The non-analogue nature of Pliocene temperature gradients
The strong warming of the North Atlantic and high latitudes in the Pliocene (5.3 – 2.6 million years ago) continually fails to be simulated in climate model simulations. Being the last period of Earth history with higher global temperatures and carbon dioxide levels similar to today, it is an import...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:87717 2023-05-15T15:04:14+02:00 The non-analogue nature of Pliocene temperature gradients Hill, DJ 2015-09-01 text https://eprints.whiterose.ac.uk/87717/ https://eprints.whiterose.ac.uk/87717/7/Hill_Plio_non_analogue_temp_gradients_EPSL_revised_submission.pdf https://doi.org/10.1016/j.epsl.2015.05.044 en eng Elsevier https://eprints.whiterose.ac.uk/87717/7/Hill_Plio_non_analogue_temp_gradients_EPSL_revised_submission.pdf Hill, DJ (2015) The non-analogue nature of Pliocene temperature gradients. Earth and Planetary Science Letters, 425. 232 - 241. ISSN 0012-821X Article NonPeerReviewed 2015 ftleedsuniv https://doi.org/10.1016/j.epsl.2015.05.044 2023-01-30T21:33:50Z The strong warming of the North Atlantic and high latitudes in the Pliocene (5.3 – 2.6 million years ago) continually fails to be simulated in climate model simulations. Being the last period of Earth history with higher global temperatures and carbon dioxide levels similar to today, it is an important target period for palaeoclimate models. One of the key features of the Pliocene climate is the reduced meridional gradients, particularly in the high latitudes of the Northern Hemisphere. Here we show that previously unconsidered palaeogeographic changes (river routing, ocean bathymetry and additional landmass in the modern Barents Sea), in the North Atlantic region can produce significant temperature responses at high latitudes. Along with orbital forcing, this can significantly decrease equator to pole temperature gradients in the Atlantic Ocean. These additional forcings show that the large Arctic warming and significantly reduced temperature gradients in the Pliocene are not analogous to future warming and that careful consideration of all the possible climatic forcings are required to accurately simulate Pliocene climate. Article in Journal/Newspaper Arctic Barents Sea North Atlantic White Rose Research Online (Universities of Leeds, Sheffield & York) Arctic Barents Sea Earth and Planetary Science Letters 425 232 241 |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
The strong warming of the North Atlantic and high latitudes in the Pliocene (5.3 – 2.6 million years ago) continually fails to be simulated in climate model simulations. Being the last period of Earth history with higher global temperatures and carbon dioxide levels similar to today, it is an important target period for palaeoclimate models. One of the key features of the Pliocene climate is the reduced meridional gradients, particularly in the high latitudes of the Northern Hemisphere. Here we show that previously unconsidered palaeogeographic changes (river routing, ocean bathymetry and additional landmass in the modern Barents Sea), in the North Atlantic region can produce significant temperature responses at high latitudes. Along with orbital forcing, this can significantly decrease equator to pole temperature gradients in the Atlantic Ocean. These additional forcings show that the large Arctic warming and significantly reduced temperature gradients in the Pliocene are not analogous to future warming and that careful consideration of all the possible climatic forcings are required to accurately simulate Pliocene climate. |
format |
Article in Journal/Newspaper |
author |
Hill, DJ |
spellingShingle |
Hill, DJ The non-analogue nature of Pliocene temperature gradients |
author_facet |
Hill, DJ |
author_sort |
Hill, DJ |
title |
The non-analogue nature of Pliocene temperature gradients |
title_short |
The non-analogue nature of Pliocene temperature gradients |
title_full |
The non-analogue nature of Pliocene temperature gradients |
title_fullStr |
The non-analogue nature of Pliocene temperature gradients |
title_full_unstemmed |
The non-analogue nature of Pliocene temperature gradients |
title_sort |
non-analogue nature of pliocene temperature gradients |
publisher |
Elsevier |
publishDate |
2015 |
url |
https://eprints.whiterose.ac.uk/87717/ https://eprints.whiterose.ac.uk/87717/7/Hill_Plio_non_analogue_temp_gradients_EPSL_revised_submission.pdf https://doi.org/10.1016/j.epsl.2015.05.044 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea North Atlantic |
genre_facet |
Arctic Barents Sea North Atlantic |
op_relation |
https://eprints.whiterose.ac.uk/87717/7/Hill_Plio_non_analogue_temp_gradients_EPSL_revised_submission.pdf Hill, DJ (2015) The non-analogue nature of Pliocene temperature gradients. Earth and Planetary Science Letters, 425. 232 - 241. ISSN 0012-821X |
op_doi |
https://doi.org/10.1016/j.epsl.2015.05.044 |
container_title |
Earth and Planetary Science Letters |
container_volume |
425 |
container_start_page |
232 |
op_container_end_page |
241 |
_version_ |
1766336044528041984 |