COMPARISON OF MEASUREMENT OF PHOTOSYNTETICALLY ACTIVE RADIATION (PAR) DIRECTLY AND INDIRECTLY IN A SHORT PERIOD AT SPAG BUKIT KOTOTABANG

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Published:

Mar 25, 2015

DOI:

https://doi.org/10.46824/8vnyj511

Keywords:

UV, NIR, PAR, Bukit Kototabang

 

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Agusta Kurniawan
BMKG

Abstract

This study was conducted to compare the results of measurement of PAR (Photosyntetically Active Radiation) between the direct and the indirect method in the Global Atmospheric Watch (GAW) Bukit Kototabang Station. Direct measurements was performed by PAR Radiometer sensor which is one of instrumentation AAWS (Agroclimate Automatic wheather Station). Indirect measurement using empirical equations which are output of the three instruments, namely QPSP-Eppley Pyranometer (IGlo), RG58-Eppley Pyranometer (INIR) and Total  UV  Radiometer  (ITUV).  The  magnitude  of  the  intensity  of  PAR  (IPAR)  empirically defined IPAR  = IGlo- (INIR  + ITUV). The comparison showed that the results of the calculation (indirect measurement) higher than the results of observations (direct measurement)

Article Details

Issue
Vol. 6 No. 1 (2015): Vol 6 No 1 (2019)
Section
Article
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