Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations
The early Holocene cooling, which occurred around 8200 calendar years before present, was a prominent abrupt event around the north Atlantic region. Here, we investigate the timing, duration, magnitude and regional coherence of the event as expressed in carbonate oxygen-isotope records from three la...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1469763 2023-12-24T10:23:10+01:00 Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations Holmes, JA 2016-01-01 text https://discovery.ucl.ac.uk/id/eprint/1469763/8/1-s2.0-S0277379115300366-main.pdf https://discovery.ucl.ac.uk/id/eprint/1469763/ eng eng https://discovery.ucl.ac.uk/id/eprint/1469763/8/1-s2.0-S0277379115300366-main.pdf https://discovery.ucl.ac.uk/id/eprint/1469763/ open Quaternary Science Reviews , 131 (Part B) pp. 341-349. (2016) 8200-year event Oxygen-isotopes Isotope-enabled GCM Early Holocene Ireland Article 2016 ftucl 2023-11-27T13:07:30Z The early Holocene cooling, which occurred around 8200 calendar years before present, was a prominent abrupt event around the north Atlantic region. Here, we investigate the timing, duration, magnitude and regional coherence of the event as expressed in carbonate oxygen-isotope records from three lakes on northwest Europe's Atlantic margin in western Ireland, namely Loch Avolla, Loch Gealáin and Lough Corrib. An abrupt negative oxygen-isotope excursion lasted about 200 years. Comparison of records from three sites suggests that the excursion was primarily the result of a reduction of the oxygen-isotope values of precipitation, which was likely caused by lowered air temperatures, possibly coupled with a change in atmospheric circulation. Comparison of records from two of the lakes (Loch Avolla and Loch Gealáin), which have differing bathymetries, further suggests a reduction in evaporative loss of lake water during the cooling episode. Comparison of climate model experiments with lake-sediment isotope data indicates that effective moisture may have increased along this part of the northeast Atlantic seaboard during the 8200-year climatic event, as lower evaporation compensated for reduced precipitation. Article in Journal/Newspaper North Atlantic Northeast Atlantic University College London: UCL Discovery |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
8200-year event Oxygen-isotopes Isotope-enabled GCM Early Holocene Ireland |
spellingShingle |
8200-year event Oxygen-isotopes Isotope-enabled GCM Early Holocene Ireland Holmes, JA Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations |
topic_facet |
8200-year event Oxygen-isotopes Isotope-enabled GCM Early Holocene Ireland |
description |
The early Holocene cooling, which occurred around 8200 calendar years before present, was a prominent abrupt event around the north Atlantic region. Here, we investigate the timing, duration, magnitude and regional coherence of the event as expressed in carbonate oxygen-isotope records from three lakes on northwest Europe's Atlantic margin in western Ireland, namely Loch Avolla, Loch Gealáin and Lough Corrib. An abrupt negative oxygen-isotope excursion lasted about 200 years. Comparison of records from three sites suggests that the excursion was primarily the result of a reduction of the oxygen-isotope values of precipitation, which was likely caused by lowered air temperatures, possibly coupled with a change in atmospheric circulation. Comparison of records from two of the lakes (Loch Avolla and Loch Gealáin), which have differing bathymetries, further suggests a reduction in evaporative loss of lake water during the cooling episode. Comparison of climate model experiments with lake-sediment isotope data indicates that effective moisture may have increased along this part of the northeast Atlantic seaboard during the 8200-year climatic event, as lower evaporation compensated for reduced precipitation. |
format |
Article in Journal/Newspaper |
author |
Holmes, JA |
author_facet |
Holmes, JA |
author_sort |
Holmes, JA |
title |
Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations |
title_short |
Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations |
title_full |
Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations |
title_fullStr |
Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations |
title_full_unstemmed |
Lake isotope records of the 8200-year cooling event in western Ireland: comparison with model simulations |
title_sort |
lake isotope records of the 8200-year cooling event in western ireland: comparison with model simulations |
publishDate |
2016 |
url |
https://discovery.ucl.ac.uk/id/eprint/1469763/8/1-s2.0-S0277379115300366-main.pdf https://discovery.ucl.ac.uk/id/eprint/1469763/ |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
Quaternary Science Reviews , 131 (Part B) pp. 341-349. (2016) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/1469763/8/1-s2.0-S0277379115300366-main.pdf https://discovery.ucl.ac.uk/id/eprint/1469763/ |
op_rights |
open |
_version_ |
1786196961452359680 |