Acceleration in the Global Mean Sea Level Rise: 2005–2015
Acceleration in the Global Mean Sea Level Rise: 2005–2015
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DOI：
10.1002/2017gl076129
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发表时间：
2017-12
影响因子：
5.2
通讯作者：
S. Yi;K. Heki;An Qian
中科院分区：
文献类型：
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作者：
S. Yi;K. Heki;An Qian
100多年来，全球平均海平面一直在加速上升，而在过去20年里，这种加速似乎还在进一步加剧。大地测量和海洋观测的最新发展使我们能够仔细检查和了解过去十年海平面加速的来源。为此，结合了2005年至2015年期间卫星测高、重力和海洋现场测量的观测结果，并审查了它们的闭合性。结果表明，近10年的加速度（0.27±0.17 mm/yr2）是1993-2014年的3倍左右。其中陆冰融化加速0.04±0.01 mm/yr2(~15%)，海水热膨胀加速0.12±0.06 mm/yr2(~44%)，陆地蓄水减少加速0.11±0.02 mm/yr2（~41%）。尽管这些值在11年内可能会受到自然变化的影响，但它们揭示了海平面加速的潜在机制，并反映了其对全球变暖的敏感性。
Global mean sea level rise has been accelerating for more than 100 years, and the acceleration in the last two decades seems to further increase. The latest development in geodetic and marine observations enables us to scrutinize and understand the sources of the sea level acceleration in the last decade. For this end, observations from satellite altimetry, gravimetry, and in situ measurements of the ocean between 2005 and 2015 are combined, and their closure is examined. Our results show that the acceleration during the last decade (0.27 ± 0.17 mm/yr2) is about 3 times faster than its value during 1993–2014. The acceleration comes from three factors, that is, 0.04 ± 0.01 mm/yr2 (~15%) by land ice melting, 0.12 ± 0.06 mm/yr2 (~44%) by thermal expansion of the seawater, and 0.11 ± 0.02 mm/yr2 (~41%) by declining land water storage. Although these values in 11 years may suffer from natural variabilities, they shed light on the underlying mechanisms of sea level acceleration and reflect its susceptibility to the global warming.