Ghent University Academic Bibliography

Advanced

Atlantic forcing of Western Mediterranean winter rain minima during the last 12,000 years

Christoph Zielhofer, William J Fletcher, Steffen Mischke, Marc De Batist UGent, Jennifer FE Campbell, Sebastien Joannin, Rik Tjallingii, Najib El Hamouti, Annett Junginger, Andreas Stele, et al. (2017) QUATERNARY SCIENCE REVIEWS. 157. p.29-51
abstract
The limited availability of high-resolution continuous archives, insufficient chronological control, and complex hydro-climatic forcing mechanisms lead to many uncertainties in palaeo-hydrological reconstructions for the Western Mediterranean. In this study we present a newly recovered 19.63 m long core from Lake Sidi Ali in the North African Middle Atlas, a transition zone of Atlantic, Western Mediterranean and Saharan air mass trajectories. With a multi-proxy approach based on magnetic susceptibility, carbonate and total organic C content: core-scanning and quantitative XRF, stable isotopes of ostracod shells, charcoal counts, Cedrus pollen abundance, and a first set of diatom data, we reconstruct Western Mediterranean hydro-climatic variability, seasonality and forcing mechanisms during the last 12,000 yr. A robust chronological model based on AMS C-14 dated pollen concentrates supports our high resolution multi-proxy study. Long-term trends reveal low lake levels at the end of the Younger Dryas, during the mid-Holocene interval 6.6 to 5.4 cal ka BP, and during the last 3000 years. In contrast, lake levels are mostly high during the Early and Mid-Holocene. The record also shows sub-millennial- to centennial-scale decreases in Western Mediterranean winter rain at 11.4, 10.3, 9.2, 8.2, 7.2, 6.6, 6.0, 5.4, 5.0, 4.4, 3.5, 2.9, 2.2, 1.9, 1.7, 1.5, 1.0, 0.7, and 0.2 cal ka BP. Early Holocene winter rain minima are in phase with cooling events and millennial-scale meltwater discharges in the sub-polar North Atlantic. Our proxy parameters do not show so far a clear impact of Saharan air masses on Mediterranean hydro-climate in North Africa. However, a significant hydro-climatic shift at the end of the African Humid Period (-5 ka) indicates a change in climate forcing mechanisms. The Late Holocene climate variability in the Middle Atlas features a multi-centennial-scale NAO-type pattern, with Atlantic cooling and Western Mediterranean winter rain maxima generally associated with solar minima.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Holocene, Younger Dryas, Winter rain minima, Atlantic forcing, Western Mediterranean, North Atlantic Oscillation (NAO), Seasonality, Solar forcing, Lake sediments, Middle Atlas, Morocco, HOLOCENE CLIMATE VARIABILITY, AFRICAN HUMID PERIOD, NORTH-ATLANTIC, LATE QUATERNARY, MIDDLE ATLAS, SURFACE-TEMPERATURE, VEGETATION DYNAMICS, SOUTHERN SPAIN, YOUNGER DRYAS, FIRE ACTIVITY
journal title
QUATERNARY SCIENCE REVIEWS
Quat. Sci. Rev.
volume
157
pages
29 - 51
Web of Science type
Article
Web of Science id
000393936200003
ISSN
0277-3791
DOI
10.1016/j.quascirev.2016.11.037
language
English
UGent publication?
yes
classification
A1
copyright statement
Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
id
8514479
handle
http://hdl.handle.net/1854/LU-8514479
date created
2017-03-15 19:19:38
date last changed
2017-04-28 08:15:09
@article{8514479,
  abstract     = {The limited availability of high-resolution continuous archives, insufficient chronological control, and complex hydro-climatic forcing mechanisms lead to many uncertainties in palaeo-hydrological reconstructions for the Western Mediterranean. In this study we present a newly recovered 19.63 m long core from Lake Sidi Ali in the North African Middle Atlas, a transition zone of Atlantic, Western Mediterranean and Saharan air mass trajectories. With a multi-proxy approach based on magnetic susceptibility, carbonate and total organic C content: core-scanning and quantitative XRF, stable isotopes of ostracod shells, charcoal counts, Cedrus pollen abundance, and a first set of diatom data, we reconstruct Western Mediterranean hydro-climatic variability, seasonality and forcing mechanisms during the last 12,000 yr. A robust chronological model based on AMS C-14 dated pollen concentrates supports our high resolution multi-proxy study. Long-term trends reveal low lake levels at the end of the Younger Dryas, during the mid-Holocene interval 6.6 to 5.4 cal ka BP, and during the last 3000 years. In contrast, lake levels are mostly high during the Early and Mid-Holocene. The record also shows sub-millennial- to centennial-scale decreases in Western Mediterranean winter rain at 11.4, 10.3, 9.2, 8.2, 7.2, 6.6, 6.0, 5.4, 5.0, 4.4, 3.5, 2.9, 2.2, 1.9, 1.7, 1.5, 1.0, 0.7, and 0.2 cal ka BP. Early Holocene winter rain minima are in phase with cooling events and millennial-scale meltwater discharges in the sub-polar North Atlantic. Our proxy parameters do not show so far a clear impact of Saharan air masses on Mediterranean hydro-climate in North Africa. However, a significant hydro-climatic shift at the end of the African Humid Period (-5 ka) indicates a change in climate forcing mechanisms. The Late Holocene climate variability in the Middle Atlas features a multi-centennial-scale NAO-type pattern, with Atlantic cooling and Western Mediterranean winter rain maxima generally associated with solar minima.},
  author       = {Zielhofer, Christoph and Fletcher, William J and Mischke, Steffen and De Batist, Marc and Campbell, Jennifer FE and Joannin, Sebastien and Tjallingii, Rik and El Hamouti, Najib and Junginger, Annett and Stele, Andreas and Bussmann, Jens and Schneider, Birgit and Lauer, Tobias and Spitzer, Katrin and Strupler, Michael and Brachert, Thomas and Mikdad, Abdeslam},
  issn         = {0277-3791},
  journal      = {QUATERNARY SCIENCE REVIEWS},
  keyword      = {Holocene,Younger Dryas,Winter rain minima,Atlantic forcing,Western Mediterranean,North Atlantic Oscillation (NAO),Seasonality,Solar forcing,Lake sediments,Middle Atlas,Morocco,HOLOCENE CLIMATE VARIABILITY,AFRICAN HUMID PERIOD,NORTH-ATLANTIC,LATE QUATERNARY,MIDDLE ATLAS,SURFACE-TEMPERATURE,VEGETATION DYNAMICS,SOUTHERN SPAIN,YOUNGER DRYAS,FIRE ACTIVITY},
  language     = {eng},
  pages        = {29--51},
  title        = {Atlantic forcing of Western Mediterranean winter rain minima during the last 12,000 years},
  url          = {http://dx.doi.org/10.1016/j.quascirev.2016.11.037},
  volume       = {157},
  year         = {2017},
}

Chicago
Zielhofer, Christoph, William J Fletcher, Steffen Mischke, Marc De Batist, Jennifer FE Campbell, Sebastien Joannin, Rik Tjallingii, et al. 2017. “Atlantic Forcing of Western Mediterranean Winter Rain Minima During the Last 12,000 Years.” Quaternary Science Reviews 157: 29–51.
APA
Zielhofer, C., Fletcher, W. J., Mischke, S., De Batist, M., Campbell, J. F., Joannin, S., Tjallingii, R., et al. (2017). Atlantic forcing of Western Mediterranean winter rain minima during the last 12,000 years. QUATERNARY SCIENCE REVIEWS, 157, 29–51.
Vancouver
1.
Zielhofer C, Fletcher WJ, Mischke S, De Batist M, Campbell JF, Joannin S, et al. Atlantic forcing of Western Mediterranean winter rain minima during the last 12,000 years. QUATERNARY SCIENCE REVIEWS. 2017;157:29–51.
MLA
Zielhofer, Christoph, William J Fletcher, Steffen Mischke, et al. “Atlantic Forcing of Western Mediterranean Winter Rain Minima During the Last 12,000 Years.” QUATERNARY SCIENCE REVIEWS 157 (2017): 29–51. Print.