John T Andrews

Biographic Data

ID3607103
NAMEJohn T Andrews
GIVEN NAMESJohn T
FAMILY NAMEAndrews
SIGNATUREANDREWS J T
AFFILIATIONSInstitute of Arctic and Alpine Research
ORCID0000-0003-3169-5979
VERIFIEDYes
TOTAL WORKS47
TOTAL CITATIONS59
AUTHOR COUNT47
EDITOR COUNT0
FIRST PUBLICATION YEAR1941
LATEST PUBLICATION YEAR2023
H-INDEX4

  • Labor, Class, Culture

    John Andrews, John T AndrewsARTICLESocial Text2023

    Research Article| June 01 2023 Labor, Class, Culture: Stanley Aronowitz and His Legacy (1933 – 2021) John Andrews John Andrews Edited by Search for other works by this author on: This Site Google Social Text (2023) 41 (2 (155)): 75. https://doi.org/10.1215/01642472-10383221 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Permissions Cit…

  • Holocene Mg/Ca, alkenones, and light stable isotope measurements on the outer North Iceland shelf (MD99-2269)

    Open AccessGréta B Kristjánsdóttir, Matthias Moros et al.ARTICLEThe Holocene2016References: 23

    To evaluate whether proxies that record surface, near-surface, and bottom water conditions from the North Iceland shelf have similar trends and periodicities, we examine Holocene century-scale paleoceanographic records from core MD99-2269. This core site lies close to the boundary between Atlantic and Arctic/Polar waters, and in an area frequently influenced by drift ice. The proxies are stable δ 13 C and δ 18 O values on planktonic and benthic f…

  • 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-…

  • A comparison between multiproxy and historical data ( ad 1990–1840) of drift ice conditions on the East Greenland Shelf (~66°N)

    Open AccessMontserrat Alonso‐García, Montserrat Alonso-García et al.ARTICLEThe Holocene2013Cited by: 1References: 7

    The reduction in sea ice along the SE Greenland coast during the last century has severely impacted ice-rafting to this area. In order to reconstruct ice-rafting and oceanographic conditions in the area of Denmark Strait during the last ~150 years, we conducted a multiproxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Trough (~300 m water depth). The proxy-based data obtained have been compared with historical and instru…

  • Cooling and freshening at 8.2 ka on the NW Iceland Shelf recorded in paired δ 18 O and Mg/Ca measurements of the benthic foraminifer Cibicides lobatulus

    Open AccessUrsula Quillmann, Thomas M Marchitto et al.ARTICLEQuaternary Research2012

    A shallow marine sediment core from NW Iceland provides evidence for a brief cooling and freshening at ~ 8200 cal yr BP, consistent with the hypothesis that the catastrophic outburst flood of the proglacial lakes Oijbway and Agassiz caused the 8.2 ka event. This is the first high-resolution record reconstructing near-surface temperatures and δ 18 O sw by paired measurements of Mg/Ca and δ 18 O calcite of a benthic foraminifer. We developed a new …

  • Formal definition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core, and selected auxiliary records

    Open AccessMike Walker, Sigfús Johnsen et al.ARTICLEJournal of Quaternary Science2009

    The Greenland ice core from NorthGRIP (NGRIP) contains a proxy climate record across the Pleistocene–Holocene boundary of unprecedented clarity and resolution. Analysis of an array of physical and chemical parameters within the ice enables the base of the Holocene, as reflected in the first signs of climatic warming at the end of the Younger Dryas/Greenland Stadial 1 cold phase, to be located with a high degree of precision. This climatic event i…

  • A robust, multisite Holocene history of drift ice off northern Iceland

    Open AccessJohn T Andrews, Dennis A Darby et al.ARTICLEThe Holocene2009Cited by: 1References: 7

    An important indicator of Holocene climate change is provided by evidence for variations in the extent of drift ice. A proxy for drift ice in Iceland waters is provided by the presence of quartz. Quantitative x-ray diffraction analysis of the < 2 mm sediment fraction was undertaken on 16 cores from around Iceland. The quartz weight (wt.)% estimates from each core were integrated into 250-yr intervals between −0.05 and 11.7 cal. ka BP. Median quar…

  • Sea ice and marine climate variability for NW Iceland/Denmark Strait over the last 2000 cal. yr BP

    Open AccessJohn T Andrews, Simon T Belt et al.ARTICLEThe Holocene2009Cited by: 2References: 7

    MD99-2263 is a 46 cm box core collected from Djupall, a trough that cuts across the NW Iceland Shelf and ends above Denmark Strait. We provide a multiproxy record that documents changes in the regional marine climate over the last ~1700 yr. The depth/age model is based on seven calibrated radiocarbon dates on mollusk shells and on 210 Pb and 137 Cs. Sediment accumulation rates were variable (0.2—0.8 mm/yr) but increased dramatically ~AD 1500. Gra…

  • Geochemistry of Holocene cryptotephras from the North Iceland Shelf (MD99-2269)

    Open AccessGréta B Kristjánsdóttir, Joseph S Stoner et al.ARTICLEThe Holocene2007Cited by: 6References: 23

    Tephra-grain counting, morphology and geochemistry in the 150–1000 μm size fraction were used to identify 22 individual tephra horizons and one visible tephra layer (Saksunarvatn) from postglacial sediment of the north Iceland shelf. Core MD99-2269 (66°37.53‘N, 20°51.16‘W, water depth 365 m, length 2533 cm) from the Reykjafjardaráll basin is constrained at the base by the Vedde tephra (c. 12 000 cal. yr BP). Geochemical analyses and stratigraphic…

  • An exploratory method to detect tephras from quantitative XRD scans

    Open AccessJohn T Andrews, Dennis D Eberl et al.ARTICLEThe Holocene2006References: 10

    Tephras, mainly from Iceland, are becoming increasingly important in interpreting leads and lags in the Holocene climate system across NW Europe. Here we demonstrate that Quantitative Phase Analysis of x-ray diffractograms of the 150 μm fraction and identify these same peaks in XRD scans two of these correlate geochemically and chronologically with Hekla 1104 and 3. At a distal site to the WNW of Iceland, on the East Greenland margin (core MD99-2…

  • Early to mid-Holocene Atlantic water influx and deglacial meltwater events, Beaufort Sea Slope, Arctic Ocean

    Open AccessJohn T Andrews, Gita DunhillARTICLEQuaternary Research2004

    Holocene high-resolution cores from the margin of the Arctic Ocean are rare. Core P189AR-P45 collected in 405-m water depth on the Beaufort Sea slope, west of the Mackenzie River delta (70°33.03′N and 141°52.08′W), is in close vertical proximity to the present-day upper limit of modified Atlantic water. The 5.11-m core spans the interval between ∼6800 and 10,400 14 C yr B.P. (with an 800-yr ocean reservoir correction). The sediment is primarily s…

  • Holocene thermal maximum in the western Arctic (0–180°W)

    Open AccessD S Kaufman, Thomas A Ager et al.ARTICLEQuaternary Science Reviews2004

  • A high-resolution Holocene sediment record from Húnaflóaáll, N Iceland margin

    Open AccessJohn T Andrews, Jórunn Harđardóttir et al.ARTICLEThe Holocene2003References: 9

    MD99-2269 is a 25 m long core from Hunaflóadll, a deep trough which runs northward towards the shelf break from the narrow neck of land which joins the Northwest Peninsula of Iceland with the ‘mainland’. The core was recovered from the thickest part of an elongate shelf sediment body, underlain by glacial diamictons with ages 26 ka BP. 3.5 kHz profiles indicate the presence of a reflector, RI, which can be traced over long distances. Twelve AMS r…

  • A mid-Holocene shift in Arctic sea-ice variability on the East Greenland Shelf

    Open AccessAnne Jennings, Anne E Jennings et al.ARTICLEThe Holocene2002Cited by: 16References: 6

    Records of iceberg-rafting and palaeohydrography from two East Greenland shelf cores (JM96-1206/1-GC and JM96-1207/1-GC) are reported. Benthic foraminifera, stable isotopes and IRD fluxes indicate a shift toward colder, lower-salinity ‘polar’ conditions c. 5 cal. ka. A new proxy of iceberg-rafting on the East Greenland Shelf is the flux of calcium carbonate (TIC) thought to be derived from glacial erosion of Cretaceous calcareous mudstones. A cha…

  • Multicentury-Scale Records of Carbonate (Hydrographic?) Variability on the Northern Iceland Margin over the Last 5000 Years

    Open AccessJohn T Andrews, Guðrún Helgadóttir et al.ARTICLEQuaternary Research2001

    The waters off northern Iceland are subjected to extreme hydrographic variability on annual to decadal timescales. In years when cold low-salinity water moves coastward and sea ice is prevalent (i.e., the late 1960s), marine productivity of surface waters is low because the water column is well stratified. In the opposite oceanographic mode, warm, salty Atlantic Water dominates the shelf and vertical mixing results in high productivity. We track …

  • Late-Holocene terrestrial glacial history of Miki and I.C. Jacobsen Fjords, East Greenland

    Open AccessÁslaug Geirsdóttir, Jórunn Harđardóttir et al.ARTICLEThe Holocene2000Cited by: 5References: 2

    We present a late-Holocene glacial and environmental history of three valleys within Miki and I.C. Jacobsen Fjords, East Greenland (68°N). The fjords have no direct connection with the main ice sheet and are presently glacierized by a series of local ice caps and glaciers. Little sediment has been deposited within the study area, but bedrock is distinctly glacially striated, which suggests that extensive valley glaciers reached the present coastl…

  • Problems and Possible Solutions Concerning Radiocarbon Dating of Surface Marine Sediments, Ross Sea, Antarctica

    Open AccessJohn T Andrews, Eugene W Domack et al.ARTICLEQuaternary Research1999

    Radiocarbon accelerator mass spectrometric (AMS) dates on the acid-insoluble fraction from 38 core tops from the western Ross Sea, Antarctica, are used to address these questions: (1) What are the apparent ages of sediments at or close to the present sediment/water interface? (2) Is there a statistically significant pattern to the spatial distribution of core top ages? and (3) Is there a “correction factor” that can be applied to these age determ…

  • Late Pleistocene-Holocene marine conditions in the Ross Sea, Antarctica

    Open AccessWendy L Cunningham, Amy Leventer et al.ARTICLEThe Holocene1999Cited by: 4

    Statistical analyses of diatom assemblages from radiocarbon-dated sediment cores were used to reconstruct changing palaeoceanographic conditions in the western and west-central Ross Sea, Antarctica, from. c.12 14 C kyr BP to the present. Data from three Kasten cores support a north-to-south time-transgressive glacial/interglacial transition. Assemblages at the base of each core suggest that glacial processes affecting frustule preservation were s…

  • Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea

    Open AccessJohn T Andrews, Helmut Erlenkeuser et al.ARTICLEQuaternary Research1994

    Two major meltwater events are documented in cores from the NW Labrador Sea. One occurred ca. 20,000 14 C yr B.P. in association with deposition of a major detrital carbonate unit. Both prior to and after this event, δ 18 O values of near-surface planktonic foraminifera were 4.5%, indicating fully enriched glacial values. A younger event (ca. 14,000 14 C yr B.P.) is characterized by a dramatic change in δ 18 O from 4.5 to 2.0% and coincided with …

  • Evidence for massive discharges of icebergs into the North Atlantic ocean during the last glacial period

    Open AccessGérard C Bond, Gerard Bond et al.ARTICLENature1992

  • Baffin Island Fjord Macrobenthos

    Open AccessJames P M Syvitski, George E Farrow et al.ARTICLEARCTIC1989

    Cluster analysis of the benthos from ten Baffin Island fjords defines six faunal associations. The macrotidal Sunneshine Fiord has a shallow kelp-related Isopod Association. Cambridge Fiord supports a shallow Onuphid Association controlled by gravel from dropstones. A widespread Portlandia Association typified the shallow zones of more recently glaciated fjords where sedimentation rates are high. An Ophiuroid-Anemone Association was defined from …

  • Discussion on the Paper by Denton and Hughes (1983)

    Open AccessJohn T Andrews, Gifford H MillerARTICLEQuaternary Research1985

  • Canada

    Open AccessDabney Ford, D C Ford et al.ARTICLECanadian Geographies /…1984References: 34

    Editor's note : The first President's Symposium was held during the cag annual meeting at the University of Winnipeg in 1983. The idea was to air some broad and invigorating topic to which invited specialists from across the country could contribute under presidential direction. The inaugural topic selected by the president, Professor D.C. Ford, was ‘Canada: how many glaciations?’ The specialist contributors certainly learned a great deal, and th…

  • Multiple Deglaciations of the Hudson Bay Lowlands, Canada, Since Deposition of the Missinaibi (Last-Integlacial?) Formation

    Open AccessJohn T Andrews, W W Shilts et al.ARTICLEQuaternary Research1983

    The stratigraphic record in the James and Hudson Bay Lowlands indicates that the sequence of glacial events at the geographical center of the 12.6 × 10 6 km 2 Laurentide Ice Sheet may have been more complex than hitherto imagined. Isoleucine epimerization ratios of in situ and transported shells recovered from till and associated marine and fluvial sediments cluster into at least 4 discrete groups. Two alternative explanations of the data are off…

  • Re-evaluation of Pollen-Climate Transfer Functions in Keewatin, Northern Canada

    Paul Kay, Paul A Kay et al.ARTICLEAnnals of the Association of…1983Cited by: 4References: 20

    Multivariate statistical analyses allow specification of pollen-climate transfer functions useful in studies of paleoclimate. Two previously published models, when applied to two documented sites in Canada's District of Keewatin, produce inconsistent reconstructions of mean July temperatures for the mid- to late-Holocene (approximately the past 5,000 years). The discrepancy between the results arises from differences in the construction of the fu…