Objective
The general objective of the joint efforts of eight NIS and INTAS research teams is to gain the understanding of the complex processes of electromagnetic waves emission and scattering on the ocean-atmosphere boundary related with the problem of global ocean salinity monitoring by spaceborne microwave radiometers. The specific objectives of this project are as follows:
-To develop a model describing the polarised L-band microwave radiation from wind-driven sea surface. The model will account for dielectric properties of sea water (sea surface temperature and salinity effect) and wind-induced variations of sea surface emissivity resulting from both long gravity waves and short gravity-capillary ripples;
-To measure in a laboratory the microwave emissivity of salted water with sensitive radiometers-polarimeters, to improve the model for the sea water permittivity;
-To study the impact of short gravity-capillary waves on the microwave emissivity of water surface;
-To experimentally investigate under natural conditions the sea-surface microwave radiation and backscatter with sensitive radiometers and scatterometers. The remote microwave measurements will be supported with proper in situ meteorological measurements and optical observation;
-To analyse the theoretical model and the experimental data to substantiate an advanced algorithm for sea surface salinity retrieval from microwave radiometric measurements.
The joint project incorporates the theoretical modelling of thermal microwave radiation from waved sea, laboratory measurements of the microwave radiation from smooth salted water and short gravity-capillary ripples, and field experiments aimed at measurements of the sea-surface microwave radiation and backscatter under controllable meteorological conditions.
At the first stage, the calculations of sea-surface microwave emission and a series of laboratory tests will be performed. During the tests, a model for water permittivity at microwaves will be refined through angular polarimetric measurements, and microwave emission from water with artificial periodic structure (modelling the gravity-capillary ripples) will be measured.
The second area for joint efforts is an experimental investigation of natural microwave radiation. The measurements will be performed from an offshore platform in the Black Sea. A comprehensive set of microwave and IR sensors together with meteorological and optical equipment will provide synchronous measurements of the microwave emission and backscatter characteristics and the environmental parameters. Combination of optical and microwave measurements will present a possibility to compare and verify different methods of surface wave spectra remote determination.
As the final result of the project, an advanced algorithm for sea surface salinity retrieval from microwave radiometric measurements will be developed, accounting for the brightness temperature variations due to wind waves.
Fields of science (EuroSciVoc)
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Funding Scheme
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Coordinator
50127 Firenze
Italy
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.