Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years

Yassine Ait Brahim; Jasper A. Wassenburg; Francisco W. Cruz; Abdelfettah Sifeddine; Denis Scholz; Lhoussaine Bouchaou; Emilie P. Dassié; Klaus P. Jochum; R. Lawrence Edwards; Hai Cheng

doi:10.1038/s41598-018-35498-x

Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years

Yassine Ait Brahim, Jasper A. Wassenburg, Francisco W. Cruz, Abdelfettah Sifeddine, Denis Scholz, Lhoussaine Bouchaou, Emilie P. Dassié, Klaus P. Jochum, R. Lawrence Edwards, Hai Cheng

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Here we present a new composite record from two well-dated speleothem records from two caves in Northern Morocco. The high-resolution record covers the last millennium allowing to detect multi-decadal to centennial periodicities. Over the industrial period, δ¹⁸O values of our speleothems are shown to be dominated by the main mode of decadal variability in the North Atlantic region: the North Atlantic Oscillation (NAO). Statistical analyses confirm the previously reported multi-decadal variability related to the influence of the Atlantic Multidecadal Oscillation (AMO) in the region. High power and persistent centennial-scale periodicities, similar to the Vries-Suess 200-year solar cycle, are observed as well. Indeed, comparison between solar activity reconstructions and our record confirms the in-phase relationship on centennial time-scales. Low δ¹⁸O values, and hence negative phases of NAO that bring precipitation towards the Western Mediterranean, are observed during well-known solar minima periods. The results are consistent with previous models which describe low irradiance as a trigger for southward shifts of precipitation-bearing westerlies during winter.

Original language	English (US)
Article number	17446
Journal	Scientific reports
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41598-018-35498-x
State	Published - Dec 1 2018

Bibliographical note

Funding Information:
This work was sponsored thanks to the National Natural Science Foundation of China grants (NSFC 41731174 and NSFC 41561144003), the German Research Foundation (DFG: WA3532/1-1 and IM44/1) and the U.S. National Science Foundation (NSF Grant 1702816). We would like to express our deep gratitude to Dr. Myriam Khodri for the discussion about NAO and AMO influence in the Western Mediterranean region. We would also like to thank Professor El Hassane Beraaouz and the Associations of Speleologists of Agadir (ASA and ASS) for their help with the field work, Alyne Barros for her help with stable isotope analyses, and Dr. Raimund Muscheler for sharing their solar forcing reconstruction data. We thank the editor and the anonymous reviewers for their constructive comments.

Publisher Copyright:
© 2018, The Author(s).

Publisher link

10.1038/s41598-018-35498-x

Find It

Find It at U of M Libraries

Cite this

Ait Brahim, Y., Wassenburg, J. A., Cruz, F. W., Sifeddine, A., Scholz, D., Bouchaou, L., Dassié, E. P., Jochum, K. P., Edwards, R. L., & Cheng, H. (2018). Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years. Scientific reports, 8(1), [17446]. https://doi.org/10.1038/s41598-018-35498-x

@article{b159df1f23344c2bb230dad31b7f7f8f,

title = "Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years",

abstract = "Here we present a new composite record from two well-dated speleothem records from two caves in Northern Morocco. The high-resolution record covers the last millennium allowing to detect multi-decadal to centennial periodicities. Over the industrial period, δ18O values of our speleothems are shown to be dominated by the main mode of decadal variability in the North Atlantic region: the North Atlantic Oscillation (NAO). Statistical analyses confirm the previously reported multi-decadal variability related to the influence of the Atlantic Multidecadal Oscillation (AMO) in the region. High power and persistent centennial-scale periodicities, similar to the Vries-Suess 200-year solar cycle, are observed as well. Indeed, comparison between solar activity reconstructions and our record confirms the in-phase relationship on centennial time-scales. Low δ18O values, and hence negative phases of NAO that bring precipitation towards the Western Mediterranean, are observed during well-known solar minima periods. The results are consistent with previous models which describe low irradiance as a trigger for southward shifts of precipitation-bearing westerlies during winter.",

author = "{Ait Brahim}, Yassine and Wassenburg, {Jasper A.} and Cruz, {Francisco W.} and Abdelfettah Sifeddine and Denis Scholz and Lhoussaine Bouchaou and Dassi{\'e}, {Emilie P.} and Jochum, {Klaus P.} and Edwards, {R. Lawrence} and Hai Cheng",

note = "Funding Information: This work was sponsored thanks to the National Natural Science Foundation of China grants (NSFC 41731174 and NSFC 41561144003), the German Research Foundation (DFG: WA3532/1-1 and IM44/1) and the U.S. National Science Foundation (NSF Grant 1702816). We would like to express our deep gratitude to Dr. Myriam Khodri for the discussion about NAO and AMO influence in the Western Mediterranean region. We would also like to thank Professor El Hassane Beraaouz and the Associations of Speleologists of Agadir (ASA and ASS) for their help with the field work, Alyne Barros for her help with stable isotope analyses, and Dr. Raimund Muscheler for sharing their solar forcing reconstruction data. We thank the editor and the anonymous reviewers for their constructive comments. Publisher Copyright: {\textcopyright} 2018, The Author(s).",

year = "2018",

month = dec,

day = "1",

doi = "10.1038/s41598-018-35498-x",

language = "English (US)",

volume = "8",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

number = "1",

}

TY - JOUR

T1 - Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years

AU - Ait Brahim, Yassine

AU - Wassenburg, Jasper A.

AU - Cruz, Francisco W.

AU - Sifeddine, Abdelfettah

AU - Scholz, Denis

AU - Bouchaou, Lhoussaine

AU - Dassié, Emilie P.

AU - Jochum, Klaus P.

AU - Edwards, R. Lawrence

AU - Cheng, Hai

N1 - Funding Information: This work was sponsored thanks to the National Natural Science Foundation of China grants (NSFC 41731174 and NSFC 41561144003), the German Research Foundation (DFG: WA3532/1-1 and IM44/1) and the U.S. National Science Foundation (NSF Grant 1702816). We would like to express our deep gratitude to Dr. Myriam Khodri for the discussion about NAO and AMO influence in the Western Mediterranean region. We would also like to thank Professor El Hassane Beraaouz and the Associations of Speleologists of Agadir (ASA and ASS) for their help with the field work, Alyne Barros for her help with stable isotope analyses, and Dr. Raimund Muscheler for sharing their solar forcing reconstruction data. We thank the editor and the anonymous reviewers for their constructive comments. Publisher Copyright: © 2018, The Author(s).

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Here we present a new composite record from two well-dated speleothem records from two caves in Northern Morocco. The high-resolution record covers the last millennium allowing to detect multi-decadal to centennial periodicities. Over the industrial period, δ18O values of our speleothems are shown to be dominated by the main mode of decadal variability in the North Atlantic region: the North Atlantic Oscillation (NAO). Statistical analyses confirm the previously reported multi-decadal variability related to the influence of the Atlantic Multidecadal Oscillation (AMO) in the region. High power and persistent centennial-scale periodicities, similar to the Vries-Suess 200-year solar cycle, are observed as well. Indeed, comparison between solar activity reconstructions and our record confirms the in-phase relationship on centennial time-scales. Low δ18O values, and hence negative phases of NAO that bring precipitation towards the Western Mediterranean, are observed during well-known solar minima periods. The results are consistent with previous models which describe low irradiance as a trigger for southward shifts of precipitation-bearing westerlies during winter.

AB - Here we present a new composite record from two well-dated speleothem records from two caves in Northern Morocco. The high-resolution record covers the last millennium allowing to detect multi-decadal to centennial periodicities. Over the industrial period, δ18O values of our speleothems are shown to be dominated by the main mode of decadal variability in the North Atlantic region: the North Atlantic Oscillation (NAO). Statistical analyses confirm the previously reported multi-decadal variability related to the influence of the Atlantic Multidecadal Oscillation (AMO) in the region. High power and persistent centennial-scale periodicities, similar to the Vries-Suess 200-year solar cycle, are observed as well. Indeed, comparison between solar activity reconstructions and our record confirms the in-phase relationship on centennial time-scales. Low δ18O values, and hence negative phases of NAO that bring precipitation towards the Western Mediterranean, are observed during well-known solar minima periods. The results are consistent with previous models which describe low irradiance as a trigger for southward shifts of precipitation-bearing westerlies during winter.

UR - http://www.scopus.com/inward/record.url?scp=85057554279&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057554279&partnerID=8YFLogxK

U2 - 10.1038/s41598-018-35498-x

DO - 10.1038/s41598-018-35498-x

M3 - Article

C2 - 30487635

AN - SCOPUS:85057554279

SN - 2045-2322

VL - 8

JO - Scientific Reports

JF - Scientific Reports

IS - 1

M1 - 17446

ER -

Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years

Abstract

Bibliographical note

Publisher link

Find It

Other files and links

Fingerprint

Cite this