Figure 1
From: Impact of climate change and human activity on soil landscapes over the past 12,300 years
(a) Cultivated and ruderal plant taxa in % in Lake Dojran sediment succession. Data from Thienemann et al.30; copyright given to editor. (b) Total tree pollen in Lake Dojran sediment succession. Data from Thienemann et al.30; copyright given to editor. (c) K and Fe concentrations acquired by X-ray Fluorescence (XRF) scan using an ITRAX core scanner (Cox Analytical Systems, Sweden). Measured counts are a semi-quantitative estimate of the relative concentration. Data from Francke et al.23; copyright is licensed under the Creative Commons Attribution 3.0 License (d) Paleo-climate proxies illustrating short-lived cold/dry events at 8.2 and 4.2 kyr BP: pollen data from N Greece (red curve28), carbon isotope values (δ13C) (black curve) and Mg/Ca ratios (black curve) in a flowstone from N Italy27. (e) Calcium carbonate (CaCO3) concentrations in the same core studied for U and Li isotopes. Data from Francke et al.23; copyright is licensed under the Creative Commons Attribution 3.0 License. CaCO3 concentrations show lake productivity, where high concentrations indicate warm temperatures and low concentrations colder temperatures. (f) Lithium and uranium isotope compositions of Holocene core sediment at Lake Dojran. Error bars are 2 standard error for both lithium and uranium data. External reproducibility for both δ234U and δ7Li is displayed on the left side of the diagram. Error bars for deposition ages are displayed by the horizontal size of the symbol. Grey bands illustrate relatively cool and arid phases, while white bands show warm and wet phases27,28,29. The blue band shows the proposed period of anthropogenic overprint23,26,45.
