Clim. Past Discuss.,
https://doi.org/10.5194/cp-2017-91
Manuscript under review for journal Clim. Past Discussion started: 11 July 2017Author(s)
Mohammed Allan1, Adrien Deliège2, Sophie Verheyden3, Samuel Nicolay2, Yves Quinif4, 5 Nathalie Fagel1
1AGEs, Département de Géologie, Université de Liège, Allée du 6 Août, B18 B-4000, Liège, Belgium
2 Institut de Mathématique, Université de Liège, Allée de la Découverte 12, B37 B-4000 Liège, Belgium
4Université de Mons, Rue de Houdain9, B-7000 Mons, Belgium Correspondence to: M. Allan (mohammed.allan@ ulg.ac.be)
Abstract. We present a decadal-centennial scale Holocene climate record based on trace elements contents from a 65 cm stalagmite (“Père Noël”) from Belgian Père Noël cave. Père Noël (PN) stalagmite covers the last 12.7 ka according to U/Th dating. High spatial resolution measurements of trace elements (Sr, Ba, Mg and Al) were done by Laser- Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS).
Trace elements profiles were interpreted as environmental and climate changes in the Han-sur-Lesse region. Power spectrum estimators and continuous wavelet 15 transform were applied on trace elements time series to detect any statistically significant periodicities in the PN stalagmite. Spectral analyses reveal decadal to millennial periodicities (i.e., 68-75, 133-136, 198-209, 291-358, 404- 602,912-1029 and 2365-2670 yr) in the speleothem record.
Results were compared to reconstructed sunspot number data to determine whether solar signal is presents in PN speleothem. The occurrence of significant solar periodicities (i.e., cycles of Gleissberg, de Vries, unnamed 500 years, Eddy and Hallstat) supports for an impact of solar forcing on 20 PN speleothem trace elements contents. Moreover, several intervals of significant rapid climate change were detected during the Holocene at 10.3, 9.3-9.5, around 8.2, 6.4-6.2, 4.7-4.5, and around 2.7 ka BP. Those intervals are similar to the cold events evidenced in different natural paleoclimate archivers, suggesting common climate forcing mechanisms related to changes in solar irradiance.
https://doi.org/10.5194/cp-2017-91
Manuscript under review for journal Clim. Past Discussion started: 11 July 2017Author(s)
Mohammed Allan1, Adrien Deliège2, Sophie Verheyden3, Samuel Nicolay2, Yves Quinif4, 5 Nathalie Fagel1
1AGEs, Département de Géologie, Université de Liège, Allée du 6 Août, B18 B-4000, Liège, Belgium
2 Institut de Mathématique, Université de Liège, Allée de la Découverte 12, B37 B-4000 Liège, Belgium
4Université de Mons, Rue de Houdain9, B-7000 Mons, Belgium Correspondence to: M. Allan (mohammed.allan@ ulg.ac.be)
Abstract. We present a decadal-centennial scale Holocene climate record based on trace elements contents from a 65 cm stalagmite (“Père Noël”) from Belgian Père Noël cave. Père Noël (PN) stalagmite covers the last 12.7 ka according to U/Th dating. High spatial resolution measurements of trace elements (Sr, Ba, Mg and Al) were done by Laser- Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS).
Trace elements profiles were interpreted as environmental and climate changes in the Han-sur-Lesse region. Power spectrum estimators and continuous wavelet 15 transform were applied on trace elements time series to detect any statistically significant periodicities in the PN stalagmite. Spectral analyses reveal decadal to millennial periodicities (i.e., 68-75, 133-136, 198-209, 291-358, 404- 602,912-1029 and 2365-2670 yr) in the speleothem record.
Results were compared to reconstructed sunspot number data to determine whether solar signal is presents in PN speleothem. The occurrence of significant solar periodicities (i.e., cycles of Gleissberg, de Vries, unnamed 500 years, Eddy and Hallstat) supports for an impact of solar forcing on 20 PN speleothem trace elements contents. Moreover, several intervals of significant rapid climate change were detected during the Holocene at 10.3, 9.3-9.5, around 8.2, 6.4-6.2, 4.7-4.5, and around 2.7 ka BP. Those intervals are similar to the cold events evidenced in different natural paleoclimate archivers, suggesting common climate forcing mechanisms related to changes in solar irradiance.
