Satellite remote sensing observations and on-site observations on offshore platforms are currently the two most mainstream means of observing characteristics of marine aerosols. Among them, satellite remote sensing observations have the advantage of a wide range of observations, while on-site observations on offshore platforms can obtain observation data with higher time resolution, and have the advantages of easy calibration and maintenance, and high-quality observation data. By using the measured aerosol optical thickness data from the Calibration Validation Field Network of Autonomous Ocean Satellites in the North Yellow Sea, the main aerosol types and optical properties of the offshore station are discussed to provide theoretical and technical support for the calibration and validation of autonomous ocean satellites, as well as the commercial operation of autonomous calibration and validation field networks. Using data from January 2020-June 2023, the data were classified into six main aerosol types according to the graphical classification: clean, desert dust, continental, subcontinental, urban industrial and biomass burning aerosols, and the main aerosol particles at the stations were analyzed by the ESI, single scattering albedo and fine mode fraction. The results show that spring is the most polluted season among the four seasons in the area, continental-type aerosols dominate throughout the year, and the main aerosol type at the station is a continental type aerosol with weak and moderate absorption coarse particle mode.
Estuary is an important part of the coastal zone. It is the junction of rivers and ocean. It is not only the end of the material in rivers, but also the beginning of the material in ocean, and an important place for the exchange of material and energy between continents and oceans. The Yongding New River flows into the Bohai Bay, which is an important area for the construction of the Bohai Rim Economic Zone. The migration law of chlorophyll concentration and its influencing factors are the core issues of estuarine research. Remote sensing inversion can realize dynamic, continuous and synchronous observation of large areas of water, and quickly obtain the spatiotemporal distribution of chlorophyll concentration. In this study, the Sentinel-2 MSI data from 2017 to 2021 were used to retrieve the chlorophyll concentration in the study area. Based on these data, the spatiotemporal variation of chlorophyll concentration in different seasons and its influencing factors were analyzed. The results show that the chlorophyll concentration in the study area has obvious temporal and spatial distribution rules, which is higher in spring and winter, lower in Summer and Autumn. The three elements of Sea Surface Temperature (SST), Photosynthetically Active Radiation (PAR) and Wind Speed (WS) all have an impact on the spatiotemporal distribution of chlorophyll concentration.
Satellite remote sensing observations and on-site observations on offshore platforms are currently the two most
mainstream means of observing characteristics of marine aerosols. Among them, satellite remote sensing observations
have the advantage of a wide range of observations, while on-site observations on offshore platforms can obtain
observation data with higher time resolution, and have the advantages of easy calibration and maintenance, and high quality
observation data. With the successive launch of my country’s operational marine satellites HY-1C and HY-1D, and
the commissioning of the China Marine Satellite Maritime Calibration and Inspection Field, my country now has the ability
to use marine optical satellites and on-site observation platforms in the area where the marine observation platform is
located. Conditions for joint observation of aerosol characteristic parameters. In this paper, aiming at the offshore waters
of Zhejiang where the Dongou Ocean Comprehensive Observation Platform is located, combining satellite observation
data and field platform observation aerosol optical thickness, Angstrom index, scale distribution and fine-mode ratio, single
scattering albedo, complex refractive index and other data, The analysis of the characteristics of aerosols in the coastal
waters of Zhejiang shows that the aerosol properties in this area are stable and change little during the interannual period.
The aerosol optical thickness is higher in spring and lower in autumn. In summer, the proportion of fine-mode aerosols is
relatively high, the scattering effect is weak, and the absorption effect is relatively strong; while in winter, the coarse mode
aerosols in the sea area occupy a larger proportion, the scattering effect is strong, and the relative absorption effect is weak.
And the quantitative relationship between the single scattering albedo and the absorption coefficient of the aerosol scale
distribution model of the sea area is given.
In order to ensure the reliability of satellite data, it is necessary to test the authenticity of satellite products during the operation of ocean color satellite in orbit. Therefore, it is significant to obtain accurate sea surface field data, which can provide source data for the authenticity test of satellite products. At present, the main means of acquiring data at sea in China is still large-scale voyage test on board ships. This method needs high cost and requires a lot of manual operation, and the efficiency of acquiring data is extremely limited. However, a large amount of observation data can be obtained by establishing long-term automatic observation stations at sea, and the cost is low. In this paper, the continuous observation data of atmospheric optical parameters obtained by CE318 solar photometer installed on Wenzhou offshore platform in Zhejiang Province are analyzed based on the data processing method of AERONET. Combined with the actual situation, the automatic observation data of atmospheric optical parameters at sea are qualitatively controlled and verified by satellite data. Finally, a data quality control scheme for automatic observation of atmospheric optical parameters at sea is proposed.
With the rapid development of marine satellites in China, several marine satellites are about to be launched in recent planning. It is important to evaluate the payload performance of marine satellites, but the research on satellite load assessment is almost carried out for terrestrial satellites. The imaging region of the Coastal Zone Imager includes marine water bodies, so some assessment methods for estimating the performance of terrestrial satellites may not be applicable. In this paper, by analyzing and comparing the advantages and disadvantages of the current calculation methods of load performance evaluation, combined with the characteristics of the Coastal Zone Imager, the load performance evaluation scheme for Ocean color satellite is selected, and the real remote sensing data is used to verify the results.
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