依据南海 ODP1144站下段 (2 2 5 .7— 5 0 1.3m,ca.0 .36— 1.0 2 Ma)碳屑、孢粉记录 ,将 1144站下段 2 2 5 .7—5 0 1.3m划分 19个碳屑、孢粉组合带 (11— 2 9) ,并分别与氧同位素 11— 2 9期 (MIS11— 2 9)相对应。冰期时 ,草本植物花粉和碳屑总沉积率增加 ,气候干燥 ,天然火的强度较大 ;冰期 MIS2 4,大陆内部及冰期出露的大陆架上的天然火灾强度相对最弱 ;而冰期 MIS12 ,大陆内部及冰期出露的大陆架上的天然火灾强度相对最强 ;间冰期气候湿润 ,草本花粉和碳屑总沉积率降低。一方面由于间冰期海平面上升 ,大陆架被淹没 ,导致碳屑来源减少 ;另一方面亦反映天然火灾强度减低。间冰期 MIS17,2 5和 2 7碳屑沉积率分别较冰期 MIS18,2 4及 2 6略高 ,推测间冰期 MIS17,2 5和 2 7冬季风强度仍相对较强 ,大陆内部天然火灾强度亦相对较强。 According to the records of the carbon and sporopollen in the lower part of ODP 1144 station of the South China Sea (22.5-7.5-0.1.3m, ca.0.36-1.02 Ma), the lower part of 1144 station is divided into 2 5 .7-5 0 1.3m Each of the carbonaceous and sporopollen assemblages (11-2 29) corresponds to the oxygen isotope 11-29 (MIS11-2 9). During the glacial period, the total deposition rate of herbaceous pollen and carbon debris increased, the climate was dry, and the intensity of natural fire was larger. During the glacial period MIS2 4, the natural fire intensity on the continental shelf exposed in the continental shelf and the ice period was relatively weakest. On the glacial MIS12, The natural fire intensity on the continental shelf exposed in the interior and in the glacial period was the strongest. The interglacial climate was moist, and the total deposition rate of herbaceous pollen and carbon debris decreased. On the one hand, due to the rising sea level in the interglacial period, the continental shelf was submerged, leading to a decrease in the sources of carbon debris; on the other hand, it also reflected a decrease in the intensity of natural fire. The interglacial MIS17, 25 and 27 sedimentary rates are slightly higher than those of MIS18, 24 and 26 respectively. It is inferred that the winter monsoon intensities of MIS17, 25 and 27 in the interglacial period are still relatively strong and the intensity of natural fire in the mainland Relatively strong.