Research Outputs

‍Xing Z, Hugenholtz CH, Barchyn TE, Gough T, Vollrath C. 2026. Source category attribution of methane emissions in Calgary using Positive Matrix Factorization (PMF). Environmental Science & Technology Air 3(2): 396-407. https://doi.org/10.1021/acsestair.5c00323

Samuel, J., & Hugenholtz, C. H. (2026). Methane emissions from sewer covers: A case study of Calgary’s wastewater collection system. Journal of the Air & Waste Management Association, 76(6), 463–471. https://doi.org/10.1080/10962247.2026.2624095

Vollrath C, Hugenholtz CH, Munn A, Barchyn TE, Wearmouth C. 2026. A Human-Portable Flux Plane Method for Methane Emissions Quantification: Controlled Release Testing Performance Evaluation. Atmospheric Measurement Technology 19: 583-601. https://doi.org/10.5194/amt-19-583-2026

Gough TR, Hugenholtz CH, Nesbit P, Barchyn TE. 2026. Spatial variability and mechanics in aeolian ripples: A case study in Chilean Patagonia. Earth & Planetary Science Letters 6579: 119892. https://doi.org/10.1016/j.epsl.2026.119892

Kucharczyk M, Nesbit P, Hugenholtz CH. 2025. Automated mapping of post-storm roof damage using deep learning and aerial imagery: a case study in the Caribbean. Remote Sensing 17(20): 3456. https://doi.org/10.3390/rs17203456

Xing Z, Barchyn TE, Vollrath C, Hugenholtz CH. 2025. Satellite observations indicate a declining trend of methane emissions from heavy oil production in Canada. Environmental Science & Technology Letters 12(10): 1334-39. https://doi.org/10.1021/acs.estlett.5c00426

Vollrath C, Xing Z, Hugenholtz CH, Barchyn TE, Winters J. 2025. A review of methane emissions sources, characteristics, and rates across U.S. and Canadian cities. Environmental Research Letters 20: 083003. https://doi.org/10.1088/1748-9326/ade9e1

Vollrath C, Hugenholtz CH, Barchyn TE, Wearmouth C. 2024. Methane emissions from residential natural gas pressure regulators and meter set assemblies. Science of the Total Environment 931: 172857. https://doi.org/10.1016/j.scitotenv.2024.172857

Xing Z, Barchyn TE, Vollrath C, Gao M, Hugenholtz CH. 2024. Satellite-derived estimate of city-level methane emissions flux from Calgary, Alberta, Canada. Remote Sensing 16(7):1149. https://doi.org/10.3390/rs16071149

Vollrath C, Hugenholtz CH, Barchyn TE. 2024. Onshore methane emissions measurements from the oil and gas industry: A scoping review. Environmental Research Communications 6: 032001. https://doi.org/10.1088/2515-7620/ad3129

Barchyn TE, Hugenholtz CH, Gough T, Vollrath C, Gao M. 2023. Low-cost fixed sensor deployments for leak detection in upstream oil and gas: operational analysis and discussion of a prototypical program. Elementa: Science of the Anthropocene 11:1 00045. https://doi.org/10.1525/elementa.2023.00045

Gao M, Hugenholtz CH, Xing Z, Barchyn TE, Vollrath C. 2023. Global observational coverage of oil and gas methane sources with TROPOMI. Nature Scientific Reports 13: 16759. https://doi.org/10.1038/s41598-023-41914-8

Gao M, Hugenholtz CH, Staples M, Barchyn TE, Gough TR, Vollrath C, Xing Z. 2023. A cooperative model to lower cost and increase the efficiency of methane leak inspections at oil and gas sites. Elementa: Science of the Anthropocene 11(1): 00030. https://doi.org/10.1525/elementa.2023.00030

Staples M, Hugenholtz CH, Ramirez-Serrano A, Barchyn TE, Gao M. 2023. A Comparison of multiple odor source localization algorithms. Sensors 23(10), 4799. https://doi.org/10.3390/s23104799

Gao M, Hugenholtz CH, Barchyn TE. 2022. Development and validation of a route planning methodology for vehicle-based remote measurements of methane and other emissions from oil and gas wells and facilities. Journal of the Air & Waste Management Association 72(11): 1279-1289. https://doi.org/10.1080/10962247.2022.2113182

Nesbit PR, Hubbard SM, Hugenholtz CH. 2022. Direct georeferencing UAV-SfM in high-relief topography: Accuracy assessment and alternative ground control strategies along steep inaccessible rock slopes. Remote Sensing 14(3): 490. https://doi.org/10.3390/rs14030490

Gough T, Hugenholtz CH, Barchyn TE. 2021. Re-evaluation of large Martian ripples in Gale Crater: granulometric evidence for an impact mechanism and terrestrial analogies. Journal of Geophysical Research – Planets 126(12): e2021JE007011. https://doi.org/10.1029/2021JE007011

Kucharczyk M, Hugenholtz CH. 2021. Remote sensing of natural hazard-related disasters with small drones: global trends, biases, and research opportunities. Remote Sensing & Environment 264: 112577. https://doi.org/10.1016/j.rse.2021.112577

Hugenholtz CH, Vollrath C, Gough T, Wearmouth C, Fox TA, Barchyn TE, Billinghurst C. 2021. Methane emissions from above-ground natural gas distribution facilities in the urban environment: a fence line methodology and case study in Calgary, Alberta, Canada. Journal of the Air & Waste Management Association 71(11): 1319-32. https://doi.org/10.1080/10962247.2021.1942316

Fox TA, Hugenholtz CH, Barchyn TE, Gough T, Gao M, Staples M. 2021. Can new mobile technologies enable fugitive methane reductions from the oil and gas industry? Environmental Research Letters 16(6): 064077. https://doi.org/10.1088/1748-9326/ac0565

Gao M, Hugenholtz CH, Fox TA, Kucharczyk M, Barchyn TE, Nesbit P. 2021. Weather constraints on global drone flyability. Nature Scientific Reports 11: 12092. https://doi.org/10.1038/s41598-021-91325-w

Fox TA, Barchyn TE, Gao M, Jamin Y, Hugenholtz CH. 2021. An agent-based model for estimating emissions reduction equivalence among leak detection and repair programs. Journal of Cleaner Production 282(1): 125237. https://doi.org/10.1016/j.jclepro.2020.125237

Gough T, Hugenholtz CH, Barchyn TE. 2020. Eolian megaripple stripes. Geology 48(11): 1067-1071. https://doi.org/10.1130/G47460.1

Kucharczyk M, Hay G, Ghaffarian S, Hugenholtz CH. 2020. Geographic Object-Based Image Analysis: A Primer and Future Directions. Remote Sensing 12(12). https://doi.org/10.3390/rs12122012

Nesbit P, Boulding AD, Hugenholtz CH, Durkin PR, Hubbard SM. 2020. Visualization and sharing of 3D digital outcrop models to promote Open Science. GSA Today 30(6): 4-10. https://doi.org/10.1130/GSATG425A.1

Barchyn TE, Hugenholtz CH, Fox TA. 2019. Plume detection modeling of a drone-based natural gas leak detection system. Elementa: Science of the Anthropocene 7(1). https://doi.org/10.1525/elementa.379

Fox TA, Ravikumar A, Hugenholtz CH, Zimmerle D, Barchyn TE, Johnson MR, Lyon D, Taylor T. 2019. A methane emissions reduction equivalence framework for alternative leak detection and repair programs. Elementa: Science of the Anthropocene 7(1). https://doi.org/10.1525/elementa.369

Kucharczyk M, Hugenholtz CH. 2019. Pre-disaster mapping with drones: an urban case study in Victoria, BC, Canada. Natural Hazards and Earth System Sciences 19: 2039-2051. https://doi.org/10.5194/nhess-19-2039-2019

Fox TA, Barchyn TE, Risk D, Ravikumar A, Hugenholtz CH. 2019. A review of close-range and screening technologies for measuring fugitive methane emissions in upstream oil and gas. Environmental Research Letters 14: 053002. https://doi.org/10.1088/1748-9326/ab0cc3

Nesbit P, Hugenholtz CH. 2019. Enhancing UAV–SfM 3D Model Accuracy in High-Relief Landscapes by Incorporating Oblique Images. Remote Sensing 11(3): 239. https://doi.org/10.3390/rs11030239

Nesbit PR, Durkin PR, Hugenholtz CH, Hubbard SM, Kucharczyk M. 2018. 3D stratigraphic mapping using a digital outcrop model derived from UAV images and Structure from Motion photogrammetry. Geosphere 14(6): 2469-2486. https://doi.org/10.1130/GES01688.1

Kucharczyk M, Hugenholtz CH, Zou X. 2018. UAV-LiDAR accuracy in vegetated terrain. Journal of Unmanned Vehicle Systems 6(4): 212-234. https://doi.org/10.1139/juvs-2017-0030

Martin RL, Kok JF, Hugenholtz CH, Barchyn TE, Chamecki M, Ellis JT. 2018. High-frequency measurements of aeolian saltation flux: Field-based methodology and applications. Aeolian Research 30: 97-114. https://doi.org/10.1016/j.aeolia.2017.12.003

Barchyn TE, Hugenholtz CH, Myshak S, Bauer, J. 2018. A UAV-based system for detecting natural gas leaks. Journal of Unmanned Vehicle Systems 6(1): 18-30. https://doi.org/10.1139/juvs-2017-0018