青藏高原自然环境受人类干扰相对较小,为利用古孢粉记录重建气候因子提供了可能,高原过去气候因子的重建对于预测未来气候变化趋势有重要意义.通过选取的29条高原化石孢粉记录,利用现代类比法和化石孢粉点与高原气温的函数关系,把化石...青藏高原自然环境受人类干扰相对较小,为利用古孢粉记录重建气候因子提供了可能,高原过去气候因子的重建对于预测未来气候变化趋势有重要意义.通过选取的29条高原化石孢粉记录,利用现代类比法和化石孢粉点与高原气温的函数关系,把化石孢粉点古气温转化为青藏高原古气温,重建了高原全新世1月和7月古气温序列.结果表明：对于1月和7月气温而言,全新世早期（11.5~8.5ka BP）为气温波动上升期;全新世中期（8.5~4.6 ka BP）为全新世大暖期,气温整体高于现代;全新世晚期（4.6 ka BP~至今）又可分为两个阶段,一个是4.6~2.4 ka BP,在此阶段1月和7月气温都有减小的趋势,另一个阶段则是2.4 ka BP至今,气温出现反常的趋势.展开更多
Abstract： The present study is an attempt to apply the concept of plant and pollen indicators to habitat conditions in different soil strata at archaeological site （Lake Qarun）. It revealed a great palaeoenvironmen...Abstract： The present study is an attempt to apply the concept of plant and pollen indicators to habitat conditions in different soil strata at archaeological site （Lake Qarun）. It revealed a great palaeoenvironmental information＇s about habitat changing of Lake Qarun from a humid and wet conditions during the Hellenic Period to reed swampy early Roman, to Nile Flooding middle Roman, to mesophytic habitats Late Roman, also changing to halophytic and salt marshes with presence of Chenopodiaceae at recent time. Using indicator plants and their remains i.e. pollen grains and spores, palynological studies of different soil strata revealed that, presence of 13 pollen and spore types e.g. Lycopodium, Typhaceae type, Juncaceae, Poaceae, Cyperaceae, Caryophyllaceae, Chenopodiaceae, Nymphaeaceae, Fabaceae, Asteraceae, Tamaricaceae, Onagraceae and Lamiaceae. The data obtained were valuable in reconstruct past vegetation and habitats conditions of Lake Qarun during Helleno Roman period.展开更多
文摘青藏高原自然环境受人类干扰相对较小,为利用古孢粉记录重建气候因子提供了可能,高原过去气候因子的重建对于预测未来气候变化趋势有重要意义.通过选取的29条高原化石孢粉记录,利用现代类比法和化石孢粉点与高原气温的函数关系,把化石孢粉点古气温转化为青藏高原古气温,重建了高原全新世1月和7月古气温序列.结果表明：对于1月和7月气温而言,全新世早期（11.5~8.5ka BP）为气温波动上升期;全新世中期（8.5~4.6 ka BP）为全新世大暖期,气温整体高于现代;全新世晚期（4.6 ka BP~至今）又可分为两个阶段,一个是4.6~2.4 ka BP,在此阶段1月和7月气温都有减小的趋势,另一个阶段则是2.4 ka BP至今,气温出现反常的趋势.
文摘Abstract： The present study is an attempt to apply the concept of plant and pollen indicators to habitat conditions in different soil strata at archaeological site （Lake Qarun）. It revealed a great palaeoenvironmental information＇s about habitat changing of Lake Qarun from a humid and wet conditions during the Hellenic Period to reed swampy early Roman, to Nile Flooding middle Roman, to mesophytic habitats Late Roman, also changing to halophytic and salt marshes with presence of Chenopodiaceae at recent time. Using indicator plants and their remains i.e. pollen grains and spores, palynological studies of different soil strata revealed that, presence of 13 pollen and spore types e.g. Lycopodium, Typhaceae type, Juncaceae, Poaceae, Cyperaceae, Caryophyllaceae, Chenopodiaceae, Nymphaeaceae, Fabaceae, Asteraceae, Tamaricaceae, Onagraceae and Lamiaceae. The data obtained were valuable in reconstruct past vegetation and habitats conditions of Lake Qarun during Helleno Roman period.
