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首页> 外文期刊>Journal of Ocean University of China >Reconsidering Melt-water Pulses 1A and 1B: Global Impacts of Rapid Sea-level Rise
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Reconsidering Melt-water Pulses 1A and 1B: Global Impacts of Rapid Sea-level Rise

机译：重新考虑融水脉冲1 a和1 b:全球快速海平面上升的影响

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摘要

Re-evaluation of the post-glacial sea level derived from the Barbados coral-reef borings suggests slightly revised depth ranges and timing of melt-water pulses MWP-1A (96-76m, 14.3-14.0 ka cal BP) and 1B (58-45m, 11.5-11.2 ka cal BP), respectively. Ages of non-reef sea-level indicators from the Sunda Shelf, the East China Sea and Yellow Sea for these two intervals are unreliable because of the well-documented radiocarbon (~(14)C) plateau, but their vertical clustering corresponds closely with MWP-1A and 1B depth ranges. Close correlation of the revised sea-level curve with Greenland ice-core data suggests that the ~(14)C plateau may be related to oceanographic-atmospheric changes due to rapid sea-level rise, fresh-water input, and impaired ocean circulation. MWP-1A appears to have occurred at the end of Bo11ing Warm Transition, suggesting that the rapid sea-level rise may have resulted from lateral heat transport from low to high-latitude regions and subsequent abrupt ice-sheet collapses in both North America-Europe and Antarctica. An around 70 mm a~(-1) transgression during MWP-1A may have increased freshwater discharge to the North Atlantic by as much as an order of magnitude, thereby disturbing thermohaline circulation and initiating the Older Dryas global cooling.
机译：重新评估的幅度大来自巴巴多斯岛的珊瑚礁钻孔建议稍微修正深度范围和时机厚脉冲MWP-1A (96 - 76 m, 14.3 - -14.0 ka卡尔BP)和1 b (58-45m, 11.5 - -11.2 ka卡尔BP),分别。从巽他陆架指标,中国东部这两个间隔的海域和黄海不可靠的,因为证据确凿的放射性碳(~ (14)C)高原,但是他们的垂直聚类对应与MWP-1A和1 b深度范围。海平面与格陵兰专门数据曲线表明,~ (14)C高原可能是相关的由于快速oceanographic-atmospheric变化海平面上升、淡水输入和受损海洋环流。发生在年底bo1温暖的过渡,这表明快速海平面上升可能从低到引起横向热传输高纬度地区和随后的突然在北America-Europe的冰盖崩溃和南极洲。罪过MWP-1A期间可能会增加淡水排放的北大西洋就像一个数量级,从而令人不安温盐环流和开始老了新全球变冷。

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