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首页> 外文期刊>Climatic Change >Climate scenarios of sea level rise for the northeast Atlantic Ocean: a study including the effects of ocean dynamics and gravity changes induced by ice melt
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Climate scenarios of sea level rise for the northeast Atlantic Ocean: a study including the effects of ocean dynamics and gravity changes induced by ice melt

机译:东北大西洋海平面上升的气候情景:一项研究,包括海洋动态和冰融化引起的重力变化的影响

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摘要

Here we present a set of regional climate scenarios of sea level rise for the northeast Atlantic Ocean. In this study, the latest observations and results obtained with state-of-the-art climate models are combined. In addition, regional effects due to ocean dynamics and changes in the Earth’s gravity field induced by melting of land-based ice masses have been taken into account. The climate scenarios are constructed for the target years 2050 and 2100, for both a moderate and a large rise in global mean atmospheric temperature (2 °C and 4 °C in 2100 respectively). The climate scenarios contain contributions from changes in ocean density (global thermal expansion and local steric changes related to changing ocean dynamics) and changes in ocean mass (melting of mountain glaciers and ice caps, changes in the Greenland and Antarctic ice sheets, and (minor) terrestrial water-storage contributions). All major components depend on the global temperature rise achieved in the target periods considered. The resulting set of climate scenarios represents our best estimate of twenty-first century sea level rise in the northeast Atlantic Ocean, given the current understanding of the various contributions. For 2100, they yield a local rise of 30 to 55 cm and 40 to 80 cm for the moderate and large rise in global mean atmospheric temperature, respectively.
机译:在这里,我们介绍了东北大西洋海平面上升的一系列区域气候情景。在这项研究中,结合了最新的观测结果和使用最新的气候模型获得的结果。此外,已经考虑到由于海洋动力学和陆地重力冰块融化引起的地球重力场变化而产生的区域影响。针对2050年和2100年的目标年份构建了气候情景,以实现全球平均大气温度适度和大幅增长(2100年分别为2°C和4°C)。气候情景包括海洋密度变化(全球热膨胀和与海洋动力学变化有关的局部空间变化)和海洋质量变化(山冰川和冰盖融化,格陵兰和南极冰盖变化以及(小)陆地蓄水量)。所有主要因素均取决于在所考虑的目标期内实现的全球温度上升。根据当前对各种贡献的了解,由此得出的一组气候情景代表了我们对二十一世纪东北大西洋海平面上升的最佳估计。对于2100年,全球平均大气温度分别适度和大幅上升,它们分别产生30至55 cm和40至80 cm的局部上升。

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