Late-Holocene (post-4000 years BP) coastal dune development in Northumberland, northeast England
Late-Holocene (post-4000 years BP) coastal dune development in Northumberland, northeast England
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英格兰东北部诺森伯兰郡全新世晚期（距今 4000 年后）沿海沙丘发育
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
A. Wintle
中科院分区：
文献类型：
--
作者：
P. Wilson;J. Orford;J. Knight;S. Braley;A. Wintle
在诺森伯兰郡，英格兰东北部，沿海沙丘系统的近期环境历史，已被检查使用地貌，地层和沉积学技术与放射性碳和红外线激发发光（IRSL）测年。从22个vibracores和三个部分，和沙丘年代学的基础上28 14 C日期，泥炭和土壤有机层，26 IRSL日期从砂层内的钾长石颗粒。几乎所有的沙丘系统与海退海岸线随之下降的相对海平面（RSL）从全新世的峰值，并表明RSL作为一个宏观尺度的控制沙丘的发展。在沙丘固定在陆地沉积物上的地方，沙丘的扩张在性质上可能是海进的或海退的。在近岸海洋沉积物形成沙丘基质的地方，一个海退型沙丘模型似乎是最有可能的。大多数沙丘建设发生在“小冰期”（LIA），可能与特定的气候和形态沉积条件，主要是东风环流时期，更频繁的严重北海风暴，RSL下降，沉积物和住宿空间的可用性。早于LIA的全新世冷间隔的沙丘发育具有有限的空间范围，这表明当时的主要条件存在一些差异。
The recent environmental history of coastal dune systems in Northumberland, northeast England, has been examined using geomorphological, stratigraphical and sedimentological techniques linked to radiocarbon and infrared-stimulated luminescence (IRSL) dating. Stratigraphies were determined from 22 vibracores and three sections, and dune chronology was based on 28 14 C dates, from peat and soil organic horizons, and 26 IRSL dates on K-feldspar grains from within sand layers. Almost all dune systems are associated with regressive shorelines consequent upon a fall in relative sea level (RSL) from its Holocene peak, and indicate RSL functioned as a macroscale control on dune development. Where dunes are anchored on terrestrial sediment, dune expansion may have been either transgressive or regressive in nature. Where near-shore marine sediments form the dune substrate, a regressive (prograding) dune model seems most likely. Most dune building occurred during the ‘Little Ice Age’ (LIA), probably in association with specific climatic and morphosedimentary conditions, principally periods of easterly circulation, a greater frequency of severe North Sea storms, RSL fall, and sediment and accommodation space availability. Dune development in Holocene cool intervals earlier than the LIA was of limited spatial extent, suggesting some differences in prevailing conditions at those times.
影响因子：
8.3
作者：
STUIVER, M;REIMER, PJ
通讯作者：
REIMER, PJ