The Korean Peninsula is once again experiencing a 'double heat dome.' Two high-pressure systems are simultaneously exerting pressure on both the upper and lower atmosphere, leading to extreme heat and tropical nights across the country.
According to the Korea Meteorological Administration, the primary cause of this heat wave is the 'double high-pressure system' dominating both the upper and lower atmosphere.
At approximately 10 kilometers above sea level, the hot and dry Tibetan high pressure has expanded its influence over the Korean Peninsula. Meanwhile, the lower atmosphere is being enveloped by the warm and humid North Pacific high pressure, which is drawing moisture from the south.
The two massive high-pressure systems are compressing the Peninsula like a thick blanket, trapping heat generated at the surface and intensifying the heat dome effect.
Within the high-pressure area, strong descending air currents are occurring. As the air descends, it compresses, causing temperatures to rise further, while cloud formation is suppressed, allowing strong sunlight to directly heat the surface. This is why daytime temperatures remain high and do not drop significantly at night, leading to tropical nights.
Weather experts warn that with the simultaneous dominance of the Tibetan high pressure in the upper atmosphere and the North Pacific high pressure in the lower atmosphere, it will be difficult for temperatures to decrease in the near future. They advise that with perceived temperatures reaching between 33 and 35 degrees Celsius, outdoor activities should be minimized, and special attention should be paid to health management to prevent heat-related illnesses.
So when can we expect relief from this oppressive double heat dome?
Experts predict that cracks in the double heat dome structure will begin to form in early September, as the influence of the Tibetan high pressure weakens and cold air from the north starts to descend.
However, during the process of the heat dome dissipating, there is a possibility of strong clashes between the cold air from the north and the warm air from the south, which could lead to heavy autumn rains or sudden showers in early September.
Afterward, typical autumn weather, characterized by lower humidity and cool breezes in the mornings and evenings, is expected to emerge in mid-September.
The Korea Meteorological Administration cautions that until the transition period when the heat dome is lifted, sweltering heat and tropical nights exceeding 33 degrees Celsius may continue, necessitating ongoing vigilance regarding health management.
* This article has been translated by AI.
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