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您的检索式：作者名="ALDAHAN Ala"
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| 1 | 内蒙古额济纳盆地戈壁10Be暴露年龄与洪积作用的演化显示文摘重建干旱地区洪积成因戈壁的形成历史能够揭示控制洪积作用时空演化的构造、气候变化.对额济纳盆地不同地貌单元的戈壁石英砾石宇宙成因核素10Be浓度的测量和暴露年龄的估算表明,盆地北缘戈壁阿尔泰洪积平原上的戈壁至少在420ka前就已出现;而盆地内黑河流域洪积平原上的戈壁则形成于约190ka以来,并逐步向北和向东现代低海拔、尾闾湖方向发展,这种演化趋势可能是在青藏高原隆升和盆地内构造活动的影响下洪积作用和洪积扇发育空间变化的结果;420ka以来气候冰期/间冰期的冷暖旋回造成的周边高山地区冰川的前进与后退,可能主导了盆地洪积作用的强弱变化和水体的大小,大规模、高能量的洪水主要发生在高山冰雪消融时期(冰消期),可能也是盆地水体最大时期. | 吕延武 顾兆炎 ALDAHAN Ala 张虎才 POSSNERT Goran 雷国良 | 2010 | 科学通报2010，55，27： | 10 |
| 2 | ^(10)Be in quartz gravel from the Gobi Desert and evolutionary history of alluvial sedimentation in the Ejina Basin,Inner Mongolia,China显示文摘Reconstructing the evolutionary history of the Gobi deserts developed from alluvial sediments in arid regions has great significance in unraveling changes in both tectonic activity and climate.However,such work is limited by a lack of suitable dating material preserved in the Gobi Desert,but cosmogenic 10Be has great potential to date the Gobi deserts.In the present study,10Be in quartz gravel from the Gobi deserts of the Ejina Basin in Inner Mongolia of China has been measured to assess exposure ages.Results show that the Gobi Desert in the northern margin of the basin developed 420 ka ago,whereas the Gobi Desert that developed from alluvial plains in the Heihe River drainage basin came about during the last 190 ka.The latter developed gradually northward and eastward to modern terminal lakes of the river.These temporal and spatial variations in the Gobi deserts are a consequence of alluvial processes influenced by Tibetan Plateau uplift and tectonic activities within the Ejina Basin.Possible episodes of Gobi Desert development within the last 420 ka indicate that the advance/retreat of alpine glaciers during glacial/interglacial cycles might have been the dominant factor to influencing the alluvial intensity and water volume in the basin.Intense floods and large water volumes would mainly occur during the short deglacial periods. | LU YanWu GU ZhaoYan ALDAHAN Ala ZHANG HuCai POSSNERT Goran LEI GuoLiang | 2010 | Chinese Science Bulletin2010，55，33： | 6 |
| 3 | A review on speciation of iodine-129 in the environmental and biological samples 显示文摘 | Xiaolin Hou Violeta Hansen Ala Aldahan | 2009 | Analytica Chimica Acta2009，632，2： | 1 |
| 4 | Anthropogenic ^(129)I in seawaters along the north-central part of the English Channel:Levels and tracer applications显示文摘The English Channel(the Channel)represents a major sink and transport pathway of anthropogenic radioactive ^(129)I.Despite this important role,data concerning the distribution of ^(129)I in seawater of the Channel are scarce,and most of existing data are restricted to the eastern part of the Channel.The advection and dispersion of ^(129)I from the French coast toward the central and further the English coast,especially in the Channel west of Cap de La Hague,are not fully investigated.We present results of iodine isotopes( ^(127)I and ^(129)I)analyses of surface water samples collected along the central English Channel in October,2010.The data show high ^(129)I concentrations between Dover Strait and La Hague,followed by a dramatic drop towards the Celtic Sea and reveal the dispersal of ^(129)I towards central and northern part of the Channel.Our observation also implies that the entire British coast is contaminated by ^(129)I. ^(129)I levels in the westernmost English Channel,close to the English coast,may reflect combined influences from La Hague and Sellafield.Evolution of ^(129)I between 2005 and 2010 suggests a strong link to temporal marine discharges from La Hague plant.The discharges from the nuclear reprocessing facility have continued since 2010 and thus an ecological evaluation of ^(129)I radioactive hazards in the environment of the Channel may be needed. | Peng He Zheng Yang Hongying Pang Ala Aldahan Xiaolin Hou Goran Possnert Xiangjun Pei Yi Huang | 2022 | Acta Oceanologica Sinica2022，41，11： | 0 |
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