❝
My research interests include landforms on the Earth's surface that are sculpted by flowing water in the form of rivers and glaciers and by wind and windborne particles. My work seeks to understand the intrinsic feedbacks between landforms on the Earth's surface and the fluid flow above the surface which creates these self-organized patterns. I focus on computer modeling and on the integration of model results with field and remote-sensing data.Show Less
VOSviewer
Courses
- TBLThe Beauty of Landscapes
- NPAWTEGPNational Parks: A Window Through Earth's Geological Processes
- GLEGeomorphology and Landscape Evolution
- ANMGAnalytical and Numerical Modeling in Geosciences
- FSGField Studies in Geomorphology
- GGeomorphology
- GDSGeological Disasters and Society
- ESPEarth Surface Processes
Grants
- Monitoring And Assessment Of Closure Design Performance at BHP sites
Principal Investigator (PI)
2018
$1.2M
Active - Channel and Landscape Evolution as a Function of Spatial Scale in Semiarid Watersheds
Principal Investigator (PI)
2017
$130.0K
- Characterizing Global Sand Flux for Martian Bedform Construction Times and Erosion Rates
Co-Investigator (COI)
2015
$298.4K
- Quantifying Turbulent Shear Stress in "Real" Landscapes
Principal Investigator (PI)
2014
$50.0K
- UAZDS-417 Hydrological Impacts of Fires Fueled by Invasive Buffelgrass
Principal Investigator (PI)
2014
$33.1K
- Wind Over Rock: Quantifying the Feedbacks Among Wind Flow, Bedrock Erosion and Tectonic Uplift
Principal Investigator (PI)
2013
$328.6K
- Development of a High-Resolution Global Soil Depth Dataset
Principal Investigator (PI)
2013
$249.2K
- A workshop to assess and advance the prediction of land-surface response to climate and land use changes
Principal Investigator (PI)
2013
$29.9K
- Collaborative Research: WILSIM2, The Next Generation Landform Simulator
Principal Investigator (PI)
2012
$30.4K
- Collaborative Project: Development of Hybrid 3-D Hydrological Modeling for the NCAR Community Earth System Model (CESM)
Co-Investigator (COI)
2011
$761.7K
News
- Post-Wildfire Erosion Can Sculpt Forested Mountains
2016
- How Wind Sculpted the Earth’s Largest Dust Deposit
2015
- Video Highlights UA-Led Research on Human Evolution, Climate
2015
- UA Geoscientist Receives $4.78M to Study Links Between Human Evolution, Past Climate
2013
- Wind Can Keep Mountains From Growing
2011
- GeoDaze 2009 Features UA Student Research in the Earth Sciences
2009
- How Martian Winds Make Rocks Walk
2009
- UA Awarded $4.35M to Study Earth's Critical Zone
2009
- UA Team Evaluating Relationship Between Roadways, Restoration
2009
- Liquid Water Found Flowing on Mars? Not Yet
2008
- Biosphere 2 Hosts Fall Lecture Series
2008
- Predicting Where Flooding Will Occur in the West
2005
- Growth Secrets of Alaska's Mysterious Field of Lakes
2005
- Martian Mystery Explained
2004
Publications (165)
Recent
- How Hack distributions of rill networks contribute to nonlinear slope length--soil loss relationships
2020
- Controls on the hydraulic geometry of alluvial channels: bank stability to gravitational failure, the critical-flow hypothesis, and conservation of mass and energy
2020
- Resolving deep critical zone architecture in complex volcanic terrain
2020
- The Community Land Model version 5: Description of new features, benchmarking, and impact of forcing uncertainty
2019
- Hillslope hydrology in global change research and Earth system modeling
2019
- Earth surface modeling for education: How effective is it? Four semesters of classroom tests with WILSIM-GC
2019
- Controlled experiments of hillslope coevolution at the Biosphere 2 Landscape Evolution Observatory: Toward prediction of coupled hydrological, biogeochemical, and ecological change
2018
- A net ecosystem carbon budget for snow dominated forested headwater catchments: linking water and carbon fluxes to critical zone carbon storage
2018
- Why Do Large‐Scale Land Surface Models Produce a Low Ratio of Transpiration to Evapotranspiration?
2018
- Which way do you lean? Using slope aspect variations to understand Critical Zone processes and feedbacks
2018
- Why do large-scale land surface models produce a low ratio of transpiration to evapotranspiration?
2018
- Controls on yardang development and morphology: 2. Numerical modeling
2018
- Signatures of obliquity and eccentricity in soil chronosequences
2018
- Controls on yardang development and morphology: 1. Field observations and measurements at Ocotillo Wells, California
2018
- A probabilistic approach to quantifying soil property change through time integration of energy and mass input
2017
- The Hominin Sites and Paleolakes Drilling Project: High-resolution paleoclimate records from the East African Rift System and their implications for understanding the environmental context of hominin evolution
2017
- A probabilistic approach to quantifying soil physical properties via time-integrated energy and mass input
2017
- Asymmetry of weathering-limited hillslopes: the importance of diurnal covariation in solar insolation and temperature
2017
- Coevolution of soil and topography across a semiarid cinder cone chronosequence
2017
- Geochemical evolution of the Critical Zone across variable time scales informs concentration-discharge relationships: Jemez River Basin Critical Zone Observatory
2017
- The Hominin Sites and Paleolakes Drilling Project: Acquiring High-Resolution Paleoclimate Records from the East African Rift System and Their Implications for Understanding the Environmental Context of Hominin Evolution
2017
- Quantifying the controls on potential soil production rates: a case study of the San Gabriel Mountains, California
2017
- Quantifying geomorphic change at ephemeral stream restoration sites using a coupled-model approach
2017
- CO2 diffusion into pore spaces limits weathering rate of an experimental basalt landscape
2017
- Topographic correlations with soil and regolith thickness from shallow-seismic refraction constraints across upland hillslopes in the Valles Caldera, New Mexico
2016
- A gridded global data set of soil, intact regolith, and sedimentary deposit thicknesses for regional and global land surface modeling
2016
- Understanding ecosystem services from a geosciences perspective
2016
- Advantages of computer simulation in enhancing students' learning about landform evolution: A case study using the grand canyon
2016
- Colloids and organic matter complexation control trace metal concentration-discharge relationships in Marshall Gulch stream waters
2016
- Constraining frequency--magnitude--area relationships for rainfall and flood discharges using radar-derived precipitation estimates: example applications in the Upper and Lower Colorado River basins, USA
2016
- Implementing and evaluating variable soil thickness in the Community Land Model, version 4.5 (CLM4. 5)
2016
- The predominance of post-wildfire erosion in the long-term denudation of the Valles Caldera, New Mexico
2016
- The influence of Holocene vegetation changes on topography and erosion rates: A case study at Walnut Gulch Experimental Watershed, Arizona
2016
- Self-affinity and surface-area-dependent fluctuations of lake-level time series
2015
- A gridded global data set of soil, immobile regolith, and sedimentary deposit thicknesses for regional and global land surface modeling
2015
- Geomorphic imprints of repeated tsunami waves in a coastal valley in northeastern Japan
2015
- Dynamics of sediment storage and release on aeolian dune slip faces: A field study in Jericoacoara, Brazil
2015
- Critical zone services: Expanding context, constraints, and curency beyond ecosystem services.
2015
- Forecasting the response of Earth's surface to future climatic and land use changes: A review of methods and research needs
2015
- Controls on the large-scale spatial variations of dune field properties in the barchanoid portion of White Sands dune field, New Mexico
2015
- Predicting the roughness length of turbulent flows over landscapes with multi-scale microtopography
2015
- Laser vision: lidar as a transformative tool to advance critical zone science
2015
- Controls on valley spacing in landscapes subject to rapid base-level fall
2015
- Quantifying the time scale of elevated geomorphic response following wildfires using multi-temporal LiDAR data: An example from the Las Conchas fire, Jemez Mountains, New Mexico
2015
- Decadal-scale soil redistribution along hillslopes in the Mojave Desert
2015
- A hybrid-3D hillslope hydrological model for use in E arth system models
2015
- Constraining frequency-magnitude-area relationships for precipitation and flood discharges using radar-derived precipitation estimates: example applications in the Upper and Lower Colorado River Basins, USA.
2015
- The Landscape Evolution Observatory: A large-scale controllable infrastructure to study coupled Earth-surface processes
2015
- Quantifying topographic and vegetation effects on the transfer of energy and mass to the critical zone
2015
- An effective hyper-resolution pseudo-3D implementation of small scale hydrological features to improve regional and global climate studies
2014
- Multiscale bed form interactions and their implications for the abruptness and stability of the downwind dune field margin at White Sands, New Mexico, USA
2014
- FROM DUST TO DUST: QUATERNARY WIND EROSION OF THE MU US DESERT AND LOESS PLATEAU, CHINA
2014
- Controls on slope-wash erosion rates in the Mojave Desert
2014
- Martian Polar Stratigraphy from Stereo Topography
2014
- Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services
2014
- The linkages among hillslope-vegetation changes, elevation, and the timing of late-Quaternary fluvial-system aggradation in the Mojave Desert revisited
2014
- Polar Stratigraphy from HiRISE Stereo Topography
2014
- Hillslope-scale experiment demonstrates the role of convergence during two-step saturation
2014
- Development of topographic asymmetry: Insights from dated cinder cones in the western United States
2014
- Simulating foreland basin response to mountain belt kinematics and climate change in the Eastern Cordillera and Subandes: An analysis of the Chaco foreland basin in southern Bolivia
2014
- An integrated modelling framework of catchment-scale ecohydrological processes: 2. The role of water subsidy by overland flow on vegetation dynamics in a semi-arid catchment
2014
- Incipient subsurface heterogeneity and its effect on overland flow generation--insight from a modeling study of the first experiment at the Biosphere 2 Landscape Evolution Observatory
2014
- Rare earth elements as reactive tracers of biogeochemical weathering in forested rhyolitic terrain
2014
- Controls on the geometry of potholes in bedrock channels
2014
- How do sediment yields from post-wildfire debris-laden flows depend on terrain slope, soil burn severity class, and drainage basin area? Insights from airborne-LiDAR change detection
2014
- Assessing Ability to Forecast Geomorphic System Responses to Climate and Land-Use Changes
2014
- Controls on the spacing and geometry of rill networks on hillslopes: Rain splash detachment, initial hillslope roughness, and the competition between fluvial and colluvial transport
2013
- Relationships between debris fan morphology and flow rheology for wet and dry flows on Earth and Mars: A numerical modeling investigation
2013
- Cosmogenic sup 3 /sup He age estimates of Plio-Pleistocene alluvial-fan surfaces in the Lower Colorado River Corridor, Arizona, USA
2013
- Coevolution of nonlinear trends in vegetation, soils, and topography with elevation and slope aspect: A case study in the sky islands of southern Arizona
2013
- A robust, two-parameter method for the extraction of drainage networks from high-resolution digital elevation models (DEMs): Evaluation using synthetic and real-world DEMs
2013
- Autogenic cycles of channelized fluvial and sheet flow and their potential role in driving long-runout gravel progradation in sedimentary basins
2013
- Predicting the thickness and aeolian fraction of soils in upland watersheds of the Mojave Desert
2013
- Deviations from self-similarity in barchan form and flux: The case of the Salton Sea dunes, California
2013
- A spatially distributed model for the long-term suspended sediment discharge and delivery ratio of drainage basins
2012
- How do vegetation bands form in dry lands? Insights from numerical modeling and field studies in southern Nevada, USA
2012
- Analytic solution for the morphology of a soil-mantled valley undergoing steady headward growth: Validation using case studies in southeastern Arizona
2012
- Fluvial and slope-wash erosion of soil-mantled landscapes: detachment-or transport-limited?
2012
- Wind erosion in the Qaidam basin, central Asia: implications for tectonics, paleoclimate, and the source of the Loess Plateau
2011
- How water, carbon, and energy drive critical zone evolution: the Jemez-Santa Catalina Critical Zone Observatory
2011
- Calibration and testing of upland hillslope evolution models in a dated landscape: Banco Bonito, New Mexico
2011
- Late Holocene alluvial history of the Cuyama River, California, USA
2011
- An open system framework for integrating critical zone structure and function
2011
- Widespread hillslope gullying on the southeastern Tibetan Plateau: Human or climate-change induced?
2011
- The role of weathering in the formation of bedrock valleys on Earth and Mars: A numerical modeling investigation
2011
- Investigating gully flow emplacement mechanisms using apex slopes
2010
- How do pediments form?: A numerical modeling investigation with comparison to pediments in southern Arizona, USA
2010
- Numerical modeling of the late Cenozoic geomorphic evolution of Grand Canyon, Arizona
2010
- Modeling the formation of bright slope deposits associated with gullies in Hale Crater, Mars: Implications for recent liquid water
2010
- Controls of glacial valley spacing on earth and mars
2010
- Erratum to Controls of glacial valley spacing on Earth and Mars (Geomorphology 116 (2010) 189-201) (DOI:10.1016/j.geomorph.2009.10.018)
2010
- Relationships among climate, erosion, topography, and delamination in the Andes: A numerical modeling investigation
2010
- Minimizing the grid-resolution dependence of flow-routing algorithms for geomorphic applications
2010
- The effects of interdune vegetation changes on eolian dune field evolution: a numerical-modeling case study at Jockey's Ridge, North Carolina, USA
2009
- Quantifying the climatic and tectonic controls on hillslope steepness and erosion rate
2009
- An analysis of sinuous ridges in the southern Argyre Planitia, Mars using HiRISE and CTX images and MOLA data
2009
- Geomorphically based predictive mapping of soil thickness in upland watersheds
2009
- Wind-driven reorganization of coarse clasts on the surface of Mars
2009
- The hills are alive: Earth science in a controlled environment
2009
- Welcome to Lithosphere
2009
- Controls on the height and spacing of eolian ripples and transverse dunes: A numerical modeling investigation
2009
- Tectonic and structural control of fluvial channel morphology in metamorphic core complexes: The example of the Catalina-Rincon core complex, Arizona
2009
- The impact of snowmelt on the late Cenozoic landscape of the southern Rocky Mountains, USA
2009
- Geomorphology, complexity, and the emerging science of the Earth's surface
2009
- High Resolution Imaging Science Experiment (HiRISE) observations of glacial and periglacial morphologies in the circum-Argyre Planitia highlands, Mars
2008
- Crack propagation by differential insolation on desert surface clasts
2008
- Forward modeling of ice topography on Mars to infer basal shear stress conditions
2008
- Glacial erosion and mountain building
2008
- Evaluating suitability of a tephra dispersal model as part of a risk assessment framework
2008
- Quantitative modeling of earth surface processes
2008
- Recent bright gully deposits on Mars: Wet or dry flow?
2008
- Infiltration on alluvial fans in arid environments: Influence of fan morphology
2008
- Climate change triggered sedimentation and progressive tectonic uplift in a coupled piedmont--axial system: Cuyama Valley, California, USA
2008
- Dispersion of channel-sediment contaminants in distributary fluvial systems: Application to fluvial tephra and radionuclide redistribution following a potential volcanic eruption at Yucca Mountain
2008
- Desert pavement dynamics: numerical modeling and field-based calibration
2007
- Nonlinear slope-dependent sediment transport in cinder cone evolution
2007
- Relief threshold for eolian sand transport on alluvial fans
2007
- Erosion-rate determination from foreland basin geometry
2007
- Fractal behavior in space and time in a simplified model of fluvial landform evolution
2007
- Bedrock landscape development modeling: Calibration using field study, geochronology, and digital elevation model analysis
2007
- Cantor set model of eolian dust deposits on desert alluvial fan terraces
2007
- Numerical modeling of the Cenozoic geomorphic evolution of the southern Sierra Nevada, California
2007
- Evolution of the Bonneville shoreline scarp in west-central Utah: Comparison of scarp-analysis methods and implications for the diffusion model of hillslope evolution
2006
- Reply to comment by Kenneth Hinkel on Formation of oriented thaw lakes by thaw slumping
2006
- Latitudinal variation of denudation in the evolution of the Bolivian Andes
2006
- Sensitivity of playa windblown-dust emissions to climatic and anthropogenic change
2006
- Eocene to recent variations in erosion across the central Andean fold-thrust belt, northern Bolivia: Implications for plateau evolution
2006
- Formation of oriented thaw lakes by thaw slumping
2005
- Linking the scales of observation, process, and modeling of dust emissions
2005
- Deposition of playa windblown dust over geologic time scales
2005
- An integrated approach to flood hazard assessment on alluvial fans using numerical modeling, field mapping, and remote sensing
2005
- Mountains, monsoons, and megafans
2005
- Geomorphic control of radionuclide diffusion in desert soils
2005
- Correlation and dating of Quaternary alluvial-fan surfaces using scarp diffusion
2004
- Persistent drainage migration in a numerical landscape evolution model
2004
- Estimate of three-dimensional flexural-isostatic response to unloading: Rock uplift due to late Cenozoic glacial erosion in the western United States
2004
- The influence of piedmont deposition on the time scale of mountain-belt denudation
2004
- How do spiral troughs form on Mars?
2004
- Oscillations in arid alluvial-channel geometry
2004
- Coherence resonance and ice ages
2003
- Drainage basin evolution in the Rainfall Erosion Facility: dependence on initial conditions
2003
- Natural variability of atmospheric temperatures and geomagnetic intensity over a wide range of time scales
2002
- Spring-block models of seismicity: Review and analysis of a structurally heterogeneous model coupled to a viscous asthenosphere
2000
- Shapes of river networks and leaves: are they statistically similar?
2000
- Model assessments of the optimal design of nature reserves for maximizing species longevity
2000
- Are large complex ecosystems more unstable? A theoretical reassessment with predator switching
2000
- Statistical self-similarity of magmatism and volcanism
1999
- Species-Area Relation and Self-Similarity in a Biogeographical Model of Speciation and Extinction
1999
- Self-organization and scaling relationships of evolving river networks
1999
- Application of a Stochastic Deposition and Erosion Model to Reservoir Heterogeneity and Stratigraphic Data
1999
- Preface
1999
- Self-Affine Time Series: II. Applications and Models
1999
- Paleointensity variations of Earth's magnetic field and their relationship with polarity reversals
1999
- Networks with side branching in biology
1998
- The power spectral density of atmospheric temperature from time scales of 10- 2 to 106 yr
1998
- The power spectral density of atmospheric temperature from time scales of 10 sup -2 /sup to 10 sup 6 /sup yr
1998
- Kardar-Parisi-Zhang scaling of the height of the convective boundary layer and fractal structure of cumulus cloud fields
1997
- Synthetic stratigraphy with a stochastic diffusion model of fluvial sedimentation
1997
- Long-range persistence in climatological and hydrological time series: analysis, modeling and application to drought hazard assessment
1997
- Scale-invariance of soil moisture variability and its implications for the frequency-size distribution of landslides
1997
- Fractal models in Geology
1997
- Analysis and modeling of the natural variability of climate
1997
- Variations in solar luminosity from timescales of minutes to months
1996
- Scale-invariant topography and porosity variations in fluvial sedimentary basins
1996
- Molecular dynamics simulations of low-energy cluster deposition on metallic targets
1992