Posted on 11/07/2014 by Honora
Modelling support for aerosol measurements in Greece
CHARADMexp campaign has been supported on daily basis from several modelling services operating at the BEYOND Center of excellence (http://beyond-eocenter.eu/) of the National Observatory of Athens (NOA) and partners such as the Barcelona Supercomputing Centre (BSC) and the UK Met Office. Model simulations and related forecasts that were utilised to consolidate the measurement strategy are described below.
Realtime fire monitoring system based on MSG/SEVIRI (NOA)
Satellite images are acquired every five minutes and are automatically processed to identify wildfire hot spots. The final refined product is at a horizontal resolution of 0.5×0.5 km. This information is provided through an online GUI at NOA/BEYOND realtime platform: http://ocean.space.noa.gr/seviri/fend_new/index.php .
Smoke dispersion forecasts (NOA)
A prognostic tool for the dispersion of wildfire smoke is also provided online at the BEYOND site. This forecasting tool is built on a synergy betweenMSG/SEVIRI fire hot spot identification and WRF/FLEXPART smoke dispersion simulations.
Prognostic back-trajectories (NOA)
Forecasting back-trajectories are producedat 12 hour intervals for the measuring stations. The trajectories are routinely computed from the FLEXPART Lagrangian dispersion model driven by WRF forecasts. This informationprovides a first hint to the operating scientists about the origin of the air masses that are expected to arrive at various heights over the site. Finokalia station is located at a cross-road of air mass paths, resulting in complex air quality mixtures that include sea-salt, desert dust, biomass smoke particles and anthropogenic pollutants.
Meteorological and dust forecasts (BSC, NOA)
Early warning for the arrival of desert dust particles at various atmospheric heights is essential for designing the measurement strategy. These dataare provided by the NMMB dust model from BEYOND twining partners at the Barcelona Supercomputing Center. Additionally, daily WRF meteorological forecasts are provided on site, including station meteograms and wind charts at various heights. This information is of particular interest for the planning of UAV operations.
Realtime dust AODs from MSG-SEVIRI (UKMO)
Realtime satellite information for dust AOD is provided by the BEYOND twining partners at U.K. Met Office. Satellite data are gridded on a 0.18°×0.18° grid over land and is an indicator of dust in the atmosphere. Satellite AOD images together with dust forecasts and FLEXPART back-trajectories are used by the experimental scientists for the dissemination and interpretation of their measurements.
First test of PollyXT lidar instrument (TROPOS)
APollyXT advanced lidar system is developed in the framework of BEYOND in collaboration with TROPOS. A predecessor of the specific lidar was transported to Crete where it is used for the first time in the frame of CHARADMexp.