A pronounced dry event recorded around 4.2 ka in brine sediments from the northern Red Sea
A pronounced dry event recorded around 4.2 ka in brine sediments from the northern Red Sea
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DOI：
10.1016/j.yqres.2006.05.006
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发表时间：
2006-11-01
影响因子：
2.3
通讯作者：
Paetzold, Juergen
中科院分区：
文献类型：
--
作者：
Arz, Helge W.;Lamy, Frank;Paetzold, Juergen
部分层状沉积物取样于北方红海沙汉深盆地的盐水填充缺氧区。在约4200卡年BP超过两千年的缺氧沉积被取代的亚氧相强烈建议的盐水的情节缺乏。与此同时，来自表层有孔虫的稳定氧同位素显示出急剧增加（在不到100年的时间内），这表明在海面上存在强烈的正盐度异常。这一重大蒸发事件显著地促进了沙汉深小盆地深水的更新和随后的通气作用。重建的环境变化的时间和强度约4200 cal yr BP表明，这一事件是一个重大的干旱事件，这是广泛观察到在邻近地区，并强烈影响中东农业文明的区域表达。(c)2006年华盛顿大学。All rights reserved.
Partly laminated sediments were sampled from the brine-filled, anoxic Shahan Deep basin in the northern Red Sea. At about 4200 cal yr BP more than two millennia of anoxic sedimentation is replaced by a sub-oxic facies strongly suggesting the episodic absence of the brine. At the same time stable oxygen isotopes from surface dwelling foraminifera show a sharp increase (within less than 100 yr) pointing to a strong positive salinity anomaly at the sea surface. This major evaporation event significantly enhanced the renewal of deep water and the subsequent ventilation of the small Shahan Deep basin. The timing and strength of the reconstructed environmental changes around 4200 cal yr BP suggest that this event is the regional expression of a major drought event, which is widely observed in the neighboring regions, and which strongly affected Middle East agricultural civilizations. (c) 2006 University of Washington. All rights reserved.