Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

Publications des scientifiques de l'IRD

Favareto L. R., Rudorff N., Kampel M., Frouin R., Rottgers R., Doxaran D., Murakami H., Dupouy Cécile. (2018). Bio-optical characterization and ocean colour inversion in the Eastern Lagoon of New Caledonia, South Tropical Pacific. Remote Sensing, 10 (7), art. 1043 [30 p.]. ISSN 2072-4292

Fichier PDF disponible http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-09/010073745.pdf

Lien direct chez l'éditeur doi:10.3390/rs10071043

Titre
Bio-optical characterization and ocean colour inversion in the Eastern Lagoon of New Caledonia, South Tropical Pacific
Année de publication2018
Type de documentArticle référencé dans le Web of Science WOS:000440332500066
AuteursFavareto L. R., Rudorff N., Kampel M., Frouin R., Rottgers R., Doxaran D., Murakami H., Dupouy Cécile.
SourceRemote Sensing, 2018, 10 (7), p. art. 1043 [30 p.]. p. art. 1043 [30 p.] ISSN 2072-4292
RésuméThe Eastern Lagoon of New Caledonia (ELNC) is a semi-enclosed system surrounded by an extensive coral reef barrier. The system has been suffering impacts from climate variability and anthropogenic activities, including mining exploitation. Satellite monitoring is thus an essential tool to detect such changes. The present study aimed to assess the bio-optical variability of the ELNC and examine the applicability of ocean colour algorithms, using in situ bio-optical and radiometric data, collected during the March 2014 CALIOPE 2 cruise. The chlorophyll a concentration (Chla) varied from 0.13-0.72 mg.m(-3), and the coastal stations were spectrally dominated by non-algal particles (NAP) and coloured dissolved organic matter (CDOM) (>80% of the total non-water absorption at 443 nm), due to the contribution of allochthonous sources. The phytoplankton specific absorption was generally lower (mean, 0.049 m(2).mg Chla(-1)) than typical values observed for the corresponding Chla range, as well as the spectral slopes of the absorption of CDOM plus NAP (a(dg)) (mean, 0.016 nm(-1)) and of the particle backscattering coefficient (b(bp)) (mean, 0.07 nm(-1)). The remote sensing reflectance obtained using two in-water approaches and modelled from Inherent Optical Properties (IOPs) showed less than 20% relative percent differences (RPD). Chla estimates were highly biased for the empirical (OC4 and OC3) and semi-analytical (GSM, QAA, GIOP, LMI) algorithms, especially at the coastal stations. Excluding these stations, the GSM01 yielded the best retrievals with 35-40% RPD. a(dg)(443) was well retrieved by all algorithms with similar to 18% RPD, and b(bp)(443) with similar to 40% RPD. Turbidity algorithms also performed reasonably well (30% RPD), showing the capacity and usefulness of the derived products to monitor the water quality of the ELNC, provided accurate atmospheric correction of the satellite data. Regionally tuned algorithms may potentially improve the Chla retrievals, but better parameterization schemes that consider the spatiotemporal variability of the specific IOPs are still needed.
Plan de classementLimnologie physique / Océanographie physique [032] ; Ecologie, systèmes aquatiques [036] ; Télédétection [126]
Descr. géo.NOUVELLE CALEDONIE ; PACIFIQUE SUD OUEST ; ZONE TROPICALE
LocalisationFonds IRD [F B010073745]
Identifiant IRDfdi:010073745
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010073745

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Nouméa

Papeete

Niamey

Ouagadougou

Tunis

La Paz

Quito