Results 31 to 40 of about 975,462 (135)

An Exponential Algorithm for Bottom Reflectance Retrieval in Clear Optically Shallow Waters from Multispectral Imagery without Ground Data

open access: yesRemote Sensing, 2021
Bottom reflectance is a significant parameter characterizing the bottom types for clear optically shallow waters, typically in oceanic islands and reefs.
Yunhan Ma   +7 more
doaj   +1 more source

A Statistical Algorithm for Estimating Chlorophyll Concentration in the New Caledonian Lagoon

open access: yesRemote Sensing, 2016
Spatial and temporal dynamics of phytoplankton biomass and water turbidity can provide crucial information about the function, health and vulnerability of lagoon ecosystems (coral reefs, sea grasses, etc.). A statistical algorithm is proposed to estimate
Guillaume Wattelez   +5 more
doaj   +1 more source

Cloud-Native Coastal Turbid Zone Detection Using Multi-Temporal Sentinel-2 Data on Google Earth Engine

open access: yesFrontiers in Marine Science, 2021
The lack of clarity in turbid coastal waters interferes with light attenuation and hinders remotely sensed studies in aquatic ecology such as benthic habitat mapping and bathymetry estimation.
Avi Putri Pertiwi   +2 more
doaj   +1 more source

Satellite and airborne remote sensing of gross primary productivity in boreal Alaskan lakes

open access: yesEnvironmental Research Letters, 2020
In terrestrial and marine ecosystems, remote sensing has been used to estimate gross primary productivity (GPP) for decades, but few applications exist for shallow freshwater ecosystems.Here we show field-based GPP correlates with satellite and airborne ...
Catherine Kuhn   +9 more
doaj   +1 more source

An Adaptive Blended Algorithm Approach for Deriving Bathymetry from Multispectral Imagery

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The log-ratio method (LRM) proposed by Stumpf et al. has been widely used to map bathymetry from multispectral imagery for oligotrophic waters, while the selection criteria of bands for the LRM have been subject to tradeoffs between maximum detectable ...
Yongming Liu   +7 more
doaj   +1 more source

MODIS –AQUA AND SENTINEL-2 DATA FUSION: APPLICATION TO OPTICALLY SHALLOW WATERS OF LAKE MICHIGAN

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2018
Subsumed under the category of ocean colour (OC) data fusion tools, a new approach is developed to efficiently use the merits of two OC satellite sensors differing in their spatial and spectral resolution characteristics. The tool permits to combine high
Anton Korosov   +2 more
doaj   +1 more source

Extracting Remotely Sensed Water Quality Parameters from Shallow Intertidal Estuaries

open access: yesRemote Sensing, 2022
Sentinel-2 imagery is potentially ideal for providing a rapid assessment of the ecological condition of estuarine water due to its high temporal and spatial resolution and coverage.
Zhanchao Shao   +3 more
doaj   +1 more source

Evaluation of Satellite Retrievals of Chlorophyll-a in the Arabian Gulf

open access: yesRemote Sensing, 2017
The Arabian Gulf is a highly turbid, shallow sedimentary basin whose coastal areas have been classified as optically complex Case II waters (where ocean colour sensors have been proved to be unreliable).
Noora Al-Naimi   +3 more
doaj   +1 more source

EXTRACTION OF BENTHIC COVER INFORMATION FROM VIDEO TOWS AND PHOTOGRAPHS USING OBJECT-BASED IMAGE ANALYSIS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Mapping benthic cover in deep waters comprises a very small proportion of studies in the field of research. Majority of benthic cover mapping makes use of satellite images and usually, classification is carried out only for shallow waters.
M. T. L. Estomata   +3 more
doaj   +1 more source

Suitability of multisensory satellites for long-term chlorophyll assessment in coastal waters: A case study in optically-complex waters of the temperate region

open access: yesEcological Indicators, 2022
We investigated the use of multisensory satellite data to determine long-term changes in surface chlorophyll concentrations using a 19-year (1998–2016) time series of chlorophyll data in the Danish Kattegat region of the Baltic Sea.
Sanjina Upadhyay Staehr   +3 more
doaj   +1 more source

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