People


Andrew Richardson (Google Scholar)

Professor, Center for Ecosystem Science and Society (Ecoss)
Professor, School of Informatics, Computing & Cyber Systems (SICCS)

PhD (2003) Yale University, Forestry & Environmental Studies
AB (1992) Princeton University, Economics

Email: andrew.richardson@nau.edu
Telephone: 928 523 3049

Research interests: Terrestrial ecosystems and global change; Forest ecology; Biosphere-atmosphere interactions and feedbacks; Carbon allocation in plants; Phenology; Model-data fusion.

Jen Diel photo
Jen Diehl

PhD Student

BS (2019) University of Vermont, Environmental Sciences & Geospatial Technology

Email: jld664@nau.edu

Research interests: Remote sensing; Ecological modeling; Conservation biology; Forest ecology


Jim LeMoine (Google Scholar)

Lab Manager

MS (2005) University of Toledo
BS (2001) Michigan Technological University

Email: jim.le.moine@nau.edu
Telephone: 928 523 0732

Research interests: Biogeochemistry–specifically C, N, and Hg; Forest Ecology and Management; Soil Organic Matter Formation; Phenology


Alison Post

Postdoctoral Research Associate

PhD (2021) Colorado State University, Ecology
BS (2014) University of Maryland, Biology

Email: alison.post@nau.edu
Telephone: 928 523 1263

Research interests: Climate Change; Grasslands; Precipitation Extremes; Phenology; Ecosystem Modeling


Christina Schädel 
(Research Gate; Google scholar)

Assistant Research Professor

PhD (2009) University of Basel, Switzerland
MS (2005) University of Basel, Switzerland and University of Vienna, Austria
BS (2004) University of Basel, Switzerland

Email: christina.schaedel@nau.edu

Research interests: Global carbon cycle; Data synthesis; Meta-analysis; Permafrost carbon; and Climate change experiments


Aaron Teets

PhD Student

MS (2018) University of Maine, Forest Resources
BS (2008) Virginia Tech, Biological Sciences

Email: aft49@nau.edu

Research interests: Forest carbon dynamics; Phenology; Woody biomass increment; Non-structural carbohydrates; Eddy-covariance


Samantha Watson

PhD Student

MS (2021) California State University Los Angeles, Biology
MEd (2016) National University, Education
BS (2010) California State University Los Angeles, Biology

Email: sjw425@nau.edu

Research interests: Climate change; Forest ecology; Phenology; Land-atmosphere interactions; Data synthesis and statistical modeling


Natasha Wesely
PhD Student

BS (2019) University of Nevada, Reno, Environmental Science
BS (2019) University of Nevada, Reno, Education

Email: nkw54@nau.edu
ORCID:  0000-0001-7469-3258

Research interests: Ecosystem modeling; terrestrial carbon cycling; forest ecology; abiotic drivers of vegetation dynamics

Special Guests

woman in yellow-green shirt and grey baseball cap smiling at camera with mountain in background
Raquel Alfaro Sanchez

Visiting Postdoctoral Researcher May 2022

Postdoctoral Researcher (2020 to Present) Wilfrid Laurier University
PhD (2014) Agricultural Sciences, University of Castilla La Mancha, Spain
BS (2009) University of Murcia, Spain, Environmental Sciences

Research interests: Post-fire regeneration, Forest ecology, Dendroecology, Climate change

photograph of Don Aubrecht
Don Aubrecht (LinkedIn)

Affiliated Research Scientist (2017 to Present)

PhD (2013) Harvard University, Applied Physics
SM (2008) Harvard University, Applied Physics
BS (2006) Cornell University, Engineering Physics

Email: don.aubrecht@gmail.com

Research interests: Vegetation dynamics; Remote Sensing; Process-based modeling;  Sensor development for eco-physiological measurements

photo of david basler
David Basler (Research Gate; Google Scholar)

Affiliated Research Scientist (2017 to Present)

PhD (2014) University of Basel, Botany
MS (2008) University of Basel, Ecology
BS (2006) University of Basel, Biology

Email:  david.j.basler@gmail.com

Research interests: Vegetation dynamics; Carbon/Water cycling; Remote Sensing; Process-based modeling;  Sensor development for eco-physiological measurements

Koen Hufkens

Affiliated Research Scientist (2017 to Present)

Visiting from Ghent University (October to December 2018, 2019)
PhD  (2009) University of Antwerp

Email: koen.hufkens@gmail.com

Research interests: modelingmodel ecosystem processes, such as vegetation growth or drought / disturbance resistance, using various -retrospective- proxy measurements in a model data fusion approach, including among others remote sensing, dendrochronology and recovered historical data records


Tom Milliman

Affiliated Research Scientist

Visiting from University of New Hampshire (September to December 2021)
Email: Thomas.Milliman@unh.edu

Research interests: Tom manages the data and website for the PhenoCam network and collaborates on phenology manuscripts.


Fateme Yousefi Lalimi

Postdoctoral Researcher (2018 to 2021)

Visiting from Arizona State University
PhD (2018) Duke University

Email: f.yousefi@asu.edu

Research interests: Coastal morphodynamics; Barrier systems; Estuarine and nearshore processes; Sediment transport; process based modeling and remote sensing of coastal processes


Kevin Bórnez Mejías

Predoctoral Researcher (September to December 2018)

Visiting from Universitat Autònoma de Barcelona
MS  (2013) Universidad de Castilla-La Mancha
MS (2014) Universidad de Málaga (2014)

Email: k.bornez@creaf.uab.cat

Research interests: optimizing algorithms to estimate vegetative phenology  from satellites; response of the vegetation to climate change and feedbacks among plant phenophases on the global climate

NAU Alumni


Eric Beamesderfer
(Google Scholar)

Postdoctoral Research Associate 2019 to 2022: Eric Beamesderfer conducted a ceilometer model comparison, studied atmospheric mixing layer heights with radiosonde and ceilometer measurements, and examined relations among environmental conditions, mixing layer heights, and ecosystem fluxes. He worked for the Washington State government after leaving NAU .

PhD (2020) McMaster University, Earth & Environmental Sciences
MS (2015) University of Wyoming, Atmospheric Sciences
BS (2012) California University of Pennsylvania, Meteorology

Email: eric.beamesderfer@nau.edu

Research interests: Forest-atmosphere interactions; Boundary-layer meteorology; Phenology; Eddy covariance.


Katharyn Duffy

Postdoctoral Research Associate 2018 to 2020: Kate Duffy developed the Phenosynth tool while in the lab. She continued supporting the SICCS T3 graduate program at NAU after her time in the lab.

PhD (2018) Northern Arizona University,
Earth Sciences & Environmental Sustainability
MS (2012) Northern Arizona University, Climate Science & Solutions
BS (2011) Portland State University, Geology

Email: katharyn.duffy@nau.edu

Research interests: terrestrial biosphere-Earth system interactions; Climatic change effects on phenology and land-atmosphere carbon exchange


Shawna Greyeyes

National Science Foundation Research Experience for Undergraduates 2019 and Laboratory Assistant 2020. Shawna worked with mentor Tim Rademacher on the Twittering tree project. She subsequently pursued a career in nursing.
BS (2022) Northern Arizona University, Nursing
Email: shawna99g@gmail.com


Gary Kong

National Science Foundation Research Experience for Undergraduates 2021. Gary worked on a project measuring methane and carbon dioxide and spectral reflectance from biological soil crusts.

BS (2023) University of California Santa Barbara, Biology
Email: garyvincentkong111@gmail.com


Elise Miller

National Science Foundation Research Experience for Undergraduates 2019: Elise continued working on her REU project for he senior thesis and submitted it for publication with her mentor Tim Rademacher. She continued her graduate studies at the University of Minnesota-Duluth after her time in the lab.

BS (2020) College of St. Benedict, Biology

Email: E1Miller@csbsju.edu


Amberlee Pavey

Undergraduate Student Worker

Autumn 2018: Amberlee processed leaf samples and helped build a training dataset to identify cloudy, hazy, and snowy PhenoCam images. She continued her studies in Forensic Science after her tenure in the lab.

Email: ap2728@nau.edu


Tim Rademacher (Google Scholar)

Postdoctoral Research Associate 2017 to 2021 worked on phloem flow manipulation experiments to better understand the relationships between nonstructural carbohydrates and growth in plants.

PhD (2016) University of Cambridge
BA   (2012) University of Cambridge

Email: tim.rademacher@nau.edu

Research Interests: Eco-physiology of terrestrial vegetation


Gabby Sequeira

Undergraduate Student Worker

BS (2022) Northern Arizona University, Environmental Studies

Spring 2019: Gabby processed wood samples for and helped with non structural carbohydrate analyses. She continued at NAU after her tenure in the lab.

Email: gls228@nau.edu


Bijan Seyednasrollah (Home page; Google scholar)

Postdoctoral Research Associate (2017–2020)

PhD (2017) Duke University, Environment
MS (2006) Sharif University Technology, Mechanical Engineering
BS (2003) University of Semnan, Mechanical Engineering

Email: bijan.seyednasrollah@nau.edu

Research interests: Global environmental change; Environmental data science, Hierarchical Bayesian statistics; Process- and physics-based modeling of land-atmosphere interactions; Energy transfer of terrestrial ecosystems; Eco-hydrology

Kevyn Sisante

Undergraduate Student Worker

BS (2020) Northern Arizona University, Computer Science

Fall 2018 to Spring 2019: Kevyn processed leaf samples and helped build a training dataset to identify cloudy, hazy, and snowy PhenoCam images. He also worked on code to automate snow detection. He continued his computer science studies at NAU after his tenure in the lab.

Email: kps243@nau.edu


Kat Taylor

National Science Foundation Research Experience for Undergraduates 2021. Kat worked on a project measuring methane and carbon dioxide and spectral reflectance from biological soil crusts.

BS (2024) Penn State University
Email: Kmt5918@psu.edu


Angelina Valenzuela

Undergraduate Student Worker

BS (2022) Northern Arizona University, Environmental Studies

Spring 2019: Angie processed wood samples for and helped with non structural carbohydrate analyses. She continued at NAU after her tenure in the lab.

Email: abv46@nau.edu


Adam Young

Postdoctoral Research Associate

PhD (2018) University of Idaho

Email: adam.young@nau.edu

Adam modeled phenological effects on ecosystem energy balance and water fluxes before moving to a research scientist position at the University of Alaska Fairbanks in November 2021.