论文标题
相对海平面和突然卸载
Relative Sea Level and Abrupt Mass Unloading
论文作者
论文摘要
相对海平面记录气候变化以及垂直土地运动。在巴巴多斯，必须进行隆升变化来解释最完整的珊瑚礁记录之一。在这里，我们表明，使用建模方法突然卸载30 km3的突然质量卸载约为0.45 mm/yr。已经对不同的体积和弹性厚度进行了模拟。与突然卸载相关的等静力调整解释了观察到的隆升速率从0.34 mm/yr增加到发生的11.2 kyr以前发生的。重建的海平面曲线突出显示了4.8 m的海平面跳跃，延迟了150年的延迟，与年轻的Dryas Cold事件的终止和300年的终止，然后突然卸载。这种海平面的跳跃对应于融合水脉冲MWP-1B，不是人工制品。 500年的停滞从12到11.5 kyr bp。相对海平面记录可用于检测过去的滑坡和侵蚀。在过去的一千年中，由于气候变暖导致的海平面突然上升，对海平面的准确分析和重建。
Relative sea level records climatic change as well as vertical land movement. In Barbados, uplift variation is necessary to interpret one of the most complete coral reef records. Here we show that an abrupt mass unloading of 30 km3 caused an uplift variation of ~0.45 mm/yr using a modelling approach. Simulations have been conducted for different volumes and elastic thicknesses. Isostatic adjustment in relation with an abrupt mass unloading explains the observed uplift rate increased from 0.34 mm/yr to 0.8 mm/yr that occurred 11.2 kyr ago. The reconstructed sea-level curve highlights a sea-level jump of 4.8 m, with a delay of 150 yr from the termination of Younger Dryas cold event and 300 yr before the abrupt mass unloading. This sea-level jump corresponds to meltwater pulse MWP-1B and is not an artefact. A stagnation of 500 yr occurred from 12 to 11.5 kyr BP. Relative sea level records are useful to detect past landslides and erosion. Accurate analysis and reconstruction of sea-level permits to determine sea-level abrupt rise caused by climate warming during the last thousand years.
