Horizontal sighting range and Secchi depth as estimators of underwater PAR attenuation in a coastal lagoon |
| |
| Authors: | Martín?A?Montes-Hugo Email author" target="_blank">Saúl?Alvarez-BorregoEmail author Alma?D?Giles-Guzmán |
| |
| Institution: | 1.División de Oceanología,CICESE,Ensenada,México |
| |
| Abstract: | Attenuation of photosynthetically available radiation (PAR) measured using a light meter, was related to Secchi disk, horizontal
black disk and horizontal sighting ranges observed in a coastal lagoon of the Southern California Current System. Vertical
attenuation coefficient (KPAR) was calculated from radiometric PAR profiles. Vertical (ZD) and horizontal (HS) sighting ranges were measured with white (Secchi depth or ZSD, HS
W
) and black (Z
BD, HS
B
) targets. Empirical power models for the KPAR-ZSD (KPAR=1.47 ZSD
−1.13), KPAR-Z
BD (KPAR=0.98 Z
BD
−1.26), KPAR-HS
W
(KPAR=1.22 HS
W
−1.14) and KPAR-HS
B
(KPAR=0.73 HS
B
−1.07) relationships were developed. The parameters of these models may not apply to other water bodies because their values depend
on the range of water reflectance in each case, as reported in the literature. This is the first contribution reporting KPAR-HS empirical relations in an estuarine environment but their application may be limited to this coastal lagoon. While this
approach may be universal, more data are needed to explore the variability of the parameters between different water bodies. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
