第七届青年地学论坛

To understand the early to mid-Holocene vegetation and climate dynamics on the eastern coast of the Yellow Sea, we obtained a sedimentary core with high-resolution AMS ¹⁴C data from the Gunsan coast in South Korea. The palynological analysis demonstrated that the riverine wetland meadow from 12.1-9.8 cal kyr BP changed to temperate deciduous broad-leaved forest in 9.8-2.8 cal kyr BP. Additionally, the cold climate from 12.1-9.8 cal kyr BP became warmer from 8.5-7.3 cal kyr BP. This was followed by another relatively cold period from 7.3-2.8 cal kyr BP. The temperature change was mainly in response to solar factors. However, there are two relatively humid periods from 12.1-9.8 cal kyr BP and 8.5-7.3 cal kyr BP, which arose for different reasons. The earlier humid period resulted from strong westerlies and a rapidly rising sea level. The later humid period was produced mainly by the strong East Asian summer monsoon and may also be linked to La Niña-like activity. The cold “Younger Dryas” event from 12.0-11.4 cal kyr BP recorded in this study may have been produced by a North Atlantic meltwater pulse. This would have reduced temperatures that were already low due to weak insolation, and the strong winter monsoons would have increased the precipitation.
 

Climate change,Holocene,Pollen,Vegetation,Yellow Sea,‘Younger Dryas’ event