Results 11 to 20 of about 975,462 (135)

A Simple Cloud-Native Spectral Transformation Method to Disentangle Optically Shallow and Deep Waters in Sentinel-2 Images [PDF]

Remote Sensing, 2022
This study presents a novel method to identify optically deep water using purely spectral approaches. Optically deep waters, where the seabed is too deep for a bottom reflectance signal to be returned, is uninformative for seabed mapping.
Chengfa Benjamin Lee, Dimosthenis Traganos, Peter Reinartz   +2 more
doaj   +2 more sources

How can Sentinel‐2 contribute to seagrass mapping in shallow, turbid Baltic Sea waters? [PDF]

Remote Sensing in Ecology and Conservation, 2022
Seagrass meadows are one of the most important benthic habitats in the Baltic Sea. Nevertheless, spatially continuous mapping data of Zostera marina, the predominant seagrass species in the Baltic Sea, are lacking in the shallow coastal waters.
Katja Kuhwald, Jens Schneider von Deimling, Philipp Schubert, Natascha Oppelt   +3 more
doaj   +4 more sources

Mapping bathymetry and shallow water benthic habitats in inland and coastal waters with Sentinel-2 [PDF]

Journal of Limnology, 2023
Accurate determination of the water depth and benthic macroalgae composition in coastal and inland water bodies is important due to the high commercial and ecological value of these regions.
Laura Argus, Tiit Kutser, Birgot Paavel, Martin Ligi, Claudia Giardino, Mariano Bresciani, Tiia Möller   +6 more
doaj   +2 more sources

Spectral and Radiometric Measurement Requirements for Inland, Coastal and Reef Waters [PDF]

Remote Sensing, 2020
This paper studies the measurement requirements of spectral resolution and radiometric sensitivity to enable the quantitative determination of water constituents and benthic parameters for the majority of optically deep and optically shallow waters on ...
Peter Gege, Arnold G. Dekker
doaj   +2 more sources

Geo-adaptive deep learning for regional-scale bathymetric modeling in optically and morphologically challenging waters: A case study of the Yellow River Estuary

Journal of Hydrology: Regional Studies
Study region: The Yellow River Estuary, China, is a shallow and highly turbid coastal zone with complex optical conditions that challenge traditional bathymetric inversion methods.
Hai Sun, Yanan Chu, Chao Fan, Huiqian Wang, Bingchen Liang   +4 more
doaj   +2 more sources

The spectral upwelling radiance distribution in optically shallow waters [PDF]

Limnology and Oceanography, 2003
The upwelling radiance distribution in optically shallow water is investigated with experiments and Hydrolight numerical simulations for two different benthic surfaces and a range of solar zenith angles (≪60°). Over a bright sand surface (water depth 5 m) the upwelling radiance distribution was brightest at nadir and decreased toward the horizon.
Kenneth J. Voss, Curtis D. Mobley, Lydia K. Sundman, James E. Ivey, Charles H. Mazel   +4 more
openaire   +2 more sources

Optical approaches to examining the dynamics of dissolved organic carbon in optically complex inland waters

Environmental Research Letters, 2012
Optical approaches were developed to examine the relationship between the optically active and the optically inactive fractions of dissolved organic carbon in inland waters.
Guangjia Jiang, Ronghua Ma, Steven A Loiselle, Hongtao Duan   +3 more
doaj   +2 more sources

Shallow water rogue wavetrains in nonlinear optical fibers [PDF]

Physics Letters A, 2013
In addition to deep-water rogue waves which develop from the modulation instability of an optical CW, wave propagation in optical fibers may also produce shallow water rogue waves. These extreme wave events are generated in the modulationally stable normal dispersion regime. A suitable phase or frequency modulation of a CW laser leads to chirp-free and
Wabnitz, Stefan, Finot, Christophe, Fatome, Julien, Millot, Guy   +3 more
openaire   +3 more sources

Ocean colour remote sensing in the southern Laptev Sea: evaluation and applications [PDF]

Biogeosciences, 2014
Enhanced permafrost warming and increased Arctic river discharges have heightened concern about the input of terrigenous matter into Arctic coastal waters.
B. Heim, E. Abramova, R. Doerffer, F. Günther, J. Hölemann, A. Kraberg, H. Lantuit, A. Loginova, F. Martynov, P. P. Overduin, C. Wegner   +10 more
doaj   +1 more source

A Portable Algorithm to Retrieve Bottom Depth of Optically Shallow Waters from Top-Of-Atmosphere Measurements

Journal of Remote Sensing, 2022
Bottom depth (H) of optically shallow waters can be retrieved from multiband imagery, where remote sensing reflectance (Rrs) are commonly used as the input.
Wendian Lai, Zhongping Lee, Junwei Wang, Yongchao Wang, Rodrigo Garcia, Huaguo Zhang   +5 more
doaj   +1 more source