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I am a paleoclimatologist, dendrochronologist, and earth systems geographer specializing in the reconstruction and analysis of climate variability and change over the Common Era and the interaction between past climate and human society.VOSviewer
Courses
- EEIPGEarth's Environment: Introduction to Physical Geography
- TCSThe Climate System
- OCCOur Changing Climate
Grants
- Track 2 MRI: Acquisition of a mini carbon dating system for multi-millennial, multi-user sequences of annually resolved 14C and other high precision applications
Co-Investigator (COI)
2022
$2.0M
Active - Track 2 MRI: Acquisition of a mini carbon dating system for multi-millennial, multi-user sequences of annually resolved 14C and other high precision applications
Co-Investigator (COI)
2022
$752.0K
Active - Collaborative Research: Tracking Divergent Warming and Tree Growth at Arctic Treeline
Principal Investigator (PI)
2022
$204.0K
Active - Collaborative Research: P2C2 - High-Resolution Reconstruction of Last Millennium North American Arctic Temperatures Using Quantitative Wood Anatomy
Principal Investigator (PI)
2021
$471.7K
Active - paleoCAMP: A Multidisciplinary Summer School For Graduate Students In Paleoclimatology
Co-Investigator (COI)
2021
$425.2K
Active - Rainfall Variability, Extreme Events, and Vulnerability in Heterogeneous Social and Environmental Systems
Principal Investigator (PI)
2021
$396.6K
Active - Collaborative Research: OpenDendro - Advanced Open-Source Tools for Paleoenvironmental Reconstruction
Principal Investigator (PI)
2021
$143.1K
Active - Drivers of Oscillations in Western US Cool-season Precipitation
Principal Investigator (PI)
2021
$89.9K
Active - CNH2-L: Feedbacks between Urban Food Security and Rural Agricultural Systems
Principal Investigator (PI)
2019
$1.6M
Active - Collaborative Research: 2000 Years of Variability in the Southern Annular Mode (SAM) from Tree Rings and Ice
Principal Investigator (PI)
2019
$149.9K
Active
News
- Tree Rings and the Laki Volcano Eruption: A Closer Look at Climate
2021
- Positive Societal Response to Past Climate Variability Sets an Example for Today
2021
- Virtual Science Lecture Series to Examine Water's Cosmic Past and Challenging Future
2021
- When Reporting Climate-Driven Human Migration, Place Matters
2019
- UA Tree-Ring Research Helps Analyze Droughts in Mongolia
2018
- For Threatened Coffee Crops, Tree Rings May Offer Answers
2017
- Drought in Eastern Mediterranean Worst of Past 900 Years
2016
- 20th Century One of Driest in Nine Centuries for Northwest Africa
2010
- Megadroughts in Sub-Saharan Africa Normal for the Region
2009
Publications (107)
Recent
- Intra-Annual Climate Anomalies in Northwestern North America Following the 1783--1784 CE Laki Eruption
2022
- The Origin of Tree-Ring Reconstructed Summer Cooling in Northern Europe During the 18th Century Eruption of Laki
2022
- Paleohydrological context for recent floods and droughts in the Fraser River Basin, British Columbia, Canada
2021
- A Band Model of Cambium Development: Opportunities and Prospects
2021
- Pattern-based downscaling of snowpack variability in the western United States
2021
- Spatiotemporal Peatland Productivity and Climate Relationships Across the Western South American Altiplano
2021
- The influence of decision-making in tree ring-based climate reconstructions
2021
- Towards a rigorous understanding of societal responses to climate change
2021
- Glacial-Interglacial Shifts Dominate Tropical Indo-Pacific Hydroclimate During the Late Pleistocene
2021
- Tree Rings and Observations Suggest No Stable Cycles in Sierra Nevada Cool-Season Precipitation
2021
- A data assimilation approach to last millennium temperature field reconstruction using a limited high-sensitivity proxy network
2021
- Increased drought severity tracks warming in the United States’ largest river basin
2020
- Does signal-free detrending increase chronology coherence in large tree-ring networks?
2020
- An interpreted language implementation of the Vaganov--Shashkin tree-ring proxy system model
2020
- A late Holocene subfossil Atlantic white cedar tree-ring chronology from the northeastern United States
2020
- A framework for determining population-level vulnerability to climate: evidence for growth hysteresis in Chamaecyparis thyoides along its contiguous latitudinal distribution
2020
- Resolving the differences in the simulated and reconstructed temperature response to volcanism
2020
- A narrow window of summer temperatures associated with shrub growth in Arctic Alaska
2020
- Twenty-first century drought projections in the CMIP6 forcing scenarios
2020
- Snowpack signals in North American tree rings
2020
- Topography influences species-specific patterns of seasonal primary productivity in a semiarid montane forest
2020
- Multivariate climate field reconstructions using tree rings for the northeastern United States
2020
- Improved dendroclimatic calibration using blue intensity in the southern Yukon
2019
- The potential to strengthen temperature reconstructions in ecoregions with limited tree line using a multispecies approach
2019
- Tree-ring reconstructions of cool season temperature for far southeastern Australia, 1731--2007
2019
- A high yield cellulose extraction system for small whole wood samples and dual measurement of carbon and oxygen stable isotopes
2019
- Multiscale trends and precipitation extremes in the Central American Midsummer Drought
2019
- Radiocarbon and geologic evidence reveal Ilopango volcano as source of the colossal `mystery' eruption of 539/40 CE
2019
- A Euro-Mediterranean tree-ring reconstruction of the winter NAO index since 910CE
2019
- A double bootstrap approach to Superposed Epoch Analysis to evaluate response uncertainty
2019
- Coupled Modes of North Atlantic Ocean-Atmosphere Variability and the Onset of the Little Ice Age
2019
- Climate Change and Drought: From Past to Future
2018
- Large-scale, millennial-length temperature reconstructions from tree-rings
2018
- Spatiotemporal Variability in the Climate Growth Response of High Elevation Bristlecone Pine in the White Mountains of California
2018
- Past and Future Drought in Mongolia
2018
- Freshwater Stress on Small Island Developing States: Population Projections and Aridity Changes at 1.5oC and 2oC
2018
- Tree Rings, Climate, and the Communal Forests of Totonicapán, Guatemala
2018
- Strip-bark morphology and radial growth trends in ancient Pinus sibirica trees from central Mongolia
2018
- Isotopic characterization of late Neogene travertine deposits at Barrancas Blancas in the eastern Atacama Desert, Chile
2017
- European and Mediterranean hydroclimate responses to tropical volcanic forcing over the last millennimum
2017
- Effects of Drought on Xylem Anatomy and Water-Use Efficiency of Two Co-Occurring Pine Species
2017
- Tree rings reveal climate change past, present, and future
2017
- Last millennium Northern Hemisphere summer temperatures from tree rings: Part II, spatially resolved reconstructions
2017
- A global multiproxy database for temperature reconstructions of the Common Era
2017
- Tree growth and vegetation activity at the ecosystem-scale in the eastern Mediterranean
2017
- Climate controls on tree growth in the Western Mediterranean
2017
- Experiments based on blue intensity for reconstructing North Pacific temperatures along the Gulf of Alaska
2017
- Comparing proxy and model estimates of hydroclimate variability and change over the Common Era
2017
- On the Production of Climate Information in the High Mountain Forests of Guatemala
2017
- Internal ocean-atmosphere variability drives megadroughts in Western North America
2016
- Last millennium northern hemisphere summer temperatures from tree rings: Part I: The long term context
2016
- Spatiotemporal drought variability in the Mediterranean over the last 900years
2016
- Detection and removal of disturbance trends in tree-ring series for dendroclimatology
2016
- Future freshwater stress for island populations
2016
- On the A.D. 1815 Tambora eruption and the matter of misplaced tree rings
2015
- Multi-scale drought and ocean-atmosphere variability in monsoon Asia
2015
- Tree-ring reconstructed dry season rainfall in Guatemala
2015
- A long-term context (931-2005 C.E.) for rapid warming over Central Asia
2015
- Tree-ring reconstructed temperature index for coastal northern Japan: implications for western North Pacific variability
2015
- Tropical sea surface temperatures for the past four centuries reconstructed from coral archives
2015
- Volcanic eruptions and climate
2015
- Reconstructed summer temperatures over the last 400~years based on larch ring widths: Sakhalin Island, Russian Far East
2015
- Pluvials, droughts, the Mongol Empire, and modern Mongolia
2014
- Dendroclimatology in the eastern Mediterranean
2014
- Dendrochronological Dating of the World Trade Center Ship, Lower Manhattan, New York City
2014
- Spatial patterns of eastern Mediterranean climate influence on tree growth
2014
- How unusual is the 2012-2014 California drought?
2014
- Identifying coherent spatiotemporal modes in time-uncertain proxy paleoclimate records
2013
- Multidecadal variability in East African hydroclimate controlled by the Indian Ocean
2013
- Bayesian parameter estimation and interpretation for an intermediate model of tree-ring width
2013
- Tree-Ring-Reconstructed Summer Temperatures from Northwestern North America during the Last Nine Centuries
2013
- Annual chronology and climate response in Abies guatemalensis Rehder (Pinaceae) in Central America
2013
- Links between Indo-Pacific climate variability and drought in the Monsoon Asia Drought Atlas
2013
- Volcanic cooling signal in tree ring temperature records for the past millennium
2013
- Continental-scale temperature variability during the past two millennia
2013
- Tree-ring reconstructed summer temperature anomalies for temperate East Asia since 800 CE
2013
- Paleoclimate histories improve access and sustainability in index insurance programs
2013
- A large-scale coherent signal of canopy status in maximum latewood density of tree rings at arctic treeline in North America
2013
- Applications of proxy system modeling in high resolution paleoclimatology
2013
- A long-term perspective on a modern drought in the American Southeast
2012
- Regional climatic and North Atlantic Oscillation signatures in West Virginia red cedar over the past millennium
2012
- Pre-Columbian deforestation as an amplifier of drought in Mesoamerica
2012
- Tree rings and volcanic cooling
2012
- Snow cover and precipitation impacts on dry season streamflow in the Lower Mekong Basin
2012
- Forced and unforced variability of twentieth century North American droughts and pluvials
2011
- Long tree-ring chronologies reveal 20th century increases in water-use efficiency but no enhancement of tree growth at five Iberian pine forests
2011
- SEASCORR: A MATLAB program for identifying the seasonal climate signal in an annual tree-ring time series
2011
- Repurposing climate reconstructions for drought prediction in Southeast Asia
2011
- Spatiotemporal drought variability in northwestern Africa over the last nine centuries
2011
- Varying boreal forest response to Arctic environmental change at the Firth River, Alaska
2011
- An efficient forward model of the climate controls on interannual variation in tree-ring width
2011
- A Homogeneous Record (1896-2006) of Daily Weather and Climate at Mohonk Lake, New York
2010
- Tropical cloud forest climate variability and the demise of the Monteverde golden toad
2010
- Influence of volcanic eruptions on the climate of the Asian monsoon region
2010
- Climate as a contributing factor in the demise of Angkor, Cambodia
2010
- Asian Monsoon Failure and Megadrought During the Last Millennium
2010
- Correction of tree ring stable carbon isotope chronologies for changes in the carbon dioxide content of the atmosphere
2009
- Tree growth and inferred temperature variability at the North American Arctic treeline
2009
- Atlantic Forcing of Persistent Drought in West Africa
2009
- Consequences of a rapid cellulose extraction technique for oxygen isotope and radiocarbon analyses
2008
- Experimental reconstruction of monsoon drought variability for Australasia using tree rings and corals
2008
- Stable isotope chronology and climate signal calibration in neotropical montane cloud forest trees
2008
- Long term context for recent drought in northwestern Africa
2008
- Exorcising the `segment length curse': Summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland
2007
- A forward modeling approach to paleoclimatic interpretation of tree-ring data
2006
- Forward modeling of regional scale tree-ring patterns in the southeastern United States and the recent influence of summer drought
2006
- A 2000-year reconstruction of forest disturbance from southern Pacific Costa Rica
2005