Reconstructing past thermal conditions in beach microclimates

Laloë, Jacques‐Olivier; Chivers, William J.; Esteban, Nicole; Hays, Graeme C.

doi:10.1111/gcb.15903

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Reconstructing past thermal conditions in beach microclimates

Jacques‐Olivier Laloë, William J. Chivers, Nicole Esteban

, Graeme C. Hays

Global Change Biology, Volume: 27, Issue: 24, Pages: 6592 - 6601

Swansea University Author: Nicole Esteban

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DOI (Published version): 10.1111/gcb.15903

Abstract

Reconstruction of past conditions provides important information on how ecosystems have been impacted by climate change, but generally for microhabitats worldwide there are no long-term empirical measurements. In these cases, there has been protracted debate about how various large-scale environment...

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Published in:	Global Change Biology
ISSN:	1354-1013 1365-2486
Published:	Wiley 2021
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa58324
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first_indexed	2021-10-22T09:05:32Z
last_indexed	2021-11-16T04:24:42Z
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spelling	2021-11-15T11:25:59.1420804 v2 58324 2021-10-14 Reconstructing past thermal conditions in beach microclimates fb2e760b83b4580e7445092982f1f319 0000-0003-4693-7221 Nicole Esteban Nicole Esteban true false 2021-10-14 SBI Reconstruction of past conditions provides important information on how ecosystems have been impacted by climate change, but generally for microhabitats worldwide there are no long-term empirical measurements. In these cases, there has been protracted debate about how various large-scale environmental proxies can best be used to reconstruct local temperatures. Here we help resolve this debate by examining how well environmental proxies hindcast sand temperatures at nest depths for five sea turtle nesting sites across the world. We link instrumental air temperature and sea surface temperature records with empirical sand temperature observations in the Atlantic (Ascension Island and Cape Verde), the Indian Ocean (Chagos Archipelago), the Caribbean (St Eustatius) and the Pacific (French Polynesia). We found strong correlations between sea surface temperatures, air temperatures and sand temperatures at all our study sites. Furthermore, Granger causality testing shows variations in sea surface temperature and air temperature precede variations in sand temperatures. We found that different proxies (air or sea temperature or a combination of both) predicted mean monthly sand temperatures within <0.5°C of empirical observations. Reconstructions of sand temperatures over the last 170 years reveal a slight warming of temperatures (maximum 0.5°C per century). An analysis of 36 published datasets revealed that the gradient of the relationship between sand temperature and air temperature is relatively constant, suggesting long-term changes in sand temperature could be extended around the world to include nesting sites where there are no empirical measurements of sand temperature. Our approaches are likely to have utility for a range of microhabitats where there is an interest in long-term changes in temperature. Journal Article Global Change Biology 27 24 6592 6601 Wiley 1354-1013 1365-2486 Climate change, Granger causality testing, Hadley SST, microhabit modelling, temperature-dependent sex determiniation 1 12 2021 2021-12-01 10.1111/gcb.15903 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University Fondation Bertarelli. Grant Number: BPMS-2017-4 2021-11-15T11:25:59.1420804 2021-10-14T09:29:27.3070339 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Jacques‐Olivier Laloë 1 William J. Chivers 2 Nicole Esteban 0000-0003-4693-7221 3 Graeme C. Hays 4 58324__21360__5daa36c07bbb420bae3296a3da6762e9.pdf 58324.pdf 2021-10-28T16:52:04.9438683 Output 1126203 application/pdf Accepted Manuscript true 2022-09-24T00:00:00.0000000 true eng
title	Reconstructing past thermal conditions in beach microclimates
spellingShingle	Reconstructing past thermal conditions in beach microclimates Nicole Esteban
title_short	Reconstructing past thermal conditions in beach microclimates
title_full	Reconstructing past thermal conditions in beach microclimates
title_fullStr	Reconstructing past thermal conditions in beach microclimates
title_full_unstemmed	Reconstructing past thermal conditions in beach microclimates
title_sort	Reconstructing past thermal conditions in beach microclimates
author_id_str_mv	fb2e760b83b4580e7445092982f1f319
author_id_fullname_str_mv	fb2e760b83b4580e7445092982f1f319_***_Nicole Esteban
author	Nicole Esteban
author2	Jacques‐Olivier Laloë William J. Chivers Nicole Esteban Graeme C. Hays
format	Journal article
container_title	Global Change Biology
container_volume	27
container_issue	24
container_start_page	6592
publishDate	2021
institution	Swansea University
issn	1354-1013 1365-2486
doi_str_mv	10.1111/gcb.15903
publisher	Wiley
college_str	Faculty of Science and Engineering
hierarchytype
hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str	1
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description	Reconstruction of past conditions provides important information on how ecosystems have been impacted by climate change, but generally for microhabitats worldwide there are no long-term empirical measurements. In these cases, there has been protracted debate about how various large-scale environmental proxies can best be used to reconstruct local temperatures. Here we help resolve this debate by examining how well environmental proxies hindcast sand temperatures at nest depths for five sea turtle nesting sites across the world. We link instrumental air temperature and sea surface temperature records with empirical sand temperature observations in the Atlantic (Ascension Island and Cape Verde), the Indian Ocean (Chagos Archipelago), the Caribbean (St Eustatius) and the Pacific (French Polynesia). We found strong correlations between sea surface temperatures, air temperatures and sand temperatures at all our study sites. Furthermore, Granger causality testing shows variations in sea surface temperature and air temperature precede variations in sand temperatures. We found that different proxies (air or sea temperature or a combination of both) predicted mean monthly sand temperatures within <0.5°C of empirical observations. Reconstructions of sand temperatures over the last 170 years reveal a slight warming of temperatures (maximum 0.5°C per century). An analysis of 36 published datasets revealed that the gradient of the relationship between sand temperature and air temperature is relatively constant, suggesting long-term changes in sand temperature could be extended around the world to include nesting sites where there are no empirical measurements of sand temperature. Our approaches are likely to have utility for a range of microhabitats where there is an interest in long-term changes in temperature.
published_date	2021-12-01T04:14:46Z
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Reconstructing past thermal conditions in beach microclimates

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