Whose wave is Brazil in the grip of? HeatHeat Groundbreaking and above all, sustainable. After experiencing the hottest July and August on record, as well as several record-breaking Septembers and Octobers, northern South America is facing deadly heat. This part of the world is currently in spring, and recorded temperatures in recent days have exceeded 40°C: Salinas recorded 42.7°C on November 19, the highest ever recorded in the city all season. The temperature has been recorded. This unusual heat is not an isolated case on the South American continent: over 40 °C in Mexico last weekend and over 30 °C above 2,000 meters above sea level, as in Peru, where a monthly record of 39 °C was recorded. Was. Saturday in Tarapoto.

Feeling deadly due to heat and humidity

The Brazilian capital Rio de Janeiro has been in the news in recent days for feeling almost 60 degrees Celsius in the poorest areas: this is clearly not an increased temperature, but a calculation of the feeling. The heat index takes into account the actual temperature (42 degrees Celsius in Rio on Saturday) and air humidity. Other versions of this index also take solar radiation into account: this is how this staggering value of 58.5°C was calculated. Such sentiments lead to the threat of death, led by singer Taylor IntenseIntense canceled his concert in the capital on Saturday. A few hours ago, a young fan died heart failureheart failure After getting heat stroke in the auditorium.

This part of South America has been experiencing almost continuous anticyclonic interruptions for 4 months, causing drought and fires. except for Global warmingGlobal warmingThe situation is typical of the current El Niño climate phase, but is even more severe this year: during years BoyBoyThe north of Brazil is affected by hotter and drier weather, while the south of the country is affected by more rainfall and therefore FloodsFloods,

The heat in South America is incredibly extreme and the world is looking elsewhere

article from carine durandcarine durandWritten on October 20, 2023

A historical event has been happening for monthsSouthern hemisphereSouthern hemisphere And the world looks somewhere else. Raging wildfires have made the news in Canada, but in the south, while the situation may be less dire, it is just as devastating. South America has been experiencing incredibly extreme heat since the beginningwinterwinter,

Temperatures above 35 °C and locally above 40 °C have been recorded almost daily since June and this extreme heat currently continues into early spring. There are extreme temperatures in central and northern Brazil, drought in the Amazon and forest fires. On August 22, a high of 45 °C (16 °C above seasonal normal) was reached in Villamontes, Bolivia, making this the highest temperature ever recorded in the entire Southern Hemisphere in mid-winter. However, recorded temperatures actually represent only a known fraction of current phenomena: few weather stations exist in remote areas, and even more extreme temperatures are likely.

Heat is 100 times more likely to occur due to climate change

The World Weather Attribution Organization has just released the findings of their study on the cause of this major event: Record temperatures in Brazil, Argentina, Paraguay and Bolivia have been described as “”. impossible in a world without climate change linked to human activities”, Climate change has made this long-lasting heatwave at least 100 times more frequent and 1.4 to 4.3 degrees Celsius warmer.

If global temperatures rise by +2 °C compared to pre-industrial times, this type of heat wave will be five times more likely to occur again, even at higher temperatures (1.1 to 1.6 °C on average. More).

There is a heat wave in South America in the middle of winter!

Article by Carine Durand, published August 29, 2023

South America is going through one of the worst heat waves in its history, with temperatures 10 to 20 degrees Celsius above normal. how to explain it like this anomaliesanomalies Weather report?

After 41.8 °C was recorded in Cuiabá, Brazil in mid-August, the Chilean Andes experienced temperatures of 38 to 39 °C, while the normal temperature is around 18 °C. in recent times MercuryMercury Went up again:

  • Temperature in San Joao Piaui, Brazil 40.2°C;
  • 39°C in Nava, Colombia;
  • 39°C in Tarapoto, Peru;
  • 38.5°C in Barra, Brazil;
  • The temperature in Mabruna, Guyana was 35.8 degrees Celsius.

Brazil, along with Chile, Argentina and Paraguay, is currently one of the regions most affected by this extreme heat. The month of July was the hottest recorded in Brazil in more than 60 years (the beginning of weather records).

Two events cause this overheating

behind this a heat wavea heat wave In winter, we surprisingly see the same weather phenomenon that has caused extreme heat in Europe and Canada in recent weeks: a heat domeheat dome, associated with frequent anticyclonic interruptions since the beginning of the southern winter. If, at the beginning of winter, the warming El Niño event had little impact because it was still very weak, it has strengthened in recent weeks. This is now starting to affect the weather in South America: El Niño phases result in warm winters in this part of the world, but not necessarily record winters. So South America faces two sources of warming: what is coming broadcastbroadcast Of green house gasgreen house gas First that increases the intensity of heat domes, then increases as a result of El Nino.

38 degrees Celsius in winter: Incredible temperature recorded in South America!

Article by Carine Durand, published August 3, 2023

It seems that the weather in Chile, Argentina and even Brazil has been bad for about three weeks. Temperatures in South America have reached nearly 40 degrees Celsius in recent days, even though this region of the world is currently in the middle of winter!

The temperature in Buenos Aires on the 1st was 30°CIs August, when the average temperature is 14°C. The mercury rose to 38 degrees Celsius in Rivadavia and is likely to reach the 40 degrees Celsius mark in the coming days. Incredible values ​​of 30 to 35 °C have been recorded between 1,000 and 1,400 meters above sea level in the Andes. Some places broke their absolute heat records (all months combined!): This means that in these cities, temperatures were even higher in winter than in summer!

Natural variability, global warming or El Nino?

How can we explain such heat at the “bad time of year”? A heat dome has been blocking the south of the American continent since mid-July, linked to a powerful anticycloneanticyclone, Despite some ups and downs, the heat may persist in recent days.

The difference with other heat domes of 2023 that have marked the news, such as those in Southern Europe (Italy, Greece, Algeria, etc.), is that it occurs in the middle of winter in South America. The month of August corresponds to the month of February in the Southern HemisphereNorthern hemisphereNorthern hemisphere, A thermal anomaly that is most likely increased by global warming and to a lesser extent by the El Niño phenomenon, which is still too weak to play a significant role in this winter heat wave.

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