Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period
We present a magnesium (Mg) and strontium (Sr) record from an aragonitic speleothem (Grotte de Piste, Morocco, 34°N; 04°W) providing a reconstruction of effective rainfall from 619 to 1962 AD. The corresponding drip site was monitored over 2 yr for drip water Mg/Ca and Sr/Ca ratios. Results show ev...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://oceanrep.geomar.de/id/eprint/21925/ https://oceanrep.geomar.de/id/eprint/21925/1/Wassenburg.pdf https://doi.org/10.1016/j.epsl.2013.05.048 |
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ftoceanrep:oai:oceanrep.geomar.de:21925 2023-05-15T17:29:29+02:00 Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period Wassenburg, J. A. Immenhauser, A. Richter, D. K. Niedermayr, A. Riechelmann, S. Fietzke, Jan Scholz, D. Jochum, K. P. Fohlmeister, J. Schröder-Ritzrau, A. Sabaoui, A. Riechelmann, D. F. C. Schneider, L. Esper, J. 2013 text https://oceanrep.geomar.de/id/eprint/21925/ https://oceanrep.geomar.de/id/eprint/21925/1/Wassenburg.pdf https://doi.org/10.1016/j.epsl.2013.05.048 en eng Elsevier https://oceanrep.geomar.de/id/eprint/21925/1/Wassenburg.pdf Wassenburg, J. A., Immenhauser, A., Richter, D. K., Niedermayr, A., Riechelmann, S., Fietzke, J. , Scholz, D., Jochum, K. P., Fohlmeister, J., Schröder-Ritzrau, A., Sabaoui, A., Riechelmann, D. F. C., Schneider, L. and Esper, J. (2013) Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period. Earth and Planetary Science Letters, 375 . pp. 291-302. DOI 10.1016/j.epsl.2013.05.048 <https://doi.org/10.1016/j.epsl.2013.05.048>. doi:10.1016/j.epsl.2013.05.048 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.1016/j.epsl.2013.05.048 2023-04-07T15:10:11Z We present a magnesium (Mg) and strontium (Sr) record from an aragonitic speleothem (Grotte de Piste, Morocco, 34°N; 04°W) providing a reconstruction of effective rainfall from 619 to 1962 AD. The corresponding drip site was monitored over 2 yr for drip water Mg/Ca and Sr/Ca ratios. Results show evidence for prior aragonite precipitation, which can explain negative correlations between speleothem Mg and Sr concentrations. The data shown here have important climate implications concerning the evolution of the North Atlantic Oscillation (NAO). A comparison of the stalagmite data from Grotte de Piste with an updated tree ring based drought reconstruction from Morocco and other NAO related proxy records confirms that the Medieval Warm Period (MWP) was dominated by NAO+ conditions. The stalagmite record and multiple proxy records from the Iberian Peninsula, however, suggest that considerable rainfall variability occurred during the MWP. This implies that the NAO has been more variable during the MWP than formerly suggested. Article in Journal/Newspaper North Atlantic North Atlantic oscillation OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Earth and Planetary Science Letters 375 291 302 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
We present a magnesium (Mg) and strontium (Sr) record from an aragonitic speleothem (Grotte de Piste, Morocco, 34°N; 04°W) providing a reconstruction of effective rainfall from 619 to 1962 AD. The corresponding drip site was monitored over 2 yr for drip water Mg/Ca and Sr/Ca ratios. Results show evidence for prior aragonite precipitation, which can explain negative correlations between speleothem Mg and Sr concentrations. The data shown here have important climate implications concerning the evolution of the North Atlantic Oscillation (NAO). A comparison of the stalagmite data from Grotte de Piste with an updated tree ring based drought reconstruction from Morocco and other NAO related proxy records confirms that the Medieval Warm Period (MWP) was dominated by NAO+ conditions. The stalagmite record and multiple proxy records from the Iberian Peninsula, however, suggest that considerable rainfall variability occurred during the MWP. This implies that the NAO has been more variable during the MWP than formerly suggested. |
format |
Article in Journal/Newspaper |
author |
Wassenburg, J. A. Immenhauser, A. Richter, D. K. Niedermayr, A. Riechelmann, S. Fietzke, Jan Scholz, D. Jochum, K. P. Fohlmeister, J. Schröder-Ritzrau, A. Sabaoui, A. Riechelmann, D. F. C. Schneider, L. Esper, J. |
spellingShingle |
Wassenburg, J. A. Immenhauser, A. Richter, D. K. Niedermayr, A. Riechelmann, S. Fietzke, Jan Scholz, D. Jochum, K. P. Fohlmeister, J. Schröder-Ritzrau, A. Sabaoui, A. Riechelmann, D. F. C. Schneider, L. Esper, J. Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period |
author_facet |
Wassenburg, J. A. Immenhauser, A. Richter, D. K. Niedermayr, A. Riechelmann, S. Fietzke, Jan Scholz, D. Jochum, K. P. Fohlmeister, J. Schröder-Ritzrau, A. Sabaoui, A. Riechelmann, D. F. C. Schneider, L. Esper, J. |
author_sort |
Wassenburg, J. A. |
title |
Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period |
title_short |
Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period |
title_full |
Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period |
title_fullStr |
Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period |
title_full_unstemmed |
Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period |
title_sort |
moroccan speleothem and tree ring records suggest a variable positive state of the north atlantic oscillation during the medieval warm period |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/21925/ https://oceanrep.geomar.de/id/eprint/21925/1/Wassenburg.pdf https://doi.org/10.1016/j.epsl.2013.05.048 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://oceanrep.geomar.de/id/eprint/21925/1/Wassenburg.pdf Wassenburg, J. A., Immenhauser, A., Richter, D. K., Niedermayr, A., Riechelmann, S., Fietzke, J. , Scholz, D., Jochum, K. P., Fohlmeister, J., Schröder-Ritzrau, A., Sabaoui, A., Riechelmann, D. F. C., Schneider, L. and Esper, J. (2013) Moroccan speleothem and tree ring records suggest a variable positive state of the North Atlantic Oscillation during the Medieval Warm Period. Earth and Planetary Science Letters, 375 . pp. 291-302. DOI 10.1016/j.epsl.2013.05.048 <https://doi.org/10.1016/j.epsl.2013.05.048>. doi:10.1016/j.epsl.2013.05.048 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2013.05.048 |
container_title |
Earth and Planetary Science Letters |
container_volume |
375 |
container_start_page |
291 |
op_container_end_page |
302 |
_version_ |
1766123629506985984 |