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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 measurements.


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
energiatase; haihdunta; mittauslaitteet; mittausmenetelmät; säteilymittari

English keywords
energy balance; evaporation; measuring instrument; measuring methods; net radiation

Published in 1978

Available at https://doi.org/10.14214/sf.a14854 | Download PDF

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