Rewi M Newnham

Biographic Data

ID1044796
NAMERewi M Newnham
GIVEN NAMESRewi M
FAMILY NAMENewnham
SIGNATURENEWNHAM R M
AFFILIATIONSUniversity of Plymouth
VERIFIEDNo
TOTAL WORKS10
TOTAL CITATIONS18
AUTHOR COUNT10
EDITOR COUNT0
FIRST PUBLICATION YEAR1993
LATEST PUBLICATION YEAR2017
H-INDEX3

  • Pollen-based temperature and precipitation records of the past 14,600 years in northern New Zealand (37°S) and their linkages with the Southern Hemisphere atmospheric circulation

    Open AccessIgnacio Jara, Ignacio A Jara et al.ARTICLEThe Holocene2017References: 10

    Regional vegetation, climate history, and local water table fluctuations for the past 14,600 years are reconstructed from pollen and charcoal records of an ombrogenous peatbog in northern New Zealand (38°S). A long-term warming trend between 14,600 and 10,000 cal. yr BP is punctuated by two brief plateaux between 14,200–13,800 and 13,500–12,000 cal. yr BP. Periods of relatively drier conditions are inferred between 14,000–13,400 and 12,000–10,000…

  • The vegetation cover of New Zealand during the Last Glacial Maximum

    Open AccessRewi M NewnhamARTICLEQuaternary International2012

  • Towards rapid assay of cryptotephra in peat cores

    Open AccessMaria J Gehrels, Rewi M Newnham et al.ARTICLEQuaternary International2008

  • Timing of the late-glacial climate reversal in the Southern Hemisphere using high-resolution radiocarbon chronology for Kaipo Bog, New Zealand

    Open AccessI Hajdas, David J Lowe et al.ARTICLEQuaternary Research2006

    The pattern of climate change in the Southern Hemisphere during the Younger Dryas (YD) chronozone provides essential constraint on mechanisms of abrupt climate change only if accurate, high-precision chronologies are obtained. A climate reversal reported previously at Kaipo bog, New Zealand, had been dated between 13,600 and 12,600 cal yr B.P. and appeared to asynchronously overlap the YD chron, but the chronology, based on conventionally radioca…

  • A continuous 5300-yr Holocene cryptotephrostratigraphic record from northern New Zealand and implications for tephrochronology and volcanic hazard assessment

    Open AccessMaria Gehrels, Maria J Gehrels et al.ARTICLEThe Holocene2006Cited by: 5References: 13

    A continuous ∼5280 calendar (cal.) yr long cryptotephrostratigraphic record of a peat core from northern New Zealand demonstrates that cryptotephra studies can enhance conventional tephra records by extending the known distribution of ash fall and enabling re-assessment of volcanic hazards. A systematic sampling strategy was used to locate peaks in glass-shard concentrations and to determine loci of individual geochemical populations, and a palyn…

  • A wiggle-match date for Polynesian settlement of New Zealand

    Open AccessAlan G Hogg, Angela Hogg et al.ARTICLEAntiquity2003

    Dating initial colonisation and environmental impacts by Polynesians in New Zealand is controversial. A key horizon is provided by the Kaharoa Tephra, deposited from an eruption of Mt Tarawera, because just underneath this layer are the first signs of forest clearance which imply human settlement. The authors used a log of celery pine from within Kaharoa deposits to derive a new precise date for the eruption via “wiggle-matching” – matching the r…

  • Rapid sea-level rise in the Gulf of Maine, USA, since AD 1800

    Open AccessW Roland Gehrels, Daniel F Belknap et al.ARTICLEThe Holocene2002Cited by: 6References: 1

    Two sea-level records from salt marshes in coastal Maine are derived from foraminiferal analyses and AMS 14 C, 210 Pb, 137 Cs and pollen chronology. Both records cover the period from AD 800 until the present and show corresponding patterns of sea-level change when corrected for trends which could accommodate millennial-scale isostatic adjustments. The records provide a detailed sea-level chronology for the last few centuries and thus link the in…

  • A late-Holocene and prehistoric record of environmental change from Lake Waikaremoana, New Zealand

    Open AccessRewi M Newnham, Rewi Newnham et al.ARTICLEThe Holocene1998Cited by: 6References: 5

    Further evidence in support of a late pre-European (Polynesian) settlement of New Zealand is pro vided by an 1850-year-long tephropalynological record from a remote region in New Zealand's North Island. The earliest unequivocally anthropogenic forest clearance is estimated from sedimentation rates to have occurred c. 375 14 C years BP (c. ad 1523–1631), although the radiocarbon chronology, shown by tephrochron ology to be erroneous due to hard-wa…

  • Lecture reviews by students in groups

    Rewi M Newnham, Rewi NewnhamARTICLEJournal of Geography in Higher…1997Cited by: 1References: 1

    The benefits of conventionally reviewing or recapping lectures can be enhanced by allowing time in class for students to review lectures in small groups. Building this procedure into a lecture programme helps promote discussion, interaction and group activity, and provides opportunities for in‐course monitoring of both lecturer and student performance. Other benefits include a student‐authored course review document. Evaluation of this practice i…

  • Climatic Implications of Macro- and Microfossil Assemblages from Late Pleistocene Deposits in Northern New Zealand

    Open AccessJohn C Ogden, John Ogden et al.ARTICLEQuaternary Research1993

    Twenty-two plant species were identified from leaves, fruits, or flowers, and 41 taxa from pollen, present in a macrofossil (leaf) layer in a peat swamp formed on Pleistocene dunes on the Aupouri Peninsula in northern New Zealand. Eight genera of gymnosperms are represented. With the exception of Lagarostrobos colensoi, all tree species abundant as macrofossils are also common as pollen. Macrofossils enabled the on-site flora to be compared with …