[{"intvolume":"       130","publisher":"Wiley","isi":1,"type":"journal_article","quality_controlled":"1","scopus_import":"1","article_number":"e2025JF008360","has_accepted_license":"1","citation":{"ama":"Melo Velasco JV, Miles E, McCarthy M, et al. Method dependence in thermal conductivity and aerodynamic roughness length estimates on a debris‐covered glacier. <i>Journal of Geophysical Research: Earth Surface</i>. 2025;130(6). doi:<a href=\"https://doi.org/10.1029/2025jf008360\">10.1029/2025jf008360</a>","ieee":"J. V. Melo Velasco <i>et al.</i>, “Method dependence in thermal conductivity and aerodynamic roughness length estimates on a debris‐covered glacier,” <i>Journal of Geophysical Research: Earth Surface</i>, vol. 130, no. 6. Wiley, 2025.","mla":"Melo Velasco, Juan Vicente, et al. “Method Dependence in Thermal Conductivity and Aerodynamic Roughness Length Estimates on a Debris‐covered Glacier.” <i>Journal of Geophysical Research: Earth Surface</i>, vol. 130, no. 6, e2025JF008360, Wiley, 2025, doi:<a href=\"https://doi.org/10.1029/2025jf008360\">10.1029/2025jf008360</a>.","ista":"Melo Velasco JV, Miles E, McCarthy M, Shaw T, Fyffe CL, Fontrodona-Bach A, Pellicciotti F. 2025. Method dependence in thermal conductivity and aerodynamic roughness length estimates on a debris‐covered glacier. Journal of Geophysical Research: Earth Surface. 130(6), e2025JF008360.","chicago":"Melo Velasco, Juan Vicente, Evan Miles, Michael McCarthy, Thomas Shaw, Catriona Louise Fyffe, Adrià Fontrodona-Bach, and Francesca Pellicciotti. “Method Dependence in Thermal Conductivity and Aerodynamic Roughness Length Estimates on a Debris‐covered Glacier.” <i>Journal of Geophysical Research: Earth Surface</i>. Wiley, 2025. <a href=\"https://doi.org/10.1029/2025jf008360\">https://doi.org/10.1029/2025jf008360</a>.","short":"J.V. Melo Velasco, E. Miles, M. McCarthy, T. Shaw, C.L. Fyffe, A. Fontrodona-Bach, F. Pellicciotti, Journal of Geophysical Research: Earth Surface 130 (2025).","apa":"Melo Velasco, J. V., Miles, E., McCarthy, M., Shaw, T., Fyffe, C. L., Fontrodona-Bach, A., &#38; Pellicciotti, F. (2025). Method dependence in thermal conductivity and aerodynamic roughness length estimates on a debris‐covered glacier. <i>Journal of Geophysical Research: Earth Surface</i>. Wiley. <a href=\"https://doi.org/10.1029/2025jf008360\">https://doi.org/10.1029/2025jf008360</a>"},"file_date_updated":"2025-06-24T06:27:34Z","_id":"19878","author":[{"full_name":"Melo Velasco, Juan Vicente","last_name":"Melo Velasco","id":"2611dec0-b9c6-11ed-9bea-a81c2b17a549","first_name":"Juan Vicente"},{"last_name":"Miles","first_name":"Evan","full_name":"Miles, Evan"},{"first_name":"Michael","last_name":"McCarthy","id":"22a2674a-61ce-11ee-94b5-d18813baf16f","full_name":"McCarthy, Michael"},{"orcid":"0000-0001-7640-6152","id":"3caa3f91-1f03-11ee-96ce-e0e553054d6e","last_name":"Shaw","first_name":"Thomas","full_name":"Shaw, Thomas"},{"first_name":"Catriona Louise","last_name":"Fyffe","id":"001b0422-8d15-11ed-bc51-cab6c037a228","full_name":"Fyffe, Catriona Louise"},{"full_name":"Fontrodona-Bach, Adrià","id":"f06891fd-9f42-11ee-8632-a20971c43046","last_name":"Fontrodona-Bach","first_name":"Adrià"},{"id":"b28f055a-81ea-11ed-b70c-a9fe7f7b0e70","last_name":"Pellicciotti","orcid":"0000-0002-5554-8087","first_name":"Francesca","full_name":"Pellicciotti, Francesca"}],"article_processing_charge":"Yes (via OA deal)","date_created":"2025-06-23T13:54:01Z","acknowledgement":"This project received funding from the Swiss National Science Foundation (Grant 204322, project “REsolving the thickNess Of debris on Earth's glacIers and its Rate of change,” RENOIR). We thank Lars Groeneveld, Diego Hernández, Alonso Mejías, Gabriela Reyes and Gabriela Tala for their support during fieldwork. Open access funding provided by Institute of Science and Technology Austria/KEMÖ.","publication_identifier":{"eissn":["2169-9011"],"issn":["2169-9003"]},"department":[{"_id":"FrPe"}],"OA_place":"publisher","volume":130,"external_id":{"isi":["001508794200001"]},"title":"Method dependence in thermal conductivity and aerodynamic roughness length estimates on a debris‐covered glacier","article_type":"original","publication":"Journal of Geophysical Research: Earth Surface","year":"2025","day":"15","corr_author":"1","license":"https://creativecommons.org/licenses/by/4.0/","file":[{"relation":"main_file","content_type":"application/pdf","date_updated":"2025-06-24T06:27:34Z","access_level":"open_access","creator":"dernst","file_size":3949928,"file_name":"2025_JGREarthSurface_MeloVelasco.pdf","success":1,"file_id":"19886","date_created":"2025-06-24T06:27:34Z","checksum":"ca91541516c71d240321630ca42b4dc4"}],"date_updated":"2025-09-30T13:42:28Z","oa_version":"Published Version","issue":"6","oa":1,"language":[{"iso":"eng"}],"OA_type":"hybrid","month":"06","tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","doi":"10.1029/2025jf008360","ddc":["550"],"publication_status":"published","abstract":[{"lang":"eng","text":"Rock debris partially covers glaciers worldwide, with varying extents and distributions, and controls sub‐debris melt rates by modifying energy transfer from the atmosphere to the ice. Two key physical properties controlling this energy exchange are thermal conductivity (k) and aerodynamic roughness length (z0). Accurate representation of these properties in energy‐balance models is critical for understanding climate‐glacier interactions and predicting the behavior of debris‐covered glaciers. However, k and z0 have been derived at very few sites from limited local measurements, using different approaches, and most model applications rely on values reported from these few sites and studies. We derive k and z0 using established and modified approaches from data at three locations on Pirámide Glacier in the central Chilean Andes. By comparing methods and evaluating melt simulated with an energy‐balance model, we reveal substantial differences between approaches. These lead to discrepancies between ice melt from energy‐balance simulations and observed data, and highlight the impact of method choice on calculated ice melt. Optimizing k against measured melt appears a viable approach to constrain melt simulations. Determining z0 seems less critical, as it has a smaller impact on total melt. Profile aerodynamic method measurements for estimating z0, despite higher costs, are independent of ice melt calculations. The large, unexpected differences between methods indicate a substantial knowledge gap. The fact that field‐derived k and z0 fail to work well in energy‐balance models, suggests that model values represent bulk properties distinct from theoretical field measurements. Addressing this gap is essential for improving glacier melt predictions."}],"date_published":"2025-06-15T00:00:00Z","status":"public"},{"doi":"10.1002/2016jf004039","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"11","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1002/2016JF004039"}],"date_published":"2016-11-22T00:00:00Z","status":"public","abstract":[{"text":"We use high-resolution digital elevation models (DEMs) from unmanned aerial vehicle (UAV) surveys to document the evolution of four ice cliffs on the debris-covered tongue of Lirung Glacier, Nepal, over one ablation season. Observations show that out of four cliffs, three different patterns of evolution emerge: (i) reclining cliffs that flatten during the ablation season; (ii) stable cliffs that maintain a self-similar geometry; and (iii) growing cliffs, expanding laterally. We use the insights from this unique data set to develop a 3-D model of cliff backwasting and evolution that is validated against observations and an independent data set of volume losses. The model includes ablation at the cliff surface driven by energy exchange with the atmosphere, reburial of cliff cells by surrounding debris, and the effect of adjacent ponds. The cliff geometry is updated monthly to account for the modifications induced by each of those processes. Model results indicate that a major factor affecting the survival of steep cliffs is the coupling with ponded water at its base, which prevents progressive flattening and possible disappearance of a cliff. The radial growth observed at one cliff is explained by higher receipts of longwave and shortwave radiation, calculated taking into account atmospheric fluxes, shading, and the emission of longwave radiation from debris surfaces. The model is a clear step forward compared to existing static approaches that calculate atmospheric melt over an invariant cliff geometry and can be used for long-term simulations of cliff evolution and to test existing hypotheses about cliffs' survival.","lang":"eng"}],"publication_status":"published","extern":"1","day":"22","oa":1,"language":[{"iso":"eng"}],"issue":"12","oa_version":"Published Version","date_updated":"2023-02-24T11:34:54Z","date_created":"2023-02-20T08:14:28Z","article_processing_charge":"No","publication_identifier":{"eissn":["2169-9011"],"issn":["2169-9003"]},"title":"A physically based 3‐D model of ice cliff evolution over debris‐covered glaciers","article_type":"original","volume":121,"year":"2016","publication":"Journal of Geophysical Research: Earth Surface","page":"2471-2493","type":"journal_article","intvolume":"       121","publisher":"American Geophysical Union","author":[{"full_name":"Buri, Pascal","first_name":"Pascal","last_name":"Buri"},{"full_name":"Miles, Evan S.","last_name":"Miles","first_name":"Evan S."},{"first_name":"Jakob F.","last_name":"Steiner","full_name":"Steiner, Jakob F."},{"last_name":"Immerzeel","first_name":"Walter W.","full_name":"Immerzeel, Walter W."},{"first_name":"Patrick","last_name":"Wagnon","full_name":"Wagnon, Patrick"},{"full_name":"Pellicciotti, Francesca","id":"b28f055a-81ea-11ed-b70c-a9fe7f7b0e70","last_name":"Pellicciotti","first_name":"Francesca"}],"_id":"12613","quality_controlled":"1","scopus_import":"1","citation":{"apa":"Buri, P., Miles, E. S., Steiner, J. F., Immerzeel, W. W., Wagnon, P., &#38; Pellicciotti, F. (2016). A physically based 3‐D model of ice cliff evolution over debris‐covered glaciers. <i>Journal of Geophysical Research: Earth Surface</i>. American Geophysical Union. <a href=\"https://doi.org/10.1002/2016jf004039\">https://doi.org/10.1002/2016jf004039</a>","short":"P. Buri, E.S. Miles, J.F. Steiner, W.W. Immerzeel, P. Wagnon, F. Pellicciotti, Journal of Geophysical Research: Earth Surface 121 (2016) 2471–2493.","chicago":"Buri, Pascal, Evan S. Miles, Jakob F. Steiner, Walter W. Immerzeel, Patrick Wagnon, and Francesca Pellicciotti. “A Physically Based 3‐D Model of Ice Cliff Evolution over Debris‐covered Glaciers.” <i>Journal of Geophysical Research: Earth Surface</i>. American Geophysical Union, 2016. <a href=\"https://doi.org/10.1002/2016jf004039\">https://doi.org/10.1002/2016jf004039</a>.","ista":"Buri P, Miles ES, Steiner JF, Immerzeel WW, Wagnon P, Pellicciotti F. 2016. A physically based 3‐D model of ice cliff evolution over debris‐covered glaciers. Journal of Geophysical Research: Earth Surface. 121(12), 2471–2493.","mla":"Buri, Pascal, et al. “A Physically Based 3‐D Model of Ice Cliff Evolution over Debris‐covered Glaciers.” <i>Journal of Geophysical Research: Earth Surface</i>, vol. 121, no. 12, American Geophysical Union, 2016, pp. 2471–93, doi:<a href=\"https://doi.org/10.1002/2016jf004039\">10.1002/2016jf004039</a>.","ieee":"P. Buri, E. S. Miles, J. F. Steiner, W. W. Immerzeel, P. Wagnon, and F. Pellicciotti, “A physically based 3‐D model of ice cliff evolution over debris‐covered glaciers,” <i>Journal of Geophysical Research: Earth Surface</i>, vol. 121, no. 12. American Geophysical Union, pp. 2471–2493, 2016.","ama":"Buri P, Miles ES, Steiner JF, Immerzeel WW, Wagnon P, Pellicciotti F. A physically based 3‐D model of ice cliff evolution over debris‐covered glaciers. <i>Journal of Geophysical Research: Earth Surface</i>. 2016;121(12):2471-2493. doi:<a href=\"https://doi.org/10.1002/2016jf004039\">10.1002/2016jf004039</a>"},"keyword":["Earth-Surface Processes","Geophysics"]}]