Net Radiometer
Measure net shortwave and net longwave radiation
A net radiometer measures the difference between incoming and outgoing radiation (both shortwave and longwave components), in W m-2
. The CNR 2 net radiometer (manufactured by Kipp & Zonen) measures net shortwave and net longwave radiation separately via individual shortwave and longwave sensors. The shortwave and longwave sensors each have upward and downward facing radiation detectors; the two shortwave signals from the detectors are combined, as are the two longwave radiation signals. As a result, there are two outputs, one proportional to net shortwave radiation and the other proportional to net longwave radiation. The calibration of both shortwave and longwave is traceable to the world radiation references in Davos, Switzerland. CNR 2 net radiometer performance was tested relative to multiple net radiometer models in a recent study*; replicate CNR 2 net radiometers were highly accurate under the conditions of the study.
CNR 2 net radiometers feature a compact, lightweight design that facilitates mounting.
Applications include net radiation measurement in surface energy balance studies, particularly water and carbon cycling studies in:
• agriculture • ecology • hydrology • biogeochemistry
*Blonquist Jr., J.M., B. Bugbee, and B.D. Tanner, 2009. Evaluation of measurement accuracy and comparison of two new and three traditional net radiometers. Agricultural and Forest Meteorology 149:1709-1721.
Related Product
SP Series A pyranometer is another option to verify shortwave radiation.
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