Speaker
Description
Previous research has revealed that the 10Be record in laminated travertine has significant potential for reconstructing past high-resolution solar activity. However, the depositional processes of atmospheric 10Be into travertine have not been entirely resolved, therefore the methodology for extracting the production signal is not well established. In this study, we present an annually resolved 10Be record from Baishuitai travertine covering 1510-1701 CE, along with environmental proxies, discuss the potential influence of climatic/environmental variations on the travertine 10Be record, and propose an improved correction methodology for extracting the atmospheric 10Be production signal from the travertine. We show that 10Be deposition in travertines has two environmental impacts: the transport efficiency of atmospheric 10Be into travertine and the additional 10Be inflow from overland flow caused by rainfall. We demonstrate that these effects can be corrected based on iron and potassium contents, and the resulting corrected record reasonably agrees with ice-core and tree-ring data, indicating that 10Be in travertine can be a good proxy for probing the past annual solar activity.
| Student Submission | No |
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