Climate Change
Rising Antarctic ice melt will dramatically slow global ocean flows, study finds
Rapidly melting Antarctic ice is dramatically slowing down the flow of water through the world's oceans, and could have a disastrous impact on global climate, the marine food chain and even the stability of ice shelves, new research has found, Reuters reported.
The "overturning circulation" of the oceans, driven by the movement of denser water towards the sea floor, helps deliver heat, carbon, oxygen and vital nutrients around the globe.
But deep ocean water flows from the Antarctic could decline by 40% by 2050, according to a study published on Wednesday in the journal Nature.
"That's stunning to see that happen so quickly," said Alan Mix, a paleoclimatologist at Oregon State University and co-author on the latest Intergovernmental Panel on Climate Change assessments, who was not involved in the study. "It appears to be kicking into gear right now. That's headline news."
As temperatures rise, freshwater from Antarctica's melting ice enters the ocean, reducing the salinity and density of the surface water and diminishing that downward flow to the sea's bottom, read the report.
While past research has looked at what could happen to similar overturning circulation in the North Atlantic - the mechanism behind the doomsday scenario that would see Europe suffer from an Arctic blast as heat transport falters - less has been done on Antarctic bottom water circulation.
Scientists relied on around 35 million computing hours over two years to crank through a variety of models and simulations up to the middle of this century, finding deepwater circulation in the Antarctic could weaken at twice the rate of decline in the North Atlantic.
"They are massive volumes of water... and they are bits of the ocean that have been stable for a long time," said study co-author Matthew England, an oceanographer at the University of New South Wales, in a news briefing.
The effect of meltwater on global ocean circulation has not yet been included in the complex models used by the IPCC to describe future climate change scenarios, but it is going to be considerable, England said.
Ocean overturning allows nutrients to rise up from the bottom, with the Southern Ocean supporting about three-quarters of global phytoplankton production, the base of the food chain, said a second study co-author, Steve Rintoul.
"If we slow the sinking near Antarctica, we slow down the whole circulation and so we also reduce the amount of nutrients that get returned from the deep ocean back up to the surface," said Rintoul, a fellow at Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO).
The study's findings also suggest the ocean would not be able to absorb as much carbon dioxide as its upper layers become more stratified, leaving more CO2 in the atmosphere, Reuters reported.
The study showed that warm water intrusions in the western Antarctican ice shelf would increase, but it did not look at how this might create a feedback effect and generate even more melting.
"It doesn't include the disaster scenarios," said Mix. "In that sense, it's actually kind of conservative."
Climate Change
Kandahar’s Takhtapul district hit hard by ongoing drought
Afghanistan has experienced three consecutive years of drought, including the most devastating drought in 30 years in 2021 and 2022.
Residents of Takhtapul district of Afghanistan’s Kandahar province say they are struggling to survive amid an ongoing drought that has devastated their crops.
This rural community mainly relies on agriculture to survive but climate change has virtually ended any hopes of farming.
Afghanistan has experienced three consecutive years of drought, including the most devastating drought in 30 years in 2021 and 2022.
Climate experts predict that by 2050, 90% of its territory will be affected by drought.
Afghanistan is one of the ten countries most vulnerable to climate change. It's also ranked fourth in overall disaster risk.
Takhtapul residents have spoken out about their plight and said they have sustained extensive losses due to the drought
They said in the past they had made a living off farming, but now due to the severe lack of water, their land has become barren.
They also said this is forcing their youth and younger generation to find work in other provinces or outside the country.
Abdullah, a resident of Takhtapul district of Kandahar, said: "Our youths have gone to Pakistan and other provinces in search of work due to unemployment and drought. There they have wheelbarrows [for day labourer work] or they do other jobs."
On the other hand, local officials say that they are trying to reduce unemployment by launching development projects in this district.
Along with droughts and lack of work for young people, the breakdown of roads, lack of health centers and lack of suitable places for education are among the problems that the residents of this district want to solve.
Climate Change
EU pledges €15 million to WFP to help mitigate climate crisis impact on Afghans
The United Nations World Food Programme (WFP) has welcomed a €15 million (US$15.8 million) contribution from the European Union (EU) for its climate related activities in Afghanistan.
According to a statement issued by the EU on Thursday, this contribution will help local communities prepare for natural disasters and face the devastating effects of climate change, and support farmers for more productive and sustainable agriculture.
So far this year, more than 160,000 people have been affected by flooding in Afghanistan. Floods have destroyed almost 20,000 homes, and thousands of hectares of agricultural land.
“The European Union is committed to assisting the people of Afghanistan in adapting to climate change, which is severely threatening food security and livelihoods notably of rural communities, said the EU Chargée d’Affaires to in Afghanistan, Veronika Boskovic Pohar.
“Climate-related shocks also exacerbate host communities’ capacity to support internally displaced people and returnees from neighboring countries, and they discourage farmers in poppy-cultivating areas from sustainably shifting to licit crops.
“This latest contribution increases the European Union’s steady support to WFP’s resilience programme in Afghanistan to a total EUR 85.1 million since 2022”, she said.
Harald Mannhardt, WFP Deputy Country Director in Afghanistan, said: “This latest funding from the European Union comes at a critical moment as WFP earlier this year was forced to halt projects across the country due to a massive funding shortfall.”
Afghanistan is currently ranked seventh on the Notre Dame Global Adaptation Index of countries most vulnerable and least prepared to adapt to climate change.
Climate Change
Malaysia records six months of rain in just five days
One of the worst hit areas was Kelantan which recorded 1,442mm of rain between November 26 and 30
Six months worth of Malaysia’s average annual rainfall fell within five days across the east coast of the country last week, Prime Minister Datuk Seri Anwar Ibrahim said early Tuesday.
One of the worst hit areas was Kelantan which recorded 1,442mm of rain between November 26 and 30.
Ibrahim said the high rainfall led to flooding that forced a large number of people in Kelantan and Terengganu to be evacuated.
The recorded rainfall at Irrigation and Drainage Department stations in Tanah Merah and Tumpat, exceeded 1,167mm in just five days.
“According to the Malaysian Meteorological Department (MetMalaysia), the reading (in Kelantan) was at 1,442mm, an extraordinarily high level of rainfall. In Terengganu, MetMalaysia’s Besut station recorded 1,761mm of rain during the same period.
“Overall, the (average) rainfall was 1,349mm, far beyond our expectations,” Anwar told the Dewan Rakyat (Parliament) on Tuesday.
He also said the government is preparing for the forecast monsoon surge as announced by MetMalaysia, expected to start after Dec 8.
By Tuesday, some residents in the town of Tumpat were returning to submerged homes and shops as deadly floodwaters eased in some areas.
People who returned to their homes found many had collapsed, with parts of walls, roofs and broken furniture lying scattered in pools of water.
Muhamad Alim, a 56-year-old shopkeeper whose food store was inundated, recalled fast-rising waters in his home and his grandchildren crying as the flood surged on Saturday night.
"Electricity was cut off, and there was no water supply. So, we were stuck, sitting there as if we were in the middle of the sea, surrounded by water," he told Reuters.
"You could hear the sound of water rushing cutting through the silence of the night."
Six people have died in Malaysia and more than 150,000 were evacuated during the height of the floods last week, government data showed.
In Thailand, the death toll is 25, and more than 300,000 households were still affected, the interior ministry said.
The number of people in temporary shelters in Malaysia fell to just under 95,000 on Tuesday morning, though the authorities remain on guard for a second wave of floods this week.
Malaysia's Meteorological Department expects a wind convergence to begin on Tuesday, potentially bringing heavy showers, with a monsoon surge to follow on Dec. 8.
In Thailand, the Meteorological Department warned people in the south of the country to beware of heavy to very heavy rains and possible flash flooding and overflows from Dec. 3-5.
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