As already we rememberedin the first week of September, an interesting observation took place over the Polish seaside. The SatBałtyk system showed that while the water temperature reached 21 degrees Celsius in many places, in some places it dropped to almost 13 degrees. It turned out that the reason for this change was the so-called upwelling phenomenon.
Baltic water is locally cooler. It is affected by a “cold bubble”
– As for the Baltic upwelling, it is dictated by winds from the east. The air has to move along the coast and then it moves the water masses. We do not see this because these are very slow movements and the wind does not have to blow very strongly – he commented for Polsat News Prof. Bogdan Chojnicki from the University of Life Sciences in Poznań. – In such a system, when the wind blows from the east, the turbulence pumps water from lower depths, from those where the temperature is lower.
So far, water temperature changes due to upwelling – also called the “cold bubble” – have been recorded in September in Darłowo, Kołobrzeg and Władysławowo.
The Vistula River has broken the inglorious record for water height. It has never been this low
How we informed On September 9, the Institute of Meteorology and Water Management reported that at the Warsaw-Bulwary station the water level in the Vistula reached only 24 cm. This broke the record for the lowest height.
Many Polish rivers are currently struggling with lower water levels, and IMGW has issued hydrological warnings against drought. Let us recall that the problem has been present in our country continuously since 2015. According to the Institute's hydrologists, this difficult situation will improve soon, when a colder front and rainfall return to Poland.