Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900
During the period of instrumental records, the North Atlantic Oscillation (NAO) has strongly influenced inter-annual precipitation variations in the western Mediterranean, while some eastern parts of the basin have shown an anti-phase relationship in precipitation and atmospheric pressure. Here we e...
Published in: | Global and Planetary Change |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2012
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.gloplacha.2011.11.002 |
id |
fteawag:oai:dora:eawag_6916 |
---|---|
record_format |
openpolar |
spelling |
fteawag:oai:dora:eawag_6916 2024-09-15T18:23:05+00:00 Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900 Roberts, Neil Moreno, Ana Valero-Garcés, Blas L. Corella, Juan Pablo Jones, Matthew Allcock, Samantha Woodbridge, Jessie Morellón, Mario Luterbacher, Juerg Xoplaki, Elena Türkeş, Murat 2012 https://doi.org/10.1016/j.gloplacha.2011.11.002 eng eng Elsevier Global and Planetary Change--Glob. Planet. Chang.--journals:1163--0921-8181-- eawag:6916 journal id: journals:1163 issn: 0921-8181 e-issn: ut: 000301750700005 local: 15384 scopus: 2-s2.0-84856726982 doi:10.1016/j.gloplacha.2011.11.002 uri: pmid: Mediterranean Medieval Climate Anomaly Little Ice Age palaeolimnology North Atlantic Oscillation teleconnection patterns Text Journal Article 2012 fteawag https://doi.org/10.1016/j.gloplacha.2011.11.002 2024-08-05T03:04:28Z During the period of instrumental records, the North Atlantic Oscillation (NAO) has strongly influenced inter-annual precipitation variations in the western Mediterranean, while some eastern parts of the basin have shown an anti-phase relationship in precipitation and atmospheric pressure. Here we explore how the NAO and other atmospheric circulation modes operated over the longer timescales of the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA). High-resolution palaeolimnological evidence from opposite ends of the Mediterranean basin, supplemented by other palaeoclimate data, is used to track shifts in regional hydro-climatic conditions. Multiple geochemical, sedimentological, isotopic and palaeoecological proxies from Estanya and Montcortés lakes in northeast Spain and Nar lake in central Turkey have been cross-correlated at decadal time intervals since AD 900. These dryland lakes capture sensitively changes in precipitation/evaporation (P/E) balance by adjustments in water level and salinity, and are especially valuable for reconstructing variability over decadal–centennial timescales. Iberian lakes show lower water levels and higher salinities during the 11th to 13th centuries synchronous with the MCA and generally more humid conditions during the 'LIA' (15th–19th centuries). This pattern is also clearly evident in tree-ring records from Morocco and from marine cores in the western Mediterranean Sea. In the eastern Mediterranean, palaeoclimatic records from Turkey, Greece and the Levant show generally drier hydro-climatic conditions during the LIA and a wetter phase during the MCA. This implies that a bipolar climate see-saw has operated in the Mediterranean for the last 1100 years. However, while western Mediterranean aridity appears consistent with persistent positive NAO state during the MCA, the pattern is less clear in the eastern Mediterranean. Here the strongest evidence for higher winter season precipitation during the MCA comes from central Turkey in the northeastern sector of the ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation DORA Eawag Global and Planetary Change 84-85 23 34 |
institution |
Open Polar |
collection |
DORA Eawag |
op_collection_id |
fteawag |
language |
English |
topic |
Mediterranean Medieval Climate Anomaly Little Ice Age palaeolimnology North Atlantic Oscillation teleconnection patterns |
spellingShingle |
Mediterranean Medieval Climate Anomaly Little Ice Age palaeolimnology North Atlantic Oscillation teleconnection patterns Roberts, Neil Moreno, Ana Valero-Garcés, Blas L. Corella, Juan Pablo Jones, Matthew Allcock, Samantha Woodbridge, Jessie Morellón, Mario Luterbacher, Juerg Xoplaki, Elena Türkeş, Murat Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900 |
topic_facet |
Mediterranean Medieval Climate Anomaly Little Ice Age palaeolimnology North Atlantic Oscillation teleconnection patterns |
description |
During the period of instrumental records, the North Atlantic Oscillation (NAO) has strongly influenced inter-annual precipitation variations in the western Mediterranean, while some eastern parts of the basin have shown an anti-phase relationship in precipitation and atmospheric pressure. Here we explore how the NAO and other atmospheric circulation modes operated over the longer timescales of the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA). High-resolution palaeolimnological evidence from opposite ends of the Mediterranean basin, supplemented by other palaeoclimate data, is used to track shifts in regional hydro-climatic conditions. Multiple geochemical, sedimentological, isotopic and palaeoecological proxies from Estanya and Montcortés lakes in northeast Spain and Nar lake in central Turkey have been cross-correlated at decadal time intervals since AD 900. These dryland lakes capture sensitively changes in precipitation/evaporation (P/E) balance by adjustments in water level and salinity, and are especially valuable for reconstructing variability over decadal–centennial timescales. Iberian lakes show lower water levels and higher salinities during the 11th to 13th centuries synchronous with the MCA and generally more humid conditions during the 'LIA' (15th–19th centuries). This pattern is also clearly evident in tree-ring records from Morocco and from marine cores in the western Mediterranean Sea. In the eastern Mediterranean, palaeoclimatic records from Turkey, Greece and the Levant show generally drier hydro-climatic conditions during the LIA and a wetter phase during the MCA. This implies that a bipolar climate see-saw has operated in the Mediterranean for the last 1100 years. However, while western Mediterranean aridity appears consistent with persistent positive NAO state during the MCA, the pattern is less clear in the eastern Mediterranean. Here the strongest evidence for higher winter season precipitation during the MCA comes from central Turkey in the northeastern sector of the ... |
format |
Article in Journal/Newspaper |
author |
Roberts, Neil Moreno, Ana Valero-Garcés, Blas L. Corella, Juan Pablo Jones, Matthew Allcock, Samantha Woodbridge, Jessie Morellón, Mario Luterbacher, Juerg Xoplaki, Elena Türkeş, Murat |
author_facet |
Roberts, Neil Moreno, Ana Valero-Garcés, Blas L. Corella, Juan Pablo Jones, Matthew Allcock, Samantha Woodbridge, Jessie Morellón, Mario Luterbacher, Juerg Xoplaki, Elena Türkeş, Murat |
author_sort |
Roberts, Neil |
title |
Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900 |
title_short |
Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900 |
title_full |
Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900 |
title_fullStr |
Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900 |
title_full_unstemmed |
Palaeolimnological evidence for an east-west climate see-saw in the Mediterranean since AD 900 |
title_sort |
palaeolimnological evidence for an east-west climate see-saw in the mediterranean since ad 900 |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://doi.org/10.1016/j.gloplacha.2011.11.002 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
Global and Planetary Change--Glob. Planet. Chang.--journals:1163--0921-8181-- eawag:6916 journal id: journals:1163 issn: 0921-8181 e-issn: ut: 000301750700005 local: 15384 scopus: 2-s2.0-84856726982 doi:10.1016/j.gloplacha.2011.11.002 uri: pmid: |
op_doi |
https://doi.org/10.1016/j.gloplacha.2011.11.002 |
container_title |
Global and Planetary Change |
container_volume |
84-85 |
container_start_page |
23 |
op_container_end_page |
34 |
_version_ |
1810463202217033728 |