A high-resolution climate record spanning the past 17 000 years recovered from Lake Ohau, South Island, New Zealand

IF 1.6 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Scientific Drilling Pub Date : 2018-10-22 DOI:10.5194/SD-24-41-2018

R. Levy, G. Dunbar, M. Vandergoes, Jamie D. Howarth, T. Kingan, A. Pyne, Grant Brotherston, M. Clarke, Bob Dagg, M. Hill, Evan Kenton, Steve Little, Darcy Mandeno, C. Moy, P. Muldoon, P. Doyle, Conrad Raines, P. Rutland, D. Strong, M. Terezow, L. Cochrane, R. Cossu, S. Fitzsimons, F. Florindo, Alexander L. Forrest, A. Gorman, Darrell S. Kaufman, Min Kyung Lee, Xun Li, P. Lurcock, N. McKay, F. Nelson, J. Purdie, H. Roop, S. Schladow, A. Sood, P. Upton, Sharon L. Walker, Gary S. Wilson

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引用次数: 4

Abstract

Abstract. A new annually resolved sedimentary record of Southern Hemisphere mid-latitude hydroclimate was recovered from Lake Ohau, South Island, New Zealand, in March 2016. The Lake Ohau Climate History (LOCH) project acquired cores from two sites (LOCH-1 and -2) that preserve sequences of laminated mud that accumulated since the lake formed ∼ 17 000 years ago. Cores were recovered using a purpose-built barge and drilling system designed to recover soft sediment from thick sedimentary sequences in lake systems up to 150 m deep. This system can be transported in two to three 40 ft long shipping containers and is suitable for use in a range of geographic locations. A comprehensive suite of data has been collected from the sedimentary sequence using state-of-the-art analytical equipment and techniques. These new observations of past environmental variability augment the historical instrumental record and are currently being integrated with regional climate and hydrological modelling studies to explore causes of variability in extreme/flood events over the past several millennia.

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从新西兰南岛奥豪湖恢复了过去17000年的高分辨率气候记录

摘要2016年3月，在新西兰南岛欧豪湖(Lake Ohau)恢复了一个新的南半球中纬度水文气候年分解沉积记录。奥豪湖气候历史(LOCH)项目从两个地点(LOCH-1和LOCH -2)获得了岩心，这些岩心保存了自17000年前湖泊形成以来积累的层压泥序列。岩心的回收使用了专门建造的驳船和钻井系统，该系统设计用于从150米深的湖泊系统的厚沉积序列中回收软沉积物。该系统可以在2到3个40英尺长的集装箱中运输，适用于各种地理位置。使用最先进的分析设备和技术，从沉积序列中收集了一套全面的数据。这些对过去环境变率的新观测增强了历史仪器记录，目前正与区域气候和水文模拟研究相结合，以探索过去几千年极端/洪水事件变率的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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