Figure 3
From: East Asian summer monsoon precipitation variability since the last deglaciation
Comparison of Gonghai Lake EASM record with various other regional and global environmental signals.
(a) Dongge cave speleothem δ18O records17,54. (b) Tree pollen percentages from Qinghai Lake41. (c) Tree pollen percentages from Daihai Lake15. (d) Frequency distribution of Chinese Loess Plateau palaeosol dates40. (e) Synthesized Northern Hemisphere (30°–90°N) temperature record during the last deglaciation36 (magenta line) and Holocene55 (red line). (f) Western subtropical Atlantic 231Pa/230Th record28 (blue circles) and northeast Atlantic sortable silt record29 (cyan triangles), both of which may indicate AMOC strength and synthesized meltwater flux in the Northern Hemisphere26 (blue line) and the rate of sea-level rise from the Laurentide Ice Sheet44 (purple line), demonstrating continuous freshwater input during the last deglaciation and early Holocene, with the intervals of rapid melting during the YD and from 9.5 to 8.5 ka. (g) Pollen-based annual precipitation (PANN) reconstructed from Gonghai Lake (blue line, this study) and similar reconstruction for the past 6 ka from the nearby Tianchi Lake42 (green curve) together with 65°N summer insolation27 (orange line). Black dots at the bottom are twenty-five AMS 14C dates from terrestrial-plant macrofossils with an uncertainty interval of 1σ. The shaded blue bars indicate periods of significantly decreased precipitation. The dashed lines indicate changes in the factors forcing EASM variability.
