engleski

Benefits of super rapid scan satellite data usage for utilization of satellite-based indicators of storm severity

Monitoring of convective storms which often produce hazardous weather on the ground in many cases heavily rely on satellite remote sensing observations from geostationary satellites. Not only due to a good spatial coverage, but especially in case of short term features on the top of the convective clouds, due to ever enhancing temporal resolution of such data. Many of storm top features that may indicate severe storms have a relatively short lifetime. For instance, some overshooting tops last less than 5 minutes, what is observed using the 5-minute rapid scan data. Some preliminary results over the Europe region have shown many benefits of rapid scanning (time step of 5 minutes) and super rapid scanning (time step of 2.5 minutes) with SEVIRI instrument onboard MSG satellites for the nowcasting purposes. In this work special attention will be given to a quantitative assessment of connection between higher temporal resolution and better depiction and description of satellite-based indicators of severe weather events (for instance overshooting tops, cold ring and cold U/V). It will be observed what is the best information that can be obtained by moving gradually form 15 to 5, and to 2.5 minute time step. Benefits of using rapid scan satellite data in understanding of microphysical properties, genesis, duration and evaluation of storm top features and convective storm itself will be analysed.

satellite data; super rapid scan; storm severity

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