Michael Hren
Associate Professor/Earth Sciences
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Scholarly Contributions
139 Scholarly Contributions
Michael Hren
, (2025). The sensitivity of reconstructed carbon dioxide concentrations to stomatal preparation methods using a leaf gas exchange model, Applications in Plant Sciences
Research Type: Journal Article
Research Type: Journal Article
Evaluation of LSTM vs. conceptual models for hourly rainfall runoff simulations with varied training period lengths
Research Type: Journal Article
Michael Hren,
, (2025). Spatiotemporal flood depth and velocity dynamics using a convolutional neural network within a sequential Deep-Learning framework, Environmental Modelling and Software, vol. 185, iss. Issue, Elsevier Ltd, 10.1016/j.envsoft.2024.106307
Research Type: Journal Article
Michael Hren
, (2025). Seasonal Variation in δ13Cn‐alkane and δ13C/ δ15N of Bulk Leaves of Four Riparian Plants: Implications for Biomarker Carbon Isotope Records of Past Environments, Journal of Geophysical Research: Biogeosciences
Research Type: Journal Article
Michael Hren
, (2025). Locally produced leaf wax biomarkers in the high-altitude Areguni Mountains outweigh downstream transport, Biogeosciences
Research Type: Journal Article
Michael Hren
, (2024). Regional Variations of the Azores High Across Glacial-Interglacial Timescales, Paleoceanography and Paleoclimatology
Research Type: Journal Article
Weathering pulses during glacial-interglacial transitions: Insights from well-dated paleosols in the Azores volcanic province (Central North Atlantic)
Michael Hren,
, (2024). Weathering pulses during glacial-interglacial transitions: Insights from well-dated paleosols in the Azores volcanic province (Central North Atlantic), Quaternary Science Reviews, vol. 324, pp. 108438, Pergamon
Research Type: Journal Article
Evidence for variations in cryogenic extraction deuterium biases of plant xylem water across foundational northeastern US trees
Michael Hren
, (2024). Evidence for variations in cryogenic extraction deuterium biases of plant xylem water across foundational northeastern US trees, Hydrological Processes
Research Type: Journal Article
Proto-monsoon rainfall and greening in Central Asia due to extreme early Eocene warmth
Research Type: Journal Article
Legacy Impacts and Recovery of \delta15N, \delta13C and C/N Storage in Soils Due to Historic Land Use
Michael Hren
, (2024). Legacy Impacts and Recovery of \delta15N, \delta13C and C/N Storage in Soils Due to Historic Land Use, Anthropocene, pp. 100435, Elsevier
Research Type: Journal Article
Legacy impacts and recovery of δ15N, δ13C and C/N storage in soils due to historic land use
Michael Hren
, (2024). Legacy impacts and recovery of δ15N, δ13C and C/N storage in soils due to historic land use, Anthropocene, vol. 46
Research Type: Journal Article
The environmental and cultural background for the reoccupation of the Armenian Highlands after the Last Glacial Maximum: The contribution of Kalavan 6
Michael Hren
, (2024). The environmental and cultural background for the reoccupation of the Armenian Highlands after the Last Glacial Maximum: The contribution of Kalavan 6, Journal of Archaeological Science: Reports, vol. 56
Research Type: Journal Article
River Floodplains, Organic Carbon, and Paleoclimate: How River Dynamics Impart Biases in the Biogeochemical Climate Record of Terrestrial Landscapes
Michael Hren,
, (2024). River Floodplains, Organic Carbon, and Paleoclimate: How River Dynamics Impart Biases in the Biogeochemical Climate Record of Terrestrial Landscapes, EarthArXiv
Research Type: Journal Article
Michael Hren,
, (2024). Constructing Long-Term Hydrographs for River Climate-Resilience: A Novel Approach for Studying Centennial to Millennial River Behavior, Water Resources Research, vol. 60, iss. 10, John Wiley and Sons Inc, 10.1029/2024WR037666
Research Type: Journal Article
Differential effects of clay mineralogy on thermal maturation of sedimentary n-alkanes
Michael Hren
, (2023). Differential effects of clay mineralogy on thermal maturation of sedimentary n-alkanes, Chemical Geology, vol. 634, pp. 121572, Elsevier
Research Type: Journal Article
River Response to Environmental Change: Leveraging Earth’s Self-recorded Sedimentary and Biogeochemical Archives to Calibrate Hydrologic and Geomorphic Models
Michael Hren,
, (2023). River Response to Environmental Change: Leveraging Earth’s Self-recorded Sedimentary and Biogeochemical Archives to Calibrate Hydrologic and Geomorphic Models, AGU23, AGU
Research Type: Journal Article
Integrating Stable Water and Bulk Carbon Isotope Compositions: Measuring Spring Onset Water-Use in Conifers
Michael Hren,
, (2023). Integrating Stable Water and Bulk Carbon Isotope Compositions: Measuring Spring Onset Water-Use in Conifers, AGU23, AGU
Research Type: Journal Article
STRATIGRAPHY OF THE FRASNIAN-FAMENNIAN BOUNDARY INTERVAL IN SHALLOWMARINE PALEOENVIRONMENTS OF NEW YORK AND NORTH-CENTRAL PENNSYLVANIA (WISCOY--CANEADEA FORMATIONS, UPPER DEVONIAN).
Michael Hren,
, (2023). STRATIGRAPHY OF THE FRASNIAN-FAMENNIAN BOUNDARY INTERVAL IN SHALLOWMARINE PALEOENVIRONMENTS OF NEW YORK AND NORTH-CENTRAL PENNSYLVANIA (WISCOY--CANEADEA FORMATIONS, UPPER DEVONIAN)., Bulletins of American Paleontology
Research Type: Journal Article
Evaluating Multi-scale Inputs LSTM vs Conceptual Models for Hourly Rainfall-Runoff Simulations
Michael Hren
, (2023). Evaluating Multi-scale Inputs LSTM vs Conceptual Models for Hourly Rainfall-Runoff Simulations, AGU23, AGU
Research Type: Journal Article
Michael Hren
, (2023). A multidisciplinary approach to resolving the end-Guadalupian extinction, Evolving Earth
Research Type: Journal Article
Reconstructing Hydrodynamics and Sediment Transport through Ephemeral Streams during the Oligocene Intensification of the North American Monsoon
Michael Hren,
, (2023). Reconstructing Hydrodynamics and Sediment Transport through Ephemeral Streams during the Oligocene Intensification of the North American Monsoon, AGU23, AGU
Research Type: Journal Article
Rapid topographic growth of the Taiwan orogen since ~1.3-1.5 Ma
Research Type: Journal Article
Rapid topographic growth of the Taiwan orogen since ∼1.3-1.5 Ma
Michael Hren,
, (2023). Rapid topographic growth of the Taiwan orogen since ∼1.3-1.5 Ma, Science Advances, vol. 9, iss. 25
Research Type: Journal Article
The Evolution of River Landscapes during the Eocene-Oligocene Transition in Central North America
Michael Hren
, (2023). The Evolution of River Landscapes during the Eocene-Oligocene Transition in Central North America, AGU23, AGU
Research Type: Journal Article
Hydroclimate-fire links in the Western US through the last deglaciation as recorded by PAHs within a speleothem
Michael Hren,
, (2023). Hydroclimate-fire links in the Western US through the last deglaciation as recorded by PAHs within a speleothem, AGU23, AGU
Research Type: Journal Article
Lessons Learned and New Approaches to Long-Term Fluvial Geomorphic Modeling
Michael Hren
, (2023). Lessons Learned and New Approaches to Long-Term Fluvial Geomorphic Modeling, AGU23, AGU
Research Type: Journal Article
The Influence of Convection on Estimating Paleotopography with Precipitation Isotopes.
Michael Hren,
, (2023). The Influence of Convection on Estimating Paleotopography with Precipitation Isotopes., AGU23, AGU
Research Type: Journal Article
Organic Molecular Paleohypsometric Reconstruction Reveals Rapid Growth of Taiwan Hsuehshan Range.
Michael Hren,
, (2023). Organic Molecular Paleohypsometric Reconstruction Reveals Rapid Growth of Taiwan Hsuehshan Range., AGU23, AGU
Research Type: Journal Article
Cenozoic topographic evolution of the Southern Central Andes foreland as revealed by hydrogen stable isotopes in hydrated volcanic glass
Michael Hren,
, (2023). Cenozoic topographic evolution of the Southern Central Andes foreland as revealed by hydrogen stable isotopes in hydrated volcanic glass, Earth and Planetary Science Letters, vol. 604, pp. 117991, Elsevier
Research Type: Journal Article
Rapid topographic growth of the Taiwan orogen since\~ 1.3--1.5 Ma
Michael Hren,
, (2023). Rapid topographic growth of the Taiwan orogen since\~ 1.3--1.5 Ma, Science Advances, vol. 9, iss. 25, eade6415, American Association for the Advancement of Science
Research Type: Journal Article
Contextualizing Early Oligocene Fluvial Strata with Hydraulic and Catchment Properties of Contemporary Great Plains Streams
Michael Hren,
, (2023). Contextualizing Early Oligocene Fluvial Strata with Hydraulic and Catchment Properties of Contemporary Great Plains Streams, AGU23, AGU
Research Type: Journal Article
Michael Hren
, (2022). BULK CARBON ISOTOPIC VARIABILITY WITHIN LEAVES, Palaios
Research Type: Journal Article
A multivariate approach to polycyclic aromatic hydrocarbon source apportionment in Connecticut, USA using compound-specific isotopic compositions
Michael Hren,
, (2022). A multivariate approach to polycyclic aromatic hydrocarbon source apportionment in Connecticut, USA using compound-specific isotopic compositions, Environmental Earth Sciences, vol. 81, iss. 6, Springer Science and Business Media LLC
Research Type: Journal Article
Bulk Carbon Isotopic Variability Within Leaves
Michael Hren,
, (2022). Bulk Carbon Isotopic Variability Within Leaves, Palaios, vol. 37, iss. 8, pp. 411--417, Society for Sedimentary Geology
Research Type: Journal Article
Freeze tolerance influenced forest cover and hydrology during the Pennsylvanian
Michael Hren,
, (2021). Freeze tolerance influenced forest cover and hydrology during the Pennsylvanian, Proceedings of the National Academy of Sciences, vol. 118, iss. 42, Proceedings of the National Academy of Sciences
Research Type: Journal Article
Accelerated mass extinction in an isolated biota during Late Devonian climate changes
Michael Hren
, (2021). Accelerated mass extinction in an isolated biota during Late Devonian climate changes, Scientific Reports, vol. 11, pp. 24366
Research Type: Journal Article
Michael Hren
, (2021). Stable isotope records of nursing and weaning: A case study in elephants with implications for paleobiological investigations, Palaeogeography, Palaeoclimatology, Palaeoecology
Research Type: Journal Article
A biomarker stable isotope record of late Quaternary climate change in Southwestern Taiwan
Michael Hren,
, (2021). A biomarker stable isotope record of late Quaternary climate change in Southwestern Taiwan, American Journal of Science
Research Type: Journal Article
Michael Hren
, (2021). Profiling interactions between the Westerlies and Asian summer monsoons since 45 ka: Insights from biomarker, isotope, and numerical modeling studies in the Qaidam Basin, Bulletin of the Geological Society of America
Research Type: Journal Article
Gradients of geochemical change in relic charcoal hearth soils, Northwestern Connecticut, USA
Michael Hren,
, (2021). Gradients of geochemical change in relic charcoal hearth soils, Northwestern Connecticut, USA, Catena, vol. 197, pp. 104991, CATENA
Research Type: Journal Article
Short-term occupations at high elevation during the Middle Paleolithic at Kalavan 2 (Republic of Armenia)
Michael Hren,
, (2021). Short-term occupations at high elevation during the Middle Paleolithic at Kalavan 2 (Republic of Armenia), PloS one, vol. 16, iss. 2, e0245700, Public Library of Science San Francisco, CA USA
Research Type: Journal Article
Organic Molecular Paleohypsometry: A New Approach to Quantifying Paleotopography and Paleorelief
Michael Hren
, (2021). Organic Molecular Paleohypsometry: A New Approach to Quantifying Paleotopography and Paleorelief, Frontiers in Earth Science, vol. 9, pp. 18-Jan, Frontiers Media SA
Research Type: Journal Article
Terrestrial biomarker isotope records of late Quaternary climate and source-to-sink sediment transport processes in southwestern Taiwan
Michael Hren,
Clay Tabor
, (2021). Terrestrial biomarker isotope records of late Quaternary climate and source-to-sink sediment transport processes in southwestern Taiwan, American Journal of Science, vol. 321, iss. 4, pp. 393-423, American Journal of Science (AJS)
Research Type: Journal Article
Michael Hren
, (2021). Short-Term occupations at high elevation during the Middle Paleolithic at Kalavan 2 (Republic of Armenia), PLoS ONE
Research Type: Journal Article
Barozh 12: Formation processes of a late Middle Paleolithic open-air site in western Armenia
Michael Hren,
, (2020). Barozh 12: Formation processes of a late Middle Paleolithic open-air site in western Armenia, Quaternary Science Reviews, vol. 236
Research Type: Journal Article
A process-based ecosystem model (Paleo-BGC) to simulate the dynamic response of Late Carboniferous plants to elevated O2 and aridification
Michael Hren,
, (2020). A process-based ecosystem model (Paleo-BGC) to simulate the dynamic response of Late Carboniferous plants to elevated O2 and aridification, American Journal of Science, vol. 320, iss. 7, pp. 547--598, American Journal of Science
Research Type: Journal Article
Profiling interactions between the Westerlies and Asian summer monsoons since 45 ka: Insights from biomarker, isotope, and numerical modeling studies in the Qaidam Basin
Michael Hren,
, (2020). Profiling interactions between the Westerlies and Asian summer monsoons since 45 ka: Insights from biomarker, isotope, and numerical modeling studies in the Qaidam Basin, GSA Bulletin
Research Type: Journal Article
Michael Hren
, (2020). Terrestrial microbialites provide constraints on the mesoproterozoic atmosphere, Depositional Record
Research Type: Journal Article
Michael Hren
, (2020). Vegetation and habitat change in Southern California through the middle miocene climatic optimum: Paleoenvironmental records from the Barstow Formation, Mojave Desert, USA, Bulletin of the Geological Society of America
Research Type: Journal Article
Carboniferous plant physiology breaks the mold
Michael Hren,
, (2020). Carboniferous plant physiology breaks the mold, New Phytologist
Research Type: Journal Article
Michael Hren
, (2020). A process-based ecosystem model (paleo-bgc) to simulate the dynamic response of late carboniferous plants to elevated O2and aridification, American Journal of Science
Research Type: Journal Article
Post-charring diagenetic alteration of archaeological lentils by bacterial degradation
Michael Hren,
Gideon Hartman,
, (2020). Post-charring diagenetic alteration of archaeological lentils by bacterial degradation, Journal of Archaeological Science, vol. 117
Research Type: Journal Article
Constraining the dynamic climatic boundary between the Westerlies and Asian monsoon since 45 ka with biomarker, isotope, and climatic modeling studies
Michael Hren,
, (2020). Constraining the dynamic climatic boundary between the Westerlies and Asian monsoon since 45 ka with biomarker, isotope, and climatic modeling studies, Geological Society of America Bulletin, Geological Society of America, 10.1130/B35751.1
Research Type: Journal Article
Geochemical Evidence for the Control of Fire by Middle Palaeolithic Hominins
Michael Hren,
Gideon Hartman
, (2019). Geochemical Evidence for the Control of Fire by Middle Palaeolithic Hominins, Scientific Reports, vol. 9, iss. 1
Research Type: Journal Article
Gideon Hartman
, (2019). Influence of the North Atlantic Oscillation on _D and _18O in meteoric water in the Armenian Highland, Journal of Hydrology, vol. 575, pp. 513-522, 10.1016/j.jhydrol.2019.05.064
Research Type: Journal Article
The effect of soil temperature seasonality on climate reconstructions from paleosols
Michael Hren,
, (2019). The effect of soil temperature seasonality on climate reconstructions from paleosols, American Journal of Science, vol. 319, iss. 7, pp. 549-581, American Journal of Science (AJS)
Research Type: Journal Article
Research Type: Journal Article
Michael Hren
, (2019). Microbial and Geochronologic Constraints on the Neogene Paleotopography of Northern Tibetan Plateau, Geophysical Research Letters
Research Type: Journal Article
Influence of the North Atlantic Oscillation on \deltaD and \delta18O in meteoric water in the Armenian Highland
Gideon Hartman,
Michael Hren,
, (2019). Influence of the North Atlantic Oscillation on \deltaD and \delta18O in meteoric water in the Armenian Highland, Journal of Hydrology, vol. 575, pp. 513--522, Elsevier
Research Type: Journal Article
Eocene to modern topographic evolution of an Andean retroarc foreland basin (35° S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models
Michael Hren,
, (2019). Eocene to modern topographic evolution of an Andean retroarc foreland basin (35° S) from stable isotope paleoaltimetry: implications for tectonic and geodynamic models, International Society for Animal Genetics
Research Type: Journal Article
Michael Hren
, (2019). Growth and steady state of the Patagonian Andes, American Journal of Science
Research Type: Journal Article
Corrigendum:Dynamic Carboniferous tropical forests: new views of plant function and potential for physiological forcing of climate
Michael Hren
, (2018). Corrigendum:Dynamic Carboniferous tropical forests: new views of plant function and potential for physiological forcing of climate, New Phytologist, vol. 215, New Phytologist
Research Type: Journal Article
[Ru II (tpy)(bpy) Cl]+-Catalyzed reduction of carbon dioxide. Mechanistic insights by carbon-13 kinetic isotope effects
Alfredo Angeles-Boza,
, (2018). [Ru II (tpy)(bpy) Cl]+-Catalyzed reduction of carbon dioxide. Mechanistic insights by carbon-13 kinetic isotope effects, Chemical Communications, vol. 54, iss. 61, pp. 8518--8521, Royal Society of Chemistry
Research Type: Journal Article
Michael Hren,
, (2018). Variation in Hydrogen Isotope Composition Among Salt Marsh Plant Organic Compounds Highlights Biochemical Mechanisms Controlling Biosynthetic Fractionation, Journal of Geophysical Research: Biogeosciences, vol. 123, iss. Issue 9, Blackwell Publishing Ltd, 10.1029/2018jg004403
Research Type: Journal Article
Formation of a Rain Shadow: O and H Stable Isotope Records in Authigenic Clays From the Siwalik Group in Eastern Bhutan
Michael Hren,
, (2018). Formation of a Rain Shadow: O and H Stable Isotope Records in Authigenic Clays From the Siwalik Group in Eastern Bhutan, Geology, Geophysics, Geosystems, AGU
Research Type: Journal Article
[RuII(tpy)(bpy)Cl]+-Catalyzed reduction of carbon dioxide. Mechanistic insights by carbon-13 kinetic isotope effects.
Alfredo Angeles-Boza,
Michael Hren
, (2018). [RuII(tpy)(bpy)Cl]+-Catalyzed reduction of carbon dioxide. Mechanistic insights by carbon-13 kinetic isotope effects., Chemical communications (Cambridge, England), vol. 54, iss. 61, pp. 8518-8521
Research Type: Journal Article
Reconstructing vapor pressure deficit from leaf wax lipid molecular distributions
Research Type: Journal Article
[Ru(tpy)(bpy)Cl]-Catalyzed reduction of carbon dioxide. Mechanistic insights by carbon-13 kinetic isotope effects
Research Type: Journal Article
Variation in hydrogen isotope composition among saltmarsh plant organic compounds highlights potential biochemical mechanisms controlling biosynthetic fractionation
Michael Hren
, (2018). Variation in hydrogen isotope composition among saltmarsh plant organic compounds highlights potential biochemical mechanisms controlling biosynthetic fractionation, Journal Geophysical Research Biogeosciences, pp. 16-Jan
Research Type: Journal Article
Dynamic Carboniferous tropical forests: new views of plant function and potential for physiological forcing of climate (vol 215, pg 1333, 2017)
Michael Hren,
, (2018). Dynamic Carboniferous tropical forests: new views of plant function and potential for physiological forcing of climate (vol 215, pg 1333, 2017), NEW PHYTOLOGIST, vol. 218, iss. 2, pp. 873--874, WILEY 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Research Type: Journal Article
Michael Hren
, (2018). [RuII(tpy)(bpy)Cl]+-Catalyzed reduction of carbon dioxide. Mechanistic insights by carbon-13 kinetic isotope effects, Chemical Communications
Research Type: Journal Article
Michael Hren
, (2017). Dynamic Carboniferous tropical forests: new views of plant function and potential for physiological forcing of climate, New Phytologist
Research Type: Journal Article
Michael Hren
, (2017). Soil n-alkane δD and glycerol dialkyl glycerol tetraether (GDGT) distributions along an altitudinal transect from southwest China: Evaluating organic molecular proxies for paleoclimate and paleoelevation, Organic Geochemistry
Research Type: Journal Article
CARBON ISOTOPIC FRACTIONATION BETWEEN WHOLE LEAVES AND CUTICLE
Michael Hren
, (2017). CARBON ISOTOPIC FRACTIONATION BETWEEN WHOLE LEAVES AND CUTICLE, vol. 32, pp. 199-205, Palaios, 10.2110/palo.2016.073
Research Type: Journal Article
CARBON ISOTOPIC FRACTIONATION BETWEEN WHOLE LEAVES AND CUTICLELEAF-CUTICLE ISOTOPIC FRACTIONATIOND. L. ROYER AND MT HREN
Michael Hren,
, (2017). CARBON ISOTOPIC FRACTIONATION BETWEEN WHOLE LEAVES AND CUTICLELEAF-CUTICLE ISOTOPIC FRACTIONATIOND. L. ROYER AND MT HREN, Palaios, vol. 32, iss. 4, pp. 199--205, GeoScienceWorld
Research Type: Journal Article
Stratigraphy and paleoenvironmental analysis of the Frasnian-Famennian (Upper Devonian) boundary interval in Tioga, north-central Pennsylvania
Michael Hren
, (2017). Stratigraphy and paleoenvironmental analysis of the Frasnian-Famennian (Upper Devonian) boundary interval in Tioga, north-central Pennsylvania, Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 478, pp. 67-79
Research Type: Journal Article
Hydrogen isotope and molecular alteration of n-alkanes during heating in open and closed systems
Michael Hren,
, (2017). Hydrogen isotope and molecular alteration of n-alkanes during heating in open and closed systems, Organic Geochemistry, vol. 112, pp. 47-58, Elsevier
Research Type: Journal Article
Michael Hren
, (2017). Carbon isotopic fractionation between whole leaves and cuticle, Palaios
Research Type: Journal Article
Microbial alteration of the hydrogen and carbon isotopic composition of ¬n-alkanes in sediments
Michael Hren,
Gideon Hartman
, (2017). Microbial alteration of the hydrogen and carbon isotopic composition of ¬n-alkanes in sediments, vol. 107, pp. 8-Jan, Organic Geochemistry
Research Type: Journal Article
Soil n-alkane \deltaD and glycerol dialkyl glycerol tetraether (GDGT) distributions along an altitudinal transect from southwest China: Evaluating organic molecular proxies for paleoclimate and paleoelevation
Michael Hren,
, (2017). Soil n-alkane \deltaD and glycerol dialkyl glycerol tetraether (GDGT) distributions along an altitudinal transect from southwest China: Evaluating organic molecular proxies for paleoclimate and paleoelevation, Organic Geochemistry, vol. 107, pp. 21--32, Pergamon
Research Type: Journal Article
The distribution of glycerol dialkyl glycerol tetraethers across an environmental gradient in Yunnan Province, China
Michael Hren,
, (2017). The distribution of glycerol dialkyl glycerol tetraethers across an environmental gradient in Yunnan Province, China, Organic Geochemistry
Research Type: Journal Article
Microbial alteration of the hydrogen and carbon isotopic composition of n-alkanes in sediments
Michael Hren,
Gideon Hartman,
, (2017). Microbial alteration of the hydrogen and carbon isotopic composition of n-alkanes in sediments, Organic Geochemistry, vol. 107, pp. 8-Jan
Research Type: Journal Article
Coupling of marine and continental oxygen isotope records during the Eocene-Oligocene transition
Michael Hren,
, (2016). Coupling of marine and continental oxygen isotope records during the Eocene-Oligocene transition, Geological Society of America Bulletin, vol. 128, iss. 4-Mar, pp. 502-510
Research Type: Journal Article
Michael Hren
, (2016). Temporal variations in the δD of leaf n-alkanes from four riparian plant species, Organic Geochemistry
Research Type: Journal Article
Temporal variations in the \deltaD of leaf n-alkanes from four riparian plant species
Michael Hren
, (2016). Temporal variations in the \deltaD of leaf n-alkanes from four riparian plant species, Organic Geochemistry, vol. 97, pp. 122--130, Pergamon
Research Type: Journal Article
Climate, p CO 2 and terrestrial carbon cycle linkages during late Palaeozoic glacial--interglacial cycles
Michael Hren,
, (2016). Climate, p CO 2 and terrestrial carbon cycle linkages during late Palaeozoic glacial--interglacial cycles, Nature Geoscience, vol. 9, iss. 11, pp. 824--828, Nature Publishing Group
Research Type: Journal Article
THE GEOSYNCLINAL THEORY
Michael Hren,
, (2016). THE GEOSYNCLINAL THEORY, Geological Society of America Bulletin, vol. 128, pp. 5--6, Geological Soc America
Research Type: Journal Article
Linked Shifts in Glacial-Interglacial CO2, Climate and Terrestrial Carbon Cycling During Earth’s Last Icehouse
Michael Hren,
, (2016). Linked Shifts in Glacial-Interglacial CO2, Climate and Terrestrial Carbon Cycling During Earth’s Last Icehouse, Nature Geoscience
Research Type: Journal Article
Michael Hren
, (2016). Climate, pCO2 and terrestrial carbon cycle linkages during late Palaeozoic glacial-interglacial cycles, Nature Geoscience, vol. 9, iss. 11, pp. 824-828, 10.1038/ngeo2822
Research Type: Journal Article
HOLOCENE ENVIRONMENTAL CHANGE AND HUMAN IMPACTS IN SOUTHERN NEW ENGLAND
Michael Hren,
, (2016). HOLOCENE ENVIRONMENTAL CHANGE AND HUMAN IMPACTS IN SOUTHERN NEW ENGLAND
Research Type: Journal Article
Temporal variations in the δD of leaf n-alkanes from four riparian plant species.
Michael Hren,
, (2016). Temporal variations in the δD of leaf n-alkanes from four riparian plant species., pp. 10.1016/j.orggeochem.2016.03.010, Organic Geochemistry
Research Type: Journal Article
Compositional and temperature effects of phosphoric acid fractionation on δ47 analysis and implications for discrepant calibrations
Michael Hren,
, (2015). Compositional and temperature effects of phosphoric acid fractionation on δ47 analysis and implications for discrepant calibrations, Chemical Geology, vol. 396, pp. 51-60
Research Type: Journal Article
Compositional and temperature effects of phosphoric acid fractionation on \Delta47 analysis and implications for discrepant calibrations
Michael Hren
, (2015). Compositional and temperature effects of phosphoric acid fractionation on \Delta47 analysis and implications for discrepant calibrations, Chemical Geology, vol. 396, pp. 51--60, Elsevier
Research Type: Journal Article
Positive feedback drives carbon release from soils to atmosphere during Paleocene/Eocene warming
Michael Hren
, (2015). Positive feedback drives carbon release from soils to atmosphere during Paleocene/Eocene warming, American Journal of Science, vol. 315, iss. 4, pp. 337-361
Research Type: Journal Article
Rapid change in western North American high-elevation rainfall patterns during the Middle Eocene Climatic Optimum (MECO)
Michael Hren,
, (2015). Rapid change in western North American high-elevation rainfall patterns during the Middle Eocene Climatic Optimum (MECO), vol. 315, iss. doi: 10.2475/04.2015.03, pp. 317-336, American Journal of Science
Research Type: Journal Article
Michael Hren
, (2015). Rapid change in high-elevation precipitation patterns of Western North America during the Middle Eocene Climatic Optimum (MECO), American Journal of Science
Research Type: Journal Article
Compositional and temperature effects of phosphoric acid fractionation on _47 analysis and implications for discrepant calibrations.
Michael Hren
, (2015). Compositional and temperature effects of phosphoric acid fractionation on _47 analysis and implications for discrepant calibrations., vol. 396, pp. 51-60, Chemical Geology
Research Type: Journal Article
Reconstructing Extinct Plant Water Use for Understanding Vegetation-Climate Feedbacks: Methods, Synthesis, and a Case Study Using the Paleozoic Era Medullosan “Seed Ferns”
Michael Hren,
, (2015). Reconstructing Extinct Plant Water Use for Understanding Vegetation-Climate Feedbacks: Methods, Synthesis, and a Case Study Using the Paleozoic Era Medullosan “Seed Ferns”, vol. 21, pp. 167-195, Paleontological Society
Research Type: Journal Article
Stable isotopes reveal high southeast Tibetan Plateau margin since the Paleogene
Michael Hren,
, (2014). Stable isotopes reveal high southeast Tibetan Plateau margin since the Paleogene, vol. 394, pp. 270-278, Earth & Planetary Science Letters
Research Type: Journal Article
Terrestrial cooling in Northern Europe during the Eocene-Oligocene transition
Michael Hren,
, (2013). Terrestrial cooling in Northern Europe during the Eocene-Oligocene transition, Proceedings of the National Academy of Science, vol. 110, iss. 19, pp. 7562-7567
Research Type: Journal Article
Distribution of glycerol dialkyl glycerol tetraethers in soils from two environ_ mental transects in the USA
Michael Hren
, (2013). Distribution of glycerol dialkyl glycerol tetraethers in soils from two environ_ mental transects in the USA, vol. 59, pp. 49-60, Organic Geochemistry
Research Type: Journal Article
Overexpressing the ZmDof1 gene in Populus does not improve growth and nitrogen assimilation under low-nitrogen conditions
Michael Hren,
, (2013). Overexpressing the ZmDof1 gene in Populus does not improve growth and nitrogen assimilation under low-nitrogen conditions, Plant Cell, Tissue and Organ Culture (PCTOC), vol. 113, iss. 1, pp. 51--61, Springer
Research Type: Journal Article
Terrestrial cooling in Northern Europe during the eocene-oligocene transition
Research Type: Journal Article
Paleoelevation estimates for the northern and central proto-Basin and Range from carbonate clumped isotope thermometry
Michael Hren
, (2013). Paleoelevation estimates for the northern and central proto-Basin and Range from carbonate clumped isotope thermometry, DOI: 10.1002/tect.20016, Tectonics
Research Type: Journal Article
Distribution of glycerol dialkyl glycerol tetraethers in soils from two environmental transects in the USA
Michael Hren,
, (2013). Distribution of glycerol dialkyl glycerol tetraethers in soils from two environmental transects in the USA, Organic Geochemistry, vol. 59, pp. 49--60, Pergamon
Research Type: Journal Article
Temporal variations in lake water temperature: Paleoenvironmental implications of lake carbonate \delta18O and temperature records
Michael Hren
, (2012). Temporal variations in lake water temperature: Paleoenvironmental implications of lake carbonate \delta18O and temperature records, Earth and Planetary Science Letters, vol. 337, pp. 77--84, Elsevier
Research Type: Journal Article
Overexpressing the ZmDof1 gene in Populus does not improve growth and nitrogen assimilation under low-nitrogen conditions. Plant Cell & Tissue Culture
Michael Hren
, (2012). Overexpressing the ZmDof1 gene in Populus does not improve growth and nitrogen assimilation under low-nitrogen conditions. Plant Cell & Tissue Culture, vol. 113, pp. 51-61, Plant Cell, Tissue and Organ Culture
Research Type: Journal Article
The Cenozoic climatic and topographic evolution of the western North American Cordillera
Research Type: Journal Article
Michael Hren
, (2012). The cenozoic climatic and topographic evolution of the western north American Cordillera, American Journal of Science
Research Type: Journal Article
Research Type: Journal Article
Variation in n-alkane \deltaD values from terrestrial plants at high latitude: Implications for paleoclimate reconstruction
Michael Hren
, (2011). Variation in n-alkane \deltaD values from terrestrial plants at high latitude: Implications for paleoclimate reconstruction, Organic Geochemistry, vol. 42, iss. 3, pp. 283--288, Pergamon
Research Type: Journal Article
Pedogenic carbonate carbon isotopic constraints on paleoprecipitation: Evolution of desert in the Pacific Northwest, USA, in response to topographic development of the Cascade Range
Michael Hren,
, (2010). Pedogenic carbonate carbon isotopic constraints on paleoprecipitation: Evolution of desert in the Pacific Northwest, USA, in response to topographic development of the Cascade Range, Chemical Geology, vol. 277, iss. 4-Mar, pp. 323--335, Elsevier
Research Type: Journal Article
Biomarker reconstruction of the early Eocene paleotopography and paleoclimate of the northern Sierra Nevada
Michael Hren,
, (2010). Biomarker reconstruction of the early Eocene paleotopography and paleoclimate of the northern Sierra Nevada, Geology, vol. 38, iss. 1, pp. 7--10, Geological Society of America
Research Type: Journal Article
Oxygen and hydrogen isotope evidence for a temperate climate 3.42 billion years ago
Research Type: Journal Article
Michael Hren
, (2009). δ18O and δD of streamwaters across the Himalaya and Tibetan Plateau: Implications for moisture sources and paleoelevation reconstructions, Earth and Planetary Science Letters
Research Type: Journal Article
Michael Hren
, (2009). Stable isotope food-web analysis and mercury biomagnification in polar bears (Ursus maritimus), Polar Research
Research Type: Journal Article
Compound-specific stable isotope reconstruction of the paleoelevation of the Western US
Research Type: Journal Article
\delta18O and \deltaD of streamwaters across the Himalaya and Tibetan Plateau: Implications for moisture sources and paleoelevation reconstructions
Michael Hren,
, (2009). \delta18O and \deltaD of streamwaters across the Himalaya and Tibetan Plateau: Implications for moisture sources and paleoelevation reconstructions, Earth and Planetary Science Letters, vol. 288, iss. 2-Jan, pp. 20--32, Elsevier
Research Type: Journal Article
Major ion chemistry of the Yarlung Tsangpo--Brahmaputra river: chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya
Michael Hren,
, (2007). Major ion chemistry of the Yarlung Tsangpo--Brahmaputra river: chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya, Geochimica et Cosmochimica Acta, vol. 71, iss. 12, pp. 2907--2935, Pergamon
Research Type: Journal Article
Michael Hren
, (2007). The relationship between tectonic uplift and chemical weathering rates in the Washington Cascades: Field measurements and model predictions, American Journal of Science
Research Type: Journal Article
Michael Hren
, (2007). Major ion chemistry of the Yarlung Tsangpo-Brahmaputra river: Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya>, Geochimica et Cosmochimica Acta
Research Type: Journal Article
The relationship between tectonic uplift and chemical weathering rates in the Washington Cascades: field measurements and model predictions
Michael Hren,
, (2007). The relationship between tectonic uplift and chemical weathering rates in the Washington Cascades: field measurements and model predictions, American Journal of Science, vol. 307, iss. 9, pp. 1041--1063, American Journal of Science
Research Type: Journal Article
Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya
Michael Hren,
, (2007). Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya, Geochimica et Cosmochimica Acta, vol. 71, iss. 15, A419
Research Type: Journal Article
Stable isotope and rare earth element evidence for recent ironstone pods within the Archean Barberton greenstone belt, South Africa
Michael Hren,
, (2006). Stable isotope and rare earth element evidence for recent ironstone pods within the Archean Barberton greenstone belt, South Africa, Geochimica et cosmochimica acta, vol. 70, iss. 6, pp. 1457--1470, Pergamon
Research Type: Journal Article
Stable isotopic evidence for a pre--late Miocene elevation gradient in the Great Plains--Rocky Mountain region, USA
Michael Hren,
, (2006). Stable isotopic evidence for a pre--late Miocene elevation gradient in the Great Plains--Rocky Mountain region, USA, Geological Society of America Special Papers, vol. 398, pp. 309--319, Geological Society of America
Research Type: Journal Article
Michael Hren
, (2006). Stable isotope and Rare Earth Element evidence for recent ironstone pods within the Archean Barberton greenstone belt, South Africa, Geochimica et Cosmochimica Acta
Research Type: Journal Article
Wet climatic episodes are known to have prevailed in the Egyptian Sahara several times during the late Quaternary, most recently during the Holocene 8000 yr ago. Earlier wet episodes have been recognized as having occurred during the past 300,000 yr and have been dated by U-series methods in speleothems and in lake travertines. We show here that the times of enhanced groundwater movement can also...
Michael Hren,
, (2004). Wet climatic episodes are known to have prevailed in the Egyptian Sahara several times during the late Quaternary, most recently during the Holocene 8000 yr ago. Earlier wet episodes have been recognized as having occurred during the past 300,000 yr and have been dated by U-series methods in speleothems and in lake travertines. We show here that the times of enhanced groundwater movement can also..., Quaternary Research, vol. 61, iss. 1, pp. 119--121
Research Type: Journal Article
U-Pb zircon constraints on the tectonic evolution of southeastern Tibet, Namche Barwa area
Michael Hren,
, (2004). U-Pb zircon constraints on the tectonic evolution of southeastern Tibet, Namche Barwa area, American Journal of Science, vol. 304, iss. 10, pp. 889--929, American Journal of Science
Research Type: Journal Article
Oxygen isotope records of goethite from ferricrete deposits indicate regionally varying Holocene climate change in the Rocky Mountain region, USA
Michael Hren,
, (2004). Oxygen isotope records of goethite from ferricrete deposits indicate regionally varying Holocene climate change in the Rocky Mountain region, USA, Quaternary Research, vol. 61, iss. 1, pp. 64--71, No longer published by Elsevier
Research Type: Journal Article
Spatial and temporal variation of Cenozoic surface elevation in the Great Basin and Sierra Nevada
Michael Hren,
, (2004). Spatial and temporal variation of Cenozoic surface elevation in the Great Basin and Sierra Nevada, American Journal of Science, vol. 304, iss. 10, pp. 862--888, American Journal of Science
Research Type: Journal Article
Michael Hren
, (2004). Oxygen isotope records of goethite from ferricrete deposits indicate regionally varying Holocene climate change in the Rocky Mountain region, U.S.A, Quaternary Research
Research Type: Journal Article
Osmium and helium isotopic evidence against the standard stratification model of Earth's mantle
Research Type: Journal Article
Michael Hren
, (2003). Are high 3He/4He ratios in oceanic basalts an indicator of deep-mantle plume components?, Earth and Planetary Science Letters
Research Type: Journal Article
Os isotopes, deep-rooted mantle plumes and the timing of inner core formation
Michael Hren,
, (2002). Os isotopes, deep-rooted mantle plumes and the timing of inner core formation, Meteoritics and Planetary Science Supplement, vol. 37, A98
Research Type: Journal Article
Re--Os isotopic evidence for long-lived heterogeneity and equilibration processes in the Earth's upper mantle
Michael Hren,
, (2002). Re--Os isotopic evidence for long-lived heterogeneity and equilibration processes in the Earth's upper mantle, Nature, vol. 419, iss. 6908, pp. 705--708, Nature Publishing Group
Research Type: Journal Article
Re-Os isotopic evidence for long-lived heterogeneity and equilibration processes in the Earth's upper mantle
Research Type: Journal Article
Research Type: Journal Article
A combined flood surface and geochemical analysis of metal fluxes in a historically mined region: a case study from the New World Mining District, Montana
Michael Hren,
, (2001). A combined flood surface and geochemical analysis of metal fluxes in a historically mined region: a case study from the New World Mining District, Montana, Environmental Geology, vol. 40, iss. 12-Nov, pp. 1334--1346, Springer-Verlag
Research Type: Journal Article