Late Pleistocene. |
author2 |
Spanish Ministry of Education and Innovation |
format |
Article in Journal/Newspaper |
author |
Viana‐Soto, Alba Pérez‐Alberti, Augusto |
spellingShingle |
Viana‐Soto, Alba Pérez‐Alberti, Augusto Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia |
author_facet |
Viana‐Soto, Alba Pérez‐Alberti, Augusto |
author_sort |
Viana‐Soto, Alba |
title |
Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia |
title_short |
Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia |
title_full |
Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia |
title_fullStr |
Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia |
title_full_unstemmed |
Periglacial deposits as indicators of paleotemperatures. A case study in the Iberian Peninsula: The mountains of Galicia |
title_sort |
periglacial deposits as indicators of paleotemperatures. a case study in the iberian peninsula: the mountains of galicia |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/ppp.2026 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.2026 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2026 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2026 |
genre |
permafrost Permafrost and Periglacial Processes |
genre_facet |
permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 30, issue 4, page 374-388 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2026 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
30 |
container_issue |
4 |
container_start_page |
374 |
op_container_end_page |
388 |
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1800759705685983232 |