Spatial and Temporal Distribution of Coloured Dissolved Organic Matter (CDOM) in Narragansett Bay, Rhode Island: Implications for Phytoplankton in Coastal Waters

Keith, Darryl J.; Yoder, James A.; Freeman, Scott A.

doi:10.1006/ecss.2001.0922

Cited by 97 publications

(46 citation statements)

References 31 publications

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“…In their studies, Keith et al (2002) indicated that phytoplankton utilizes accessory pigments at longer wavelengths when the CDOM absorption is high and values of S less than or equal to 0.02.…”

Section: Reversal Of Current Directionmentioning

confidence: 99%

Dynamics of chromophoric dissolved organic matter in Mandovi and Zuari estuaries — A study through in situ and satellite data

Menon

Sangekar

Lotliker

et al. 2011

ISPRS Journal of Photogrammetry and Remote Sensing

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The spatial and temporal distribution of absorption of chromophoric dissolved organic matter at 440 nm (a CDOM (440)) in Mandovi and Zuari estuaries situated along the west coast of India, has been analyzed. The study was carried out using remotely sensed data, obtained from the Ocean Colour Monitor (OCM) on board the Indian Remote Sensing satellite -P4, together with in situ data during the period January to December 2005. Satellite retrieval of CDOM absorption was carried out by applying an algorithm developed for the site. A good correlation (R = 0.98) was obtained between satellite derived CDOM and in situ data. Time series analysis revealed that spatial distribution of CDOM has a direct link with the seasonal hydrodynamics of the estuaries. The effect of remnant fresh water on CDOM distribution could be analyzed by delineating a plume in the offshore region of Zuari estuary. Though fresh water flux from terrestrial input plays a major role in the distribution of CDOM through out Mandovi estuary, its role in Zuari estuary is significant up to the middle zone.Other processes responsible for feeding CDOM in both the estuaries are coastal advection, in situ production and resuspension of bottom settled sediments. The highest value of a CDOM (440)

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Section: Reversal Of Current Directionmentioning

confidence: 99%

Dynamics of chromophoric dissolved organic matter in Mandovi and Zuari estuaries — A study through in situ and satellite data

Menon

Sangekar

Lotliker

et al. 2011

ISPRS Journal of Photogrammetry and Remote Sensing

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“…Lindell et al (2000) observaram dois picos foto-reativos de COD em lagos temperados ao longo do ano, sendo um deles relacionado com a entrada de material orgânico alóc-tone trazido pelo degelo propiciado pela primaveraverão. Consistentemente, S baixos e a MODC elevados têm sido associados a pools orgânicos cromofóricos ricos em polímeros policíclicos aromáticos, tipicamente originados de MOD alóctone (Battin 1998, Keith et al 2002, Kowalczuk et al 2003. Os valores de S, signifi cativamente menores no período úmido, reforçam dessa forma a idéia de ter havido uma importante contribuição alóctone de MOD neste período.…”

Section: Resultsunclassified

Sazonalidade Óptica Nas Águas Do Rio Paraíba Do Sul (Campos Dos Goytacazes, Rj): Referenciais Métricos Para O Monitoramento De Águas Naturais?

2008

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RESUMOEste estudo investiga em dois períodos sazonais distintos o comportamento das propriedades ópticas inerentes (POIs) da matéria orgânica dissolvida cromófora (MODC) no rio Paraíba do Sul, em Campos dos Goytacazes (RJ). Cada conjunto sazonal de dados integrou 12 amostras semanais, perfazendo um total de 24. As POIs da MODC -aqui operacionalmente referidas como variáveis ópticas -foram caracterizadas via coefi cientes de absorção (a MODC e a* MODC ) e de inclinação espectral (S), entre 280 e 700nm. A partir destas análises foram comparados os comportamentos sazonais, os quais subsidiaram a elaboração de um modelo conceitual relacionado à dinâmica da matéria orgânica dissolvida (cromófora) no ecossistema. Embora descritivo este estudo ilustra como a emergência de padrões ópticos pode contribuir para a caracterização de um ecossistema aquático, o que representa potencial interesse para o monitoramento e gestão de águas naturais. Palavras-chave: Matéria orgânica dissolvida cromófora (MODC), coefi cientes ópticos a MODC , a* MODC e S, rio Paraíba do Sul. ABSTRACT SEASONAL OPTICS IN THE PARAÍBA DO SUL RIVER WATERS (CAMPOS DOS GOYTACAZES, RJ): METRIC REFERENCES TO MONITORING NATURAL WATERS?This study investigates the spring-winter seasonal behavior of the inherent optical properties (IOPs) of chromophoric dissolved organic matter (CDOM) in the Paraíba do Sul river, at Campos dos Goytacazes (Rio de Janeiro state, Brazil). In each season 12 samples were collected weekly, resulting in 24 samples as a whole. The IOPs of CDOM -herein referred to as optical variables -were characterized through coeffi cients of absorption (a CDOM and a* CDOM ) and spectral slope (S) at 280-700nm. The results served as a template for building a conceptual model about the dynamics of chromophoric dissolved organic matter in the studied ecosystem over the seasons. Albeit descriptive the present study illustrates how emerging optical patterns can contribute to the characterization of an aquatic ecosystem, which is of potential interest for the management and monitoring of natural waters. Keywords: Chromophoric dissolved organic matter, optical coeffi cients a CDOM , a* CDOM and S, Paraíba do Sul river. INTRODUÇÃOEm águas naturais, a matéria orgânica dissolvida (MOD) constitui-se no mais abundante pool de carbono orgânico. Esta pode formar organo-complexos com nutrientes e poluentes (ex. metais pesados) e, dessa forma, afetar a solubilidade, biodisponibilidade, transporte e ciclagem de tais elementos no ambiente hídrico. A fração cromófora da matéria orgânica dissolvida (MODC), também denominada substância amarela, gelbstoff ou gilvin (Bricaud et al. 1981, Kirk 1994, atua, por sua vez, como o principal componente absorvedor de luz em ecossistemas aquáticos (Kowalczuk et al. 2003). Esta propriedade óptica tem importante implicação energética e adaptativa para os organismos aquáticos, em função dos processos fotossintéticos e dos possíveis efeitos deletérios da radiação ultravioleta aos sistemas biológicos. Do ponto de vista molecular, os cromó...

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“…where a CDOM (λ´) is the uncorrected CDOM absorption coefficient at wavelength λ; D(λ) is the optical density at The absorption coefficient was corrected for backscattering of small particles and colloids that had passed through the filters using the following equation (Bricaud et al, 1981;Green and Blough, 1994;Keith et al, 2002):…”

Section: Measurement Of Absorption Coefficientsmentioning

confidence: 99%

Study of influencing factors to chromophoric dissolved organic matter absorption properties from fluorescence features in Taihu lake in autumn

Huang

Sun

et al. 2013

J Limnol

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In order to identify the components of chromophoric dissolved organic matter (CDOM) 19.93, 18.82, 16.88, 16.39, 12.26, and 15.72%, respectively is tryptophan-like, which is the product of phytoplankton and aquatic debris rather than the wastewater treatment drainaged from city. In this study, six fluorophores with multiple excitation-emission matrices (EEMs) peaks (A, B, C, N, M, T) were identified according to the parallel factor analysis (PARAFAC). The average contribution of each component to the CDOM is

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Spatial and Temporal Distribution of Coloured Dissolved Organic Matter (CDOM) in Narragansett Bay, Rhode Island: Implications for Phytoplankton in Coastal Waters

Cited by 97 publications

References 31 publications

Dynamics of chromophoric dissolved organic matter in Mandovi and Zuari estuaries — A study through in situ and satellite data

Dynamics of chromophoric dissolved organic matter in Mandovi and Zuari estuaries — A study through in situ and satellite data

Sazonalidade Óptica Nas Águas Do Rio Paraíba Do Sul (Campos Dos Goytacazes, Rj): Referenciais Métricos Para O Monitoramento De Águas Naturais?

Study of influencing factors to chromophoric dissolved organic matter absorption properties from fluorescence features in Taihu lake in autumn

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