Hubert Loisel
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View article: Remote sensing monitoring of the spatio-temporal dynamics of the marine carbon polls of the global coastal ocean over the two last decades
Remote sensing monitoring of the spatio-temporal dynamics of the marine carbon polls of the global coastal ocean over the two last decades Open
The increase of atmospheric CO2 levels by as much as about 10% since the beginning of 21st century and its impact on the Earth’s climate and the biosphere represent a major concern. Based on a compilation of in situ data extrapolated over …
View article: Estimating and Monitoring Dissolved Organic Carbon (DOC) Concentrations from Space across the Global Ocean
Estimating and Monitoring Dissolved Organic Carbon (DOC) Concentrations from Space across the Global Ocean Open
Effective monitoring of Dissolved Organic Carbon (DOC) from space is crucial for tracking carbon stocks and understanding fluctuations in both coastal and open ocean environments. As part of the OCROC project, founded by the Copernicus Mar…
View article: Contribution of Ocean Color Remote Sensing for Monitoring the Response of Coastal Ecosystems to Anthropogenic Impacts: A Case Study on Brazilian Waters
Contribution of Ocean Color Remote Sensing for Monitoring the Response of Coastal Ecosystems to Anthropogenic Impacts: A Case Study on Brazilian Waters Open
Coastal ecosystems play essential ecological, social, and economic roles at the land-ocean interface and are highly sensitive to environmental changes, whether natural or human-induced. Monitoring these regions is crucial for developing su…
View article: An Empirical Algorithm for Estimating the Absorption of Colored Dissolved Organic Matter from Sentinel-2 (MSI) and Landsat-8 (OLI) Observations of Coastal Waters
An Empirical Algorithm for Estimating the Absorption of Colored Dissolved Organic Matter from Sentinel-2 (MSI) and Landsat-8 (OLI) Observations of Coastal Waters Open
Sentinel-2/MSI and Landsat-8/OLI sensors enable the mapping of ocean color-related bio-optical parameters of surface coastal and inland waters. While many algorithms have been developed to estimate the Chlorophyll-a concentration, Chl-a, a…
View article: Comparison of ocean-colour algorithms for particulate organic carbon in global ocean
Comparison of ocean-colour algorithms for particulate organic carbon in global ocean Open
In the oceanic surface layer, particulate organic carbon (POC) constitutes the biggest pool of particulate material of biological origin, encompassing phytoplankton, zooplankton, bacteria, and organic detritus. POC is of general interest i…
View article: New ocean color algorithms for estimating the concentration of particulate organic nitrogen from remote sensing in oceanic surface waters
New ocean color algorithms for estimating the concentration of particulate organic nitrogen from remote sensing in oceanic surface waters Open
The concentration of particulate organic nitrogen (PON) in seawater plays a central role in ocean biogeochemistry. Limited availability of PON data obtained directly from in situ sampling methods hinders our ability to better characterize …
View article: Linking satellites to genes with machine learning to estimate phytoplankton community structure from space
Linking satellites to genes with machine learning to estimate phytoplankton community structure from space Open
Ocean color remote sensing has been used for more than 2 decades to estimate primary productivity. Approaches have also been developed to disentangle phytoplankton community structure based on spectral data from space, in particular when c…
View article: Optical water characterization and atmospheric correction assessment of estuarine and coastal waters around the AERONET-OC Bahia Blanca
Optical water characterization and atmospheric correction assessment of estuarine and coastal waters around the AERONET-OC Bahia Blanca Open
The site AERONET-OC Bahía Blanca (BB-AERONET-OC) is located at the mouth of the Bahía Blanca Estuary, Argentina (Southwestern Atlantic Ocean), a coastal system defined by its high suspended loads and relatively low colored dissolved organi…
View article: Characterization of the organic vs. inorganic fraction of suspended particulate matter in coastal waters based on ocean color radiometry remote sensing
Characterization of the organic vs. inorganic fraction of suspended particulate matter in coastal waters based on ocean color radiometry remote sensing Open
Knowledge of the organic and inorganic particulate fraction of suspended material in coastal waters is essential for the study of particle dynamics and biogeochemical cycles in these complex and highly variable environments. Thanks to the …
View article: Reply on RC2
Reply on RC2 Open
Abstract. Radiative transfer (RT) simulations have long been used to study relationships between the inherent optical properties (IOPs) of seawater and light fields within and leaving the ocean from which the ocean apparent optical propert…
View article: Reply on RC3
Reply on RC3 Open
Abstract. Radiative transfer (RT) simulations have long been used to study relationships between the inherent optical properties (IOPs) of seawater and light fields within and leaving the ocean from which the ocean apparent optical propert…
View article: Reply on RC1
Reply on RC1 Open
Abstract. Radiative transfer (RT) simulations have long been used to study relationships between the inherent optical properties (IOPs) of seawater and light fields within and leaving the ocean from which the ocean apparent optical propert…
View article: Comment on essd-2023-80
Comment on essd-2023-80 Open
Abstract. Radiative transfer (RT) simulations have long been used to study relationships between the inherent optical properties (IOPs) of seawater and light fields within and leaving the ocean from which the ocean apparent optical propert…
View article: Band Ratios Combination for Estimating Chlorophyll-a from Sentinel-2 and Sentinel-3 in Coastal Waters
Band Ratios Combination for Estimating Chlorophyll-a from Sentinel-2 and Sentinel-3 in Coastal Waters Open
Chlorophyll-a concentration (Chl-a) is a crucial parameter for monitoring the water quality in coastal waters. The principal aim of this study is to evaluate the performance of existing Chl-a band ratio inversion models for estimating Chl-…
View article: Estimation of the spectral diffuse attenuation coefficient Kd(λ) from UV to NIR using ocean color images: Application from SeaWiFS to PACE
Estimation of the spectral diffuse attenuation coefficient Kd(λ) from UV to NIR using ocean color images: Application from SeaWiFS to PACE Open
The fine-scale study of the diffuse attenuation coefficient, Kd(l), of the spectral solar downward irradiance  is only feasible by ocean color remote sensing. Several empirical and semi-analytical methods exist. However, most of these…
View article: A compilation of global bio-optical in situ data for ocean colour satellite applications – version three
A compilation of global bio-optical in situ data for ocean colour satellite applications – version three Open
A global in situ data set for validation of ocean colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, starting in 1997, now extends to 2021, which is important for the…
View article: Characterization of the organic vs. inorganic fraction of suspended particulate matter in coastal waters based on ocean color radiometry remote sensing
Characterization of the organic vs. inorganic fraction of suspended particulate matter in coastal waters based on ocean color radiometry remote sensing Open
Knowledge of the organic and inorganic particulate fractions of suspended material in coastal waters is essential for the study of particle dynamics and biogeochemical cycles in these complex and highly variable environments. Thanks to the…
View article: Characterising retrieval uncertainty of chlorophyll-a algorithms in oligotrophic and mesotrophic lakes and reservoirs
Characterising retrieval uncertainty of chlorophyll-a algorithms in oligotrophic and mesotrophic lakes and reservoirs Open
Carbon capture and storage is a key mitigation strategy proposed for keeping the global temperature rise below
\n1.5 ◦C. Offshore storage can provide up to 13% of the global CO2 reduction required to achieve the Intergovernmental Panel on…
View article: A compilation of global bio-optical in situ data for ocean-colour satellite applications – version three
A compilation of global bio-optical in situ data for ocean-colour satellite applications – version three Open
A global in-situ data set for validation of ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, starting in 1997, now extends to 2021, which is important for the…
View article: Biological production in two contrasted regions of the Mediterranean Sea during the oligotrophic period: an estimate based on the diel cycle of optical properties measured by BioGeoChemical-Argo profiling floats
Biological production in two contrasted regions of the Mediterranean Sea during the oligotrophic period: an estimate based on the diel cycle of optical properties measured by BioGeoChemical-Argo profiling floats Open
This study assesses marine community production based on the diel variability of bio-optical properties monitored by two BioGeoChemical-Argo (BGC-Argo) floats. Experiments were conducted in two distinct Mediterranean systems, the northwest…
View article: Simultaneous retrieval of selected optical water quality indicators from Landsat-8, Sentinel-2, and Sentinel-3
Simultaneous retrieval of selected optical water quality indicators from Landsat-8, Sentinel-2, and Sentinel-3 Open
Constructing multi-source satellite-derived water quality (WQ) products in inland and nearshore coastal waters from the past, present, and future missions is a long-standing challenge. Despite inherent differences in sensors’ spectral capa…
View article: A three-step semi analytical algorithm (3SAA) for estimating inherent optical properties over oceanic, coastal, and inland waters from remote sensing reflectance
A three-step semi analytical algorithm (3SAA) for estimating inherent optical properties over oceanic, coastal, and inland waters from remote sensing reflectance Open
We present a three-step inverse model (3SAA) for estimating the inherent optical properties (IOPs) of surface waters from the remote sensing reflectance spectra, Rrs(λ). The derived IOPs include the total (a(λ)), phytoplankton (aphy(λ)), a…
View article: Comment on bg-2021-123
Comment on bg-2021-123 Open
Abstract. This study assesses marine community production based on the diel variability of bio-optical properties monitored by two BioGeoChemical-Argo (BGC-Argo) floats. Experiments were conducted in two distinct Mediterranean systems, the…
View article: Biological production in two contrasted regions of the Mediterranean Sea during the oligotrophic period: An estimate based on the diel cycle of optical properties measured by BGC-Argo profiling floats
Biological production in two contrasted regions of the Mediterranean Sea during the oligotrophic period: An estimate based on the diel cycle of optical properties measured by BGC-Argo profiling floats Open
This study assesses marine biological production of organic carbon based on the diel variability of bio-optical properties monitored by two BioGeoChemical-Argo (BGC-Argo) floats. Experiments were conducted in two distinct Mediterranean sys…
View article: A Simple Empirical Band-Ratio Algorithm to Assess Suspended Particulate Matter from Remote Sensing over Coastal and Inland Waters of Vietnam: Application to the VNREDSat-1/NAOMI Sensor
A Simple Empirical Band-Ratio Algorithm to Assess Suspended Particulate Matter from Remote Sensing over Coastal and Inland Waters of Vietnam: Application to the VNREDSat-1/NAOMI Sensor Open
VNREDSat-1 is the first Vietnamese satellite enabling the survey of environmental parameters, such as vegetation and water coverages or surface water quality at medium spatial resolution (from 2.5 to 10 m depending on the considered channe…
View article: A Simple Band-ratio Algorithm to Assess Suspended Particulate Matter from Remote Sensing Over Coastal and Inland Waters of Vietnam: Application to the VNREDSat-1/NAOMI Sensor
A Simple Band-ratio Algorithm to Assess Suspended Particulate Matter from Remote Sensing Over Coastal and Inland Waters of Vietnam: Application to the VNREDSat-1/NAOMI Sensor Open
VNREDSat-1 is the first Vietnamese satellite allowing the survey of environmental parameters such as vegetation and water coverages, or surface water quality at medium spatial resolution (from 2.5 to 10 meters depending on the considered c…
View article: Towards the estimation of DOC from space in the open ocean
Towards the estimation of DOC from space in the open ocean Open
<p>The Dissolved Organic Carbon (DOC) represents the largest pool of organic carbon and the most active carbon compartment in the ocean. Describing the spatio-temporal dynamics of the oceanic DOC in response to variation in the physi…