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Mechanism study of the 2010–2016 rapid rise of the Caribbean Sea Level
Global and Planetary Change ( IF 3.9 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.gloplacha.2020.103219
Hamed D. Ibrahim , Yunfang Sun

Abstract The Caribbean Sea level increased rapidly by about 6.55 cm in the period 2010–2016. This dramatic rise occurred concurrently with a step change in basin mass (freshwater equivalent) of about 1.09 cm (relative to 2006–2009) and an increase in surface freshwater loss of about 5.96 cm. Using re-analysis and satellite-derived atmosphere and ocean physics datasets, we investigate the driver for this episode of sea level rise and its impact on vertical water structure. Our conclusion is that increase in Caribbean sea evaporation, which removes latent heat and cools surface waters, caused upward longwave radiation to decrease, resulting in warming and total steric sea level rise of about 5.34 cm; and saline water that compensated for increased surface freshwater loss caused basin mass to increase due to the additional salt. Because of these concurrent changes, surface layer and mixed layer salinity and temperature increased; and adjustments of the Atlantic inflow and Gulf of Mexico return flow (equivalent net lateral exchange increase of about 7.05 cm) deepened the interface between the stratified top water and bottom rest water of the Caribbean Sea. This study highlights the useful role of the Caribbean Sea for illustrating local mechanisms and patterns of sea level variability in a changing global climate.

中文翻译:

2010-2016年加勒比海平面快速上升机制研究

摘要 加勒比海平面在 2010-2016 年期间迅速上升了约 6.55 厘米。这种急剧上升与盆地质量(淡水当量)的阶跃变化约 1.09 厘米(相对于 2006-2009 年)和地表淡水损失增加约 5.96 厘米同时发生。使用重新分析和卫星衍生的大气和海洋物理数据集,我们调查了这次海平面上升的驱动因素及其对垂直水结构的影响。我们的结论是,加勒比海蒸发量增加,去除潜热并冷却地表水,导致向上的长波辐射减少,导致变暖和总空间海平面上升约 5.34 厘米;补偿增加的地表淡水损失的咸水由于额外的盐分而导致盆地质量增加。由于这些同时发生的变化,表层和混合层盐度和温度升高;大西洋流入和墨西哥湾回流的调整(等效净横向交换增加约 7.05 cm)加深了加勒比海分层顶部水和底部休息水之间的界面。这项研究强调了加勒比海在说明全球气候变化中海平面变化的局部机制和模式方面的有用作用。
更新日期:2020-08-01
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