The possibilities of chlorophyll a (Chl a) and total suspended matter (TSM) retrieval using Sentinel-2/MSI imagery in situ measurements the Gorky Reservoir are investigated. This water body is an inland freshwater ecosystem within territory Russian Federation. During algal bloom period, optical properties extremely heterogeneous vary on scales tens meters. Additionally, they time under influence currents wind forcing. In this case, usage traditional station-based sampling to describe state...

According to observations over the past 20 years, oligotrophic Lake Teletskoye (Altai Republic) is undergoing gradual eutrophication, showing necessity of regular monitoring its ecological state. In August 2023, multiparametric hydrooptical studies were carried out on Teletskoye, including measurements spectral water upwelling radiance reflectance and underwater irradiance, as well sampling for laboratory determination chlorophyll a concentration. main part lake, maxima coefficient observed...

AbstractA concentration-weighted trajectory method for aerosol source localization based on joint statistical analysis of column volume concentrations and back-trajectory data was used to estimate the spatial distribution sources in East-European region. The concentration measured at five AERONET network sites, Belsk, Minsk, Kyiv, Moldova/Kishinev, Sevastopol, were used. geographical areas responsible increased content monitoring sites mapped separately coarse-mode fine-mode fractions....

In this paper, we propose to analyze the values of “blue” color index for further use in additional atmospheric correction Level 2 remote sensing reflectance data waters Black Sea. Regardless seasonal phenomena, conditions, and type water, average short-wave region, according situ measurements CI(412/443), varies from 0.77 0.83. The most frequently observed value is 0.8. turn, CI(412/443) satellite MODIS Aqua/Terra, VIIRS SNPP, OLCI Sentinel 3A scanners showed a large scatter based on...

Atmospheric correction of satellite optical data is based on an assessment the characteristics atmosphere, such as aerosol depth atmosphere and spectral slope its spectrum, so-called Angstrom parameter. Inaccurate determination these parameters one causes errors in retrieval remote sensing reflectance spectra. In this work, obtained large array field for northeastern part Black Sea used, including ship-based measurements atmospheric sea reflectance, MODIS Aqua/Terra OLCI Sentinel-3 A/B Level...

Results of the seawater reflectance coefficient measurements carried out in 2002 – 2014 on oceanographic platform Marine Hydrophysical Institute using spectrophotometer designed by authors are discussed. Reflectance is measured range 390 700 nm with 2.5 step. The light reflected sea surface taken into account special measurement technique. processing algorithm allows to calculate following biooptical characteristics: concentration phytoplankton pigments, absorption nonliving organic matter...

Определение концентраций естественных примесей в водах пресноводных водоёмов по спутниковым данным требует решения целого ряда задач, одной из которых является создание регионального биооптического алгоритма.Такого рода работы активно ведутся для открытых районов океанов и морей, а также прибрежных морских зон.В настоящей работе предложено использовать существующий «черноморский» полуаналитический алгоритм (Ли др., 2015) с целью его адаптации под пресные эвтрофные воды Горьковского...

The data of the sea reflectance coefficient were obtained during cruise R/V “Akademik Ioffe” (10 August–8 September 2021) in Kara Sea beyond Arctic Circle. A total 28 measurements performed different conditions ranging from estuarine zones to open ocean. In addition, at 10 stations, water samples taken, and chlorophyll-a concentrations determined using fluorometric method. situ compared satellite (MODIS Aqua/Terra, Sentinel OLCI 3A/B, VIIRS SNPP) within 24 h before after measurement. It was...

Results of seawater reflectance measurements carried out in the Black Sea coastal waters summer-autumn season, 2002-2014 on oceanographic platform Experimental Department MHI are discussed.The data were obtained using spectrophotometer developed Marine Optics MHI.Special measuring technique allows one to take into account light reflected by sea surface that eliminates necessity sub-surface probing and provides higher accuracy as compared results model simulations.The show period spectra...

The results of the sea water hydro-optical characteristics calculation from satellite and contact data using a modified bio-optical model are presented. research optical during mass growth coccolithophore is carried out. estimates coccolith chlorophyll concentration obtained.

We consider a method used for the solution of inverse problem biooptics sea according to spectrum upwelling radiation and propose procedure correction data measurement by fixing value reflectance at wavelength 400 nm. The influence this assumption on results retrieving concentrations admixtures in seawater is analyzed. computed values concentration chlorophyll correspond direct biological measurements, reconstructed spectra absorption coefficient phytoplankton have local maxima typical...

В работе представлены результаты исследования коэффициента яркости (КЯ) воды Горьковского водохранилища по данным судовых измерений, выполненных с мая октябрь 2018 г., применительно к задачам спутникового мониторинга качества вод внутренних водоёмов

We present the results of measurements optical characteristics waters (the beam attenuation coefficient, volume scattering function, sea water reflectance, and Secchi depth) atmosphere (aerosol thickness, content vapors, Ångström exponent) carried out in September 2008 on oceanographic platform near Katsiveli. comparative analysis hydrooptical measured various years. The type period observations is determined.

The methods of determination concentration and scattering by suspended particles in seawater are compared. considered include gravimetric measurements the mass matter, empirical analytical calculations based on light beam attenuation coefficient (BAC) 4 spectral bands, calculation backscattering using satellite visible range. data were obtained two cruises R/V "Professor Vodyanitsky" deep-water part Black Sea July October 2016., Spatial distribution marine according to is good agreement with...

New hydro-optical instruments for sub-pixel scale investigation of satellite features and a new technique to invert water properties is described. The semi-analytic algorithm, based on high resolution spectrally continuous remote sensing reflectance measurements, proposed inversion the optical properties. algorithm retrieves absorption spectra phytoplankton pigment concentration.

Method of satellite data correction, adjusting the standard atmospheric is considered. Marine phytoplankton pigment concentrations were retrieved from SeaWiFS using correction proposed. Maps chlorophyll distribution in region Crimean South Coast plotted, showing best correlation with biological than when methods.

This paper is devoted to the study of possibilities restoring concentrations chlorophyll-a (Chl-a) and total suspended matter (TSM) in fresh waterbodies using images Sentinel-2 / MSI Gorky reservoir as an example, validated via high-resolution ground-truth data obtained by fluorescence lidar UFL. water area period intense chromaticity cyanobacteria distinguished their completely heterogeneous spatial-temporal distribution with scales patchiness from several tens meters high temporal...

This paper presents and discusses the results of optical biological measurements performed during coccolithophore blooms. study uses data from a stationary oceanographic platform (near Southern coast Crimea, 44°23' N, 33°59' E) in July 2012 (7–16 July) May 2017 (24–31 May), obtained R/V “Professor Vodyanitsky” expedition to northern part Black Sea June (14–30 June). Observation periods coincided with intensive blooms coccolithophore. The Secchi disk depth, light beam attenuation coefficient...

This paper proposes a method of remote determination the suspended matter concentration in seawater on effective wavelength upwelling radiation. The system orthogonal functions is found, allowing to retrieve reflectance sea using two measurements green part visible spectrum. Empirical relations linking with for Black Sea waters are presented and analyzed.

This work precedes the field experiment on Lake Teletskoye, which is scheduled for August 10-20, 2023. The main goal of to get an information regional features and seasonal variability optically active characteristics water upper layer Teletskoye based <i>Level-2</i> standard products <i>OLCI</i> optical scanner.

The applied method consists of solving the inverse problem marine bio-optics based on sea reflectance spectrum. Non-standard parameterization seawater optical properties is realized in iterative algorithm. condition constancy at wavelength 400 nm shown to stabilize algorithm processing. Maps chlorophyll concentration distribution are plotted for South Coast Crimea. obtained values typical Black Sea coastal regions summer.