Tree-Ring Investigation of Holocene Flood-Deposited Wood From the Oneida Lake Watershed, New York State
Tree-Ring Investigation of Holocene Flood-Deposited Wood From the Oneida Lake Watershed, New York State
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DOI：
10.3959/1536-1098-71.2.83
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
I. Panyushkina;S. Leavitt;E. Domack;A. Wiedenhoeft
中科院分区：
文献类型：
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作者：
I. Panyushkina;S. Leavitt;E. Domack;A. Wiedenhoeft
摘要在纽约州中部地区，冰川沉积和河流/湖泊沉积相互作用，保存了地质和水文事件以及水文气候转变的历史。纽约州奥奈达湖东部分水岭的鱼溪下游是一个有着突出木材遗迹的地区。本研究探讨了收集的52个日志包裹在富含有机物的存款暴露的银行侵蚀在三个地点沿着鱼溪附近的西尔万海滩，纽约州，相对于放射性碳年龄，物种和交叉定年潜力的树木年轮。放射性碳年龄和成功的树轮交叉定年文件，我们解释为七个主要的水文事件约。10 ka（即约10，000 cal yr BP）、7.4 ka、6.8 ka、6.4 ka、5.5 ka、3.1 ka和2.2 ka cal BP，在此期间，河道淤积和树木埋藏可能与洪水频率突然增加和/或高水位有关。这项初步研究建立了四个浮动树轮记录：[1]早全新世铁杉（铁杉），中全新世[2]核桃（核桃属）。[3]西卡莫尔（悬铃木属）;[4]晚全新世榆树（榆属）;样本量为8-14个55-135年的系列。尽管在每个站点的放射性碳年龄分布的复杂性，保存完好的木材的财富证明了通过记录洪水的规模，位置和时间来了解奥奈达流域的古森林历史的巨大希望。进一步的系统采样可以增加和加强树木年轮测年和基于树木年轮的洪水记录，确认结果，并有助于该地区的全新世水文历史。
ABSTRACT Glacial deposition and fluvial/lacustrine sedimentation interact over terrains in central New York State to preserve a history of geological and hydrological events as well as hydroclimatic transitions. The lower reach of Fish Creek draining the eastern watershed of Oneida Lake, NY, is an area with prominent wood remains. This study explores a collection of 52 logs encased in organic-rich deposits exposed by bank erosion at three locations along Fish Creek near Sylvan Beach, NY, with respect to radiocarbon ages, species, and the crossdating potential of tree rings. Radiocarbon ages and successful tree-ring crossdating document what we interpret as seven major hydrologic episodes ca. 10 ka (i.e. ca. 10,000 cal yr BP), 7.4 ka, 6.8 ka, 6.4 ka, 5.5 ka, 3.1 ka and 2.2 ka cal BP, during which channel aggradation and tree burial may have been associated with abruptly increased flood frequency and/or high water tables. This pilot study establishes four floating tree-ring records: [1] early Holocene hemlock (Tsuga), mid-Holocene [2] walnut (Juglans sp.) and [3] sycamore (Platanus), and [4] late Holocene elm (Ulmus sp.), with sample sizes of 8–14 series of 55–135 years length. Despite the complexity of distribution of radiocarbon ages at each site, the wealth of well-preserved wood demonstrates great promise for understanding the paleoflood history of the Oneida watershed by documenting the magnitude, location, and timing of floods. Further additional systematic sampling can add and strengthen tree-ring dating and tree-ring based flood records, confirm results, and contribute to the Holocene hydrological history of the region.