Correction of the Chlorophyll a Fluorescence Quenching in the Sea Upper Mixed Layer: Development of the Algorithm
Journal: Physical Oceanography
Year: 2020

Purpose. Data from the immersion fluorescence sensors of the CTD complex and BioArgo floats are widely used for studying spatial and temporal variability of the chlorophyll a concentration on large scales. In these devices the fluorescence sensors are not equipped with a dark chamber; as a result, a part of the reaction centers of photosystem 2 is closed due to the sunlight effect. It is manifested in decrease of the measured fluorescence intensity in the upper mixed layer due to fluorescence qu