Shade estimation over streams using distributed temperature sensing

The characterization of temporal and spatial distribution of sunlight is essential for understanding energy transport in natural ecosystems. Fiber‐optic distributed temperature sensing (DTS) allows meter resolution measurements of temperature at subminute resolution. The difference in temperature du...

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Bibliographic Details
Published in:Water resources research 2011-07, Vol.47 (7), p.n/a
Main Authors: Petrides, A. C., Huff, J., Arik, A., van de Giesen, N., Kennedy, A. M., Thomas, C. K., Selker, J. S.
Format: Article
Language:English
Subjects:
Budgets
Cables
Creeks & streams
DTS
effective shade
Energy
Experiments
Fiber optics
fiber-optic
Hydrology
Radiation
Scientific apparatus & instruments
shade
shade over streams
Solar radiation
Spatial distribution
Sunlight
Temperature
Temperature measurement
Vegetation
Water
Wind
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Summary:The characterization of temporal and spatial distribution of sunlight is essential for understanding energy transport in natural ecosystems. Fiber‐optic distributed temperature sensing (DTS) allows meter resolution measurements of temperature at subminute resolution. The difference in temperature due to absorption and reflection of a pair of helically twisted black and white fiber‐optic cables was measured with a DTS to document areas exposed to sunlight over the Walla Walla River. A high correlation (R2 = 0.99) was found between DTS‐based results and manual field observations of effective shade. These preliminary results provide proof of the concept that this method can be used for estimating the effective shade at fine spatial resolutions. Potential shortcomings and the need for a more quantitative physical model are suggested for further research. Key Points Exposure to solar radiation can be estimated using the temperature difference Potential shortcomings of this method Effective shade can be measured at fine spatial and temporal resolutions
ISSN:0043-1397
1944-7973
DOI:10.1029/2010WR009482