Connect with us

News

Climate change has already impacted about half of Indian Ocean basin

Published

on

File photo of people wading through flood water in a Colombo suburb

Half of world’s oceans already affected by climate change

The world’s oceans have turned into a veritable sponge for our emissions, and new climate models suggest we’ve soaked them right through, said a report published by the Science Alert news service yesterday.

Since the 1950s, our planet’s vast bodies of water have absorbed roughly 93 percent of the energy entering the climate system, and while most of that heating has been observed near the ocean surface, rising temperatures are now permeating even the deepest parts, ScienceAlert reported.

The report filed from Tehran said: Real-world data on the deep ocean is hard to come by, but a new estimate, based on recent measurements and nearly a dozen climate models, suggests climate change has already impacted up to about half (20 to 55 percent) of the Atlantic, Pacific, and Indian Ocean basins.

What’s more, in just six decades, these human-induced changes in temperature and salinity could very well spread to 80 percent of the world’s oceans.

“We were interested in whether the levels of temperatures and salt were great enough to overcome natural variability in these deeper areas,” explains climate scientist Yona Silvy from Sorbonne University in France. “That is, if they had risen or fallen higher than they ever would during the normal peaks and troughs.”

Using temperature and salinity measurements from the deep ocean and plugging these into 11 current climate models, the team simulated ocean and atmospheric circulation over the years, with and without the contribution of human emissions.

During the second half of the 20th century, Silvy and her colleagues found human-induced warming was responsible for most observed ocean changes – “statistically” and “unambiguously” different from what would occur naturally. Because heat and salt impact ocean density and circulation, this could have widespread implications.

“This affects global ocean circulation, sea level rise, and poses a threat to human societies and ecosystems,” says Silvy.

Most of the time, heat and salt from the surface of the ocean are transported relatively slowly to the ocean’s interior, which means that many of the deepest parts experience a lag in human-induced changes.

Some deeper areas, however, circulate quicker, and thus respond faster to our emissions.

In the new model, for instance, the Southern Ocean, which is relatively well-ventilated, experienced human-induced changes quite quickly, showing up as early as the 1980s.

Meanwhile, in the Northern Hemisphere, oceans took a little longer to respond, with most changes calculated to appear sometime between 2010 and 2040.

Together, by 2020, the model shows somewhere between 20 percent and 55 percent of the world’s oceans had been altered by anthropogenic climate change.

By mid-century, these changes could make up 50 to 60 percent of the world’s oceans, and by 2080, 55 to 80 percent.

“This work suggests that a large portion of the observed change patterns in the ocean interior is human-induced and will continue to intensify with continuing CO2 emissions,” the authors write.

Plus, even if emissions are slowed, the lag in ocean circulation means we are locked in to a certain amount of change going forwards.

We still don’t fully understand the relationship between deeper changes to salt and heat and surface warming, or how these changes impact ocean circulation. It requires far more investigation, especially in the Southern Hemisphere where deep ocean data is few and far between, but investigate it we must.



Continue Reading
Advertisement
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

News

Athapaththu and Dilhari muscle Sri Lanka past Malaysia in mismatch

Published

on

By

Kavisha Dilhari scored a quick unbeaten 44 and then picked up two wickets [Asian Cricket Council]

The quarter-finals of the Asian Games women’s competition, putting top-notch teams against teams without much experience of playing at the highest level, were expected to be mismatches. It took till the third game – Bangladesh vs China was washed out and Thailand gave Pakistan a fright for a proper one-side affair, though, as Sri Lanka bashed 160 after opting to bat, and their bowlers then stopped Malaysia 86 runs short.

Fresh off their appearance in the final of the Women’s T20 Asia Cup, Sri Lanka were always expected to dominate, but it didn’t quite start the way they wanted, with Imesha Dulani run out for another low score in the third over – she hasn’t topped 25 in eight innings since her century against Pakistan on July 31.

Chamari Athapaththu,  however, stitched together an 80-run stand off just 53 balls with Hasini Perera for the second wicket, scoring 56 runs in 27 balls to Perera’s 23 in 26 in the collaboration. After the two batters fell, Kavisha Dilhari played a similar role to Athapaththu in the stand with Harshitha Samarawickrama, scoring 36 in 19 in a stand worth 62 in 37 balls.

Athapaththu top-scored with 63 in 37 balls, while Dilhari’s unbeaten 44 came off just 27 balls. For Malaysia, offspinner Nurin Imanina impressed with 3 for 29 from her four overs, picking up all the wickets to fall to bowlers.

In reply, Malaysia were three down inside the powerplay, with Dilhari picking up two of the wickets to fall on her way to returns of 2 for 4 from three overs. Athapaththu chipped in with two wickets of her own to finish with 2 for 3 from two overs, while Mithali Ayodhya got 2 for 15 from three.

It’s not like there was no resistance from Malaysia: Winifred Duraisingam scored 28, though it took her 47 balls to do it, while Mahirah Izzati Ismail scored 24, another slow effort, taking her 42 balls.

Scores:
Sri Lanka Women  160 for 4 in 20 overs  (Athapaththu 63, HasinMithali Ayodhya 2-15i Perera 23, Kavisha  Dilhari 44*, Harshitha Samarawickrema 25; Nurin Imanina 3-29) beat Malaysia Women 74 for 7 in 20 overs (Winifred Duraisingam 28, Mahirah Izzati Ismail 24; Mithali Ayodhya 2-15, Kavisha Dilhari 2-04, Chamari Athapaththu 2-03, ) by 86 runs

[Cricinfo]

Continue Reading

News

Bid for Basil’s extradition nears final stage: Police

Published

on

Basil Rajapaksa

Govt. is finalising extradition proceedings against Basil to have him stand trial here in respect of several cases

By Norman Palihawadane

The process of having former Minister Basil Rajapaksa extradited from the US to Sri Lanka was being finalised, Police Headquarters sources disclosed yesterday.

The government has formally sought assistance from the United States government to extradite former Minister Basil Rajapaksa, as multiple courts have reissued arrest warrants over his failure to appear before them in connection with two separate criminal cases, a senior police officer told The Island.

The officer, speaking on condition of anonymity, said matters pertaining to obtaining US government authorities’ assistance to extradite Rajapaksa were now being finalised.

Police headquarters sources said law enforcement agencies were currently evaluating red notices, which request the location and provisional arrest of a person pending formal extradition.

The CID and Police Headquarters earlier initiated steps to seek INTERPOL assistance to secure Rajapaksa’s return to Sri Lanka to face court proceedings relating to the two cases in which arrest warrants have been issued against him.

Rajapaksa is believed to be residing in Los Angeles, United States.

The Matara Chief Magistrate’s Court on July 21, 2026, reissued an arrest warrant for Rajapaksa after he failed to appear before court for the second time in connection with a case involving the alleged purchase of a 1.5-acre coconut estate on Eliyakanda Road in the Brown’s Hill area of Matara.

The case relates to the purchase of the property for Rs. 60 million.

The case was filed by the Police Financial Crimes Investigation Division and names Basil Rajapaksa and several other accused, including Ayoma Galappaththi, identified in court reports as the sister of Rajapaksa’s wife, Tissa Galappaththi, and Muditha Jayakody.

However, officials acknowledged that seeking US assistance would only begin a formal international process and would not automatically result in Rajapaksa’s arrest or return to Sri Lanka. Sri Lankan authorities would need to submit court orders, details of the alleged offences, and other supporting documents through the appropriate diplomatic and judicial channels. Any request would then be considered by the relevant US authorities under American law and applicable legal arrangements.

Sources at the Foreign Ministry said sealed correspondence had been exchanged between Sri Lanka’s Ministry of Foreign Affairs and the Legal Department of the US State Department relating to corruption allegations against members of the Rajapaksa family residing in the United States.

The legal foundation for any extradition is the bilateral treaty between Sri Lanka and the United States signed in Washington on September 30, 1999. The treaty applies the principle of dual criminality, meaning authorities must show that the underlying conduct amounts to a crime in both countries. Rajapaksa’s status as a United States citizen would not, on its own, make him immune from a valid request under the treaty’s provisions.

Continue Reading

News

High blood pressure, diabetes lead to about 80% of deaths in Sri Lanka

Published

on

Non-communicable diseases (NCDs) account for 80% of all deaths in Sri Lanka, with high blood pressure and diabetes among the leading causes, Secretary to the Ministry of Health and Mass Media, Dr. Anil Jasinghe, said early this week.

Dr. Jasinghe pointed out that the two conditions were interrelated and could lead to a range of serious health complications, with heart attacks being among the most severe consequences.

Dr. Jasinghe made these remarks while attending the commencement of construction of a modern Cardiac Care Complex at the Anuradhapura Teaching Hospital on Wednesday (16).

The Health and Mass Media Ministry Secretary said:

“The main issue is that these two diseases are interconnected and cause a range of complications in a person’s health. Looking at the current situation in Sri Lanka, only around 50% of those suffering from high blood pressure are under effective control. Similarly, only around 25% of diabetic patients are under proper control. As a result, this has now become a major problem in society.

“The most serious complication associated with both these diseases is Myocardial Infarction (MI), or a heart attack. This has also become the

leading complication. So, how do we control this modern epidemic? This is the biggest challenge before us.

“While establishing modern facilities across the country, our health system must also recognize the changes that have taken place in the demographic structure of our population and disease patterns. Accordingly, our health system must be adapted to suit these changing circumstances.

“Under the policies of the government led by the President and the guidance of the Minister of Health, the Ministry of Health and Mass Media is currently implementing a major programme in this regard. Its three main components are Arogya, Cluster Systems and High-End Care Institutions, which need to be developed to suit the requirements of our health system.”

Continue Reading

Trending