Research

Meteorology and Hydrology

Incorporating meteorological and hydrological observations and modelling with emphasis on extreme hydrometeorological events and the study of surface and underground water bodies.

Challenges and necessity

It is well known that weather affects significantly the safety and economic well-being of citizens. Therefore, there is a strong need to better monitor and forecast weather and resulting hazards with emphasis to the hydrological ones (e.g. river floods, flash floods) and develop the appropriate methodologies. Moreover, there is a need for a comprehensive dissemination of relevant products (observations and forecasts) to the general public, permitting thus to convey the requested information to the potential end-users at a timely and efficient manner.

Research activities

Meteorology
Hydrometeorology
Hydrology
    • Numerical weather prediction (including operational weather forecasting, model validation, model output statistics, exploration of assimilation methods for the improvement of forecast skill, ensemble regional weather forecasting).

    • Study of the dynamical and physical properties of atmospheric weather systems in the Mediterranean with emphasis on high impact weather (flash floods, intense cyclogenesis, severe weather events, spatial and temporal variability of rainfall).

    • Study of the lightning activity mainly in the Mediterranean: lightning activity in relation with physiographic characteristics, cloud microphysical properties and rainfall, lightning as a nowcasting tool and lightning data assimilation in numerical weather prediction models).

    • Weather radar applications including participation in field experiments.

    • Investigation of air-sea interaction processes and especially atmospheric near sea turbulence and wind-wave interaction.

    • Analysis of the societal impacts of adverse weather events over Greece.

    • Flood forecasting, application of watershed models, predictions in ungauged basins and reverse flood routing, estimation of the water budget over basins based on hydrological models.

    • Operation of small weather radar and provision of measurements as input to hydrological models for flash flood forecasting.

    • Identification of flood high risk zones.

    • Monitoring and observation of coastal and dams water quality.

    • Turbulence modelling: development of one-point field equations model, with the proper viscoelastic character, for engineering use.

    • Study of aquifer systems: seawater intrusion in coastal aquifers, flow in sloping unconfined aquifers and stream-aquifer interaction, optimal management of coastal aquifers.


Operational activities, infrastructure and services

  • Establishment and operation of weather related monitoring stations such as: (a) a first class meteorological station at Thissio (since 1900) and an actinometric station at Thissio (since 1953) and Penteli (since 1998); (b) a network of automated weather stations, transmitting in real-time (~ 255 stations by the end of 2013); (c) a VLF lightning detection network (ZEUS) with 6 receiving antennas over Europe.

  • Installation and operation of telemetric state-of-the-art hydrometric networks and snow height meters.

  • Participation in experimental campaigns with an X-band mobile Doppler polarimetric radar and in-situ portable precipitation measurement equipment (disdrometers and rain gauges).

  • Operational weather and wave forecasting (forecast maps are provided at http://www.noa.gr/forecast and www.meteo.gr which is the 2nd web page in terms of visitors among all Greek web pages.


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