气候变化领域集成服务门户(CCPortal): Sea Level Rise in New Zealand: The Effect of Vertical Land Motion on Century-Long Tide Gauge Records in a Tectonically Active Region

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DOI	10.1029/2019JB018055
	Sea Level Rise in New Zealand: The Effect of Vertical Land Motion on Century-Long Tide Gauge Records in a Tectonically Active Region
	Denys P.H.; Beavan R.J.; Hannah J.; Pearson C.F.; Palmer N.; Denham M.; Hreinsdottir S.
发表日期	2020
ISSN	21699313
卷号	125 期号:1
英文摘要	Historically tide gauge (TG) data have been used to estimate global sea level rise. Critical to the analysis of TG records is the assumption that the TG sites are stable and not affected by vertical land motion (VLM). We analyze century-long TG records from New Zealand that have been affected by VLM due to both major and transient earthquake events at a regional level as well as local instabilities. Using combined GPS and precise leveling, we estimate relative VLM between the GPS and TG of up to 1 mm/year. Based on 15–20 years of GPS data, the effect of seismic activity and slow slip events has uplifted sites by up to 0.8 mm/year on average in Wellington and Dunedin. Updated estimates of long-term relative sea level (RSL) at four New Zealand TGs, as well as an estimate of RSL at a new fifth TG (New Plymouth), are determined using data through 2013—an additional 13 years compared to the previous study. The VLM corrected RSL rates gives our best estimate absolute sea level of +1.45 ± 0.28 mm/year (1891−2013). It is important that absolute sea level derived from RSL rates include realistic estimates of VLM, especially at TG sites that are close to plate boundaries, located in seismically active regions, affected by glacial isostatic adjustment, land ice loss, or gas/oil/water extraction. ©2020. The Authors.
英文关键词	climate change; sea level rise; tide gauge; transient deformation; vertical land motion
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/188035
作者单位	School of Surveying, University of Otago, Dunedin, New Zealand; GNS Science, Lower Hutt, New Zealand
推荐引用方式 GB/T 7714	Denys P.H.,Beavan R.J.,Hannah J.,et al. Sea Level Rise in New Zealand: The Effect of Vertical Land Motion on Century-Long Tide Gauge Records in a Tectonically Active Region[J],2020,125(1).
APA	Denys P.H..,Beavan R.J..,Hannah J..,Pearson C.F..,Palmer N..,...&Hreinsdottir S..(2020).Sea Level Rise in New Zealand: The Effect of Vertical Land Motion on Century-Long Tide Gauge Records in a Tectonically Active Region.Journal of Geophysical Research: Solid Earth,125(1).
MLA	Denys P.H.,et al."Sea Level Rise in New Zealand: The Effect of Vertical Land Motion on Century-Long Tide Gauge Records in a Tectonically Active Region".Journal of Geophysical Research: Solid Earth 125.1(2020).