Timescales for detecting a significant acceleration in sea level rise.

Timescales for detecting a significant acceleration in sea level rise.
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DOI:
10.1038/ncomms4635
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发表时间:
2014-04-14
影响因子:
16.6
通讯作者:
Dangendorf, Soenke
Dangendorf, Soenke
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Haigh, Ivan D.;Wahl, Thomas;Rohling, Eelco J.;Price, Rene M.;Pattiaratchi, Charitha B.;Calafat, Francisco M.;Dangendorf, Soenke

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有观测证据表明,全球海平面正在上升,人们担心上升速度会加快,严重威胁沿海社区。然而,关于海平面上升的速度目前是否在增加,如果是,增加了多少,仍然存在相当大的争论。在这里,我们提供了新的见解海平面加速度应用的主要方法,已被用于搜索历史数据中的加速度,以确定的时间(不确定性),在该加速度可能首先被识别在统计上显着的方式(如果不是明显的)在海平面记录,我们已经人为地延长到2100年。我们发现,最重要的方法,尽早检测到一个显着的海平面加速在于提高认识(和随后的删除)海平面记录的年际到数十年的变化。 由于气候变化,全球海平面正在上升,但以何种速度上升,以及这一速度是否正在上升,仍有待讨论。黑格等人的研究表明,只有在消除年际和年代际变化的情况下,才能最早地检测到海平面上升速率的显著增加。
There is observational evidence that global sea level is rising and there is concern that the rate of rise will increase, significantly threatening coastal communities. However, considerable debate remains as to whether the rate of sea level rise is currently increasing and, if so, by how much. Here we provide new insights into sea level accelerations by applying the main methods that have been used previously to search for accelerations in historical data, to identify the timings (with uncertainties) at which accelerations might first be recognized in a statistically significant manner (if not apparent already) in sea level records that we have artificially extended to 2100. We find that the most important approach to earliest possible detection of a significant sea level acceleration lies in improved understanding (and subsequent removal) of interannual to multidecadal variability in sea level records. Global sea levels are rising as a result of climate change, but at what rate, and whether this rate is increasing is open to debate. Haigh et al. show that the earliest detection of significant increase in the rate of sea level rise can only be achieved once interannual and multidecadal variability is removed.
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