Jakarta, domclub Indonesia
—
Meteorology, Climatology and Geophysics Agency (
BMKG
) reveals the reasons
rain
occurring more frequently in a number of regions in Indonesia at the end of this year.
BMKG Deputy for Climatology Ardhasena Sopaheluwakan explained that currently Indonesia is experiencing quite special conditions where two phenomena occur simultaneously, namely weak La Nina and negative IOD.
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According to him, the Pacific Ocean is currently experiencing a weak La Nina phenomenon with an index of -0.77 at the end of November, which is characterized by the cooling of the Central Pacific region.
Then there is also the negative Indian Ocean Dipole (IOD) phenomenon with an index of -0.83, which was detected in the western Indian Ocean, which causes the sea to be colder than the eastern Indian Ocean near Indonesia.
“This background condition is what causes Indonesia to experience quite a lot of rain,” said Ardhasena in the online Climate Outlook 2026 press conference, Tuesday (23/12).
Ardhasena said that Indonesia’s climate is greatly influenced by the surrounding seas, so to get an indication of the country’s climate in the future, it is necessary to look at a larger area.
The areas routinely monitored by BMKG are the Pacific Ocean to the east of Indonesia and the Indian Ocean to the west.
With the presence of a weak La Nina and a negative IOD, Indonesia is flanked by cold conditions, but the Indonesian region itself is very warm.
The surface temperature anomaly, said Ardhasena, was more than 2 degrees Celsius, so it released a lot of heat and ultimately experienced a lot of rain.
“The anomaly in sea surface temperature is more than 2 degrees Celsius, so we release a lot of heat, we also experience a lot of rain, so currently Indonesia has hot seas,” explained Ardhasena.
“With the geographic configuration of many mountains, it’s like
steam engines
“which helps regulate climate conditions in the world,” he added.
(lom/dmi)
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