Hannu Mannerkoski 
Säteilymittarin m/Frankfurt soveltuvuus energiatasemittauksiin.
Mannerkoski H. (1978). Säteilymittarin m/Frankfurt soveltuvuus energiatasemittauksiin. Silva Fennica vol. 12 no. 3 article id 5000. https://doi.org/10.14214/sf.a14854
English title: Use of chemical totalizer of radiation in energy balance measurementsAbstract
The investigation is concerned with testing chemical totalizer of radiation (Frankfurt radiometer) for use in measuring the components of a simple energy balance (latent heat = net radiation – sensible heat) so as to gain an estimate for evaporation. The meter is based on the temperature dependence of the inversion rate of sugar solution. The relationship is exponential. It was found that radiation sums for 2–6-day periods can be reliably determined with this meter when global radiation is below 20 MJ·m-2d-1. Determining sensible heat is noticeably inaccurate, and hence the calculation of evaporation values, too. In comparing evaporation from different types of ground and plant cover one thus has to be content with drawing conclusions on the basis of net radiation values. The totalizer is therefore only suited to describing radiation conditions.
The PDF includes a summary in Finnish.
Original keywords
mittausmenetelmät;
haihdunta;
energiatase;
mittauslaitteet;
säteilymittari
English keywords
evaporation;
measuring methods;
energy balance;
measuring instrument;
net radiation
Published in 1978
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