A New Technique to Estimate Sensible Heat Fluxes around Micrometeorological Towers using Small Unmanned Aircraft Systems

A New Technique to Estimate Sensible Heat Fluxes around Micrometeorological Towers using Small... AbstractUpscaling point measurements from micrometeorological towers is a challenging task that is important for a variety of applications, for example in process studies of convection initiation, carbon and energy budget studies, and the improvement of model parameterizations. In the present study, we developed a technique to determine the horizontal variability in sensible heat flux (H) surrounding micrometeorological towers. We then evaluated the technique using 15 min flux observations, as well as measurements of land surface temperature and air temperature obtained from small Unmanned Aircraft Systems (sUAS) conducted during a one-day measurement campaign. H computed using this technique was comparable to the micrometeorological measurements to within 5-10 W m−2. Furthermore, when comparing H computed using this technique with H determined using large eddy simulations (LES), we found that differences were typically <10 W m−2. Thus, implementing our technique using observations from sUAS will help determine sensible heat flux variability at horizontal spatial scales larger than can be provided from flux tower measurements alone. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Atmospheric and Oceanic Technology American Meteorological Society

A New Technique to Estimate Sensible Heat Fluxes around Micrometeorological Towers using Small Unmanned Aircraft Systems

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0426
D.O.I.
10.1175/JTECH-D-17-0065.1
Publisher site
See Article on Publisher Site

Abstract

AbstractUpscaling point measurements from micrometeorological towers is a challenging task that is important for a variety of applications, for example in process studies of convection initiation, carbon and energy budget studies, and the improvement of model parameterizations. In the present study, we developed a technique to determine the horizontal variability in sensible heat flux (H) surrounding micrometeorological towers. We then evaluated the technique using 15 min flux observations, as well as measurements of land surface temperature and air temperature obtained from small Unmanned Aircraft Systems (sUAS) conducted during a one-day measurement campaign. H computed using this technique was comparable to the micrometeorological measurements to within 5-10 W m−2. Furthermore, when comparing H computed using this technique with H determined using large eddy simulations (LES), we found that differences were typically <10 W m−2. Thus, implementing our technique using observations from sUAS will help determine sensible heat flux variability at horizontal spatial scales larger than can be provided from flux tower measurements alone.

Journal

Journal of Atmospheric and Oceanic TechnologyAmerican Meteorological Society

Published: Aug 3, 2017

References

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