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Proceedings of SPIE - The International Society for Optical Engineering. 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics 2021Moscow5 July 2021 до 9 July 2021

ISSN:0277786X

2021

Prazukin, A.V.¹

Firsov, Y.K.¹

10.1117/12.2603316

Studies were carried out on August 14, 2019, in the shallow part of the Kazachya Bay (Sevastopol, Black Sea) under cloudless sky conditions. At the selected point of the Zostera noltii Hornemann canopy, at a depth of 42 cm, with coordinates 44° 57'26" N, 33° 40'33" E, measurements of photosynthetically active radiation intensity (IPAR) were taken. During the entire period of research, the plants were in a vertical state. The Z. noltii biomass (mdry) distribution along the canopy height (z) was found to change unevenly, increasing with depth (mdry(z) = 0.0001Z3.881; R2 = 0.95), and this is reflected in the vertical distribution of IPAR. IPAR was observed to decrease with the depth of the canopy, the manner of this decrease being largely dependent on solar altitudes. The measurement results show a significant influence of the Fresnel effect on IPAR values. © 2021 SPIE

Fresnel effect, photosynthetically active radiation (PAR), seagrass, vegetation canopy, Zostera noltii

2022-02-24 15:31:26