Submissions from 2026
Spatiotemporal mapping of invasive yellow sweetclover blooms using Sentinel-2 and high-resolution drone imagery, Sakshi Saraf, Ranjeet John, Venkatesh Kolluru, Khushboo Jain, Geoffrey M. Henebry, Jiquan Chen, and Raffaele Lafortezza
Submissions from 2025
Inherited Futures: Generation Z and Their Parents on the Future and Sustainability, Joseph Kantenbacher and Sonja Braucht
Food Systems in the Curriculum of American Undergraduate Sustainability and Environmental Science/Studies Programs, Joseph Kantenbacher, Ethan Strom, Vivian Omondi, Sharad Chowdhury, and Sonja Braucht
Identifying opportunities for nature-based solutions with geospatialized life cycle assessments and fine-scale socioecological data, Gabriela Shirkey, Annick Anctil, Ranjeet John, Leah Mungai, Herve Kashongwe, Lauren T. Cooper, Ilke Celik, Joshua B. Fisher, and Jiquan Chen
Submissions from 2024
Dust in the Critical Zone: North American case studies, J. Brahney, R. C. Heindel, T. E. Gill, G. Carling, J. M. González-Olalla, J. Hand, D. V. Mallia, J. S. Munroe, K. Perry, A. L. Putman, S. M. Skiles, B. R. Adams, Z. Aanderud, S. Aarons, D. Aguirre, K. Ardon-Dryer, M. B. Blakowski, J. M. Creamean, D. Fernandez, H. Foroutan, C. Gaston, M. Hahnenberger, S. Hoch, D. K. Jones, K. E. Kelly, O. I. Lang, J. LeMonte, R. Reynolds, R. P. Singh, M. Sweeney, and T. Merrill
Natural assets, changes, and variations of the socioeconomic-environmental systems along the Asian drylands belt, Jiquan Chen, Ranjeet John, Venkatesh Kolluru, Elizabeth A. Mack, Peilei Fan, Jing Yuan, Zutao Ouyang, Jingyan Chen, Pavel Groisman, Changliang Shao, Amarjargal Amartuvshin, and Garik Gutman
Embracing these bare November days (inspired by Robert Frost), Charles B. Fenster and Meghann Jarchow
Alignment among environmental programs in higher education: What Food-Energy-Water Nexus concepts are covered in introductory courses?, Lydia Horne, Amanda Manzanares, Nicholas Babin, Emily A. Royse, Lee Arakawa, Eunice Blavascunas, Lisa Doner, Daniel Druckenbrod, Ennea Fairchild, Meghann Jarchow, Barry R. Muchnick, Prajjwa Panday, Denielle Perry, Rebecca Thomas, Anne Toomey, Brian H. Tucker, Camille Washington-Ottombre, Shirley Vincent, Steven W. Anderson, and Chelsie Romulo
Monitoring the Spatial Distribution of Cover Crops and Tillage Practices Using Machine Learning and Environmental Drivers across Eastern South Dakota, Khushboo Jain, Ranjeet John, Nathan Torbick, Venkatesh Kolluru, Sakshi Saraf, Abhinav Chandel, Geoffrey M. Henebry, and Meghann Jarchow
Monitoring the Spatial Distribution of Cover Crops and Tillage Practices Using Machine Learning and Environmental Drivers across Eastern South Dakota, Khushboo Jain, Ranjeet John, Nathan Torbick, Venkatesh Kolluru, Sakshi Saraf, Abhinav Chandel, Geoffrey M. Henebry, and Meghann Jarchow
Dominant role of grazing and snow cover variability on vegetation shifts in the drylands of Kazakhstan, Venkatesh Kolluru, Ranjeet John, Jiquan Chen, Preethi Konkathi, Srinivas Kolluru, Sakshi Saraf, Geoffrey M. Henebry, Jingfeng Xiao, Khushboo Jain, and Maira Kussainova
Comparative analysis of diets in Sioux Falls: Influence of sociodemographic characteristics, alignment to US national diet and healthy diet, Jacinda Netzer and Meghann Jarchow
Techno-economic and life cycle assessment of agrivoltaic system (AVS) designs, Achyuth Ravilla, Gabriela Shirkey, Jiquan Chen, Meghann Jarchow, Olyssa Stary, and Ilke Celik
Formation of dust grains and dust emission processes, Mark R. Sweeney
Submissions from 2023
A Bayesian approach for multiscale modeling of the influence of seasonal and annual habitat variation on relative abundance of ring-necked pheasant roosters, Reza Goljani Amirkhiz, Ranjeet John, and David L. Swanson
The impact of sustainable tourism indicators on destination competitiveness: the European Tourism Indicator System, Xavier Font, Anna Torres-Delgado, Gloria Crabolu, J. Palomo Martinez, Joseph Kantenbacher, and Graham Miller
Last chance for wildlife: making tourism count for conservation, Christy Hehir, Caroline Scarles, Kayleigh J. Wyles, and Joe Kantenbacher
Gridded livestock density database and spatial trends for Kazakhstan, Venkatesh Kolluru, Ranjeet John, Sakshi Saraf, Jiquan Chen, Brett Hankerson, Sarah Robinson, Maira Kussainova, and Khushboo Jain
Introduction to Thematic Set: Aeolian Processes, Landforms and Chronologies, Nicholas Lancaster and Mark Sweeney
Global water use efficiency saturation due to increased vapor pressure deficit, Fei Li, Jingfeng Xiao, Jiquan Chen, Ashley Ballantyne, Ke Jin, Bing Li, Michael Abraha, and Ranjeet John
Measuring the impacts of climate change on the spatial structure of grasslands in urban landscapes of North America, Amin Rastandeh and Meghann Jarchow
Biophysical drivers for predicting the distribution and abundance of invasive yellow sweetclover in the Northern Great Plains, Sakshi Saraf, Ranjeet John, Reza Goljani Amirkhiz, Venkatesh Kolluru, Khushboo Jain, Matthew Rigge, Vincenzo Giannico, Stephen Boyte, Jiquan Chen, Geoffrey Henebry, Meghann Jarchow, and Raffaele Lafortezza
Biophysical drivers for predicting the distribution and abundance of invasive yellow sweetclover in the Northern Great Plains, Sakshi Saraf, Ranjeet John, Reza Goljani Amirkhiz, Venkatesh Kolluru, Khushboo Jain, Matthew Rigge, Vincenzo Giannico, Stephen Boyte, Jiquan Chen, Geoffrey Henebry, Meghann Jarchow, and Raffaele Lafortezza
Land cover change and socioecological influences on terrestrial carbon production in an agroecosystem, Gabriela Shirkey, Ranjeet John, Jiquan Chen, Venkatesh Kolluru, Reza Goljani Amirkhiz, Sandra T. Marquart-Pyatt, Lauren T. Cooper, and Michael Collins
The role of abrasion and resident fines in dust production from aeolian sands as measured by the Portable in situ Wind Erosion Laboratory (PI-SWERL), Mark R. Sweeney, Tad Lacey, and Steven L. Forman
Submissions from 2022
Expansion of woody vegetation on a Missouri River reservoir delta-backwater, Catherine C. Beall, Mark D. Dixon, Nadeesha D. Illeperuma, Mark R. Sweeney, and W. Carter Johnson
Sustainability challenges for the social-environmental systems across the Asian Drylands Belt, Jiquan Chen, Ranjeet John, Jing Yuan, Elizabeth A. Mack, Pavel Groisman, Ginger Allington, Jianguo Wu, Peilei Fan, Kirsten M. De Beurs, Arnon Karnieli, Garik Gutman, Martin Kappas, Gang Dong, Fangyuan Zhao, Zutao Ouyang, Amber L. Pearson, Beyza Şat, Norman A. Graham, Changliang Shao, Anna K. Graham, Geoffrey M. Henebry, Zhichao Xue, Amarjargal Amartuvshin, Luping Qu, Hogeun Park, Xiaoping Xin, Jingyan Chen, Li Tian, Colt Knight, Maira Kussainova, Fei Li, and Christine Fürst
Perceptions and Responses of Diversified Farm Producers in the Northern Great Plains to the Early Stage of the COVID-19 Pandemic, Roland Ebel, Selena Ahmed, Teresa Warne, Alexandria Moxley, Irene Grimberg, Meghann Jarchow, and Fabian D. Menalled
Redeveloping relationships with landscapes for food, water, and energy self-sufficiency in Southeastern South Dakota, USA, Meghann Jarchow
Young adults face the future of the United States: Perceptions of its promise, perils, and possibilities, Joseph Kantenbacher, Deidra Miniard, Nathaniel Geiger, Landon Yoder, and Shahzeen Z. Attari
Albedo changes caused by future urbanization contribute to global warming, Zutao Ouyang, Pietro Sciusco, Tong Jiao, Sarah Feron, Cheyenne Lei, Fei Li, Ranjeet John, Peilei Fan, Xia Li, Christopher A. Williams, Guangzhao Chen, Chenghao Wang, and Jiquan Chen
Non-monetary landscape features most desirable across the Upper Missouri River Basin, Amin Rastandeh, Morgan Carnes, and Meghann Jarchow
Creating resilient landscapes: From a hopeful vision to a long-lasting existence, Amin Rastandeh and Meghann Jarchow
Creating resilient landscapes in an era of climate change: Global case studies and real-world solutions, Amin Rastandeh and Meghann Jarchow
Landscape resilience in the face of climate change: A call to transition from despair to hope, Amin Rastandeh and Meghann Jarchow
Fine resolution remote sensing spectra improves estimates of gross primary production of croplands, Gabriela Shirkey, Ranjeet John, Jiquan Chen, Kyla Dahlin, Michael Abraha, Pietro Sciusco, Cheyenne Lei, and David E. Reed
Dust Emission Processes, Mark R. Sweeney
Contemporary and future dust sources and emission fluxes from gypsum and quartz-dominated eolian systems, New Mexico and Texas, USA, Mark R. Sweeney, Steven L. Forman, and Eric V. McDonald
Untangling the impacts of socioeconomic and climatic changes on vegetation greenness and productivity in Kazakhstan, Kolluru Venkatesh, Ranjeet John, Jiquan Chen, Meghann Jarchow, Reza Goljani Amirkhiz, Vincenzo Giannico, Sakshi Saraf, Khushboo Jain, Maira Kussainova, and Jing Yuan
Untangling the impacts of socioeconomic and climatic changes on vegetation greenness and productivity in Kazakhstan, Kolluru Venkatesh, Ranjeet John, Jiquan Chen, Meghann Jarchow, Reza Goljani Amirkhiz, Vincenzo Giannico, Sakshi Saraf, Khushboo Jain, Maira Kussainova, and Jing Yuan
Optimal ranges of social-environmental drivers and their impacts on vegetation dynamics in Kazakhstan, Kolluru Venkatesh, Ranjeet John, Jiquan Chen, Jingfeng Xiao, Reza Goljani Amirkhiz, Vincenzo Giannico, and Maira Kussainova
Land Use Hotspots of the Two Largest Landlocked Countries: Kazakhstan and Mongolia, Jing Yuan, Jiquan Chen, Pietro Sciusco, Venkatesh Kolluru, Sakshi Saraf, Ranjeet John, and Batkhishig Ochirbat
Submissions from 2021
Systematic review on effects of bioenergy from edible versus inedible feedstocks on food security, Selena Ahmed, Teresa Warne, Erin Smith, Hannah Goemann, Greta Linse, Mark Greenwood, Jeremy Kedziora, Meghan Sapp, Debra Kraner, Kelli Roemer, Julia H. Haggerty, Meghann Jarchow, David Swanson, Benjamin Poulter, and Paul C. Stoy
How does mining policy affect rural migration of Mongolia?, Amarjargal Amartuvshin, Jiquan Chen, Ranjeet John, Yaoqi Zhang, and Dansranbavuu Lkhagvaa
Key competencies in sustainability in higher education—toward an agreed-upon reference framework, Katja Brundiers, Matthias Barth, Gisela Cebrián, Matthew Cohen, Liliana Diaz, Sonya Doucette-Remington, Weston Dripps, Geoffrey Habron, Niki Harré, Meghann Jarchow, Kealalokahi Losch, Jessica Michel, Yoko Mochizuki, Marco Rieckmann, Roderic Parnell, Peter Walker, and Michaela Zint
State and change of Dryland East Asia (DEA), Jiquan Chen, Ranjeet John, Guanghua Qiao, Ochirbat Batkhishig, Wenping Yuan, Yaoqi Zhang, Changliang Shao, Zutao Ouyang, Linghao Li, Ke Guo, and Ge Sun
Towards a single integrative metric on the dynamics of social-environmental systems, Jiquan Chen, Ranjeet John, Changliang Shao, Zutao Ouyang, Elizabeth A. Mack, Geoffrey M. Henebry, Gang Dong, Ginger R.H. Allington, Amber L. Pearson, Fangyuan Zhao, David P. Roy, Peilei Fan, Gabriela E. Shirkey, Li Tian, Maira Kussainova, Jingyan Chen, David E. Reed, and Michael Abraha
Dryland East Asia in hemispheric context, Geoffrey M. Henebry, Kirsten M. de Beurs, Christopher K. Wright, Ranjeet John, and Elena Lioubimtseva
Contributions of suspended load from Missouri River tributaries, southeast South Dakota, and northeast Nebraska: Building a sediment budget, Marcella Jurotich, Nathan Cardona, Bethany Vázquez, Ruthie Wetzel, Tim Cowman, and Mark Sweeney
Better rules for judging joules: Exploring how experts make decisions about household energy use, Joseph Kantenbacher and Shahzeen Z. Attari
Spatial analysis of landscape social values in multifunctional landscapes of the Upper Missouri River Basin, Amin Rastandeh, Morgan Carnes, and Meghann Jarchow
Urbanization and biodiversity loss in the post-COVID-19 era: complex challenges and possible solutions, Amin Rastandeh and Meghann Jarchow
Incorporating social values and wildlife habitats for biodiversity conservation modeling in landscapes of the Great Plains, Amin Rastandeh, Meghann Jarchow, and Morgan Carnes
Beyond exotic goods: Wari elites and regional interaction in the Andes during the Middle Horizon (AD 600-1000), Silvana A. Rosenfeld, Brennan T. Jordan, and Megan E. Street
Dynamics of vegetation productivity in Dryland East Asia from 1982 to 2010, Jingfeng Xiao, Li Zhang, Jiquan Chen, and Ranjeet John
Submissions from 2020
Petrogenesis of silicic magmas in iceland through space and time: The isotopic record preserved in zircon and whole rocks, Tamara L. Carley, Calvin F. Miller, Christopher M. Fisher, John M. Hanchar, Jeffery D. Vervoort, Axel K. Schmitt, Rita C. Economos, Brennan T. Jordan, Abraham J. Padilla, and Tenley J. Banik
Flying less: personal health and environmental co-benefits, Scott A. Cohen and Joseph Kantenbacher
Shared vision for a decarbonized future energy system in the United States, Deidra Miniard, Joseph Kantenbacher, and Shahzeen Z. Attari
Spatiotemporal variations of albedo in managed agricultural landscapes: inferences to global warming impacts (GWI), Pietro Sciusco, Jiquan Chen, Michael Abraha, Cheyenne Lei, G. Philip Robertson, Raffaele Lafortezza, Gabriela Shirkey, Zutao Ouyang, Rong Zhang, and Ranjeet John
The role of eolian-fluvial interactions and dune dams in landscape change, late Pleistocene–Holocene, Mojave Desert, USA, Mark R. Sweeney, Eric V. McDonald, Lucas P. Chabela, and Paul R. Hanson
Submissions from 2019
Meteorological catalysts of dust events and particle source dynamics of affected soils during the 1930s Dust Bowl drought, Southern High Plains, USA, K. Bolles, Mark Sweeney, and Steven Forman
Linear downscaling from MODIS to landsat: connecting landscape composition with ecosystem functions, Jiquan Chen, Pietro Sciusco, Zutao Ouyang, Rong Zhang, Geoffrey M. Henebry, Ranjeet John, and David P. Roy
Quantifying the effect of geomorphology on aeolian dust emission potential in northern China, Mengchun Cui, Huayu Lu, Giles F.S. Wiggs, Vicken Etyemezian, Mark R. Sweeney, and Zhiwei Xu
Trade associations as corporate social responsibility actors: an institutional theory analysis of animal welfare in tourism, Xavier Font, Maria Jesús Bonilla-Priego, and Joe Kantenbacher
Improving resilience to hot weather in the UK: The role of communication, behaviour and social insights in policy interventions, Candice Howarth, Joe Kantenbacher, Kristen Guida, Tom Roberts, and Mel Rohse
Iceland: The Formation and Evolution of a Young, Dynamic, Volcanic Island—A Field Trip Guide, Brennan T. Jordan, Tamara L. Carley, and Tenley J. Banik
Consumer priorities: what would people sacrifice in order to fly on holidays?, Joseph Kantenbacher, Paul Hanna, Graham Miller, Caroline Scarles, and Jingjing Yang
Productivity and diversity of annually harvested reconstructed prairie communities, Farnaz Kordbacheh, Meghann Jarchow, Lydia English, and Matt Liebman
A Bayesian approach to mapping the uncertainties of global urban lands, Zutao Ouyang, Peilei Fan, Jiquan Chen, Raffaele Lafortezza, Joseph P. Messina, Vincenzo Giannico, and Ranjeet John
Spatiotemporal changes of informal settlements: Ger districts in Ulaanbaatar, Mongolia, Hogeun Park, Peilei Fan, Ranjeet John, Zutao Ouyang, and Jiquan Chen
Eolian and fluvial modification of Missouri River sandbars deposited by the 2011 flood, USA, Mark R. Sweeney, Ben Fischer, Karen Wermers, and Tim Cowman
Livestock dynamics under changing economy and climate in Mongolia, Yecheng Xu, Y. Zhang, Jiquan Chen, and Ranjeet John
Submissions from 2018
Whole-rock 40Ar/39Ar geochronology, geochemistry, and stratigraphy of intraplate Cenozoic volcanic rocks, central Mongolia, Leonard D. Ancuta, Peter K. Zeitler, Bruce D. Idleman, and Brennan T. Jordan
Prospects for the sustainability of social-ecological systems (SES) on the Mongolian plateau: Five critical issues, Jiquan Chen, Ranjeet John, Ge Sun, Peilei Fan, Geoffrey M. Henebry, María E. Fernández-Giménez, Yaoqi Zhang, Hogeun Park, Li Tian, Pavel Groisman, Zutao Ouyang, Ginger Allington, Jianguo Wu, Changliang Shao, Amartuvshin Amarjargal, Gang Dong, Garik Gutman, Falk Huettmann, Raffaele Lafortezza, Connor Crank, and Jiaguo Qi
Contributions of landscape heterogeneity within the footprint of eddy-covariance towers to flux measurements, Vincenzo Giannico, Jiquan Chen, Changliang Shao, Zutao Ouyang, Ranjeet John, and Raffaele Lafortezza
Dryland belt of Northern Eurasia: Contemporary environmental changes and their consequences, Pavel Groisman, Olga Bulygina, Geoffrey Henebry, Nina Speranskaya, Alexander Shiklomanov, Yizhao Chen, Nadezhda Tchebakova, Elena Parfenova, Natalia Tilinina, Olga Zolina, Ambroise Dufour, Jiquan Chen, Ranjeet John, Peilei Fan, Csaba Mátyás, Irina Yesserkepova, and Ildan Kaipov
Role model advocacy for sustainable transport, Paul Hanna, Joe Kantenbacher, Scott Cohen, and Stefan Gössling
Measuring longitudinal student performance on student learning outcomes in sustainability education, Meghann E. Jarchow, Paul Formisano, Shane Nordyke, and Matthew Sayre
Grassland canopy cover and aboveground biomass in Mongolia and Inner Mongolia: Spatiotemporal estimates and controlling factors, Ranjeet John, Jiquan Chen, Vincenzo Giannico, Hogeun Park, Jingfeng Xiao, Gabriela Shirkey, Zutao Ouyang, Changliang Shao, Raffaele Lafortezza, and Jiaguo Qi
Public attitudes about climate policy options for aviation, Joseph Kantenbacher, Paul Hanna, Scott Cohen, Graham Miller, and Caroline Scarles
Loess-paleosol carbonate clumped isotope record of late Pleistocene-Holocene climate change in the Palouse region, Washington State, USA, Alex R. Lechler, Katharine W. Huntington, Daniel O. Breecker, Mark R. Sweeney, and Andrew J. Schauer
Opportunities and Trade-offs among BECCS and the Food, Water, Energy, Biodiversity, and Social Systems Nexus at Regional Scales, Paul C. Stoy, Selena Ahmed, Meghann Jarchow, Benjamin Rashford, David Swanson, Shannon Albeke, Gabriel Bromley, E. N.J. Brookshire, Mark D. Dixon, Julia Haggerty, Perry Miller, Brent Peyton, Alisa Royem, Lee Spangler, Crista Straub, and Benjamin Poulter
Submissions from 2017
Eolian processes and heterogeneous dust emissivity during the 1930s Dust Bowl Drought and implications for projected 21st-century megadroughts, Kasey Bolles, Steven L. Forman, and Mark Sweeney
Fluxes all of the time? A primer on the temporal representativeness of FLUXNET, Housen Chu, Dennis D. Baldocchi, Ranjeet John, Sebastian Wolf, and Markus Reichstein
Post-catastrophe Analysis of the Fundão Tailings Dam Failure in the Doce River System, Southeast Brazil: Potentially Toxic Elements in Affected Soils, Marcelo Braga Bueno Guerra, Brian T. Teaney, Brianna J. Mount, Daniel J. Asunskis, Brennan T. Jordan, Ryan J. Barker, Eliana E. Santos, and Carlos Ernesto G.R. Schaefer
Renewable Energy: Scaling Deployment in the United States and in Developing Economies. Scaling Deployment in the United States and in Developing Economies., Joseph Kantenbacher and Rebekah Shirley
The effect of algal blooms on carbon emissions in western lake erie: An integration of remote sensing and eddy covariance measurements, Zutao Ouyang, Changliang Shao, Housen Chu, Richard Becker, Thomas Bridgeman, Carol A. Stepien, Ranjeet John, and Jiquan Chen
Urbanization on the Mongolian Plateau after economic reform: Changes and causes, Hogeun Park, Peilei Fan, Ranjeet John, and Jiquan Chen
Understanding livestock production and sustainability of grassland ecosystems in the Asian Dryland Belt, Jiaguo Qi, Xiaoping Xin, Ranjeet John, Pavel Groisman, and Jiquan Chen
Grassland productivity and carbon sequestration in Mongolian grasslands: The underlying mechanisms and nomadic implications, Changliang Shao, Jiquan Chen, Housen Chu, Raffaele Lafortezza, Gang Dong, Michael Abraha, Ochirbat Batkhishig, Ranjeet John, Zutao Ouyang, Yaoqi Zhang, and Jiaguo Qi
Grazing effects on surface energy fluxes in a desert steppe on the Mongolian Plateau:, Changliang Shao, Jiquan Chen, Linghao Li, Gang Dong, Juanjuan Han, Michael Abraha, and Ranjeet John
Generation of the Palouse loess: Exploring the linkages between glaciation, outburst megafloods, and eolian deposition in Washington State, Mark R. Sweeney, Eric V. McDonald, and David R. Gaylord
Submissions from 2016
Pleistocene megaflood landscapes of the Channeled Scabland, Victor R. Baker, Bruce N. Bjornstad, David R. Gaylord, Gary A. Smith, Scott E. Meyer, Petteri Alho, Roy M. Breckenridge, Mark R. Sweeney, and Marek Zreda
How efficiently do corn- and soybean-based cropping systems use water? A systems modeling analysis, Ranae Dietzel, Matt Liebman, Robert Ewing, Matt Helmers, Robert Horton, Meghann Jarchow, and Sotirios Archontoulis
Urbanization and environmental change during the economic transition on the Mongolian Plateau: Hohhot and Ulaanbaatar, Peilei Fan, Jiquan Chen, and Ranjeet John
Applications of structural equation modeling (SEM) in ecological studies: an updated review, Yi Fan, Jiquan Chen, Gabriela Shirkey, Ranjeet John, Susie R. Wu, Hogeun Park, and Changliang Shao
Estimating stand volume and above-ground biomass of urban forests using LiDAR, Vincenzo Giannico, Raffaele Lafortezza, Ranjeet John, Giovanni Sanesi, Lucia Pesola, and Jiquan Chen
Beyond band-aids: Using systems thinking to assess environmental justice, Meghann Jarchow
Differentiating anthropogenic modification and precipitation-driven change on vegetation productivity on the Mongolian Plateau, Ranjeet John, Jiquan Chen, Youngwook Kim, Zu tao Ou-yang, Jingfeng Xiao, Hoguen Park, Changliang Shao, Yaoqi Zhang, Amartuvshin Amarjargal, Ochirbat Batkhshig, and Jiaguo Qi
Identification of a Kulshan caldera correlative tephra in the Palouse loess of Washington State, northwest USA, Georgina E. King, Nicholas J.G. Pearce, Helen M. Roberts, Victoria C. Smith, John A. Westgate, David R. Gaylord, and Mark R. Sweeney