John E Kutzbach

Biographic Data

ID4888570
NAMEJohn E Kutzbach
GIVEN NAMESJohn E
FAMILY NAMEKutzbach
SIGNATUREKUTZBACH J E
AFFILIATIONSUniversity of Wisconsin–Madison
VERIFIEDNo
TOTAL WORKS30
TOTAL CITATIONS72
AUTHOR COUNT30
EDITOR COUNT0
FIRST PUBLICATION YEAR1974
LATEST PUBLICATION YEAR2022
H-INDEX4

  • Did agriculture beget agriculture during the past several millennia

    Open AccessS J Vavrus, Christopher J Kucharik et al.ARTICLEThe Holocene2022References: 4

    The Early Anthropogenic Hypothesis posits that carbon emissions from ancient farming caused global warming by raising greenhouse gas concentrations (GHG) during the late-Holocene, in contrast to declining GHG during prior interglacials. Here, we explore whether this hypothesized pre-industrial anthropogenic climate change also fostered agriculture by creating more favorable growing conditions. We investigate this question using transient GCM expe…

  • Rapid neoglaciation on Ellesmere Island promoted by enhanced summer snowfall in a transient climate model simulation of the middle-late-Holocene

    Open AccessS J Vavrus, Feng He et al.ARTICLEThe Holocene2020References: 3

    Arctic neoglaciation following the Holocene Thermal Maximum is an important feature of late-Holocene climate. We investigated this phenomenon using a transient 6000-year simulation with the CESM-CAM5 climate model driven by orbital forcing, greenhouse gas concentrations, and a land use reconstruction. During the first three millennia analyzed here (6–3 ka), mean Arctic snow depth increases, despite enhanced greenhouse forcing. Superimposed on thi…

  • Does pre-industrial warming double the anthropogenic total

    Open AccessWilliam Ruddiman, William F Ruddiman et al.ARTICLEThe Anthropocene Review2014Cited by: 6References: 18

    According to the early anthropogenic hypothesis, land clearing and agriculture caused emissions of greenhouse gases to begin to alter climate as early as 7000 years ago (Ruddiman, 2003). Climate-model simulations based on the CO2 and CH4 concentrations proposed in the hypothesis suggest that humans caused a global mean warming of 0.9 to 1.5°C before the start of the industrial era. Additional pre-industrial effects on land surface reflectance (ch…

  • The role of GCM resolution in simulating glacial inception

    Open AccessSteve Vavrus, Gwenaëlle Philippon-Berthier et al.ARTICLEThe Holocene2011Cited by: 2References: 5

    We test the influence of model resolution on glacial inception using a coupled atmosphere–slab ocean version of NCAR’s CCSM3 GCM. Simulations employ a modern orbital configuration and greenhouse gas concentrations representing both recent (year 1990) and hypothetically lower values based on Ruddiman’s Early Anthropogenic Hypothesis (240 ppm CO 2 , 450 ppb CH 4 ). We ran the model at two different horizontal resolutions: relatively coarse (spectra…

  • Comparisons of atmosphere–ocean simulations of greenhouse gas-induced climate change for pre-industrial and hypothetical ‘no-anthropogenic’ radiative forcing, relative to present day

    Open AccessJohn E Kutzbach, Steve Vavrus et al.ARTICLEThe Holocene2011Cited by: 4References: 8

    We compare climate simulations for Present-Day (PD), Pre-Industrial (PI) time, and a hypothetical (inferred) state termed No-Anthropogenic (NA) based upon the low greenhouse gas (GHG) levels of the late stages of previous interglacials that are comparable in time (orbital configuration) to the present interglacial. We use a fully coupled dynamical atmosphere–ocean model, the CCSM3. We find a consistent trend toward colder climate (lower surface t…

  • Can natural or anthropogenic explanations of late-Holocene CO 2 and CH 4 increases be falsified

    Open AccessWilliam F Ruddiman, John E Kutzbach et al.ARTICLEThe Holocene2011Cited by: 16References: 10

    Concentrations of CO 2 and CH 4 in the atmosphere rose slowly during the millennia prior to the industrial era. Opposing explanations for these increases have invoked natural and anthropogenic sources. Here we revisit this argument using new evidence to see whether either explanation can be falsified (disproven, in the sense proposed by German philosopher Karl Popper). Two lines of evidence suggest that natural explanations for the CH 4 increase …

  • A severe centennial-scale drought in midcontinental North America 4200 years ago and apparent global linkages

    Open AccessRobert K Booth, Stephen T Jackson et al.ARTICLEThe Holocene2005Cited by: 20References: 17

    We present evidence from a variety of physical and biological proxies for a severe drought that affected the mid-continent of North America between 4.1 and 4.3 ka. Rapid climate changes associated with the event had large and widespread ecological effects, including dune reactivation, forest fires and long-term changes in forest composition, highlighting a clear ecological vulnerability to similar future changes. Drought is also documented in the…

  • Evolution of Asian monsoons and phased uplift of the Himalaya–Tibetan plateau since Late Miocene times

    Open AccessZhaolong An, An Zhisheng et al.ARTICLENature2001

  • Asynchronous Holocene optimum of the East Asian monsoon

    Open AccessZhaolong An, Zhisheng An et al.ARTICLEQuaternary Science Reviews2000

  • The Response of Northern Hemisphere Extratropical Climate and Vegetation to Orbitally Induced Changes in Insolation during the Last Interglaciation

    Open AccessSandy P Harrison, John E Kutzbach et al.ARTICLEQuaternary Research1995

    The last interglaciation (substage 5e) provides an opportunity to examine the effects of extreme orbital changes on regional climates. We have made two atmospheric general circulation model experiments: P+T+ approximated the northern hemisphere seasonality maximum near the beginning of 5e; P-T- approximated the minimum near the end of 5e. Simulated regional climate changes have been translated into biome changes using a physiologically based mode…

  • Global Climates since the Last Glacial Maximum

    Open AccessJohn R Mather, H E Wright et al.REVIEWGeographical Review1995

  • University of Wisconsin Radiocarbon Dates XXVI

    Open AccessRaymond L Steventon, John E KutzbachARTICLERadiocarbon1990Cited by: 3References: 7

    Procedures and equipment used in the University of Wisconsin laboratory have been described in previous date lists (Bender, Bryson & Baerreis 1965; Steventon & Kutzbach 1986). Except as otherwise indicated, wood, charcoal and peat samples are pretreated with dilute NaOH-NA 4 P 2 O 7 and dilute H 3 PO 4 before conversion to counting gas methane; when noted, marls and lake cores are treated with acid only. Very calcareous materials are treated with…

  • University of Wisconsin Radiocarbon Dates XXV

    Open AccessRaymond L Steventon, John E KutzbachARTICLERadiocarbon1988Cited by: 4References: 11

    Procedures and equipment used in the University of Wisconsin laboratory have been described in previous date lists. Except as otherwise indicated, wood, charcoal, and peat samples are pretreated with dilute NaOH—NA 4 P 2 O 7 and dilute H 3 PO 4 before conversion to the counting gas methane; when noted, marls and lake cores are treated with acid only. Very calcareous materials are treated with HCL instead of H 3 PO 4 . Pretreatment of bone varies …

  • University of Wisconsin Radiocarbon Dates XXIV

    Open AccessRaymond L Steventon, John E KutzbachARTICLERadiocarbon1987Cited by: 3References: 11

    Procedures and equipment used in the University of Wisconsin laboratory have been described in previous date lists. Except as otherwise indicated, wood, charcoal, and peat samples are pretreated with dilute NaOH—NA 4 P 2 O 7 and dilute H 3 PO 4 before conversion to the counting gas methane; when noted, marls and lake cores are treated with acid only. Very calcareous materials are treated with HCL instead of H 3 PO 4 . Pretreatment of bone varies …

  • Middle Holocene Dry Period in the Northern Midwestern United States

    Open AccessMarjorie Green Winkler, Albert M Swain et al.ARTICLEQuaternary Research1986

    Four cores from Lake Mendota in the Yahara River valley of south-central Wisconsin provide pollen, charcoal, and sediment-year. Derived estimates of stratigraphic evidence of a middle Holocene dry period in the northern Midwest. The lake level was lower between about 6500 and 3500 yr B.P. indicating that runoff from the upper Yahara River basin may have ceased during the drier seasons of the precipitation between 6500 and 3500 yr B.P. indicate a …

  • University of Wisconsin Radiocarbon Dates XXIII

    Open AccessRaymond L Steventon, John E KutzbachARTICLERadiocarbon1986Cited by: 6References: 7

    Procedures and equipment used in the University of Wisconsin laboratory have been described in previous date lists. The preamplifiers and counting system were replaced in 1977 using modified EC & G Ortec components. Except as otherwise indicated, wood, charcoal, and peat samples are pretreated with dilute NaOH-Na 4 P 2 O 7 and dilute H 3 PO 4 before conversion to the counting gas methane; when noted marls and lake cores are treated with acid only…

  • Late Pleistocene Climate and Water Budget of the South American Altiplano

    Open AccessStefan Hastenrath, John Kutzbach et al.ARTICLEQuaternary Research1985

    Geomorphic evidence from the Peruvian-Bolivian Altiplano indicates that during episodes prior to 28,000 and around 12,500-11,000 yr B.P., lakes covered an area about six and four times as large as at present, respectively. Within the constraints of the heat and water budget, model calculations are used to estimate the precipitation rate that would allow hydrologic equilibrium. On this basis it is suggested that rainfall on the Altiplano during th…

  • Milankovitch forcing of fluctuations in the level of tropical lakes from 18 to 0 kyr BP

    Open AccessJohn E Kutzbach, F Alayne Street‐perrottARTICLENature1985

  • University of Wisconsin Radiocarbon Dates XXII

    Open AccessRaymond L Steventon, John E KutzbachARTICLERadiocarbon1985Cited by: 2References: 6

    Procedures and equipment used in the University of Wisconsin laboratory have been described in previous date lists (Steventon & Kutzbach 1983; 1984). Except as otherwise indicated, wood, charcoal, and peat samples are pretreated with dilute NaOH-Na 4 P 2 O 7 and dilute H 3 PO 4 before conversion to the counting gas methane; when noted, marls and lake cores are treated with acid only. Very calcareous materials are treated with HCl instead of H 3 P…

  • University of Wisconsin Radiocarbon Dates XXI

    Open AccessRaymond L Steventon, John E KutzbachARTICLERadiocarbon1984Cited by: 2References: 7

    Procedures and equipment used in the University of Wisconsin laboratory have been described in previous date lists. Except as otherwise indicated, wood, charcoal, and peat samples are pretreated with dilute NaOH-Na 4 P 2 O 7 and dilute H 3 PO 4 before conversion to the counting gas methane; marls and lake cores are treated with acid only. Very calcareous materials are treated with HCl instead of H 3 PO 4 . Pretreatment of bone varies with the con…

  • Paleoclimatic Estimates from Water and Energy Budgets of East African Lakes

    Open AccessStefan Hastenrath, John E KutzbachARTICLEQuaternary Research1983

    The Turkana, Nakuru-Elmenteita, and Naivasha basins in the Rift Valley of East Africa experienced high water levels during the period of 10,000–7000 yr B.P. Analyses of the modern hydrologic and energy budgets for these basins, along with that of Lake Victoria, were used to infer the amount of precipitation that would have been required to maintain the enlarged paleolakes of the early Holocene. Precipitation must have been at least 150–300 mm/yr …

  • Estimates of Holocene Precipitation for Rajasthan, India, Based on Pollen and Lake-Level Data

    Open AccessAlbert M Swain, John E Kutzbach et al.ARTICLEQuaternary Research1983

    A pollen profile obtained from lake sediments at Lunkaransar, Rajasthan, in northwest India was used along with a pollen-climate calibration function to estimate past precipitation. Between 10,500 and 3500 yr B.P., the estimated precipitation was about 500 mm/yr, or about 200 mm/yr above the modern value. A model was used for the energy and hydrologic budget of a lake basin and lake at Sambhar (located 240 km SE of Lunkaransar) to calculate that …

  • University of Wisconsin Radiocarbon Dates XX

    Open AccessRaymond L Steventon, John E KutzbachARTICLERadiocarbon1983Cited by: 4References: 10

    Procedures and equipment have been described in previous date lists. Except as otherwise indicated, wood, charcoal, and peat samples are pretreated with dilute NaOH–Na 4 P 2 O 7 and dilute H 3 PO 4 before conversion to the counting gas methane; marls and lake cores are treated with acid only. Very calcareous materials are treated with HCl instead of H 3 PO 4 . Pretreatment of bone varies with the condition of the bone sample; solid bone with litt…

  • Monsoon Climate of the Early Holocene

    Open AccessJohn E KutzbachARTICLEScience1981

    Values for the precession and obliquity of the earth 9000 years ago indicate that the global average solar radiation for July 9000 years ago was 7 percent greater than at present. When the estimated solar radiation values are used in a low-resolution climate model, the model simulates an intensified continent-scale monsoon circulation. This result agrees with paleoclimatic evidence from Africa, Arabia, and India that monsoon rains were stronger b…

  • Estimates of Past Climate at Paleolake Chad, North Africa, Based on a Hydrological and Energy-Balance Model

    Open AccessJohn E KutzbachARTICLEQuaternary Research1980

    Modeling the combined hydrological and energy balances of Paleolake Chad and its drainage basin yields an estimate of at least 650 mm/yr for annual precipitation during portions of the early Holocene (10,000 to 5000 yr B.P.); the current rainfall in Chad Basin is 350 mm/yr. Two versions of the model are developed. The first version is one in which precipitation and lake area are linearly related. This version requires specification first of the a…