Gifford H Miller

Dados Biográficos

ID4063512
NOMEGifford H Miller
PRENOMESGifford H
SOBRENOMEMiller
ASSINATURAMILLER G H
AFILIAÇÕESInstitute of Arctic and Alpine Research
ORCID0000-0002-8225-2740
VERIFICADOSim
TOTAL DE OBRAS32
TOTAL DE CITAÇÕES64
TOTAL COMO AUTOR32
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO1972
ANO MAIS RECENTE DE PUBLICAÇÃO2014
ÍNDICE H5

  • Subglacially precipitated carbonates record geochemical interactions and pollen preservation at the base of the Laurentide Ice Sheet on central Baffin Island, eastern Canadian Arctic

    Open AccessKurt A Refsnider, Gifford H Miller et al.ARTICLEQuaternary Research2014

    The mineralogy and isotopic compositions of subglacially precipitated carbonate crusts (SPCCs) provide information on conditions and processes beneath former glaciers and ice sheets. Here we describe SPCCs formed on gneissic bedrock at the bed of the Laurentide Ice Sheet (LIS) during the last glacial maximum on central Baffin Island. Geochemical data indicate that the Ca in the crusts was likely derived from the subglacial chemical weathering Ca-…

  • Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea‐ice/ocean feedbacks

    Open AccessGifford H Miller, Áslaug Geirsdóttir et al.ARTICLEGeophysical Research Letters2012

    Northern Hemisphere summer temperatures over the past 8000 years have been paced by the slow decrease in summer insolation resulting from the precession of the equinoxes. However, the causes of superposed century‐scale cold summer anomalies, of which the Little Ice Age (LIA) is the most extreme, remain debated, largely because the natural forcings are either weak or, in the case of volcanism, short lived. Here we present precisely dated records o…

  • A 2000-yr-long multi-proxy lacustrine record from eastern Baffin Island, Arctic Canada reveals first millennium AD cold period

    Open AccessElizabeth K Thomas, Jason P Briner et al.ARTICLEQuaternary Research2011

    We generate a multi-proxy sub-centennial-scale reconstruction of environmental change during the past two millennia from Itilliq Lake, Baffin Island, Arctic Canada. Our reconstruction arises from a finely subsectioned 210 Pb- and 14 C-dated surface sediment core and includes measures of organic matter (e.g., chlorophyll a ; carbon–nitrogen ratio) and insect (Diptera: Chironomidae) assemblages. Within the past millennium, the least productive, and…

  • Paleoecological evidence for abrupt cold reversals during peak Holocene warmth on Baffin Island, Arctic Canada

    Open AccessYarrow Axford, Jason P Briner et al.ARTICLEQuaternary Research2009

    A continuous record of insect (Chironomidae) remains preserved in lake sediments is used to infer temperature changes at a small lake in Arctic Canada through the Holocene. Early Holocene summers at the study site were characterized by more thermophilous assemblages and warmer inferred temperatures than today, presumably in response to the positive anomaly in Northern Hemisphere summer insolation. Peak early Holocene warmth was interrupted by two…

  • Recent Warming Reverses Long-Term Arctic Cooling

    Open AccessDarrell S Kaufman, David P Schneider et al.ARTICLEScience2009

    Climate Reversal The climate and environment of the Arctic have changed drastically over the short course of modern observation. Kaufman et al. (p. 1236 ) synthesized 2000 years of proxy data from lakes above 60° N latitude with complementary ice core and tree ring records, to create a paleoclimate reconstruction for the Arctic with a 10-year resolution. A gradual cooling trend at the start of the record had reversed by the beginning of the 20th …

  • A multi-proxy lacustrine record of Holocene climate change on northeastern Baffin Island, Arctic Canada

    Open AccessJason P Briner, Neal Michelutti et al.ARTICLEQuaternary Research2006

    Reconstructions of past environmental changes are critical for understanding the natural variability of Earth's climate system and for providing a context for present and future global change. Radiocarbon-dated lake sediments from Lake CF3, northeastern Baffin Island, Arctic Canada, are used to reconstruct past environmental conditions over the last 11,200 years. Numerous proxies, including chironomid-inferred July air temperatures, diatom-inferr…

  • Preservation of Arctic landscapes overridden by cold-based ice sheets

    Open AccessP Thompson Davis, Jason P Briner et al.ARTICLEQuaternary Research2006

    For nearly 40 years, a massive, well-preserved glaciomarine delta more than 54,000 years old and ancillary landforms have formed the cornerstone of models positing limited ice-sheet extent in Arctic Canada during the late Wisconsinan. We present exposure ages for large boulders on the delta surface, which coupled with preservation of relict landforms demonstrate that the region was covered by minimally erosive, cold-based ice during the late Wisc…

  • The geochronological potential of isoleucine epimerisation in cassowary and megapode eggshells from archaeological sites

    Open AccessSimon J Clarke, Gifford H Miller et al.ARTICLEJournal of Archaeological Science2006Citada por: 1Referências: 11

  • Aeolian sand depositional records from western Nebraska

    Open AccessSteven L Forman, Liliana Marìn et al.ARTICLEThe Holocene2005Citada por: 5Referências: 10

    The Great Plains is dominated by presently stabilized dune fields that are indicators of extreme drought in the late Holocene. This study focused on deciphering the timing of reactivation of dunes in western Nebraska. Stratigraphy adjacent to dune-dammed lakes reveals aeolian sand separated by palaeosols, indicating mobilization of aeolian sand followed by landscape stability. The chronology of aeolian-sand depositional events is constrained usin…

  • Carbon isotope evidence for an abrupt reduction in grasses coincident with European settlement of Lake Eyre, South Australia

    Open AccessBeverly J Johnson, Gifford H Miller et al.ARTICLEThe Holocene2005Citada por: 2Referências: 3

    Stable carbon isotopes in emu eggshell (EES) reflect emu diets and consequently the vegetation available for food sources. At Lake Eyre, South Australia, isotopic data suggest that there has been a rapid and dramatic change in vegetation at some point over the last 200 years when compared with the rest of the Holocene. The proportion of C 4 plants in emu diets has been reduced by approximately 20% in response to an overall shift in C 4 /C3 biomas…

  • Holocene Environmental Variability in Southern Greenland Inferred from Lake Sediments

    Open AccessMichael R Kaplan, Alexander P Wolfe et al.ARTICLEQuaternary Research2002

    Sediments from Qipisarqo Lake provide a continuous Holocene paleoenvironmental record from southern Greenland. Following deglaciation and glacio-isostatic emergence of the basin from the sea ∼9100 cal yr B.P., proxies of lake paleoproductivity, including biogenic silica and organic matter, increased markedly until 6000 cal yr B.P. and thereafter remained stable over the ensuing warm three millennia. Subsequent decreases in these proxies, most dra…

  • Late Pleistocene human occupation of inland rainforest, Bird's Head, Papua

    Open AccessJuliette M Pasveer, Simon J Clarke et al.ARTICLEArchaeology in Oceania/Archæology…2002Citada por: 8Referências: 5

    This paper reports new AMS dates for Late Pleistocene occupation of the Ayamaru Plateau in the central Bird's Head of Papua. Two cave sites, Kria Cave and Toé Cave, together provide occupation sequences that span the Holocene and extend back to the Last Glacial Maximum. The associated faunal remains suggest that this lowland area has supported continuous rainforest cover throughout the entire period of occupation. During the Last Glacial Maximum …

  • Early Human Occupation at Devil's Lair, Southwestern Australia 50,000 Years Ago

    Open AccessChris Turney, Chris S M Turney et al.ARTICLEQuaternary Research2001

    New dating confirms that people occupied the Australian continent before the earliest time inferred from conventional radiocarbon analysis. Many of the new ages were obtained by accelerator mass spectrometry 14 C dating after an acid–base–acid pretreatment with bulk combustion (ABA-BC) or after a newly developed acid–base–wet oxidation pretreatment with stepped combustion (ABOX-SC). The samples (charcoal) came from the earliest occupation levels …

  • Initiation of the Australian summer monsoon 14,000 years ago

    Open AccessKarl-Heinz Wyrwoll, Gifford H MillerARTICLEQuaternary International2001

  • Holocene cirque glacier activity in western Spitsbergen, Svalbard

    Open AccessJ A Snyder, A Werner et al.ARTICLEThe Holocene2000Citada por: 6Referências: 6

    Holocene glacial variations of a presently ice-free cirque in western Spitsbergen are inferred from sediment records from the proglacial lake Linnévatnet. Glaciation is indicated in the core records by increased intensity of laminae derived from the cirque inflow and by increase in sediment accumulation rate. Radiocarbon ages on terrestrial plant macrofossils limit the onset of glaciation in the cirque to within the last six centuries. No evidenc…

  • Earliest modern humans in southern Africa dated by isoleucine epimerization in ostrich eggshell

    Open AccessGifford H Miller, Peter Beaumont et al.ARTICLEQuaternary Science Reviews1999

  • Archaeological Applications of Amino Acid Racemization

    Open AccessBonnie Johnson, B J JOHNSON et al.ARTICLEArchaeometry1997Citada por: 4Referências: 100

    Amino acid racemization (AAR) in fossil biominerals has been used over the last 30 years to develop reliable chronologies and thermal histories in archaeological settings from all over the world. It is a biochemical reaction which progresses with time and temperature, and has the potential to be used in any material capable of sequestering amino acids (e.g., avian eggshell, molluscs, teeth, and bones). AAR is not a numerical dating method, per se…

  • Enhanced Age Resolution of the Marine Quaternary Record in the Arctic Using Aspartic Acid Racemization Dating of Bivalve Shells

    Open AccessGlenn A Goodfriend, Julie Brigham-Grette et al.ARTICLEQuaternary Research1996

    Aspartic acid (Asp) racemization occurs at a significantly higher rate than isoleucine epimerization and consequently provides better temporal resolution of Arctic marine deposits (from Alaska, Spitsbergen, and Baffin Island). Heating experiments (at 100°C) on the bivalves Mya and Hiatella show the Asp racemization rate decreases with increasing D/L values, as is typical for biogenic carbonates. Based on these experimental racemization rates and …

  • AMS-radiocarbon dating of organic-poor lake sediment, an example from Linnévatnet, Spitsbergen, Svalbard

    Open AccessJ A Snyder, Gifford H Miller et al.ARTICLEThe Holocene1994Citada por: 5Referências: 4

    AMS-radiocarbon dating of specific organic fractions is used to evaluate sources of errors in dating of organic-poor lake sediment from Linnévatnet, a proglacial arctic lake. Dates on un differentiated (bulk) organic matter are much too old because of contamination from detrital coal. Attempts to remove coal from other organic matter were only partially successful, a consequence of the wide grain-size distribution of the coal. Even if coal contam…

  • Chronology of Hominid Occupation at Bir Tarfawi and Bir Sahara East, Based on the Epimerization of Isoleucine in Ostrich Eggshells

    Gifford H MillerCHAPTEREgypt During the Last Interglacial1993

  • Pleistocene Geochronology and Palaeothermometry from Protein Diagenesis in Ostrich Eggshells

    Gifford H Miller, Peter Beaumont et al.CHAPTEROrigin of Modern Humans and the…1993

    Pleistocene Geochronology and Palaeothermometry from Protein Diagenesis in Ostrich Eggshells: Implications for the Evolution of Modern Humans was published in The Origin of Modern Humans and the Impact of Chronometric Dating on page 49

  • The Implications of Amino Acid Racemization Dates of Levantine Mousterian Deposits in Southern Jordan

    Don O Henry, Don Henry et al.ARTICLEPaléorient1992Citada por: 33

    La datation des coquilles d'œufs d'autruche par l'analyse de la racémisation des amino-acides (AAR) fournit une possibilité nouvelle, importante de déterminer l'ancienneté des dépôts pléistocènes. Les dates de coquilles d'œufs prélevées sur deux sites du Paléolithique moyen dans le sud de la Jordanie, obtenues par cette méthode, ont donné un âge d'environ 69 К pour les deux sites. Or, ceci concorde avec les estimations fournies par l'étude du mat…

  • Paleoenvironments of the last interglacial in northwest north atlantic region and adjacent mainland Canada

    Open AccessAnne De Vernal, Gifford H Miller et al.ARTICLEQuaternary International1991

  • Late quaternary land-sea interactions

    Open AccessEiliv Larsen, Hans P Sejrup et al.ARTICLEQuaternary International1991

  • Amino acid geochronology

    Open AccessGifford H Miller, Julie Brigham-GretteARTICLEQuaternary International1989