Malcolm K Hughes

Biographic Data

ID5598892
NAMEMalcolm K Hughes
GIVEN NAMESMalcolm K
FAMILY NAMEHughes
SIGNATUREHUGHES M K
AFFILIATIONSUniversity of Arizona
ORCID0000-0003-1062-3167
VERIFIEDYes
TOTAL WORKS25
TOTAL CITATIONS18
WORKS AS AUTHOR25
WORKS AS EDITOR0
FIRST PUBLICATION YEAR1981
LATEST PUBLICATION YEAR2022
H-INDEX2

  • In Memoriam Stepan G. Shiyatov 1933–2021

    Leonid Agafonov, Rashit Hantemirov et al.ARTICLETree-Ring Research2022

  • Harold Clark Fritts 1928–2019

    Steven W Leavitt, Edward R Cook et al.ARTICLETree-Ring Research2019

    Harold C. Fritts [known to many as "Hal"] passed away at his

  • Keith R. Briffa

    Open AccessMalcolm K Hughes, Edward R Cook et al.ARTICLETree-Ring Research2018

    Keith was

  • Trends In Elemental Concentrations of Tree Rings From the Siberian Arctic

    Irina P Panyushkina, Vladimir V Shishov et al.ARTICLETree-Ring Research2016

    The biogeochemistry and ecology of the Arctic environment have been heavily impacted by anthropogenic pollution and climate change. We used ICP-MS to measure concentrations of 26 elements in the AD 1300–2000 tree rings of larch from the Taymyr Peninsula in northern Siberia for studying the interaction between environmental change and wood chemistry. We applied a two-stage data reduction technique to identify trends in the noisy measurement data. …

  • Changing climate response in near-treeline bristlecone pine with elevation and aspect

    Open AccessMatthew W Salzer, Evan R Larson et al.ARTICLEEnvironmental Research Letters2014

    In the White Mountains of California, eight bristlecone pine (Pinus longaeva) tree-ring width chronologies were developed from trees at upper treeline and just below upper treeline along North- and South-facing elevational transects from treeline to ~90 m below. There is evidence for a climate-response threshold between approximately 60–80 vertical m below treeline, above which trees have shown a positive growth-response to temperature and below …

  • Comparing forest measurements from tree rings and a space-based index of vegetation activity in Siberia

    Open AccessAndrew G Bunn, Malcolm K Hughes et al.ARTICLEEnvironmental Research Letters2013

    Different methods have been developed for measuring carbon stocks and fluxes in the northern high latitudes, ranging from intensively measured small plots to space-based methods that use reflectance data to drive production efficiency models. The field of dendroecology has used samples of tree growth from radial increments to quantify long-term variability in ecosystem productivity, but these have very limited spatial domains. Since the cambium m…

  • Twenty-five years of co-evolution of dendroclimatology and Paclim

    Open AccessMalcolm K HughesARTICLEQuaternary International2013

  • Above-treeline Linanthus pungens shrub-chronologies on the eastern Sierra Nevada crest, Mono county, California contain records of precipitation and temperature

    Open AccessRebecca S Franklin, Malcolm K Hughes et al.ARTICLEQuaternary International2013

  • Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly

    Open AccessM Mann, Michael E Mann et al.ARTICLEScience2009

    Patterns of Change The global climate record of the past 1500 years shows two long intervals of anomalous temperatures before the obvious anthropogenic warming of the 20th century: the warm Medieval Climate Anomaly between roughly 950 and 1250 A.D. and the Little Ice Age between around 1400 and 1700 A.D. It has become increasingly clear in recent years, however, that climate changes inevitably involve a complex pattern of regional changes, whose …

  • Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia

    Open AccessM Mann, Michael E Mann et al.ARTICLEProceedings of the National…2008

    Following the suggestions of a recent National Research Council report [NRC (National Research Council) (2006) Surface Temperature Reconstructions for the Last 2,000 Years (Natl Acad Press, Washington, DC).], we reconstruct surface temperature at hemispheric and global scale for much of the last 2,000 years using a greatly expanded set of proxy data for decadal-to-centennial climate changes, recently updated instrumental data, and complementary m…

  • Bristlecone pine tree rings and volcanic eruptions over the last 5000 yr

    Open AccessMatthew W Salzer, Malcolm K HughesARTICLEQuaternary Research2007

    Many years of low growth identified in a western USA regional chronology of upper forest border bristlecone pine ( Pinus longaeva and Pinus aristata ) over the last 5000 yr coincide with known large explosive volcanic eruptions and/or ice core signals of past eruptions. Over the last millennium the agreement between the tree-ring data and volcano/ice-core data is high: years of ring-width minima can be matched with known volcanic eruptions or ice…

  • May–June precipitation reconstruction of southwestern anatolia, Turkey during the last 900 years from tree rings

    Open AccessRamzi Touchan, Ünal Akkemık et al.ARTICLEQuaternary Research2007

    A May–June precipitation reconstruction (AD 1097–2000) has been developed for southwestern Anatolia in Turkey, the longest reported to date in this region. The reconstruction was derived from a regional Juniperus excelsa chronology that was built from material sampled at four sites in the Antalya and Mersin Districts. The regional tree-ring chronology accounts for 51% of the variance of instrumentally observed May–June precipitation. The years AD…

  • Reconstructing the Mediaeval low stands of Mono Lake, Sierra Nevada, California, USA

    Open AccessNicholas E Graham, Malcolm K HughesARTICLEThe Holocene2007Cited by: 2References: 2

    Palaeosimulations of Mono Lake covering the past 2 kyr have been conducted using a water balance model forced with tree-ring derived inflow estimates. The results show two low stands, during the ninth to tenth and twelfth to thirteenth centuries, that agree well in timing and magnitude with those described by Stine (1987, 1990, 1994) on the basis of geomorphic evidence and relict trees and shrubs exposed on Mono Lake's artificially exposed shorel…

  • Exploratory Temperature and Precipitation Reconstructions from the Qinling Mountains, North-Central China

    Gregg M Garfin, Malcolm K Hughes et al.ARTICLETree-Ring Research2005

    February–April (FMA) temperature at Foping (1879–1989) and July–August (JA) precipitation at Xian (1895–1988) have been reconstructed using total ring width (TRW) and maximum latewood density (MXD) from trees in the Qinling Mountains, at the northern limit of the East Asian monsoon, in central China. The Xian JA precipitation reconstruction, albeit short, represents the first well-replicated, crossdated dendroclimatic reconstruction of summer mon…

  • Tree-ring growth curves as sources of climatic information

    Open AccessMukhtar M Naurzbaev, Malcolm K Hughes et al.ARTICLEQuaternary Research2004

    Regional growth curves (RGCs) have been recently used to provide a new basis for removing nonclimatic trend from tree-ring data. Here we propose a different use for RGCs and explore their properties along two transects, one meridional and the other elevational. RGCs consisting of mean ring width plotted against cambial age were developed for larch samples from 34 sites along a meridional transect (55–72°N) in central Siberia, and for 24 sites on …

  • Climate in Medieval Time

    Open AccessRaymond S Bradley, Malcolm K Hughes et al.ARTICLEScience2003

    Many papers have referred to a "Medieval Warm Period." But how well defined is climate in this period, and was it as warm as or warmer than it is today? In their Perspective, Bradley et al. review the evidence and conclude that although the High Medieval (1100 to 1200 A.D.) was warmer than subsequent centuries, it was not warmer than the late 20th century. Moreover, the warmest Medieval temperatures were not synchronous around the globe. Large ch…

  • Northern hemisphere temperatures during the past millennium

    Open AccessM Mann, Michael E Mann et al.ARTICLEGeophysical Research Letters1999

    Building on recent studies, we attempt hemispheric temperature reconstructions with proxy data networks for the past millennium. We focus not just on the reconstructions, but the uncertainties therein, and important caveats. Though expanded uncertainties prevent decisive conclusions for the period prior to AD 1400, our results suggest that the latter 20th century is anomalous in the context of at least the past millennium. The 1990s was the warme…

  • Twentieth-century summer warmth in northern Yakutia in a 600-year context

    Open AccessMalcolm K Hughes, E A Vaganov et al.ARTICLEThe Holocene1999Cited by: 3References: 1

    We report unusual twentieth-century early-summer warmth recorded by larch tree-rings at the north ern tree-line in far northeastern Eurasia (Yakutia). The tree-ring series are strongly replicated and well suited to the detection of fluctuations on interannual to century timescales. They are strongly correlated with local instrumental temperature data. Mean early-summer temperature in the twentieth century significantly exceeds that of any period …

  • Global-scale temperature patterns and climate forcing over the past six centuries

    Open AccessM Mann, Michael E Mann et al.ARTICLENature1998

  • A Single-Year δ 13 C Chronology from Pinus Tabulaeformis (Chinese Pine) Tree Rings at Huangling, China

    Open AccessSteven W Leavitt, Liu Yu et al.ARTICLERadiocarbon1995References: 18

    Individual rings from 1899–1990 were pooled from four radii of four cross-sections obtained from trees at a managed forest site near Huangling, north of Xian in north central China. Splits of wood ground to 20-mesh were analyzed independently at both the Xian and Arizona laboratories, using their respective methods for cellulose isolation, combustion and mass-spectrometric analysis. The δ 13 C results were highly correlated (r 2 = 0.66) and absol…

  • A Preliminary Reconstruction of Rainfall in North-Central China since A.D. 1600 from Tree-Ring Density and Width

    Open AccessMalcolm K Hughes, Wu Xiangding et al.ARTICLEQuaternary Research1994

    May-June (MJ) and April-July (AJ) precipitation at Huashan in north-central China has been reconstructed for the period A.D. 1600 to 1988 using tree-ring density and width from Pinus armandii . MJ precipitation (based on ring width and maximum latewood density) calibrated and cross-validated against local instrumental data more strongly than AJ precipitation (based only on ring width). A major drought was reconstructed for the mid- and late 1920s…

  • Was there a ?medieval warm period?, and if so, where and when?

    Open AccessMalcolm K Hughes, Henry F DíazARTICLEClimatic Change1994

  • Report of the Workshop, “Prospects for Temporal Extension of the Radiocarbon Calibration”, 19 May 1991

    Open AccessMalcolm K Hughes, Steven W LeavittARTICLERadiocarbon1992

    From the 14th International Radiocarbon Conference held in Tucson, AZ, May 20-24, 1991

  • Solar-Powered Kinetic Sculpture

    Andrew Stonyer, Andrew Allan Stonyer et al.ARTICLELeonardo1986

    This article describes the collaborative efforts of a group of artists and scientists to create kinetic sculptures responsive to changes in the heat or light of the sun. Kinetic responses were caused by density changes in liquids or expansion of wax-filled pistons exposed to the sun or by photocells controlling servo motors. Responses which ran counter to viewer expectation were frequently sought. Some issues arising from this collaboration are b…

  • Sapwood estimates in the interpretation of tree-ring dates

    Open AccessMalcolm K Hughes, Stephen J Milsom et al.ARTICLEJournal of Archaeological Science1981Cited by: 13References: 2