气候变化领域集成服务门户(CCPortal): Peat humification records from Restionaceae bogs in northern New Zealand as potential indicators of Holocene precipitation; seasonality; and ENSO

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DOI	10.1016/j.quascirev.2019.06.036
	Peat humification records from Restionaceae bogs in northern New Zealand as potential indicators of Holocene precipitation; seasonality; and ENSO
	Newnham R.M.; Hazell Z.J.; Charman D.J.; Lowe D.J.; Rees A.B.H.; Amesbury M.J.; Roland T.P.; Gehrels M.; van den Bos V.; Jara I.A.
发表日期	2019
ISSN	0277-3791
起始页码	378
结束页码	394
卷号	218
英文摘要	In comparison with temperature reconstructions, New Zealand proxy records for paleo-precipitation are rare, despite the importance of precipitation in contemporary climate variability and for projected climate impacts. In this study, records of mid-late Holocene palaeomoisture variation were derived for two hydrologically separate ombrotrophic Restionaceae bogs in northern New Zealand, based on peat humification analysis. At each site, three cores were analysed for peat humification, facilitating both intra- and inter-site comparisons. Age models for the six sequences were developed using radiocarbon dating and tephrochronology. Twelve tephras (including six cryptotephras) were recognised, four of which were used to precisely link the two sites and to define start and end points for the records at 7027 ± 170 (Tuhua tephra) and 1718 ± 10 cal yr BP (Taupo tephra) (2σ-age ranges), respectively. We find individual differences between the six peat humification records at short-term timescales that are presumably due to local site factors, in particular changing vegetation and microtopography, or to changes in the composition of the material analysed. Stronger longer-term coherence is observed between all six records but is attributed to slow anaerobic decay over time because the implied trend towards wetter summers in the late Holocene cannot be corroborated by independent climate proxies. Despite these confounding factors, centennial scale shifts in bog surface wetness are a pervasive feature of all six records with varying degrees of overlap in time that show strong correspondence with El Niño-Southern Oscillation reconstructions from the eastern equatorial Pacific. These results indicate the potential for peat humification records from New Zealand's ombrotrophic bogs to elucidate past climate variability and also demonstrate the importance of developing multiple well-dated profiles from more than one site. © 2019
英文关键词	Bayesian age modelling; Effective precipitation; ENSO; Peat humification; Tephrochronology
语种	英语
scopus关键词	Atmospheric pressure; Biodegradation; Peat; Repair; Wetlands; Age modelling; Eastern equatorial Pacific; ENSO; Humification; Individual Differences; Southern oscillation; Temperature reconstruction; Tephrochronology; Climatology; Bayesian analysis; bog; El Nino-Southern Oscillation; environmental indicator; historical record; Holocene; humification; paleoclimate; peat; precipitation (climatology); radiocarbon dating; seasonality; tephrochronology; New Zealand; Restionaceae
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151840
作者单位	School of Geography, Environment & Earth Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand; Historic England, Fort Cumberland, Fort Cumberland Road, Eastney, Portsmouth, Hampshire, PO4 9LD, United Kingdom; Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; School of Science, University of Waikato, Private Bag 3105, Hamilton, 3240, New Zealand; Environmental Change Research Unit (ECRU), Faculty of Biological and Environmental Sciences, University of Helsinki, Finland; Environment Department, York University, United Kingdom; Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Colina del Pino, La Serena, Chile
推荐引用方式 GB/T 7714	Newnham R.M.,Hazell Z.J.,Charman D.J.,et al. Peat humification records from Restionaceae bogs in northern New Zealand as potential indicators of Holocene precipitation; seasonality; and ENSO[J],2019,218.
APA	Newnham R.M..,Hazell Z.J..,Charman D.J..,Lowe D.J..,Rees A.B.H..,...&Jara I.A..(2019).Peat humification records from Restionaceae bogs in northern New Zealand as potential indicators of Holocene precipitation; seasonality; and ENSO.Quaternary Science Reviews,218.
MLA	Newnham R.M.,et al."Peat humification records from Restionaceae bogs in northern New Zealand as potential indicators of Holocene precipitation; seasonality; and ENSO".Quaternary Science Reviews 218(2019).