TIME.CO, Jakarta – Temperature Dry season heat continues to hit Indonesia. Climatological Station of the Agency of Meteorology, Climatology and Geophysics (BMKG) Central Java recorded the highest air temperature of 38°C during October 12-October 13, 2023, while Ahmat Yani weather station recorded the highest temperature of 37.4°C.
Didi Satiadi, researcher at the Climate and Atmosphere Research Center, National Agency for Research and Innovation (BRIN), said several factors have caused relatively high temperatures this week. “The Indonesian region, especially the southern part, is currently experiencing a dry season,” she said in a short message on Sunday, October 15, 2023.
Besides that, Indonesia is experiencing El-Nino phenomenon and positive IOD. When these two phenomena occur at the same time, Indonesia usually experiences a drier than usual dry season.
Daily maximum temperature in Indonesia on October 12-13, 2023 at 07:00 WIB. (Instagram/@infobmkg)
He said that, under such conditions, the amount of water vapor and cloud growth tend to be minimal. Low cloud cover allows solar radiation to reach the earth’s surface without any obstacles and causes high temperatures during the day.
Data from sadewa.brin.go.id shows the total amount of water vapor over Indonesia with drought conditions over southern Indonesia, including Palembang (30% humidity) and Central Java (40% humidity).
Additionally, the apparent position of the Sun shifts from the northern to the southern hemisphere and crosses the equator on September 23, 2023, a day called the equinox. Due to the phenomenon of hysteresis, heat radiated from the Earth’s surface is usually delayed and reaches a maximum about one month after the equinox. “It’s no surprise that it’s warmer now,” he explains.
Another thing is the impact of the growing phenomenon of global warming and climate change, which will cause temperatures in 2023 to reach record levels.
Didi said the Indonesian region is also currently facing a transition season in which the Australian monsoon will start to weaken and local heating will increase, especially in the afternoon/evening.
“Although the amount of water vapor tends to decrease during El-Nino and positive IOD, atmospheric disturbances can cause strong convection, as well as cloud growth and rain accompanied by lightning,” he said.
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