1. Lightnings Elisabeth Lamprecht Comenius 2010 1

2. List of contents 1.ALDIS: history, tasks and products 2.EUCLID 3.Lightning radar: radar positions national and international, how it works 4.Beginning of lightning 5.Different kinds of lightning 6.Statistical evaluation, visualising 7.How to behave during lightnings 2

3. ALDIS ALDIS: Austrian Lightning Detection and Information System Cooperation of OVE (Austrian Union of Electronics), Siemens and the federation of locating and documating lightnings in Europe ALDIS delivers exact lightning facts to weather services, insurance companies, experts and energy supply companies. ALDIS was put into operation in 1992, after one year of testing. Since that ALDIS has registered storm activities all over Austria and has saved these information in a data bank. 3

4. EUCLID EUCLID: EUropean Cooperation for LIghtning Detection EUCLID is a cooperation of different lihghtning detecting companies all over Europe. Members: Austria, Hungary, Germany, France, Finland, Luxembourg, Belgium, the Netherlands, Switzerland, Slovenia, Italy, Poland, Norway, Sweden, Denmark, … 4

5. Lightning-radar-national In Austria there are 8 so called LS7000 sensores, that register the lightning activities. The measured information is send digitally to a lihtning processor. Each sensor has a registering radius of 400 km. Consequently every lightning signal is registered by at least 4 sensores. The exactness of measurement is about 100 m. 5

6. Lightning-radar-international The 8 ALDIS-sensores are integrated in the European EUCLID-net. The picture on the right shows all lightning sensores in Europe (red points). 6

7. Lightning-radar-How it works more information: time, polarisation (positiv or negativ), power amplitude kA. For calculating the location of the lightning you have to use trigonometry. 7

8. Beginning of lightning The lightning discharge has its origin in the charged storm cloud. Within the storm cloud the vertical wind produces a separation of charges. The discharge follows 3 steps: leading lightning, catching discharge, main discharge. 8

9. Different kinds of lightning Cloud-cloud-lightning Cloud-ground-lightning Ground-cloud-lightning Positive and negative lightning Kugel-lightning Elms-fire Line-lightning Area-lightning 9

10. Statistical evaluation In the picture the average lightning activity during 1992 and 2001 is shown. There are important regionally differences. 10

11. Statistical evaluation 11

12. How to behave during lightning 12

13. Thanks for your attention 13

14. Quellen www.aldis.at www.euclid.org 14