Jonathan T Overpeck

Biographic Data

ID3446360
NAMEJonathan T Overpeck
GIVEN NAMESJonathan T
FAMILY NAMEOverpeck
SIGNATUREOVERPECK J T
AFFILIATIONSUniversity of Arizona
ORCID0000-0002-3843-9313
VERIFIEDYes
TOTAL WORKS19
TOTAL CITATIONS35
WORKS AS AUTHOR19
WORKS AS EDITOR0
FIRST PUBLICATION YEAR1985
LATEST PUBLICATION YEAR2015
H-INDEX2

  • Vulnerabilities and opportunities at the nexus of electricity, water and climate

    Open AccessPeter C Frumhoff, Virginia Burkett et al.ARTICLEEnvironmental Research Letters2015

    The articles in this special issue examine the critical nexus of electricity, water, and climate, emphasizing connections among resources; the prospect of increasing vulnerabilities of water resources and electricity generation in a changing climate; and the opportunities for research to inform integrated energy and water policy and management measures aimed at increasing resilience. Here, we characterize several major themes emerging from this r…

  • A 400‐year isotopic record of seabird response to eastern tropical Pacific productivity

    Open AccessJessica L Conroy, Aaron Collins et al.ARTICLEGeo Geography and Environment2015

    Seabirds play an important role in coastal environments, serving as key indicators of marine ecosystem variability as well as biovectors that influence terrestrial productivity and carbon storage. Long‐term estimates of seabird populations remain rare, but lakes that support large seabird populations in their watersheds can archive a history of seabird activity in their sediment records. Here we present a seabird guano‐influenced sediment record …

  • Tidally adjusted estimates of topographic vulnerability to sea level rise and flooding for the contiguous United States

    Open AccessBenjamin Strauss, Benjamin H Strauss et al.ARTICLEEnvironmental Research Letters2012

    Because sea level could rise 1 m or more during the next century, it is important to understand what land, communities and assets may be most at risk from increased flooding and eventual submersion. Employing a recent high-resolution edition of the National Elevation Dataset and using VDatum, a newly available tidal model covering the contiguous US, together with data from the 2010 Census, we quantify low-lying coastal land, housing and populatio…

  • 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 …

  • Holocene changes in eastern tropical Pacific climate inferred from a Galápagos lake sediment record

    Open AccessJessica L Conroy, Jonathan T Overpeck et al.ARTICLEQuaternary Science Reviews2008

  • Numerical Analysis of Modern and Fossil Pollen Data from the Tibetan Plateau

    Caiming Shen, Kam‐biu Liu et al.ARTICLEAnnals of the Association of…2008Cited by: 1References: 39

    This study applies a number of multivariate numerical techniques in the analysis of modern and fossil pollen data for the purpose of paleovegetational reconstruction in the Tibetan Plateau. Modern pollen spectra from 227 sampling sites in the Tibetan Plateau were classified into groups using cluster analysis and detrended correspondence analysis. By comparing the quantitatively derived groups with local vegetation types at sampling locations, the…

  • East African megadroughts between 135 and 75 thousand years ago and bearing on early-modern human origins

    Open AccessChristopher A Scholz, Thomas C Johnson et al.ARTICLEProceedings of the National…2007

    The environmental backdrop to the evolution and spread of early Homo sapiens in East Africa is known mainly from isolated outcrops and distant marine sediment cores. Here we present results from new scientific drill cores from Lake Malawi, the first long and continuous, high-fidelity records of tropical climate change from the continent itself. Our record shows periods of severe aridity between 135 and 75 thousand years (kyr) ago, when the lake's…

  • Holocene variations in the Asian monsoon inferred from the geochemistry of lake sediments in central Tibet

    Open AccessCarrie Morrill, Jonathan T Overpeck et al.ARTICLEQuaternary Research2006

    We present a record of monsoon variations for the early and middle Holocene that is inferred from the geochemistry of sediment cores from Ahung Co, a lake in central Tibet. The resolution of this record is better than 50 yr and the age model is derived from radiocarbon ages of terrestrial charcoal, which eliminates errors associated with the lake hard-water effect. We made down-core geochemical measurements of % carbonate, % organic carbon, C/N a…

  • C Activity and Global Carbon Cycle Changes over the Past 50,000 Years

    Open AccessKonrad A Hughen, K Hughen et al.ARTICLEScience2004

    A series of 14 C measurements in Ocean Drilling Program cores from the tropical Cariaco Basin, which have been correlated to the annual-layer counted chronology for the Greenland Ice Sheet Project 2 (GISP2) ice core, provides a high-resolution calibration of the radiocarbon time scale back to 50,000 years before the present. Independent radiometric dating of events correlated to GISP2 suggests that the calibration is accurate. Reconstructed 14 C …

  • Abrupt changes in the Asian southwest monsoon during the Holocene and their links to the North Atlantic Ocean

    Open AccessAnil K Gupta, David M Anderson et al.ARTICLENature2003

  • A synthesis of abrupt changes in the Asian summer monsoon since the last deglaciation

    Open AccessCarrie Morrill, Jonathan T Overpeck et al.ARTICLEThe Holocene2003Cited by: 23References: 11

    We have compiled 36 previously published palaeoclimate records to determine the timing and spatial pattern of century-scale abrupt changes in Asian monsoon precipitation since the last deglaciation. We identify abrupt events from (1) the interpretations of the authors of these records and (2) the more objective moving t-test calculation. Our results indicate that abrupt climatic changes occurred at ~11.5 cal. ka, 4.5–5.0 cal. ka and ad 1300. At t…

  • Increase in the Asian Southwest Monsoon During the Past Four Centuries

    Open AccessDavid M Anderson, Jonathan T Overpeck et al.ARTICLEScience2002

    Climate reconstructions reveal unprecedented warming in the past century; however, little is known about trends in aspects such as the monsoon. We reconstructed the monsoon winds for the past 1000 years using fossil Globigerina bulloides abundance in box cores from the Arabian Sea and found that monsoon wind strength increased during the past four centuries as the Northern Hemisphere warmed. We infer that the observed link between Eurasian snow c…

  • Synchronous Radiocarbon and Climate Shifts During the Last Deglaciation

    Open AccessKonrad A Hughen, John Southon et al.ARTICLEScience2000

    Radiocarbon data from the Cariaco Basin provide calibration of the carbon-14 time scale across the period of deglaciation (15,000 to 10,000 years ago) with resolution available previously only from Holocene tree rings. Reconstructed changes in atmospheric carbon-14 are larger than previously thought, with the largest change occurring simultaneously with the sudden climatic cooling of the Younger Dryas event. Carbon-14 and published beryllium-10 d…

  • Recent warming in a 500-year palaeotemperature record from varved sediments, Upper Soper Lake, Baffin Island, Canada

    Open AccessKonrad A Hughen, Jonathan T Overpeck et al.ARTICLEThe Holocene2000Cited by: 9References: 1

    Laminated sediments from Upper Soper Lake on southern Baffin Island provide a new 500-year record of temperature change in the Arctic. Radiometric dating, using 210 Pb and Pu, shows that the light-and dark-coloured laminae couplets are annually deposited varves. Dark laminae thickness is strongly correlated to average June temperature from Kimmirut (r = 0.82), reflecting the influence of temperature on snowmelt and fluxes of runoff and suspended …

  • Deglacial changes in ocean circulation from an extended radiocarbon calibration

    Open AccessKonrad A Hughen, Jonathan T Overpeck et al.ARTICLENature1998

  • Arctic Environmental Change of the Last Four Centuries

    Open AccessJonathan T Overpeck, J Overpeck et al.ARTICLEScience1997

    A compilation of paleoclimate records from lake sediments, trees, glaciers, and marine sediments provides a view of circum-Arctic environmental variability over the last 400 years. From 1840 to the mid-20th century, the Arctic warmed to the highest temperatures in four centuries. This warming ended the Little Ice Age in the Arctic and has caused retreats of glaciers, melting of permafrost and sea ice, and alteration of terrestrial and lake ecosys…

  • A New 14 C Calibration Data Set for the Last Deglaciation Based on Marine Varves

    Open AccessKonrad A Hughen, Jonathan T Overpeck et al.ARTICLERadiocarbon1997Cited by: 2References: 35

    Varved sediments of the tropical Cariaco Basin provide a new 14 C calibration data set for the period of deglaciation (10,000 to 14,500 years before present: 10–14.5 cal ka bp). Independent evaluations of the Cariaco Basin calendar and 14 C chronologies were based on the agreement of varve ages with the GISP2 ice core layer chronology for similar high-resolution paleoclimate records, in addition to 14 C age agreement with terrestrial 14 C dates, …

  • The southwest Indian Monsoon over the last 18 000 years

    Open AccessJonathan T Overpeck, Jonathan Overpeck et al.ARTICLEClimate Dynamics1996

  • Quantitative Interpretation of Fossil Pollen Spectra

    Open AccessJonathan T Overpeck, T Webb et al.ARTICLEQuaternary Research1985

    Dissimilarity coefficients measure the difference between multivariate samples and provide a quantitative aid to the identification of modern analogs for fossil pollen samples. How eight coefficients responded to differences among modern pollen samples from eastern North America was tested. These coefficients represent three different classes: (1) unweighted coefficients that are most strongly influenced by large-valued pollen types, (2) equal-we…