Operational forecast of hydrophysical fields in the Georgian Black Sea coastal zone within the ECOOP

Abstract

Abstract.One of the parts of the Black Sea Nowcasting/Forecasting System is the regional forecasting system for the easternmost part of the Black Sea (including the Georgian water area), which has been developed within the context of the EU International projects ARENA and ECOOP. A core of the regional system is a high-resolution baroclinic regional model of the Black Sea dynamics developed at M. Nodia Institute of Geophysics (RM-IG). This model is nested in the basin-scale model of Marine Hydrophysical Institute (MHI, Sevastopol/Ukraine). The regional area is limited to the Caucasian and Turkish coastal lines and the western liquid boundary coinciding with the meridian 39.36 • E. Since June 2010 we have regularly been computing 3 days' forecasts of current, temperature and salinity for the easternmost part of the Black Sea with 1 km spacing. In this study the results of two forecasts are presented. The first forecast corresponds to summer season and covers the prognostic interval from 00:00 h, 6 August to 00:00 h, 9 August 2010. The second one corresponds to autumn season and covers the prognostic interval from 00:00 h, 26 October to 00:00 h, 29 October 2010. Data needed for the forecasts -the initial and prognostic hydrophysical fields on the open boundary, also 2-D prognostic meteorological fields at the sea surface -wind stress, heat fluxes, evaporation and precipitation rates for our regional area are being placed on the MHI server every day and we are available to use these data operatively. Prognostic hydrophysical fields are results of forecast by the basin-scale model of MHI and 2-D meteorological boundary fields represent the results of forecast by regional atmospheric model ALADIN. All these fields are given on the grid of basin-scale model with 5 km spacing and with one-hour time step frequency for the integration period. The analysis of predicted Correspondence to: D. I. Demetrashvili (demetr 48@yahoo.com) fields shows that to use the model with high resolution is very important factor for identification of nearshore eddies of small sizes. It should be noted the very different character of regional circulation in summer and autumn seasons in the easternmost part of the Black Sea.

An operational model for the West Iberian coast: products and services

“…Several operational platforms combining data gathering and modelling systems have been produced or upgraded in the progress of such projects (e.g. Zhuang et al, 2011;Stanev et al, 2011;Kordzadze and Demetrashvili, 2011;Korotaev et al, 2011).…”

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“…Comparison of Calculated forecasts of the hydrophysical fields (flow, temperature and salinity) in the Georgian Black Sea coastal zone to the natural data has shown ability of the RM-IG to predict really dynamical processes in the Georgian coastal zone (Kubryakov et al, 2006;) At present we carry out comparison of simulated SST with satellite images SST derived from NOAA (http://dvs.net.ua/mp). The analysis of results of comparison show that the quantitative difference in many cases does not exceed 0.6-0.8°C (Kordzadze and Demetrashvili, 2011).…”

An operational biogeochemical model of the North-East Atlantic: Model description and skill assessment

“…Holt et al, 2003;Elliott et al, 2007;Siddorn et al, 2007;Korotaev et al, 2011;Kordzadze and Demetrashvili, 2011;Stanev et al, 2011;Zhuang et al, 2011;Mateus et al, 2012), few models routinely produce forecasts of the biogeochemical fields (e.g. Siddorn et al, 2007;Mateus et al, 2012;Wan et al, 2012).…”