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Solar Output Controls Periodicity in Lake Productivity and Wetness at Southernmost South America

Title data

Pérez-Rodríguez, Marta ; Gilfedder, Ben ; Hermanns, Yvonne-Marie ; Biester, Harald:
Solar Output Controls Periodicity in Lake Productivity and Wetness at Southernmost South America.
In: Scientific Reports. Vol. 6 (November 2016) . - No. 37521.
ISSN 2045-2322
DOI: https://doi.org/10.1038/srep37521

Abstract in another language

Cyclic changes in total solar irradiance (TSI) during the Holocene are known to affect globalclimatic conditions and cause cyclic climatic oscillations, e.g., Bond events and related changes ofenvironmental conditions. However, the processes how changes in TSI affect climate and environmentof the Southern Hemisphere, especially in southernmost South America, a key area for the globalclimate, are still poorly resolved. Here we show that highly sensitive proxies for aquatic productivityderived from sediments of a lake near the Chilean South Atlantic coast (53 °S) strongly match thecyclic changes in TSI throughout the Holocene. Intra-lake productivity variations show a periodicity of~200–240 years coherent with the time series of TSI-controlled cosmogenic nuclide 10Be production. Inaddition TSI dependent periodicity of Bond events (~1500 years) appear to control wetness at the LHsite indicated by mineral matter erosion from the catchment to the lake assumingly through shifts ofthe position of the southern westerly wind belt. Thus, both intra-lake productivity and wetness at thesouthernmost South America are directly or indirectly controlled by TSI.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER138628
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 18 Jan 2018 09:10
Last Modified: 18 Jan 2018 09:10
URI: https://eref.uni-bayreuth.de/id/eprint/41388