In Sweden, there are three research stations of the same caliber.
The southernmost one is outside Perstorp and has a 150 meter high mast that measures various greenhouse gases in the air.
During Tuesday evening, unusually high doses of a particular greenhouse gas were measured.
- We see an increase in methane gas concentration and we know that the air currents have come from the Bornholm region.
But we cannot say with one hundred percent certainty that it originates from there, says Tobias Biermann, research engineer at the Hyltemossa research station.
Similar observations in other localities
About twelve hours earlier, elevated levels of the same gas were measured at the research station in Uppsala.
- It is quite an interesting coincidence that when we look at the air masses and how they have traveled to get here, we can see that they have passed the Baltic Sea around Bornholm.
Therefore, there is a high probability that the methane gas in the air masses comes from the leaks, says Tobias Biermann.
Therefore, there is much evidence that the gas clouds that are now measured independently at two research stations just hours apart originate from the gas leak in the Baltic Sea.
Could come from elsewhere
The methane gas can also originate from other emissions, for example from agriculture, although, according to Tobias Biermann, there is much evidence that it is the Russian gas that is now spreading over Sweden.
He also believes that in a global perspective it is not about any large amounts that have passed, but that it is a lot from a local perspective.