Late Quaternary Pollen Records and Climate Significance in Guangzhou

Through the pollen analysis,combined with the informations on dating and sedimentation of two drilling cores located at different deposition-geomorphological area in the northern and southern part of Guangzhou,the deposition environmental and climatic changes since the late Pleistocene in Guangzhou,the Pearl River Delta,are suggested.Pollen records show that the climate during the late Pleistocene changed as below: partially dry-cold,slightly cool-dry,warm-humid,hot-moisture below,partially cool-dry,cold-dry.The obvious influence from the Last Maximum Glaciation resulted in the difference of pollen assemblage characteristics between the Holocene and the late Pleistocene.The climate became generally warm and humid in the Holocene,but being alterated with some minor climatic fluctuation events,e.g.the most obvious partial dry-cool transition around 2250a BP.Two transgressions have affected the delta during the late Pleistocene and the Holocene.Not only the variations of climatic and sea-level changes of two cores are consistent each other,but also a good correspondence between climate and sea-level change is shown.The differences on stratigraphy,sedimentary facies and pollen characteristics of two cores were resulted from the distinctive location,sedimentary environment and the topography of depositional bed.