Green hole
Coordinates: 47 ° 49 ′ 13.2 ″ N , 15 ° 2 ′ 42 ″ E
The green hole is one at 1270 m above sea level. A. lying sinkhole on the Dürrenstein plateau of the Ybbstal Alps in Lower Austria . The sinkhole, which is around 500 meters in diameter, has a height difference of around 50 meters at the lowest saddle, the Lechnergraben. The bottom of the sinkhole is only about 100 meters in diameter.
Temperature extremes and local climate
In the past, extremely low night temperatures were measured here. Therefore, the green hole is considered to be the cold pole of Austria or even Central Europe . A temperature of -52.6 ° C was measured in this sinkhole on February 19, 1932. Current series of measurements also confirm the extreme temperatures that prevail in the green hole; on December 25, 2003 the temperature was −47.1 ° C.
The reason for these extreme temperatures is the topographical situation: Due to the boiler-like location, an inversion weather pattern often forms . However, record values only occur very rarely when, in addition to arctic cold air that collects in the boiler, a clear sky intensifies the energy radiation and there is no wind.
The vegetation is similar to that of the tundra . Only plants can survive here that are completely covered by a blanket of snow in winter and are thus isolated from the cold of the cold air lake.
history
During the Second World War , there was a Wehrmacht test station here , where vehicle engines were tested for their suitability for warfare in Siberia . Some heavily rusted relics from that period can still be seen today.
gallery
The meteorological measuring station at the lowest point of the sinkhole
The remains of the Wehrmacht experimental station from World War II
See also
- Funtensee (cold pole of Germany)
Web links
- Tour description , on wetterzentrale.de
swell
- ↑ Manfred Dorninger: The green hole. ( Memento of the original from June 4, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Institute for Meteorology and Geophysics, University of Vienna, lecture November 29, 2003 (pdf; 1.89 MB).
- ↑ Austria's secret cold pole is not yet in top form. In: Wiener Zeitung online, February 3, 2012.
- ^ Bernhard Pospichal: Structure and resolution of temperature inversions in sinkholes using the example of Grünloch . ( Memento of the original from December 22, 2015 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Institute for Meteorology and Geophysics, University of Vienna, diploma thesis October 2004 (pdf; 3.86 MB).
