摘要
末次冰期自 37ka B.P.以来至 9ka B.P.时段内 ,对桂林一带的影响主要是降温及降雨量减少 ,平均气温最低 7～ 9℃ ,比现今低 10～12℃ ,其间虽有波动 ,但未发现有冰川的证据。 9～ 8ka B.P.,桂林气候发生突变 ,在 1ka的时间内 ,平均气温的变化幅度达 12～ 13℃ ;8ka B.P.时桂林年均气温升至 2 1～ 2 2℃ ,比现今高 2～ 3℃ ;3.6 9ka B.P.时 ,气温升到最高 ,年均气温达 2 2～ 2 3℃ ,比现今高 3～ 4℃ ,年均降雨量也相应发生一定的变化。
The influence of the last Glaciation from 37000a B.P. to 9000a B.P. in Guilin area was mainly displayed by the drop in temperature and the reduction of rainfall. Although the evidence of glaciation couldn't be found yet, on the basis of the palaeovegetation, it was estimated that the mean temperature was 7~9℃ or 10~12℃ lower than that of the present. From 9000a B.P. to 8000a B.P., the abrupt change of the climate in Guilin took place, and the annual mean temperature came to 21~22℃ during 1000 years. It was 2~3℃ higher than that of the present. The changing amplitude was 12~13℃. Around 3690a B.P., the annual mean temperature rose to 22~23℃ or 3~4℃ higher than that of the present. The annual rainfall, meanwhile, also changed.
出处
《中国岩溶》
CAS
CSCD
2000年第1期5-12,共8页
Carsologica Sinica
基金
国家自然科学基金项目!(496 32 10 0 )
地矿部"九五"重点科技项目!(95 0 110 4)
关键词
孢粉组合
古植被
古气候重建
气候变化
Sporopollen
Palaeovegetation
Palaeoclimate reconstruction
Guilin
