期刊
JOURNAL OF PALEOLIMNOLOGY
卷 47, 期 4, 页码 583-600出版社
SPRINGER
DOI: 10.1007/s10933-012-9582-9
关键词
Sedimentology; Paleolimnology; Climate change; Paleoclimate; Numerical methods; Calibration in time
资金
- Swiss National Science Foundation [NF-200021-107598, NF 200020_121869, PBBEP2-126056]
- Chilean Swiss Joint Research Programme [CJRP-1001]
- Swiss National Science Foundation (SNF) [200020_121869, PBBEP2-126056] Funding Source: Swiss National Science Foundation (SNF)
Lake sediment records are underrepresented in comprehensive, quantitative, high-resolution (sub-decadal), multi-proxy climate reconstructions for the past millennium. This is largely a consequence of the difficulty of calibrating biogeochemical lake sediment proxies to meteorological time series (calibration-in-time). Thanks to recent methodological advances, it is now possible. This paper outlines a step-by-step, specifically tailored methodology, with practical suggestions for calibrating and validating biogeochemical proxies from lake sediments to meteorological data. This approach includes: (1) regional climate data; (2) site selection; (3) coring and core selection; (4) core chronology; (5) data acquisition; and (6) data analysis and statistical methods. We present three case studies that used non-varved lake sediments from remote areas in the Central Chilean Andes, where little a priori information was available on the local climate and lakes, or their responses to climate variability. These case studies illustrate the potential value and application of a calibration-in-time approach to non-varved lake sediments for developing quantitative, high-resolution climate reconstructions.
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