The system will predict and visualize indices such as the occurrence of rip currents, the degree of beach inundation and the magnitude of dune erosion, and will enable the amount of material eroded from the shore

zone and the quantity see more of suspended particulate matter in the water to be estimated. The results of Xbeach model simulations are analysed with the threshold parameters of SatBałtyk indices in order to assess the forecast threat to the shore zone. Apart from the visualization of the forecasts of the several indices on a public website, a ‘storm effect data base’ will also be set up as part of this system. This will store information, which can subsequently be used for making further, more detailed analyses of particular phenomena.

A test system is at present being constructed with reference to a 14 km long section of dune shore on the western Polish coast, including the Dziwnów Spit (Figure 12). In later stages of the project, depending on the availability of data, it is anticipated that the system will include shore sections along the Lake Kopań Spit, at Sopot and along the Hel Peninsula. We regard the present state of advancement of our work on the construction of the final version of the SatBałtyk Operational System for the remote monitoring of the Baltic Sea as satisfactory. It is already possible to make effective use of this system for estimating current values and for forecasting within a certain range selected biotic and abiotic characteristics of this sea. This has been demonstrated by our research Venetoclax manufacturer results to date, including our estimates of various characteristics of the Baltic environment given in this article. The preliminary results of the empirical validation of the entire algorithm are described. To this end, the magnitudes of ecosystem parameters determined using the algorithm OSBPL9 with data from AVHRR (NOAA 17, 18, 19), SEVIRI (Meteosat 9) and MODIS (AQUA) satellites are compared with the magnitudes of the same parameters recorded at Baltic in situ measurement

stations. The relevant errors have been calculated from these comparisons in accordance with arithmetic and logarithmic statistics (Table 1). At the current stage of development of the SatBałtyk algorithm for the Baltic, these errors, typical of remote, spatial estimates, can be regarded as fairly satisfactory. Nevertheless, in order to reduce them, improvement of all the components of this complex algorithm will continue. This series of two papers presents only the possibilities of investigations of Baltic environment with the use SatBałtyk operational system. In the paper were described the exemplary results for selected situations mainly for April 2011. The analyses of seasonal changes of different parameters of Baltic ecosystem are in progress and will be presented soon.