Vegetation,fire, and climate history during the last 18 500 cal a BP in south‐western Yunnan Province,China          下载免费PDF全文

Xiayun Xiao  J. I. Shen  Simon G. Haberle  Yong Han  Bin Xue  Enlou Zhang  Sumin Wang  Guobang Tong 《第四纪科学杂志》2015,30(8):859-869

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Widespread,episodic decline of alder (Alnus) during the medieval period in the boreal forest of Europe     

《第四纪科学杂志》2017,32(7):903-907

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A 1300‐year multi‐proxy,high‐resolution record from a rich fen in northern Poland: reconstructing hydrology,land use and climate change     

M. LAMENTOWICZ  M. GAŁKA  K. MILECKA  K. TOBOLSKI  Ł. LAMENTOWICZ  B. FIAŁKIEWICZ‐KOZIEŁ  M. BLAAUW 《第四纪科学杂志》2013,28(6):582-594

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Environmental variability during the Last Interglacial: a new high‐resolution pollen record from Tenaghi Philippon,Greece     

Alice M. Milner  Ulrich C. Müller  Katherine H. Roucoux  Richard E. L. Collier  Jörg Pross  Stavros Kalaitzidis  Kimon Christanis  Polychronis C. Tzedakis 《第四纪科学杂志》2013,28(2):113-117

A new high‐resolution Last Interglacial pollen record from the Tenaghi Philippon peatland, northeast Greece, documents variability in forest composition and cover, which we attribute to changes in temperature and moisture availability. The declining stage of the interglacial was marked by a stepwise decrease in temperate tree populations and culminated in the complete collapse of forest at the onset of the ensuing stadial. The coincidence of the onset of the stepwise declining trend with the increased prominence of North Atlantic ice‐rafting events suggests that ecological thresholds in southern Europe were only crossed once ice rafting events intensified, and implies that changes in North Atlantic ocean circulation were an important contributing factor to the declining temperate forest cover in southern Europe. Our results provide evidence for intra‐interglacial variability in the low mid latitudes and suggest a coupling between the high northern latitudes and the northeast Mediterranean during this interval. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Vegetation and environments since the Last Glacial Maximum in the Southern Tablelands,New South Wales          下载免费PDF全文

GEOFF HOPE 《第四纪科学杂志》2014,29(8):778-788

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湖北旧石器至战国时期(1.15MaBP-278BC)古文化遗址分布与环境演变(英文)   总被引：1，自引：1，他引：0  

李兰  吴立  朱诚  李枫  马春梅 《地理学报(英文版)》2011,21(5):909-925

A total of 1362 archaeological sites from the Paleolithic Age to the Warring States time in Hubei Province increase gradually from west to east and from high land to low land.The number of Paleolithic sites with altitude of 50-500 m account for 78% of the whole,while 71%-95% of sites from the Neolithic Age to the Warring States time mainly distribute at the areas of 0-200 m.The temporal-spatial distribution of archeological sites in this area is affected by two factors.For one thing,the human beings of every period need to choose the first or the second terrace as living sites which are near water source and are easy to withstand flood.Additionally,affecting by the regional tectonic uplift since the Holocene,down cutting of rivers can form new river valley,and lateral erosion and accumulation of river in stable time of tectonic movement can result in increasing of many new terraces.So,the human beings migrated to adapt to the change of terrace location,leading to the sites increase gradually in the lower areas of the central and eastern parts of this province.For other things,the temporal-spatial distribution of archeological sites in this area is affected by the climate condition.The Paleolithic sites mostly distribute in the Hanshui River Valley in northeastern Shiyan,southeast of Jinzhou and east of Jinmen,which is because rivers distributed in higher areas in this period.During the Chengbeixi Culture period,the sites are rare in the quondam Paleolithic sites distribution area,but increase obviously along the Yangtze River near the southwest Yichang.The spore-pollen record of Dajiuhu Basin indicates that only 23 Chengbeixi cultural sites may be related to more precipitation and flood during the Holocene wet and hot period.The Daxi Culture,Qujialing Culture and Shijiahe Culture are corresponding to middle and top of the Dajiuhu spore-pollen Zone Ⅳ,during which the climate is in order as a whole and is propitious to agricultural development.In the Qujialing Culture period,32 of original 34 Daxi cultural sites disappeared,while 90 sites increase abruptly in the higher highlands in the north of Xiangfan-Jinmen-Xiaogan,which may respect with enlarging of water areas.The Chu Culture period is corresponding to Dajiuhu spore-pollen Zone V,which is in warm and dry Holocene phase,but it seems that the climate condition is still propitious to agricultural cultivation and the number of archeological sites increase heavily to 593.In addition,there are the least archaeological sites in the lake areas of southeast Hubei Province because of low-lying topography with altitude of 0-50 m and the severest flood.  相似文献   

辽西城子山遗址夏家店下层文化期农业活动特征及环境效应   总被引：2，自引：1，他引：1       下载免费PDF全文

赵克良  李小强  周新郢  孙楠 《第四纪研究》2011,31(1):8-15

以辽西城子山文化遗存剖面为研究对象,运用花粉、炭屑、炭化种子和果壳等指标,重建城子山地区夏家店下层文化期农业活动特征及环境效应.研究显示城子山原生植被主要为松属针叶林,先民采用"刀耕火种"农业模式毁林开荒,导致原生植被消失以及次生榛属灌丛和杂草增加.城子山剖面中禾本科花粉含量峰值与炭屑浓度峰值相对应,表明先民高强度或频...  相似文献   

内蒙古中部达尔罕茂明安联合旗腾格尔诺尔湖泊 沉积物记录的全新世晚期环境演变   总被引：1，自引：1，他引：0  

赵志丽  王永  姚培毅  迟振卿  关友义 《地质通报》2011,30(8):1251-1255

通过对内蒙古中部腾格尔诺尔湖泊沉积、粒度组成、孢粉组合等特征的综合分析,重建了该地区全新世晚期1700aBP以来的环境演变过程。结果表明,该地区1700aBP以来的气候环境变化可以分为4个阶段:1700～1170aBP,气候温暖较湿润;1170～840aBP,为温干气候期;840～200aBP,气候转为温暖湿润,间有短期的冷干波动;200aBP以来气候以温干为主,晚期气候有向凉干转变的趋势。  相似文献   

双气囊花粉与三垛运动   总被引：1，自引：0，他引：1  

周山富 《地质论评》1994,40(5):436-445

现代山地针叶树的双气囊花粉的散布,沉积作用表明,中新世早期在江苏建湖隆起上,曾有亚高山,中山,其上生长着冷杉,云杉,铁杉等松科植物。地壳运动在上升和下降的过程中,双气囊花粉在内陆盆地完整的地质记录中,应随着地壳上升,山地面积扩大,海拔升高而渐渐增多,并出相相应海拔生长的属和四;在地壳下降和剥蚀夷平的过程中,双气囊花粉等情况则相反。以这个连续沉积剖面中双气囊花粉的变化模式,对比苏北南黄海盆地新,老第  相似文献   

鄂尔多斯盆地北部志丹群喇嘛湾组的孢粉组合及其时代   总被引：2，自引：0，他引：2  

张子福 《西北地质科学》1992,13(1):89-101

所研究的孢子花粉化石产自鄂尔多斯盆地北部志丹群喇嘛湾组,计有53属、74种。根据孢粉组合特征、主要属种地史分布及与已知孢粉组合对比、分析,指出该组时代为早白垩世早中期。此外,作者对喇嘛湾组孢粉植物群所反映的古气候环境做了初步探讨,推测沉积区在喇嘛湾组沉积时受温暖潮湿气候条件的控制,并将该孢粉植物群归于瓦赫拉梅耶夫(Vakhrameev,1978)划分的西伯利亚—加拿大植物区。  相似文献