Objectives

The present project offers a specific analysis of remote acoustic sounding data in a coastal area that not only contribute to the improvement of participant professional skills but also prepare specialist that can use modern technologies for more accurate forecasts with strong scientific background of the complex vertical structure of the ABL in the coastal zone. Such a potential is difficult and long-lasting to build, and it is particularly necessary for society.
The main goal of the project is to use modern remote sensing technology for measurements of profiles of wind and turbulence (MFAS SCINTEC sodar) through which to achieve new knowledge and identify a real picture of the vertical structure of the coastal ABL during different weather conditions (wind flow from different direction, calm weather, and various meteorological phenomena) in the area of the town of Ahtopol with high spatial and temporal resolution. For specific meteorological situations (periods) with sufficient data availability in space and time, the mesometeorological WRF model will be validated against observations through correlations between five pairs of measured and modelled wind field variables (wind speed, wind direction, and wind vector components). As a measure of linear correlation between two random variables Pearson correlation coefficient will be used.

Specific goals:

* development of a database of all measured by the sodar characteristics (wind and turbulence profiles) in the region of the town of Ahtopol for an eight-year period (August 2008 – October 2016), required for determining the different types of weather conditions;
* analysis of the different weather situations and selecting of appropriate periods with representative meteorological conditions for the study coastal area to focus further research on evaluation of the numerical model performance;
* configuring and initializing WRF for the selected periods with different types of weather conditions;
* interpolation of the model output to the levels of sodar measurements;
* correlation analysis of measured by sodar and modeled pairs variables.
*analysis of time variability and variation in height of calculated correlation coefficients;
* deriving of averaged characteristics of wind field and turbulence under similar weather conditions, as well as their dispersions using sodar data;  

Expected results:

– for the first time detailed annual, seasonal, and monthly statistical analysis of wind profiles and turbulence data at the Bulgarian Black Sea will be performed for almost eight years period;
– new knowledge will be acquired for the wind and turbulence in height with high spatial resolution in the studied complex region;
– specific situations with coastal events will be identified in different groups of appropriate meteorological situations registered by the remote acoustic sounding of the atmosphere at EP Ahtopol;
– the mesometeorological model WRF will be evaluated for selected cases from predefined appropriate coastal events at the Bulgarian Black Sea;