Project Details
Description
Throughout my Ph.D., I will mainly focus on 10Be in laminated lacustrine sediments but also ice cores.
The potential of sediment records, which has yet to be thoroughly employed, will help us to provide information on three different axes:
1) We will hopefully be able to reconstruct past short-term solar variability (e.g. the ‘11-yr’ cycle) at timescales not reached before.
2) Varved sediments will allow us to investigate sun-climate relationships with no uncertainties in the timing between the different solar and climate proxies.
3) Determining a common signal of 10Be in both ice cores and lake sediments will contribute to synchronizing these different archives and thereby complement information on leads and lags of past climate changes.
In addition, another focus of my project will be to investigate the occurrence frequency of extreme solar events, such as solar flares and coronal mass ejections, by interpreting spikes in ice core Be-10, C-14, and Cl-36 concentrations.
The potential of sediment records, which has yet to be thoroughly employed, will help us to provide information on three different axes:
1) We will hopefully be able to reconstruct past short-term solar variability (e.g. the ‘11-yr’ cycle) at timescales not reached before.
2) Varved sediments will allow us to investigate sun-climate relationships with no uncertainties in the timing between the different solar and climate proxies.
3) Determining a common signal of 10Be in both ice cores and lake sediments will contribute to synchronizing these different archives and thereby complement information on leads and lags of past climate changes.
In addition, another focus of my project will be to investigate the occurrence frequency of extreme solar events, such as solar flares and coronal mass ejections, by interpreting spikes in ice core Be-10, C-14, and Cl-36 concentrations.
| Status | Finished |
|---|---|
| Effective start/end date | 2014/09/01 → 2019/01/18 |
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Cosmogenic radionuclides in environmental archives – A paleo-perspective on space climate and a synchronizing tool for climate records
Mekhaldi, F., 2018 Dec, Lundqua Theses ed. Lund: Lund University. 121 p.Research output: Thesis › Doctoral Thesis (compilation)
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Multiradionuclide evidence for the solar origin of the cosmic-ray events of ᴀᴅ 774/5 and 993/4.
Mekhaldi, F., Muscheler, R., Adolphi, F., Aldahan, A., Beer, J., McConnell, J. R., Possnert, G., Sigl, M., Svensson, A., Synal, H.-A., Welten, K. C. & Woodruff, T. E., 2015, In: Nature Communications. 6, 8611.Research output: Contribution to journal › Article › peer-review
Open Access