黄土高原南部下河遗址全新世中期的植被与气候:基于木炭化石记录
发布时间：2019-01-21 07:54
【摘要】：基于黄土高原南部白水县西固乡下河西村下河遗址木炭化石记录的系统分析并结合高精度AMS~(14)C测年,重建了研究区5050~4870cal.aB.P.时段植被特征和古气候要素值。研究结果显示全新世中期沟谷地带发育以栎、青冈为主的阔叶林地,其中包括柿树、枣树等经济型林木。通过所鉴定的10个乔木植物种属的共存因子法分析,获得白水下河地区(35.14°N,109.69°E)5050~4870cal.aB.P.时段的气候要素值。年均温(MAT)为12.9℃,比现在高约1.5℃;年均降水量(MAP)为758.4mm,比现在高约180mm;与现今秦岭南麓东部的陕西镇安地区(33.45°N,109.16°E)的气候环境相当,可能指示了气候带向北纬推移了约1.7°。
[Abstract]:Based on the systematic analysis of charcoal fossil records from Xiguxiang Hexicun Xihe site in Baishui County, southern Loess Plateau, and combined with high accuracy AMS~ (14) C dating, the study area was reconstructed by 5050,4870cal.aB.P. Vegetation characteristics and paleoclimate elements during the period. The results showed that the broad-leaved forest land mainly composed of Quercus and Cyclobalanopsis was developed in the middle Holocene valley area including economic trees such as persimmon and jujube trees. By means of coexisting factor analysis of 10 species of Arbor species identified, the results showed that (35.14 掳NV 109.69 掳E) 5050,4870cal.aB.Pin Baishuixiahe area. The climatic element value of the period. The annual mean temperature of (MAT) is 12.9 鈩，
本文编号：2412454
[Abstract]:Based on the systematic analysis of charcoal fossil records from Xiguxiang Hexicun Xihe site in Baishui County, southern Loess Plateau, and combined with high accuracy AMS~ (14) C dating, the study area was reconstructed by 5050,4870cal.aB.P. Vegetation characteristics and paleoclimate elements during the period. The results showed that the broad-leaved forest land mainly composed of Quercus and Cyclobalanopsis was developed in the middle Holocene valley area including economic trees such as persimmon and jujube trees. By means of coexisting factor analysis of 10 species of Arbor species identified, the results showed that (35.14 掳NV 109.69 掳E) 5050,4870cal.aB.Pin Baishuixiahe area. The climatic element value of the period. The annual mean temperature of (MAT) is 12.9 鈩，
本文编号：2412454
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