Floating algae index

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August undefined, 2024

WebAFAI: Alternate Floating Algae Index (in reflectance units) to detect ocean surface features such as Sargassum, green macroalgae, and cyanobacteria. AFAI is estimated by Chuanmin Hu (USF). AFAI is sensitive to detect subtle ocean surface features, but it saturates under sun glint, clouds, or thick aerosols. Reference: Hu, C., L. Feng, R. F ... Web1 day ago · Updated: Apr 13, 2024 / 01:03 AM PDT. BEIJING (AP) — Many areas in northern China were blanketed with floating sand and dust on Thursday, and a sandstorm was expected to sweep through parts of ...

Mapping Spatial Distribution and Biomass of Intertidal

WebApr 13, 2024 · Opportunistic macroalgal blooms have been used for the assessment of the ecological status of coastal and estuarine areas in Europe. The use of earth observation (EO) data sets to map green algal cover based on a Normalized Difference Vegetation Index (NDVI) was explored. Scenes from Sentinel-2A/B, Landsat-5, and Landsat-8 … WebThe other two important used indices (floating algal index FAI and phytoplankton turbidity index PTI) were used to indicate the presence of macroalgae and phytoplankton … grand view colorado springs

Detecting Cyanobacteria Using Satellite Images with Google

WebMar 12, 2024 · This study proposed a novel algal bloom detection index (ABDI) based on Sentinel-2 Multispectral Instrument (MSI) data. The ABDI was evaluated by application … WebApr 12, 2024 · Extensive floating macroalgae have drifted from the East China Sea to Japan’s offshore area, and field observation cannot sufficiently grasp their extensive spatial and temporal changes. High-spatial-resolution satellite data, which contain multiple spectral bands, have advanced remote sensing analysis. Several indexes for recognizing … WebAmong the many water color indices, the floating algae index (FAI) is an effective spectrum index for distinguishing floating cyanobacteria [ 16 ]. It has already been used for cyanobacteria bloom extraction in China’s Taihu Lake [ 15 ]. grandview columbus ohio map

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WebMaps of sargassum detection index NFAI (Normalized Floating Algae Index) for the year 2024 using OLCI. Types of dataset: multimission dataset using OLCI ocean color sensor onboard Sentinel-3A & Sentinel -3B satellites. Contents: sargassum detection index (NFAI) computed from daily images of OLCI Sentinel-3A & 3B at 300m resolution, and averaged ... WebJan 18, 2013 · The SAI is a necessary intermediate product used as a platform to quantify the spatial coverage of floating macroalgae observed in satellite imagery. The presence of normal frequency distributions of … grandview columbus ohio hotelsWebFloating Algae Index (left) reveals algae and Color Index (right) shows circulations patterns SaWS Clickable Map All data products can be accessed freely under … grandview columbus ohio

"WebMar 18, 2024 · Phosphorus and nitrogen in the sea can serve as food for the algae. Those elements can be dumped into the ocean from rivers, which gain concentrations of phosphorus and nitrogen from human... " - Floating algae index

Floating algae index

WebFeb 18, 2024 · Here, a generic, simple and effective method, referred to as the Floating Green Tide Index (FGTI), was proposed to detect floating green macroalgae blooms … WebThe Floating Algae Index (FAI) proposed by Hu ( 2009) was widely used to identify and extract algal bloom information, and obtain the spatio-temporal distribution for further analysis, monitoring and early warning purposes (Hu …

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WebOct 1, 2009 · A novel ocean color index to detect floating algae in the global oceans 1. Introduction. Beginning with the Coastal Zone Color Scanner (1978–1986), all satellite … WebApr 12, 2024 · The observations of birds on the floating platform were first-of-its-kind; no comparison is made to other floating infrastructure or other locations. ... Not only does Mytilus contribute to the production of OM, micro- and macro algae, plankton, ... Chlorophyll-a is a parameter often used as an index of phytoplankton biomass, as it can …

WebFeb 4, 2024 · The floating algae on the sea surface behave like a volume-scattering hard object, and the algae patch area’s reflected signal is much stronger than that backscattered one from the surrounding water, which appears as brighter regions in SAR images. WebThe raw satellite data are provided by the U.S. NASA and USGS.These data are downloaded and processed through a Virtual Antenna System using both standard and customized algorithms. Of particular importance are the two customized data products, namely the floating algae index (FAI) to detect floating algae and other materials on …

WebAFAI: Alternate Floating Algae Index (in reflectance units) to detect ocean surface features such as Sargassum, green macroalgae, and cyanobacteria. AFAI is estimated by … WebApr 23, 2024 · Key to detecting floating materials on subpixel scales was an index we developed - the Floating Debris Index (FDI), and …

WebOct 15, 2024 · Plenty of threshold-based index methods have been developed to detect surface algae pixels in various ocean color data with different manners; however, these methods cannot be used for every...

WebMar 16, 2024 · What is sargassum Sargassum is a catch-all term that can be used to refer to more than 300 species of brown algae, although Sargassum natans and Sargassum fluitans are the two species most... grandview commons hoaWebOct 1, 2009 · Here, a simple ocean color index, namely the Floating Algae Index (FAI), is developed and used to detect floating algae in open ocean environments using the … grandview columbus ohio zip codeWebJun 1, 2016 · Floating macroalgae and VB-FAH index Several indices have been proposed and used by the research community to map vegetative cover. Among these, the concept of NDVI (Normalized Difference Vegetation Index, Eq. (3), Rouse, Haas, Schell, & Deering, 1973) is perhaps the most widely used index. grandview cometsWebOct 1, 2009 · Here, a simple ocean color index, namely the Floating Algae Index (FAI), is developed and used to detect floating algae in open ocean environments using the … chinese structural steel shapesWebAug 1, 2024 · Proliferation of sargassum across the tropical Atlantic since 2011 has motivated a range of forecasting methods. Statistical methods based on basin-scale satellite data are used to address seasonal timescales. Other methods involve explicit Lagrangian calculations of trajectories for particles that are representative of drifting sargassum over … chinese structural steel shapes catalogWebJun 15, 2024 · High floating algae index concentrations clustered together by k-means for centroid locations to pinpoint particle movement. Product of original process (Figures 1A, 2A, and 3A) Figure 4B High floating algae index concentration locations to be advected. Product of new, higher resolution process (Figures 1B, 2B, and 3B) chinese stroudsburgWebFloating algae often appears in images as slicks over the relatively homogeneous background in the FAI imagery, while ocean circulation patterns may be inferred … grandview commons lp