Coronavirus Information for the UC San Diego Community

Our leaders are working closely with federal and state officials to ensure your ongoing safety at the university. Stay up to date with the latest developments. Learn more.

Monte Carlo study of UAV-measurable albedo over Arctic Sea ice

TitleMonte Carlo study of UAV-measurable albedo over Arctic Sea ice
Publication TypeJournal Article
Year of Publication2018
AuthorsPodgorny I., Lubin D., Perovich D.K
JournalJournal of Atmospheric and Oceanic Technology
Volume35
Pagination57-66
Date Published2018/01
Type of ArticleArticle
ISBN Number0739-0572
Accession NumberWOS:000425445600004
Keywordscoastline; Engineering; fluxes; Meteorology & Atmospheric Sciences; model; ocean; optical-properties; radiative-transfer
Abstract

In anticipation that unmanned aerial vehicles (UAVs) will have a useful role in atmospheric energy budget studies over sea ice, a Monte Carlo model is used to investigate three-dimensional radiative transfer over a highly inhomogeneous surface albedo involving open water, sea ice, and melt ponds. The model simulates the spatial variability in 550-nm downwelling irradiance and albedo that a UAV would measure above this surface and underneath an optically thick, horizontally homogeneous cloud. At flight altitudes higher than 100 m above the surface, an airborne radiometer will sample irradiances that are greatly smoothed horizontally as a result of photon multiple reflection. If one is interested in sampling the local energy budget contrasts between specific surface types, then the UAV must fly at a low altitude, typically within 20 m of the surface. Spatial upwelling irradiance variability in larger open water features, on the order of 1000 m wide, will remain apparent as high as 500 m above the surface. To fully investigate the impact of surface feature variability on the energy budget of the lower troposphere ice-ocean system, a UAV needs to fly at a variety of altitudes to determine how individual features contribute to the area-average albedo.

DOI10.1175/jtech-d-17-0066.1
Short TitleJ. Atmos. Ocean. Technol.
Student Publication: 
No
sharknado