Trachsel, Mathias; Eggenberger, Urs; Grosjean, Martin; Blass, Alexander; Sturm, Mike (2008). Mineralogy-based quantitative precipitation and temperature reconstructions from annually laminated lake sediments (Swiss Alps) since AD 1580. Geophysical Research Letters, 35(13), L13707. Washington, D.C.: American Geophysical Union 10.1029/2008GL034121
Full text not available from this repository.[1] We present quantitative autumn, summer and annual precipitation and summer temperature reconstructions from proglacial annually laminated Lake Silvaplana, eastern Swiss Alps back to AD 1580. We used X-ray diffraction peak intensity ratios of minerals in the sediment layers (quartz qz, plagioclase pl, amphibole am, mica mi) that are diagnostic for different source areas and hydro-meteorological transport processes in the catchment. XRD data were calibrated with meteorological data (AD 1800/1864–1950) and revealed significant correlations: mi/pl with SON precipitation (r = 0.56, p < 0.05) and MJJAS precipitation (r = 0.66, p < 0.01); qz/mi with MJJAS temperature (r = −0.72, p < 0.01)and qz/am with annual precipitation (r = −0.54, p < 0.05). Geological catchment settings and hydro-meteorological processes provide deterministic explanations for the correlations. Our summer temperature reconstruction reproduces the typical features of past climate variability known from independent data sets. The precipitation reconstructions show a LIA climate moister than today. Exceptionally wet periods in our reconstruction coincide with regional glacier advances.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Geography > Physical Geography > Unit Paleolimnology 10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) 08 Faculty of Science > Institute of Geological Sciences 08 Faculty of Science > Institute of Geography |
UniBE Contributor: |
Trachsel, Mathias, Eggenberger, Urs, Grosjean, Martin, Blass, Alexander |
Subjects: |
500 Science > 550 Earth sciences & geology |
ISSN: |
0094-8276 |
Publisher: |
American Geophysical Union |
Language: |
English |
Submitter: |
Factscience Import |
Date Deposited: |
04 Oct 2013 15:17 |
Last Modified: |
05 Dec 2022 14:23 |
Publisher DOI: |
10.1029/2008GL034121 |
Web of Science ID: |
000257738800005 |
URI: |
https://boris.unibe.ch/id/eprint/34323 (FactScience: 200283) |
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