The Australian government declared this Tuesday the appearance of the “La Niña” phenomenon in the tropical Pacific for the second consecutive year, which will cause more abundant rains than usual in most of Australia, temperatures cooler and greater possibility of cyclones tropical
“The climate models suggest that La Niña will have a short life and it will persist until well into the summer in the southern hemisphere or until the fall of 2022 “(between January and March), said in a statement the Australian Bureau of Meteorology.
Increase in cyclones
Andrew Watkins, director of the meteorological office, said that La Niña “increases the chances of cooler than average temperatures during the day in much of Australia and may increase the number of tropical cyclones“.
“Consecutive La Niña phenomena they are not unusual“said Watkins, who noted that the last time this phenomenon occurred two years in a row It was between 2010 and 2012, when Australia suffered floods caused by the highest rainfall in its history.
This climatic phenomenon caused floods in Australia last year that displaced thousands of people, since it is characterized by causing lower temperatures than usual and more abundant rainfall, especially in the east, north and center of the country.
Increase in temperatures
La Niña is the coldest temperature phase within the El Niño-Southern Oscillation climate cycle, which has at the other extreme the El Niño phenomenon in the warm phase and also has a third neutral phase.
The meteorological agency also warned that climate change “continues to influence the global and Australian climate” and recalled that temperatures have increased by 1.44 degrees between 1910 and 2019 and the rains in the wet season (October-April) have increased in the last twenty years.
In this sense, he indicated that in recent decades there has been “a trend towards a higher proportion of high intensity and short duration rains, especially in northern Australia. “Both El Niño and La Niña expand from the tropical regions for several months and cause variations in global temperatures and rainfall.