In situ variability of mass‐specific beam attenuation and backscattering of marine particles with respect to particle size, density, and composition

Neukermans, Griet; Loisel, Hubert; Mériaux, Xavier; Astoreca, Rosa; McKee, David

doi:10.4319/lo.2012.57.1.0124

Cited by 181 publications

(212 citation statements)

References 82 publications

Supporting

Mentioning

179

Contrasting

Order By: Relevance

“…The variability in mass specific optical properties, when compared across studies, has been found to be constrained within ±50% despite some variability in the analytical methods used to obtain mass (Boss et al, 2009c;Cetinic et al, 2012;Hill et al, 2011;Neukermans et al, 2012) and large variability in the environments sampled. Note that in all these studies measurements have been done using red or near-infra-red wavelengths (650 nm < k < 880 nm) to minimize the effect of dissolved substance absorption on the attenuation coefficient, as well as to minimize the effect of particulate absorption on the scattering coefficient.…”

Section: Commercial Technology To Measure Optical Properties In-situmentioning

confidence: 99%

“…Remote sensing requirements and the need to understand coastal and near bottom processes, stimulated the development of PM/POC -backscattering proxies (Boss et al, 2009c;Cetinic et al, 2012;Neukermans et al, 2012;Stramski et al, 1999). The availability of relatively cheap and large-depth capable side-scattering (turbidity) sensors encouraged studies relating side-scattering and POC or PM (Baker et al, 2001;Bishop and Wood, 2008;Boss et al, 2009c;Bishop et al, 2012;Cetinic et al, 2012).…”

Section: Commercial Technology To Measure Optical Properties In-situmentioning

confidence: 99%

“…The introduction of the first commercial transmissometers spawned the investigation of PM and particulate organic carbon concentration (POC) relationships with beam attenuation coefficient (Bishop, 1986(Bishop, , 1999Bishop et al, 1999Bishop et al, , 1992Bishop and Joyce, 1986;Bishop and Wood, 2008;Cetinic et al, 2012;Gardner, 1989a;Gardner et al, 1985Gardner et al, , 2003Gardner et al, , 1993Hill et al, 2011;Karageorgis et al, 2008Karageorgis et al, , 2014Neukermans et al, 2012). The beam attenuation coefficient was found to be a better proxy for POC than for PM for waters dominated by biogenic particles, having a smaller intercept and a significantly higher correlation coefficient (Bishop, 1999;Gardner et al, 2003).…”

Section: Commercial Technology To Measure Optical Properties In-situmentioning

confidence: 99%

“…Nonetheless several studies have used them in the upper ocean with success (Neukermans et al, 2012;Reynolds et al, 2010).…”

Section: Multiple Angle Scatteringmentioning

confidence: 99%

See 3 more Smart Citations

Optical techniques for remote and in-situ characterization of particles pertinent to GEOTRACES

Boss

Guidi

Richardson

et al. 2015

Progress in Oceanography

View full text Add to dashboard Cite

a b s t r a c tField and laboratory characterization of marine particles is laborious and expensive. Proxies of particle properties have been developed that allow researchers to obtain high frequency distributions of such properties in space or time. We focus on optical techniques used to characterize marine particles in-situ, with a focus on GEOTRACES-relevant properties, such as bulk properties including particle mass, crosssectional area, particle size distribution, particle shape information, and also single particle optical properties, such as individual particle type and size. We also address the use of optical properties of particles to infer particulate organic or inorganic carbon. In addition to optical sensors we review advances in imaging technology and its use to study marine particles in situ. This review addresses commercially available technology and techniques that can be used as a proxy for particle properties and the associated uncertainties with particular focus to open ocean environments, the focus of GEOTRACES.

show abstract

Section: Commercial Technology To Measure Optical Properties In-situmentioning

confidence: 99%

Section: Commercial Technology To Measure Optical Properties In-situmentioning

confidence: 99%

Section: Commercial Technology To Measure Optical Properties In-situmentioning

confidence: 99%

“…Nonetheless several studies have used them in the upper ocean with success (Neukermans et al, 2012;Reynolds et al, 2010).…”

Section: Multiple Angle Scatteringmentioning

confidence: 99%

See 2 more Smart Citations

Optical techniques for remote and in-situ characterization of particles pertinent to GEOTRACES

Boss

Guidi

Richardson

et al. 2015

Progress in Oceanography

View full text Add to dashboard Cite

show abstract

“…This Wetlabs ECO-BB2FL sensor measures light backscattering at 117˝at the fixed wavelength of 700 nm (β 117 (700) in sr´1¨m´1) as well as chlorophyll fluorescence at a sample rate of 15 minutes (Figure 2). The measured β 117 (700) data (in sr´1¨m´1) was converted into the particulate backscattering coefficient (b bp (700), in m´1) which is a robust proxy of the SPM concentration [8, 29,31]. The b bp (700) coefficient was obtained through the formula b bp (700) = 2πˆ1.1ˆβ p117 (700) [29], with β p117 (700) = β 117 (700) -β w117 (700)~β 117 (700), as the water light backscaterring (β w117 (700)~10´5) is negligible compared to particulate light backscattering signal (β p117 (700)~10´2) in turbid waters.…”

Section: Autonomous Field Measurementsmentioning

confidence: 99%

Potential of High Spatial and Temporal Ocean Color Satellite Data to Study the Dynamics of Suspended Particles in a Micro-Tidal River Plume

et al. 2016

View full text Add to dashboard Cite

Ocean color satellite sensors are powerful tools to study and monitor the dynamics of suspended particulate matter (SPM) discharged by rivers in coastal waters. In this study, we test the capabilities of Landsat-8/Operational Land Imager (OLI), AQUA&TERRA/Moderate Resolution Imaging Spectroradiometer (MODIS) and MSG-3/Spinning Enhanced Visible and Infrared Imager (SEVIRI) sensors in terms of spectral, spatial and temporal resolutions to (i) estimate the seawater reflectance signal and then SPM concentrations and (ii) monitor the dynamics of SPM in the Rhône River plume characterized by moderately turbid surface waters in a micro-tidal sea. Consistent remote-sensing reflectance (Rrs) values are retrieved in the red spectral bands of these four satellite sensors (median relative difference less than~16% in turbid waters). By applying a regional algorithm developed from in situ data, these Rrs are used to estimate SPM concentrations in the Rhône river plume. The spatial resolution of OLI provides a detailed mapping of the SPM concentration from the downstream part of the river itself to the plume offshore limits with well defined small-scale turbidity features. Despite the low temporal resolution of OLI, this should allow to better understand the transport of terrestrial particles from rivers to the coastal ocean. These details are partly lost using MODIS coarser resolutions data but SPM concentration estimations are consistent, with an accuracy of about 1 to 3 g¨m´3 in the river mouth and plume for spatial resolutions from 250 m to 1 km. The MODIS temporal resolution (2 images per day) allows to capture the daily to monthly dynamics of the river plume. However, despite its micro-tidal environment, the Rhône River plume shows significant short-term (hourly) variations, mainly controlled by wind and regional circulation, that MODIS temporal resolution failed to capture. On the contrary, the high temporal resolution of SEVIRI makes it a powerful tool to study this hourly river plume dynamics. However, its coarse resolution prevents the monitoring of SPM concentration variations in the river mouth where SPM concentration variability can reach 20 g¨m´3 inside the SEVIRI pixel. Its spatial resolution is nevertheless sufficient to reproduce the plume shape and retrieve SPM concentrations in a valid range, taking into account an underestimation of about 15%-20% based on comparisons with other sensors and in situ data. Finally, the capabilities, advantages and limits of these satellite sensors are discussed in the light of the spatial and temporal resolution improvements provided by the new and future generation

show abstract

Characterization and variability of particle size distributions in Hudson Bay, Canada

Larouche

Tang

et al. 2014

JGR Oceans

View full text Add to dashboard Cite

Particle size distribution (PSD) plays a significant role in many aspects of aquatic ecosystems, including phytoplankton dynamics, sediment fluxes, and optical scattering from particulates. As of yet, little is known on the variability of particle size distribution in marine ecosystems. In this study, we investigated the PSD properties and variability in Hudson Bay based on measurements from a laser diffractometer (LISST-100X Type-B) in concert with biogeochemical parameters collected during summer 2010. Results show that most power-law fitted PSD slopes ranged from 2.5 to 4.5, covering nearly the entire range observed for natural waters. Offshore waters showed a predominance of smaller particles while near the coast, the effect of riverine inputs on PSD were apparent. Particulate inorganic matter contributed more to total suspended matter in coastal waters leading to lower PSD slopes than offshore. The depth distribution of PSD slopes shows that larger particles were associated with the pycnocline. Below the pycnocline, smaller particles dominated the spectra. A comparison between a PSD slope-based method to derive phytoplankton size class (PSC) and pigment-based derived PSC showed the two methods agreed relatively well. This study provides valuable baseline information on particle size properties and phytoplankton composition estimates in a sub-arctic environment subject to rapid environmental change.

show abstract

In situ variability of mass‐specific beam attenuation and backscattering of marine particles with respect to particle size, density, and composition

Cited by 181 publications

References 82 publications

Optical techniques for remote and in-situ characterization of particles pertinent to GEOTRACES

Optical techniques for remote and in-situ characterization of particles pertinent to GEOTRACES

Potential of High Spatial and Temporal Ocean Color Satellite Data to Study the Dynamics of Suspended Particles in a Micro-Tidal River Plume

Characterization and variability of particle size distributions in Hudson Bay, Canada

Contact Info

Product

Resources

About