PARIS: Skywatchers along a narrow band from west Africa to the Arabian Peninsula, India and southern China will witness on Sunday the most dramatic “ring of fire” solar eclipse to shadow the Earth in years.
Annular eclipses occur when the Moon — passing between Earth and the Sun — is not quite close enough to our planet to completely obscure sunlight, leaving a thin ring of the solar disc visible.
They occur every year or two, and can only been seen from a narrow pathway across the planet.
Remarkably, the eclipse on Sunday arrives on the northern hemisphere’s longest day of the year — the summer solstice — when Earth’s north pole is tilted most directly toward the Sun.
The “ring of fire” will first be seen in northeastern Republic of Congo at 5:56 local time (04:56 GMT) just a few minutes after sunrise.
This is the point of maximum duration, with the blackout lasting 1 minute and 22 seconds.
Arcing eastward across Asia and Africa, it will reach “maximum eclipse” — with a perfect solar halo around the Moon — over Uttarakhand, India near the Sino-Indian border at 12:10 local time (6:40 GMT).
More spectacular, but less long-lived: the exact alignment of the Earth, Moon and Sun will be visible for only 38 seconds.
“The annular eclipse is visible from about two percent of Earth surface,” Florent Delefie, an astronomer and the Paris Observatory, said.
“It’s a bit like switching from a 500-watt to a 30-watt light bulb,” he added. “It’s a cold light, and you don’t see as well.”
Animals can get spooked — birds will sometimes go back to sleep, and cows will return to the barn.
The full eclipse will be visible somewhere on Earth during just under four hours, and one of the last places to see a partially hidden Sun is Taiwan before its path heads out into the Pacific.
People hundreds of kilometers on either side of the centerline across 14 countries will also see light drain from the day, but not the “ring of fire.”
Weather conditions are critical for viewing.
“Good weather is the key to successful eclipse viewing,” astrophysicist Fred Espenak, an expert on eclipse prediction, commented on the NASA Eclipse website. “Better to see a shorter eclipse from clear sky than a longer eclipse under clouds.”
A solar eclipse always occurs about two weeks before or after a lunar eclipse, when the Moon moves into Earth’s shadow. Lunar eclipses are visible from about half of Earth’s surface.
There will be a second solar eclipse in 2020 on December 14 over South America. Because the Moon will be a bit closer to Earth, it will block on the Sun’s light entirely.
It will take less than 100 minutes for the path of this eclipse to move across the continent.
Even if the day has darkened, looking at a solar eclipse with the naked eye is dangerous.
Sunglasses — which don’t filter out UV rays — do not offer any protection, Delefie warned.
“The Sun is so bright that even when there’s only a tiny portion visible, it is still dangerous for the eyes,” he said.
Rare ‘ring of fire’ solar eclipse to dim Africa, Asia
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Rare ‘ring of fire’ solar eclipse to dim Africa, Asia
- Annular solar eclipse soccur every year or two and can only been seen from a narrow pathway across the planet
- There will be a second solar eclipse in 2020 on December 14 over South America
Three-year heatwave bleached half the planet’s coral reefs: study
PARIS: A study published on Tuesday showed that more than half of the world’s coral reefs were bleached between 2014-2017 — a record-setting episode now being eclipsed by another series of devastating heatwaves.
The analysis concluded that 51 percent of the world’s reefs endured moderate or worse bleaching while 15 percent experienced significant mortality over the three-year period known as the “Third Global Bleaching Event.”
It was “by far the most severe and widespread coral bleaching event on record,” said Sean Connolly, one the study’s authors and a senior scientist at the Panama-based Smithsonian Tropical Research Institute.
“And yet, reefs are currently experiencing an even more severe Fourth Event, which started in early 2023,” Connolly said in a statement.
When the sea overheats, corals eject the microscopic algae that provides their distinct color and food source.
Unless ocean temperatures return to more tolerable levels, bleached corals are unable to recover and eventually die of starvation.
“Our findings demonstrate that the impacts of ocean warming on coral reefs are accelerating, with the near certainty that ongoing warming will cause large-scale, possibly irreversible, degradation of these essential ecosystems,” said the study in the journal Nature Communications.
An international team of scientists analyzed data from more than 15,000 in-water and aerial surveys of reefs around the world over the 2014-2017 period.
They combined the data with satellite-based heat stress measurements and used statistical models to estimate how much bleaching occurred around the world.
No time to recover
The two previous global bleaching events, in 1998 and 2010, had lasted one year.
“2014-17 was the first record of a global coral bleaching event lasting much beyond a single year,” the study said.
“Ocean warming is increasing the frequency, extent, and severity of tropical-coral bleaching and mortality.”
Australia’s Great Barrier Reef, for instance, saw peak heat stress increase each year between 2014 and 2017.
“We are seeing that reefs don’t have time to recover properly before the next bleaching event occurs,” said Scott Heron, professor of physics at James Cook University in Australia.
A major scientific report last year warned that the world’s tropical coral reefs have likely reached a “tipping point” — a shift that could trigger massive and often permanent changes in the natural world.
The global scientific consensus is that most coral reefs would perish at warming of 1.5C above preindustrial levels — the ambitious, long-term limit countries agreed to pursue under the 2015 Paris climate accord.
Global temperatures exceeded 1.5C on average between 2023-2025, the European Union’s climate monitoring service, Copernicus, said last month.
“We are only just beginning to analyze bleaching and mortality observations from the current bleaching event,” Connolly told AFP.
“However the overall level of heat stress was extraordinarily high, especially in 2023-2024, comparable to or higher than what was observed in 2014-2017, at least in some regions,” he said.
He said the Pacific coastline of Panama experienced “dramatically worse heat stress than they had ever experienced before, and we observed considerable coral mortality.”
