
TY  - JOUR
A1  - Jitts, HR 
T1  - The Simulated <I>in situ</I> Measurements of Oceanic Primary Production
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1963
VL  - 14
IS  - 2
SP  - 139
EP  - 147
KW  - 
UR  - https://doi.org/10.1071/MF9630139 
N2  - Simultaneous measurements with two types of incubators were made on replicate samples both in the incubators and in situ in the ocean. Both incubators used sunlight and blue glass filters to simulate light conditions at depths in the ocean. The first gave measurements of column production 1.58 times those in situ. This was due to the fact that at depths greater than 20 m the incubator gave much higher results with no significant relation to those measured in situ. In the second incubator the accuracy of reproduction of oceanic light conditions was improved by reducing reflected light and using a balance-by-depth twin photometer system for determining the depths of sampling. The measurements of column production in the second incubator were 1.03 times the in situ values. 
ER  -

