Comparison of pollen records with the δ<sup>18</sup>O records from Greenland ice core and Chinese stalagmite.

Abstract

<p>(a) The δ<sup>18</sup>O records of the Greenland ice cores [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0146261#pone.0146261.ref047" target="_blank">47</a>,<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0146261#pone.0146261.ref048" target="_blank">48</a>] (the light blue line is NGRIP δ<sup>18</sup>O profile, the dark blue line is GRIP δ<sup>18</sup>O profile), (b) the common logarithm transformation of pollen-based Temperature index (to outweigh strong variations caused by percentage maxima of <i>Betula</i> and Cyperaceae), (c) pollen percentages of arboreal (green line), steppe (orange line) and meadow (blue line) taxa, (d) pollen-based Moisture index, (e) the stalagmite δ<sup>18</sup>O records from Hulu cave [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0146261#pone.0146261.ref010" target="_blank">10</a>].</p

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