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https://doi.org/10.5194/egusphere-2024-1681
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/egusphere-2024-1681
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
25 Jul 2024
| 25 Jul 2024
Status: this preprint is open for discussion.
Brief communication: Not as dirty as they look, flawed airborne and satellite snow spectra
Abstract. Key to the success of spaceborne missions is understanding snowmelt in our warming climate, having implications for nearly 2 billion people. An obstacle is that surface reflectance products over snow show an erroneous hook that often shows sharp decreases in the visible wavelengths. This hook is sometimes mistaken for soot or dust but can result from three artifacts: 1) a background reflectance that is too dark; 2) an assumption of level terrain; 3) or differences in optical constants of ice. Sensor calibration and directional effects may also contribute. Solutions currently being implemented address these artifacts.
How to cite. Bair, E. H., Roberts, D. A., Thompson, D. R., Brodrick, P. G., Wilder, B. A., Bohn, N., Crawford, C. J., Carmon, N., Vuyovich, C. M., and Dozier, J.: Brief communication: Not as dirty as they look, flawed airborne and satellite snow spectra, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2024-1681, 2024.
Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
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Status: open (until 05 Sep 2024)
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Leidos, Reston, VA, USA
Dar A. Roberts
University of California, Santa Barbara, CA, USA
David R. Thompson
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
Philip G. Brodrick
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
Brenton A. Wilder
Boise State University, ID, USA
Niklas Bohn
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
Chris J. Crawford
US Geological Survey, Earth Resources Observation and Science Center, SD, USA
Nimrod Carmon
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
Carrie M. Vuyovich
National Aeronautics and Space Administration, MD, USA
Jeff Dozier
University of California, Santa Barbara, CA, USA
Short summary
Key to the success of future satellite missions is understanding snowmelt in our warming climate, having implications for nearly 2 billion people. An obstacle is that an artifact, called the hook, is often mistaken for soot or dust. Instead it is caused by 3 amplifying effects: 1) a background reflectance that is too dark; 2) level terrain assumptions; 3) and differences in optical constants of ice. Sensor calibration and directional effects may also contribute. Solutions are presented.
Key to the success of future satellite missions is understanding snowmelt in our warming...