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Colors of thermal pools at Yellowstone National Park

  • Abstract The brilliant visible colors of various hot springs and pools in Yellowstone National Park are explained with a combination of scattering from the water and from microbial mats that coat the bottoms of these thermal features. A simple 1D radiative transfer model was used to simulate the colors recorded in visible photographs and the spectrum of light making up these colors. The model includes attenuation in water by absorption and molecular scattering as well as reflectionAbstract The brilliant visible colors of various hot springs and pools in Yellowstone National Park are explained with a combination of scattering from the water and from microbial mats that coat the bottoms of these thermal features. A simple 1D radiative transfer model was used to simulate the colors recorded in visible photographs and the spectrum of light making up these colors. The model includes attenuation in water by absorption and molecular scattering as well as reflection characteristics of the microbial mats and surface reflection of the water. Pool geometries are simulated as simple rough cones scaled to have depths and widths that match published data. Thermal images are also used to record the spatial distribution of water skin temperature. The measurements and simulations confirm that colors observed from shallow-water features arise primarily from the spectral properties of the microbial mat, which is related to the water temperature, while colors observed from deeper water arise primarily from the wavelength-dependent absorption and scattering in the water.show moreshow less

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Metadaten
Author:Paul W. Nugent, Joseph A. Shaw, Michael VollmerGND
DOI:https://doi.org/10.1364/AO.54.00B128
Parent Title (English):Applied Optics Vol. 54 (2015 ) 4, pp. B128-B139
Document Type:Article
Language:English
Year of Publishing:2015
Date of Publication (online):2015/12/15
Release Date:2015/12/15
First Page:B128
Last Page:B139
Institutes:Fachbereich Technik
Dewey Decimal Classification:Naturwissenschaften und Mathematik / Physik / Physik
University Bibliography:Hochschulbibliografie
Licence (German):Creative Commons - Namensnennung, Nicht kommerziell, Keine Bearbeitung
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