Reduced array detections at Gräfenberg stations caused by wind turbine noise
| Autor: | Stammler, K., Ceranna, L., Donner, S. |
|---|---|
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-3366 |
| Popis: | The Gräfenberg array situated in the Frankonian Jura in Germany is the first digital broadband array on earth delivering continuous waveform data since almost 50 years. Besides its outstanding status in global seismology it is also National Technical Mean in the frame of the Comprehensive Test Ban Treaty since it recorded many nuclear explosions since the 1970ies from all known nuclear test areas. The high sensitivity of the array could be retained for many decades, only recently the detrimental influence of wind turbines (WT) in the area substantiated. Even though the individual stations since 2016 are protected by a WT tabu zone of 5 km radius around each location an increasing wind dependence of the array detections has been found. Comparisons of FK detection statistics of the year spans 2001-2007 (before WT installations) and 2015-2021 (after WT installations) show that about 13% of the detections are lost due to WT generated seismic noise, when averaging over all times. At high wind speeds the loss rate can be as high as 40%. This is caused by a few WTs installed inside the protection zone before 2016 and intensified by the large number of WT installations in distances larger than 5 km from the station locations. Due to the intended increase in wind power installations in Germany a further degradation of the array sensitivity can be expected. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|