“Exceptional” and never observed levels of rain were reached in 2021 in the French Amazon, in Guyana, according to Météo-France readings.
2021 has been the “wettest year” observed in Guyana since the start of meteorological observations in the 1980s, according to a recent Météo-France newsletter.
In twelve months, nearly 5,600 mm of rain fell on average in Guyana, more than twice the seasonal norms (+ 58%).
This rainfall is equivalent to six years of rain in Quimper.
Guyana 🇬🇫 🌧️ |
2021 was the wettest year observed in the territory since the start of meteorological observations in the 1980s.
In twelve months, nearly 5,600 mm of rain fell on average: a rainfall which is equivalent to six years of rain in Quimper .
pic.twitter.com/xCvKUpM1sL
- Météo-France (@meteofrance) December 30, 2021
Several causes
The bad weather caused various emergency situations: washed away bridges, destroyed roads, flooded neighborhoods, mudslides.
An exceptional flood of the great Maroni river, which separates Suriname and Guyana, had been exceptionally recorded for two months, from April to June 2021. At least two states of "natural disaster" have been recognized by the Minister of the Interior during the year.
Météo-France experts explain these bad weather marked by the conjunction of two phenomena: the appearance of the oceanic phenomenon "la Niña", traditionally associated with excess rainfall, followed by the formation of "a pocket of more surface water. warmer than normal ”over the Atlantic Basin.
These two phenomena caused in Guyana an absence of the usual pluvial truce in March, an extension of the “great rainy season” and the virtual disappearance of the dry season usually felt in summer.
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