Many Ghanaians have expressed concern about latest heavy rains in some components of the country, however the Ghana Meteorological Agency’s Chief Forecaster says it is not a new phenomenon.
According to Fecility Ahafianyo, La Niña is a international climate phenomenon related to moist seasons in Western and Eastern Africa.
La Niña refers to the periodic cooling of sea-floor temperatures throughout the east-central equatorial Pacific – an oceanic and atmospheric phenomenon, that is the colder counterpart of El Niño, as a part of the broader El Niño–Southern Oscillation (ENSO) local weather sample.
La Niña climate is a sample that happens within the Pacific Ocean. In this sample, robust winds blow heat water at the ocean’s floor. As the nice and cozy water strikes, chilly water from the deep rises to the land floor wealthy in moisture appropriate for rain cloud formation.
“When we have a La Niña phase, we have wet conditions in most of west and east Africa,” she explained.
“According to available data,” Felicity told JoyNews Mahmud Mohammed-Nurudeen, the phenomenon is not new, however “in terms of intensity, people should be concerned.”
She said that each wet season has its personal variations, and this is one of many 2022 anomalies.
According to the World Meteorological Organization, there have been 24 cases of La Niña since 1951, with the strongest being in 1982-83, 1997-98, and 2015 – 16.
The most up-to-date La Niña occurred in 2020-21, and it was average, comparable to the primary incident in 1951-52.
According to Felicity, the La Niña strengthened in the course of June and is anticipated to weaken in April 2023.
This implies that the country is seemingly to experience frequent rainfall patterns throughout these instances.
“This year, we have a good rainy season during the main cropping season, and the La Niña intensity is about 91-94%.”
However, one main challenge is that its depth could cause flash floods, threatening farmers’ livelihoods and other activities.
Some crops that do not require a lot of rain may be harmed, in accordance to Felicity, and “that’s what we should be looking out for during the period.”
Felicity additionally mentioned El Nino, which prompted drier climate circumstances in the course of the 2018-2019 main wet season. Longer dry spells shortened the cropping season.
El Niño refers to above-common sea-floor temperatures that happen on a common foundation throughout the east-central equatorial Pacific. It represents the ENSO cycle’s heat section.
The 1997-1998 El Niño occasion was adopted by a extended La Niña section that lasted from mid-1998 to early 2001. El Niño/La Niña occasions alter the chance of particular local weather patterns around the world, however the outcomes are by no means an identical.
She suggested Ghanaians to keep up to date on GMet climate updates so as to plan their activities.