Spatial Variability of Albedo and Net Radiation at Local Scale Using UAV Equipped with Radiation Sensors
نویسندگان
چکیده
Energy balance closure is an important feature in studies of ecosystem exchanges energy and greenhouse gases using the eddy covariance method. Previous analyses show that this still a problem with imbalances order 0.6–0.7 to full (for only few sites). It has been suggested mesoscale transport processes are not captured by measurements main reason behind problem. So far, very little action taken investigate another potential cause problem, namely, role spatial variation net radiation at scale typical flux footprints. The for knowledge gap mainly due lack suitable methods perform such investigations. Here, we can be performed unmanned aerial vehicle equipped sensors. A comparison reference radiometer on fixed mast hovering UAV pyranometers incoming outgoing shortwave infrared thermometer surface temperature shows measured standard error 7.4 Wm−2 1.8 Wm−2, respectively. An application system was made over five-year-old forest site Sweden. longwave estimated from calculated radiation. results during mission around noon clear day, distinct ‘hotspots’ existed plantation albedo varying between 15.5 17.9%, 22.2 25.5 °C 330 380 Wm−2. These variations large enough have significant impact Our conclusion now tools variability regime sites should given more attention future.
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ژورنال
عنوان ژورنال: Drones
سال: 2023
ISSN: ['2504-446X']
DOI: https://doi.org/10.3390/drones7040276