A5032155337- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Water Quality Monitoring and Analysis
- Atmospheric and Environmental Gas Dynamics
- Coral and Marine Ecosystems Studies
- Water Quality Monitoring Technologies
- Oil Spill Detection and Mitigation
- Marine and fisheries research
- Remote-Sensing Image Classification
- Marine Biology and Ecology Research
- Remote Sensing and Land Use
- Calibration and Measurement Techniques
- Environmental Monitoring and Data Management
- Remote Sensing in Agriculture
- Isotope Analysis in Ecology
- Ocean Waves and Remote Sensing
- Underwater Acoustics Research
- Remote Sensing and LiDAR Applications
- Coastal and Marine Management
- Advanced Computational Techniques and Applications
- Advanced Image Fusion Techniques
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Underwater Vehicles and Communication Systems
- Impact of Light on Environment and Health
University of Southern Mississippi
2012-2022
Stennis Space Center
2012-2022
Optica
2019
United States Naval Research Laboratory
2005-2018
Oceanography Society
2018
K Lab (United States)
1990-2012
United States Navy
2008-2011
University of Minnesota
2004
University of South Florida St. Petersburg
2002
University of Minnesota System
1998
For open ocean and coastal waters, a multiband quasi-analytical algorithm is developed to retrieve absorption backscattering coefficients, as well coefficients of phytoplankton pigments gelbstoff. This based on remote-sensing reflectance models derived from the radiative transfer equation, values total are analytically calculated reflectance. In calculation coefficient, no spectral for pigment gelbstoff used. Actually those spectrally decomposed coefficient in separate calculation. The easy...
Euphotic zone depth, z 1% , reflects the depth where photosynthetic available radiation (PAR) is of its surface value. The value a measure water clarity, which an important parameter regarding ecosystems. Based on Case‐1 assumption, can be estimated empirically from remotely derived concentration chlorophyll‐a ([Chl]), commonly retrieved by employing band ratios remote sensing reflectance ( R rs ). Recently, model based water's inherent optical properties (IOPs) has been developed to...
The diffuse attenuation coefficient for downwelling irradiance ( K d ) is an important parameter ocean studies. For the vast only feasible means to get fine‐scale measurements of by color remote sensing. At present, values from sensing are estimated using empirical algorithms. Such approach insufficient provide understanding regarding variation and contains large uncertainties in derived values. In this study a semianalytical model developed based on radiative transfer equation, with...
Penetration of solar radiation in the ocean is determined by attenuation coefficient ( K d λ )). Following radiative transfer theory, a function angular distribution incident light and water's absorption backscattering coefficients. Because these optical products are now generated routinely from satellite measurements, it logical to evolve empirical semianalytical that not only spectrally flexible, but also sun‐angle effect accounted for explicitly. Here, model developed Lee et al . (2005b)...
Using hyperspectral measurements made in the field, we show that effective sea-surface reflectance ρ (defined as ratio of surface-reflected radiance at specular direction corresponding to downwelling sky from one direction) varies not only for different measurement scans, but also can differ by a factor 8 between 400 nm and 800 same scan. This means derived water-leaving (or remote-sensing reflectance) be highly inaccurate if spectrally constant value is applied (although errors reduced...
Following the theory of error propagation, we developed analytical functions to illustrate and evaluate uncertainties inherent optical properties (IOPs) derived by quasi-analytical algorithm (QAA). In particular, evaluated effects these parameters on inverted IOPs: absorption coefficient at reference wavelength, extrapolation particle backscattering coefficient, spectral ratios coefficients phytoplankton detritus/gelbstoff, respectively. With a systematically simulated data set (46,200...
Remote-sensing reflectance (R(rs)), which is defined as the ratio of water-leaving radiance (L(w)) to downwelling irradiance just above surface (E(d)(0⁺)), varies with both water constituents (including bottom properties optically-shallow waters) and angular geometry. L(w) commonly measured in field or by satellite sensors at convenient angles, while E(d)(0⁺) can be estimated based on atmospheric properties. To isolate variations R(rs) (or L(w)) resulting from a change constituents, effects...
An approximate linear relationship between the scattering coefficient and wavelength of light in visible is found case 1 2 waters. From this relationship, we estimate at an unknown from a single measured wavelength. This approximation based on measurements 1.5-m-thick surface layer collected with AC9 instrument 63 stations Arabian Sea, northern Gulf Mexico, coastal North Carolina. The light-scattering 412 nm ranged 0.2 to 15.1 m-1 these waters, absorption 4.0 m-1. A separate data set for 100...
We present the results of a study optical scattering and backscattering particulates for three coastal sites that represent wide range properties are found in U.S. near-shore waters. The 6000 spectra collected this can be well approximated by power-law function wavelength. exponent particulate changes dramatically from site to (and within each site) compared with where all spectra, except possibly very clearest waters, cluster around single wavelength −0.94. backscattering-to-scattering...
Satellite and ship data collected between May 1 22, 1986, show that the Algerian Current originates in Almeria‐Oran Front remains within 30 km of coast for over 300 km, Oran Algiers. The differences water masses current resident regional waters are clearly observed chlorophyll concentrations optical characteristics, thus permitting resulting patterns to be used as tracers circulation. During this field period, begins an extension Front, which is found at western periphery Eastern Alboran...
Abstract. A compiled set of in situ data is important to evaluate the quality ocean-colour satellite-data records. Here we describe for validation products from ESA Ocean Colour Climate Change Initiative (OC-CCI). The were acquired several sources (MOBY, BOUSSOLE, AERONET-OC, SeaBASS, NOMAD, MERMAID, AMT, ICES, HOT, GeP&CO), span between 1997 and 2012, have a global distribution. Observations following variables compiled: spectral remote-sensing reflectances, concentrations...
Abstract. 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 compilation, starting 1997, now extends to 2021, which important most recent satellite optical sensors such as Sentinel 3B OLCI and NOAA-20 VIIRS. The comprises observations following variables: spectral remote-sensing reflectance, concentration chlorophyll-a, inherent properties, diffuse attenuation coefficient, total suspended...
Hyperion is a hyperspectral sensor on board NASA's EO-1 satellite with spatial resolution of approximately 30 m and swath width about 7 km. It was originally designed for land applications, but its unique spectral configuration (430 nm - 2400 ~10 resolution) high make it attractive studying complex coastal ecosystems, which require such accurate retrieval environmental properties. In this paper, data over an area the Florida Keys used to develop test algorithms atmospheric correction...
About 30 years ago, NASA launched the first ocean-color observing satellite:the Coastal Zone Color Scanner. CZCS had 5 bands in visible-infrared domain with anobjective to detect changes of phytoplankton (measured by concentration chlorophyll) inthe oceans. Twenty later, for same objective but advanced technology, theSea-viewing Wide Field-of-view Sensor (SeaWiFS, 7 bands), Moderate-ResolutionImaging Spectrometer (MODIS, 8 and Medium Resolution ImagingSpectrometer (MERIS, 12 bands) were...
It is known that scattering by particulates within natural waters the main cause of blur in underwater images. Underwater images can be better restored or enhanced with knowledge point spread function (PSF) water. This will extend performance range as well information retrieval from electro-optical systems, which critical many civilian and military applications, including target especially mine detection, search rescue, diver visibility. A understanding physical process involved also helps...
Measurements of the underwater polarized light field were performed at different stations, atmospheric conditions and water compositions using a newly developed hyperspectral multiangular polarimeter during recent cruise in coastal areas New York Harbor - Sandy Hook, NJ region (USA). Results are presented for waters with chlorophyll concentrations 1.3-4.8 microg/l minerals 2.0- 3.9 mg/l. Angular spectral variations degree polarization found to be consistent theory. Maximum values do not...
Abstract. A global compilation of in situ data is useful to evaluate the quality ocean-colour satellite records. Here we describe compiled for validation products from ESA Ocean Colour Climate Change Initiative (OC-CCI). The were acquired several sources (including, inter alia, MOBY, BOUSSOLE, AERONET-OC, SeaBASS, NOMAD, MERMAID, AMT, ICES, HOT and GeP&CO) span period 1997 2018. Observations following variables compiled: spectral remote-sensing reflectances, concentrations...
The alternative hypothesis that observed regions of recurrent hypoxia on the New Jersey inner shelf are more related to coastal upwelling than riverine inputs nutrients was investigated through a series multidisciplinary research programs beginning in 1993. largest variations ocean temperatures along coast, other seasonal, found be caused by episodic summertime events driven southwesterly winds associated with atmospheric Bermuda High. Off southern coast Jersey, topographic ancient river...
WorldView 2 (WV2), launched in September 2009, is a satellite with hyperspatial resolution ( <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\sim$</tex></formula> 0.5–2 m) capability for Earth surface observation. It has eight spectral bands enhanced signal-to-noise ratio to cover the visible-to-near-infrared (V–NIR) domain, thus providing great potential remote sensing of coastal ecosystem,...
Above-water measurements of water-leaving radiance are widely used for water-quality monitoring and ocean-color satellite data validation. Reflected skylight in above-water radiometry needs to be accurately estimated prior derivation radiance. Up-to-date methods estimate reflection diffuse on rough sea surfaces based radiative transfer simulations sky measurements. But these neglect the polarization state incident skylight, which is generally highly polarized. In this paper, effects surface...