"A disturbing discovery" In the sea around Bermuda! "A disturbing discovery" In the sea around Bermuda!

"A disturbing discovery" In the sea around Bermuda!

"A disturbing discovery" In the sea around Bermuda!

Researchers have warned that the Sargasso Sea Around Bermuda, it is warmer, saltier and more acidic than it has been since measurements began in 1954, with an impact that could be far-reaching.

The researchers made the discovery while studying decades-old data from the Bermuda Atlantic Time Series (BATS) study, the world's longest record of oceanographic features that collects sea depth measurements in the Atlantic Ocean near Bermuda.

In a new study published in the journal Frontiers in Marine Science, researchers revealed that ocean temperatures rose by about 1 degree Celsius, with increased salinity and acidity. 

“The ocean heat content in the 2020s is unparalleled for the longest record we have since the 1950s,” said lead author Nicholas Bates, a chemical oceanographer at the Bermuda Oceanographic Institute at Arizona State University.

Bates noted that current temperatures will also likely break records that go back even further. “This is the warmest we have seen in millions of years,” he said. Researchers attributed the significant rise to climate change.

The survey also showed that the acidity of the Sargasso Sea It has increased by 30% to 40% over the past 40 years.

The rise in carbon dioxide in the atmosphere due to the burning of fossil fuels leads to the dissolution of carbon dioxide in the ocean. This can increase its acidity as the dissolved gas turns into carbonic acid, as well as carbonate and hydrogen ions.

The emission of greenhouse gases has also caused global ocean temperatures to rise. Oxygen dissolves less easily in warmer waters, leading to an approximately 7% decrease in oxygen in the Sargasso Sea.

Changes in air and ocean temperatures can also affect the rate of ocean water evaporation. Evaporation removes fresh water from the ocean, and rainfall returns it, which can affect salinity.

The team said these changes could negatively impact local marine life as well as Bermuda's coral reefs, which now face dramatically different ocean chemistry than they did in the 1980s.

The Sargasso Sea is A unique region in the North Atlantic Ocean, it not only constitutes a rich marine ecosystem, but also serves as a vital node in global ocean movement.



The results of a new study make one of the universe's biggest mysteries get even stranger

A team of scientists has revealed new insights into the cosmic mystery known as millisecond fast radio bursts (FRB).
Fast radio bursts are short, intense flashes of radio waves from deep space. While most of them occur only once, some of the "duplicate" It sends signals more than once, which increases the mystery of understanding its origin.

The first fast radio burst was discovered in 2007, and hundreds of such events have subsequently been detected coming from distant points across the universe. In a thousandth of a second, the jets can generate as much energy as our Sun produces in a year or more. But astronomers don't understand what causes it.

Now, scientists have noticed a strange, never-before-seen pattern in a newly observed repeating fast radio burst called FRB 20220912A.

A team from the Search for Extraterrestrial Intelligence (SETI) Institute observed the recurring radio bursts of FRB 20220912A with the SETI's Allen Telescope Array (ATA).

Over the course of 541 hours of observation, they detected 35 fast radio bursts from a single source, the duplicate FRB 20220912A.

The detailed results, recently published in the journal Monthly Notices of the Royal Astronomical Society, reveal the intriguing behaviors of fast radio bursts.

At first, FRB 20220912A looked like duplicate radio bursts. Other known signals, each detected explosion shifts from higher frequencies to lower frequencies.

But a closer look at the signal revealed something new: a noticeable drop in the center frequency of the explosions, revealing what sounds like a cosmic glide whistle when converted to sonication.

The decline became more pronounced when scientists converted the signals into sounds using musical notes on a xylophone. High notes correspond to the beginning of flows, while low notes act as a closing tone.

The team tried to determine whether there was a pattern within the timings between each burst, similar to some known fast, repetitive radio bursts. But the team was unable to find a clear pattern in FRB 20220912A, highlighting the unpredictability of these celestial phenomena.

“This work is exciting because it provides confirmation of known fast radio burst properties and the discovery of some new ones,” lead study author Dr. Sofia Shaikh, a National Science Foundation MPS-Ascend postdoctoral fellow at the Search for Extraterrestrial Intelligence (SETI) Institute, said in a statement. ;.

She continued: “It was wonderful to be part of the first study of fast bursts conducted using the Allen Telescope Array (ATA). This work proves that new telescopes with unique capabilities, such as the Allen Telescope Array, can provide a new angle on the outstanding secrets in science.” Fast radio bursts.

Each FRB observation brings insights as well as more questions, the scientists said.

Astronomers suspect that some fast radio bursts may originate from magnetars, the strongly magnetized cores of dead stars. But other research has indicated that collisions between dense neutron stars or dead stars called white dwarfs may be the cause.

Dr Sophia said: “We are narrowing down the source of fast radio bursts to extreme objects such as magnetars, but there is no existing model that can explain all the properties observed so far.”
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