Title :

Colored dissolved organic matter absorption at global scale from ocean color radiometry observation: Spatio-temporal variability and contribution to the absorption budget

Author(s) :

Bonelli, Ana Gabriela [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Vantrepotte, Vincent [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Jorge, Daniel Schaffer Ferreira [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Demaria, Julien [Auteur]
Jamet, Cédric [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Dessailly, David [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Mangin, Antoine [Auteur]
Fanton d'Andon, Odile [Auteur]
Kwiatkowska, Ewa [Auteur]
Loisel, Hubert [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]

Journal title :

Remote Sensing of Environment

Pages :

112637

Publication date :

2021-11

ISSN :

0034-4257

English keyword(s) :

Colored dissolved organic matter
acdom(443)
Ocean color remote sensing
Open ocean

HAL domain(s) :

Physique [physics]/Physique [physics]/Optique [physics.optics]

English abstract : [en]

A semi-analytical model (CDOM-KD2) based on the light vertical attenuation coefficient (Kd(λ)) has beendeveloped for estimating the absorption by colored dissolved organic matter, acdom(443), from ocean colorremote sensing ...
Show more >A semi-analytical model (CDOM-KD2) based on the light vertical attenuation coefficient (Kd(λ)) has beendeveloped for estimating the absorption by colored dissolved organic matter, acdom(443), from ocean colorremote sensing at global scale. The performance of this new inversion model together with that of former modelsby Shanmugam (2011) (S2011), Chen et al. (2017) (C2017) and Aurin et al. (2018) (A2018) was evaluated fromin situ and matchup validation data sets gathering worldwide distributed samples. An overall consistency in theacdom(443) estimated from S2011, C2017 and CDOM-KD2 models with a slightly better performance of the lattermethod was observed (MAPD of 27.42% and 30.85% for open ocean with in situ and satellite data, respectively),emphasizing the possible specific assessment of acdom(443) dynamics from satellite remote sensing over theglobal ocean including the most oligotrophic waters. At 443 nm the global average relative contribution ofacdom(443) to the absorption by colored detrital matter, acdm(443) is of 61% ± 14%, while the contribution ofacdom(443) to the non-water absorption, anw(443), is of 35% ± 26%. Strong spatial disparities are howeverobserved for both acdom(443) temporal dynamics and relative contribution in the absorption budget. A decou-pling is observed between acdom(443) and particulate detrital (i.e. non-living) matter and phytoplankton in thegyre areas where a low temporal variability is globally observed. This is contrasting with water masses influ-enced by terrestrial inputs as well as in equatorial and subtropical areas impacted by main oceanic currentswhere CDOM loads and acdom(443) contribution in the water absorption budget are more variable.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL