Thematische Bibliographien / BGC-Argo profiling floats

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Auswahl der wissenschaftlichen Literatur zum Thema „BGC-Argo profiling floats“

Autor: Grafiati

Veröffentlicht am 25. Mai 2024

Zuletzt aktualisiert am 31. Juli 2025

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Zeitschriftenartikel zum Thema "BGC-Argo profiling floats"

Begouen Demeaux, Charlotte, and Emmanuel Boss. "Validation of Remote-Sensing Algorithms for Diffuse Attenuation of Downward Irradiance Using BGC-Argo Floats." Remote Sensing 14, no. 18 (2022): 4500. http://dx.doi.org/10.3390/rs14184500.

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Estimates of the diffuse attenuation coefficient (Kd) at two different wavelengths and band-integrated (PAR) were obtained using different published algorithms developed for open ocean waters spanning in type from explicit-empirical, semi-analytical and implicit-empirical and applied to data from spectral radiometers on board six different satellites (MODIS-Aqua, MODIS-Terra, VIIRS–SNPP, VIIRS-JPSS, OLCI-Sentinel 3A and OLCI-Sentinel 3B). The resultant Kds were compared to those inferred from measurements of radiometry from sensors on board autonomous profiling floats (BGC-Argo). Advantages of

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Bellacicco, Vellucci, Scardi, Barbieux, Marullo, and D’Ortenzio. "Quantifying the Impact of Linear Regression Model in Deriving Bio-Optical Relationships: The Implications on Ocean Carbon Estimations." Sensors 19, no. 13 (2019): 3032. http://dx.doi.org/10.3390/s19133032.

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Linear regression is widely used in applied sciences and, in particular, in satellite optical oceanography, to relate dependent to independent variables. It is often adopted to establish empirical algorithms based on a finite set of measurements, which are later applied to observations on a larger scale from platforms such as autonomous profiling floats equipped with optical instruments (e.g., Biogeochemical Argo floats; BGC-Argo floats) and satellite ocean colour sensors (e.g., SeaWiFS, VIIRS, OLCI). However, different methods can be applied to a given pair of variables to determine the coeff

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O’Brien, Terence, and Emmanuel Boss. "Correction of Radiometry Data for Temperature Effect on Dark Current, with Application to Radiometers on Profiling Floats." Sensors 22, no. 18 (2022): 6771. http://dx.doi.org/10.3390/s22186771.

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Measurements of daytime radiometry in the ocean are necessary to constrain processes such as photosynthesis, photo-chemistry and radiative heating. Profiles of downwelling irradiance provide a means to compute the concentration of a variety of in-water constituents. However, radiometers record a non-negligible signal when no light is available, and this signal is temperature dependent (called the dark current). Here, we devise and evaluate two consistent methods for correction of BGC-Argo radiometry measurements for dark current: one based on measurements during the day, the other based on nig

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Claustre, Hervé, Kenneth S. Johnson, and Yuichiro Takeshita. "Observing the Global Ocean with Biogeochemical-Argo." Annual Review of Marine Science 12, no. 1 (2020): 23–48. http://dx.doi.org/10.1146/annurev-marine-010419-010956.

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Biogeochemical-Argo (BGC-Argo) is a network of profiling floats carrying sensors that enable observation of as many as six essential biogeochemical and bio-optical variables: oxygen, nitrate, pH, chlorophyll a, suspended particles, and downwelling irradiance. This sensor network represents today's most promising strategy for collecting temporally and vertically resolved observations of biogeochemical properties throughout the ocean. All data are freely available within 24 hours of transmission. These data fill large gaps in ocean-observing systems and support three ambitions: gaining a better

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Matsumoto, George I., Kenneth S. Johnson, Steve Riser, Lynne Talley, Susan Wijffels, and Roberta Hotinski. "The Global Ocean Biogeochemistry (GO-BGC) Array of Profiling Floats to Observe Changing Ocean Chemistry and Biology." Marine Technology Society Journal 56, no. 3 (2022): 122–23. http://dx.doi.org/10.4031/mtsj.56.3.25.

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Abstract The Global Ocean Biogeochemistry (GO-BGC) Array is a project funded by the US National Science Foundation to build a global network of chemical and biological sensors on Argo profiling floats. The network will monitor biogeochemical cycles and ocean health. The floats will collect from a depth of 2,000 meters to the surface, augmenting the existing <ext-link ext-link-type="uri" xlink:href="https://argo.ucsd.edu/">Argo array</ext-link> that monitors ocean temperature and salinity. Data will be made freely available within a day of being collected via the Argo data system. T

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Barbieux, Marie, Julia Uitz, Bernard Gentili, et al. "Bio-optical characterization of subsurface chlorophyll maxima in the Mediterranean Sea from a Biogeochemical-Argo float database." Biogeosciences 16, no. 6 (2019): 1321–42. http://dx.doi.org/10.5194/bg-16-1321-2019.

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Abstract. As commonly observed in oligotrophic stratified waters, a subsurface (or deep) chlorophyll maximum (SCM) frequently characterizes the vertical distribution of phytoplankton chlorophyll in the Mediterranean Sea. Occurring far from the surface layer “seen” by ocean colour satellites, SCMs are difficult to observe with adequate spatio-temporal resolution and their biogeochemical impact remains unknown. Biogeochemical-Argo (BGC-Argo) profiling floats represent appropriate tools for studying the dynamics of SCMs. Based on data collected from 36 BGC-Argo floats deployed in the Mediterranea

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Barbieux, Marie, Julia Uitz, Alexandre Mignot, et al. "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." Biogeosciences 19, no. 4 (2022): 1165–94. http://dx.doi.org/10.5194/bg-19-1165-2022.

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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 northwestern Ligurian Sea and the central Ionian Sea, during summer months. We derived particulate organic carbon (POC) stock and gross community production integrated within the surface, euphotic and subsurface chlorophyll maximum (SCM) layers, using an existing approach applied to diel cycle measurements of the particulate beam attenuation (cp) and backsca

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Pietropolli, Gloria, Luca Manzoni, and Gianpiero Cossarini. "PPCon 1.0: Biogeochemical-Argo profile prediction with 1D convolutional networks." Geoscientific Model Development 17, no. 20 (2024): 7347–64. http://dx.doi.org/10.5194/gmd-17-7347-2024.

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Abstract. Effective observation of the ocean is vital for studying and assessing the state and evolution of the marine ecosystem and for evaluating the impact of human activities. However, obtaining comprehensive oceanic measurements across temporal and spatial scales and for different biogeochemical variables remains challenging. Autonomous oceanographic instruments, such as Biogeochemical (BGC)-Argo profiling floats, have helped expand our ability to obtain subsurface and deep-ocean measurements, but measuring biogeochemical variables, such as nutrient concentration, still remains more deman

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Chai, Fei, Yuntao Wang, Xiaogang Xing, et al. "A limited effect of sub-tropical typhoons on phytoplankton dynamics." Biogeosciences 18, no. 3 (2021): 849–59. http://dx.doi.org/10.5194/bg-18-849-2021.

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Abstract. Typhoons are assumed to stimulate primary ocean production through the upward mixing of nutrients into the ocean surface. This assumption is based largely on observations of increased surface chlorophyll concentrations following the passage of typhoons. This surface chlorophyll enhancement, occasionally detected by satellites, is often undetected due to intense cloud coverage. Daily data from a BGC-Argo profiling float revealed the upper-ocean response to Typhoon Trami in the northwest Pacific Ocean. Temperature and chlorophyll changed rapidly, with a significant drop in sea surface

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Stoer, Adam C., Yuichiro Takeshita, Tanya Lee Maurer, et al. "A census of quality-controlled Biogeochemical-Argo float measurements." Frontiers in Marine Science 10 (October 27, 2023). http://dx.doi.org/10.3389/fmars.2023.1233289.

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Biogeochemical- (BGC-) Argo aims to deploy and maintain a global array of autonomous profiling floats to monitor ocean biogeochemistry. With over 250,000 profiles collected so far, the BGC-Argo network is rapidly expanding toward the target of a sustained fleet of 1,000 floats. These floats prioritize the measurement of six key properties: oxygen, nitrate, pH, chlorophyll-a, suspended particles, and downwelling light. To assess the current biogeochemical state of the ocean, its variability, and trends with confidence, it is crucial to quality control these measurements. Accordingly, BGC-Argo m

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Dissertationen zum Thema "BGC-Argo profiling floats"

Cornec, Marin. "La dynamique des Maxima profonds de phytoplancton : une approche globale avec les flotteurs BGC-Argo." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS383.

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L’objectif de cette thèse consiste à cartographier la distribution régionale et saisonnière des maxima profonds de chlorophylle a (« Deep Chlorophyll Maxima », DCM) dans l’océan global, à comprendre les paramètres environnementaux qui contrôlent leur formation et leur persistance, et à estimer leur contribution dans les bilans de production primaire (PP) à l’échelle globale. Cette approche se base sur les mesures des flotteurs profileurs Biogéochimique-Argo (BGC-Argo). Une méthode de détection des DCMs et de leur typologie ( maxima de biomasse ou de photoacclimatation) a été développée et appl

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Barbieux, Marie. "Étude des relations bio-optiques dans l’océan global et du fonctionnement biogéochimique des maxima de subsurface de chlorophylle en Méditerranée à partir des mesures des flotteurs profileurs BGC-Argo." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS490.

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Cette thèse a pour objectif principal de mieux appréhender la dynamique spatio-temporelle et verticale de la biomasse phytoplanctonique dans l’océan ouvert. Dans un premier temps, nous avons étudié la variabilité de la relation entre le coefficient de rétrodiffusion particulaire (bbp), un estimateur bio-optique du carbone organique particulaire, et la concentration en chlorophylle a (Chla) à l’échelle globale. Dans les régimes subpolaires, des changements concomitants de Chla et bbp correspondent à des variations de la biomasse du phytoplancton. Au contraire, dans les régimes subtropicaux olig

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