What is a heat dome? Phenomenon in Argentina could affect Brazil | Climate

What is a heat dome? Phenomenon in Argentina could affect Brazil | Climate
What is a heat dome? Phenomenon in Argentina could affect Brazil | Climate
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One heat wave in Argentine significantly raised temperatures, raising a warning signal, including for the country’s agriculture. This Wednesday (1/2), the National Meteorological Service (SMN) issued a red alert due to the thermometers are expected to reach 45 °C in some regions, mainly in the Center and North.

The current condition is influenced by the formation of a heat dome that reaches the center of South America. According to the SNM, the phenomenon is considered very dangerous and can “affect all people, including healthy people”.

What is a heat dome?

O heat domealso called dome or heat bubbleis created when an area of ​​high pressure remains over the same region for days or even weeks, trapping very hot air underneath, “just like a lid on a pan”, explains a Metsul report.

The hot air dome acts by deflecting weather systems, such as possible cold fronts, making temperature changes impossible. “As the high pressure system settles in a given region, the air below heats the atmosphere and dissipates the cloud cover,” he adds.

Could the phenomenon affect Brazil?

In September last year, Brazil experienced the phenomenon. At the time, the hot air bubble operated between Paraguay and the Brazilian Center-West, registering record temperatures above 40 °C in several regions of the country. In 2024, according to MetSul, the heat wave in Argentina could affect Brazil, mainly Rio Grande do Sul, a country that borders the brothers.

2 of 2 How the phenomenon called the heat dome works — Photo: NOAA/ Disclosure
How the phenomenon called the heat dome works — Photo: NOAA/ Disclosure

“However, there are no forecasts as extreme as those recommended for Argentina, nor are there any heat levels as we have seen in the past”, say the experts.

The hot air mass should generate more intense heat in the western half of RS, with maximum temperatures of 39 °C predicted. On the western border, temperatures can reach 40 °C.

The article is in Portuguese

Brazil

Tags: heat dome Phenomenon Argentina affect Brazil Climate

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