Monday, May 27, 2019

‘This is a wake-up call’: the villagers who could be Britain’s first climate refugees

Fairbourne in north Wales: ‘To watch it go under water would be heartbreaking’

From The Guardian by Tom Wall

As sea levels rise, Fairbourne, sandwiched between mountains and the beach, is being returned to the waves.
But where will its residents go?

It is an almost perfect spring day.
The sky is milky blue and there is barely a ripple on the mirror-flat expanse of Barmouth Bay.
The sunshine is warm and the mountains are beginning to turn from slate-grey to luscious green.
Bev Wilkins, a former businesswoman, launches a ball down the beach for her beloved German shepherd rescue dog, Lottie.
In a blur of legs and black fur, the dog dashes into the frothy surf.
“It is a lovely spot when the sun comes out,” she says, welcoming her dripping pet back with an affectionate rub.
“Horrible when it rains.”


Fairbourne (Wales) with the GeoGarage platform (UKHO map)


This is how Wilkins, 67, expected to spend her retirement when she sold her family home in Warwick and moved to Fairbourne, in north Wales, in 2002.
For many years it was blissful: she spent her summers swimming in the sea and drying off in the back garden.
Winters were harder, although she always had the views of Snowdonia’s rugged slopes to lift her spirits.
But if Wilkins lasts nearly as long as her mother, who is 98 and also lives in the village, she could be among the first residents to be moved out: Gwynedd council has decided it can no longer defend her home from rising sea levels driven by increasing global temperatures.
“This is a wake-up call for the country,” she says, making her way up the steep shingle bank to the wall that protects her white bungalow from the waves.
“This is going to happen elsewhere. Sometimes you have to see someone else go through it – we just happen to be the first.”

In 26 years – or sooner, if forecasts worsen or a storm breaches the sea defences – a taskforce led by Gwynedd council will begin to move the 850 residents of Fairbourne out of their homes.
The whole village – houses, shops, roads, sewers, gas pipes and electricity pylons – will then be dismantled, turning the site back into a tidal salt marsh.

It will become the first community in the UK to be decommissioned as a result of climate change; while other villages along England’s crumbling east coast have lost houses to accelerating erosion, none have been abandoned.
It may also create hundreds of British climate refugees: the residents of Fairbourne are not expected to receive any compensation for the loss of their homes, and resettlement plans are unclear.

 House behind the sea wall: a breach could sweep them away and drown villagers

It will not be the last village to meet this fate.
Sea levels around the UK have risen by 15.4cm since 1900, and the Met Office expects them to rise by as much as 1.12m from modern levels by 2100, putting at risk communities in coastal floodplains and on sea cliffs, which are found around much of the east and south coast of England.
The west of Wales and north-west England are also vulnerable.
Even if the world’s governments succeed in reversing increasing emissions in line with their Paris climate commitments, sea levels are set to rise for centuries, as the impact of higher global temperature and warmer oceans takes effect.

Fairbourne rises, somewhat improbably, from reedy mudflats that slide into the Irish Sea.
A straggle of white bungalows, holiday cottages and Victorian apartments, the village spreads out between the brackish waters of the Mawddach estuary mouth and the pale uplands of the Snowdonia national park.
On a bright day, with birdsong carrying on the warm breeze, it is easy to understand why the Victorian flour merchant Arthur McDougall chose this spot to build his ideal seaside resort in the late 1890s.

Since then, it has developed sporadically into a thriving and joyously eccentric English-speaking village of about 410 homes, with a shop, deli, chippy, butchers, campsite and a popular model railway.
Many retired couples moved here from industrial towns and cities in the Midlands, inspired by vivid memories of childhood holidays in north Wales.
Others were attracted by the spectacular landscape and the uncrowded beaches – along with relatively affordable house prices.

 Around 850 people live in Fairbourne, but no money will be spent on defending it after 2054
(Image: Keith Morris)

Gwynedd council decided it could not afford to defend the village indefinitely in 2013.
But the first time most local people heard about the new shoreline management plan was the following year, when BBC Wales’s investigative television series, Week In Week Out, highlighted parts of it in the wake of ferocious storms.
The village, which is barely above sea level, is protected by a sea wall, earth banks and a network of drainage channels.
These defences were recently improved as part of a £6.8m scheme to extend the life of the village; but from the middle of the century, increasingly regular flooding could render Fairbourne unhabitable.
A breach of the wall during a storm surge could sweep away houses and drown villagers.

As word of the council’s decision spread, house sales fell through and prices collapsed.
Some residents simply stopped maintaining their homes and gardens.
Others formed a campaign group, claiming that the reporting of the plan was misleading, and that the village had been unfairly singled out by Gwynedd.
They argued that flooding was much worse in Aberystwyth, Barmouth and Borth in 2014.

The campaign petered out when key members moved away, but much of the bitterness remains.
Wilkins, one of the original campaigners, feels the village has been badly treated.
“There are hundreds of residents in Fairbourne,” she says, as we talk in her living room.
“We’ve got the little railway. We’ve got the shops. We’ve got a post office. We are a thriving community, and that’s all going to be wiped out.I don’t like to think about it.”

Fairbourne is a village on the coast of Barmouth Bay in Arthog community, to the south of the estuary of the River Mawddach in Gwynedd, surrounded by the Snowdonia National Park.
Before the seaside resort was built the coastal area was known as Morfa Henddol, while the outcrop now occupied by the Fairbourne Hotel was called Ynysfaig.
Fairbourne was founded as a seaside resort by Arthur McDougall (of flour making fame.)
It is in an area listed by Gwynedd council for managed retreat due to rising sea levels.

Houses have started to sell again, but only to cash buyers looking for bargains; some calculate they can make a profit from rental income in the time Fairbourne has left.
However, many of the villagers cannot drop their asking prices £40,000 or £50,000 below the already depressed market rate for the area, because they could not afford to buy anywhere else.

Halfway along a quiet, sun-dappled cul-de-sac, Cathy Bowen, 83, and George Bowen, 76, are struggling to sell their two-bedroom bungalow for £125,000.
The couple moved to the village from Staffordshire 18 years ago after falling in love with the area on family caravan holidays.
But they want to sell because George, a cancer survivor who has type 2 diabetes, needs to be near a hospital.
“We want to move because George is not very well and I’m 83,” says Cathy, perched on a stool in their cosy lounge.
“I won’t be able to look after him for long.” There has been no interest so far.
“It’s been on for three months and not a soul has been here to see it,” she says, glumly.

For Mike Thrussell, 64, a well-known angling journalist, this is the untold story of Fairbourne.
Thrussell lives in one of the older, McDougall-era properties just below the sea wall, and claims the council has abandoned the villagers without any solutions.
“There are a lot of people in my position. I’ve been here 38 years. My house is paid for. I’m two and half years away from retirement,” he says.
“And then this comes along.”



Thrussell, who used to co-present BBC Five Live’s Fish on Five, says houses in Fairbourne have lost a good 40% of their value – and are bound to drop further as the decommissioning date approaches.
“People who want to sell are taking very cheap cash deals. I can’t do that. Where am I going to go? I wouldn’t get enough money to get another house,” he says, slamming his kitchen table in frustration.
Many villagers, he explains, had been planning to use their homes to pay for their care.
“How the authorities can sit there and push this forward with no solutions beggars belief,” he says.

Elsewhere in the village there is a mixture of sadness, denial and confusion about the long-term threat.
Standing at the bow of his boat, Barmouth’s former harbourmaster, Julian Kirkham, is adamant that he will not leave his home and says even scientists can’t agree on sea-level rises.
“It is just panic,” he says.
“There has been so much waffle that nobody knows what will happen.”

Younger residents will almost certainly experience the decommissioning of the village – although many question the likelihood of flooding.
Julia Walker, 32, who is buying groceries in the local shop, tells me she cannot move out.
“Our house is nice, but the thought that you might be in negative equity isn’t great when you have a young family starting out.”
She has three children, and is pregnant with a fourth.
The villagers feel powerless, she says.
“We don’t have options. We are just pawns.”

Shane Healy, 27, is leaning on a post outside the shop.
His mother moved to the village from Sutton Coldfield in the Midlands shortly before he was born.
“It will be a shame to lose everything. It has been built up from scratch and to watch it go under water would be heartbreaking for a lot of people,” he says.

Benjamin Winfer, 18, is walking his two dogs along the beach.
He works in a nearby chocolate factory.
He would like to buy, but banks refuse to lend in Fairbourne.
“I love it here,” he says, over the crackle of the tide dragging the shingle back and forth.
“I want to live here for the rest of my life, but I can’t get a mortgage.”

Despite the uncertain future, some people are moving into Fairbourne.
One of the new arrivals is Angie Brown, a retired tax officer.
She parks outside the shop and dashes in to pick up some beer for an impromptu barbecue.
“This is la-la land – flooding is not going to happen,” she says.
“Yes, the prices will continue to drop, but we will get the pleasure of living here in the meantime.”

Next day, the weather turns.
The sea is wild and frothy.
A bitter wind blasts the village and hailstones the size of boiled sweets pound the beach.
The engineer responsible for maintaining Fairbourne’s flood defences, Gareth Evens, is sensibly waiting in his Natural Resources Wales van.
He knows better than anyone the multiple risks the village faces.
“At high tide you can see how vulnerable Fairbourne is,” he says.
“There are not many places where the houses are almost lower than the level of sea. If the sea defence fails then people are at risk straightaway. It would be catastrophic.”

Evens says that, while other areas along the coast might appear to have a worse history of flooding, rising sea levels make it hard to defend Fairbourne in the long run.
“It is a low-lying area.
It is kept dry by sea defences, tidal defences and a network of ditches,” he says.
The tide is predicted to reach ever higher up the beach as the century progresses.
This makes it more likely that waves could come over the top or break the concrete sea wall, which sits on a single bank that is steadily being swept away.
“If the defence is breached, there would be an immediate torrent of water.
We are talking about loss of life, because the houses are built just behind,” Evens says.

The people of Fairbourne on the coast of West Wales have just found out they are one of fifty coastal communities earmarked what is known as managed retreat - basically the acceptance that the cost of maintaining sea defences cant be justified.
It makes economic sense - but is that good enough?

The threat doesn’t just come from the sea.
Rainwater pours off the mountains and water surges up and down the estuary.
Higher tides mean the water cannot always drain away through tidal flaps and backs up in the village.
“You have almost got a basin in Fairbourne.
All the runoff water naturally wants to come here,” he says.
Would Evens buy a house here? “Knowing what I know, I probably would not,” he says.

As hail drums on roofs and wind rakes the beach, the council officer tasked with the decommissioning, Lisa Goodier, arrives in her car.
She has grown to know the area well since she was appointed to work with the community in 2014, and is greeted warmly by a few brave dog walkers.
“It is sad to think this will all be gone,” she remarks after taking cover in a seafront cafe.
“But I hope it will be a big moment in this country for taking climate change seriously.”

Goodier has been drawing up a masterplan covering the timetable for decommissioning the village.
“Based on the current rates of sea-level rise, we are planning to start in 2045,” she says.
This will involve removing all trace of human existence.
“It means we would eventually return this land to the sea,” Goodier says.
“We would have to move everybody out, and then every ounce of infrastructure to return it to a salt marsh over time.”

However, the plan is on “a piece of elastic”: the process may have to be brought forward immediately if the sea wall is breached and inundated.
“If we have an early breach in the next two years then we need to be able to condense that very quickly,” she says, cradling a cup of takeaway tea.
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Goodier says the villagers are “unlikely” to get any compensation but will receive help to resettle.
“The idea is to work with the community to gradually move them out and provide solutions that we can all live with.
They will not be great solutions, given where we are financially,” she says.
Gwynedd council has been cutting spending for more than a decade and is facing a shortfall of £13m in 2019/20.

Goodier is aware that the stakes are high for residents who may end up with no assets.
“What we don’t want to do is create a bunch of climate refugees, because Fairbourne is at risk of that,” she warns.
There are no plans to rebuild the village elsewhere, not least because there is no land available in the Snowdonia national park.
Instead, residents are likely to be placed in existing towns and villages in north Wales.
Goodier admits that this will be challenging: “Are those places capable of absorbing that number of people?”
Added to this is the risk that Welsh-speaking communities may not accept them.
“Do people want to go there, and do people want to receive people from Fairbourne? Fairbourne is unusual because it is an English-speaking community in the most Welsh county in the whole of Wales,” Goodier says.

This is uncharted territory for local authorities.
There has never been a similar decommissioning project in the UK, and there is no fund to manage the impact of climate change, Goodier says.
She has searched in vain for international precedents, but found only a flood-prone Alaskan village that was voluntarily relocated in 2016.

The Welsh minister responsible for flooding, Lesley Griffiths, is sympathetic to the villagers’ plight but says the government is under no legal obligation to provide compensation.
“I know that sounds hard, but we don’t want to raise expectations that financial support could be available,” she says.
Griffiths admits that rising sea levels could mean that other Welsh communities are given up to the sea.
“There may come a time when it is not sustainable or safe to try to continue to defend low-lying areas, if our seas rise as predicted,” she says.

Talk of decommissioning angers the Arthog community council, the equivalent of an English parish council.
Stuart Eves, the council’s vice-chair, lives in a rambling stone farmhouse on the outskirts of Fairbourne.
He arrived from Buckinghamshire 40 years ago and runs the 30-pitch caravan park, which fills up every weekend throughout the summer.
“Goodier is wrong to say she is going to decommission the village.
You decommission a factory or something like that.
We are not a factory – the village is full of humans who have spent their life’s money to come and live here because it is such a beautiful place,” he says in his living room, which is infused with the rich tang of wood smoke.

The community council is opposed to Gwynedd’s plans for Fairbourne.
“We are going to object strongly to this masterplan. There are no hard facts,” he says, leaning forward in his chair.
“Nobody can really say if the sea level is going to increase or decrease.”

Other communities are likely to face similar battles in the coming decades.
While cities and areas with important industries are likely to be defended, smaller coastal communities are most at risk.
Norfolk villages such as Happisburgh, which has lost 35 homes to the sea, and Hemsby, which has lost 18 homes, are on the frontline of accelerating coastal erosion.
But these are not facing decommissioning because only the outskirts are threatened at present; in a few cases, demolished homes have been relocated further inland.
There’s no such option in Fairbourne, caught between the sea and the mountains.

A report for the government Committee on Climate Change (CCC) last year found nearly 530,000 properties at risk along the English coast.
By the 2080s, up to 1.5m homes will be at risk of flooding, with more than 100,000 homes at risk from coastal erosion.
In Wales, 104,000 properties are at risk of coastal flooding.
The lead author of the CCC report, Jim Hall, says existing plans to protect the coast are unfunded and unrealistic, and that the public are being kept in the dark about the real risks.
“The situation on the coast is a timebomb,” he says down the line from Oxford University, where he is professor of climate and environmental risk.
“About half the coast of England is protected with sea walls, promenades and other coastal defences.
But many of these are reaching the end of their lives.
It is just not going to be affordable to continue to protect large stretches of coastline.”

Hall argues that the chancellor will have to foot the bill to defend densely populated areas with important industries; he says the CCC’s analysis shows councils are claiming wrongly that they can afford to protect at least 185km of England’s coastline.
“Some coastal communities are being told by councils that they can hold the line for part or all of the century,” he says.
“But funding for these locations is unlikely.”

Hall would like local authorities to lead difficult conversations in these threatened communities, which could include the relocation of existing homes and limiting the approval of new properties.
“We need to start making hard choices now,” he says.
“This needs to be an inclusive process with some accompanying funding because communities need to be supported if they are going to adapt.” Instead of making impossible promises to build bigger defences, authorities should allow a new coastline to form, to protect communities further inland.
“Coastlines are naturally resilient.
They roll backwards.
Beaches, wetlands, mudflats provide a natural buffer against storms and waves,” Hall says.

The Environment Agency’s new flood and coastal erosion strategy for England, published earlier this month, admits its engineers cannot win a war against water and accepts some coastal communities will have to be moved.
But it doesn’t propose any funding streams.

While rising sea levels will be far more devastating for the millions living in low-lying regions in the developing world, British coastal communities still need help to adapt.
“Poor, densely populated, coastal mega-cities like Lagos [in Nigeria] are less able to invest in defences and cope with flooding,” Hall says.
“But climate change will create many victims in the UK, too – and we do not have those excuses.”

The residents of Fairbourne never expected to be test cases for the capacity of climate change to tear a community apart, but in 26 years’ time they will witness the end of a village that has existed for more than a century.
Mike Thrussell, the angling writer, takes a walk along the top of the darkening sea wall.
The wind is searing, turning his skin red.
He scans the line of homes below and searches for the right way to encapsulate the mood of the village.
“It gives you an inner feeling of doom.
It is despondency.
Everything you do is futile,” he eventually says.
“I cannot pass my home on to my son – it is lost.
What have I worked for?”

But Thrussell knows their pain will soon be felt by others on Britain’s rapidly changing coastline.
“It is not just a Fairbourne problem.
You’ve got all these other communities in Wales and England – where the hell are they going to go?”

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Sunday, May 26, 2019

How sea cucumbers can help the ocean

Sea cucumbers are a prized aphrodisiac in China.
But like many coastal species they have been chronically overfished.
One remote community in Madagascar has started a pioneering coastal-farming project with astonishing results.
 The ocean is facing environmental catastrophe.
Overfishing is a ticking time bomb for both planet and people.
In one remote coastal village the locals appear to have found an unlikely solution.
A strange little sea creature that’s a popular aphrodisiac and just possibly a fisherman’s salvation.
In the first business of its kind in Madagascar, Dadiny has recently started farming these animals.
Sea cucumbers.
Sea cucumbers are under threat.
Growing them in designated and contained areas is helping to protect both this important species and other kinds of marine life here in the south-west of Madagascar.
Because of the part sea cucumbers play in cleaning up the seabed it’s believed that they help maintain stocks of other marine life.
In this region, not just sea cucumbers, but all kinds of marine life have suffered from chronic overfishing.
When marine conservationist Alasdair Harris first visited Madagascar in 2001 he was shocked to discover the extent of this devastation.
To reduce this overfishing the NGO that Alasdair runs helped train 700 local fishermen and women in small-scale sustainable sea-cucumber farming.
It’s meant many locals are no longer using the techniques that contributed to overfishing in this region. Alasdair’s research suggests fish stocks have doubled here since 2006.
But it is not marine conservation that has fundamentally persuaded the local population to buy in to aquaculture - It’s hard economics.
There’s a strong demand for sea cucumbers in Asia where they’re prized as an aphrodisiac.
Farmers here can now make up to $50 a month, about twice that of a regular fisherman.
While this is still substantially below the average global wage, it’s brought dramatic improvements in the local quality of life.
NGOs, including Alasdair’s, are now working on similar farming ventures in other coastal villages around Madagascar.
Localised efforts can only go so far in countering the vast damage to ecosystems across the ocean.
But in the face of an increasingly urgent crisis that could still be a very long way.


While ordinary vegetable cucumbers cost $3 per kilo, sea cucumbers can cost over $3,000 per kilo.
These animals are prized as a delicacy in Asia, and are used by pharmaceutical companies to treat diseases like cancer.
Unfortunately, over-harvesting now threatens many sea cucumber populations

The eating behavior of some sea cucumber is definitely stunning

Saturday, May 25, 2019

Ivan Aivazovsky, seascape painting


The gale on sea is over (1839)

Rough sea (1844)

 The Ninth Wave (1850)
 
Fishing boats in a harbor (1854)


 The Tempest (1857)

Tempest above Evpatoriya (1861)

Sea View (1867)
 
High Seas (1870)


 Rescue at sea (1872)
 
A night. Blue wave (1876)
 
View of seaside town (1877)


 Surf (1883)

The Wrath Of The Seas (1886)
 
Ship in stormy seas (1887)



Wave (1889)
 
Bracing the waves (1890)
 
Passage of the Jews through the Red Sea (1891)
 
From the calm to hurricane (1892)

 Storm at sea (1893)
 
 1893

 Travel of Poseidon by sea (1894)

 Sea (1895)
 
Sea (1898)
 
Waves (1898)
 

 Hurricane on a sea (1899)

 Ship in storm
 
Sailing ship
 

see Wikiart Ivan Aivazovsky


Throughout his lifetime, Ivan Constantinovich Aivazovsky contributed over 6,000 paintings to the art world, ranging from his early landscapes of the Crimean countryside to the seascapes and coastal scenes for which he is most famous.
Aivazovsky was especially effective at developing the play of light in his paintings, sometimes applying layers of color to create a transparent quality, a technique for which they are highly admired.
Although he produced many portraits and landscapes, over half of all of Aivazovsky’s paintings are realistic depictions of coastal scenes and seascapes.
He is most remembered for his beautifully melodramatic renditions of the seascapes of which he painted the most.
Many of his later works depict the painful heartbreak of soldiers at battle or lost at sea, with a soft celestial body taunting of hope from behind the clouds.
His artistic technique centers on his ability to render the realistic shimmer of the water against the light of the subject in the painting, be it the full moon, the sunrise, or battleships in flames.
Many of his paintings also illustrate his adeptness at filling the sky with light, be it the diffuse light of a full moon through fog, or the orange glow of the sun gleaming through the clouds.
In addition to being the most prolific of Russian Armenian painters, Aivazovsky founded an art school and gallery to engage and educate other artists of the day.
He also and built a historical museum in his hometown on Feodosia, Crimea, in addition to beginning the first archaeological expeditions of the same region. 

Friday, May 24, 2019

Plankton haven’t been the same since the industrial revolution



Planktonic foraminifera assemblage from Caribbean sediments that provide an accurate picture of the species community before human influence.
Each shell is less than one millimeter in size.
A clever study finds that communities of foraminifera, a hard-shelled kind of plankton, have transformed dramatically since the Industrial Revolution. 
(Michal Kucera)

From The Smithsonian by Maddie Burakoff

As scientists scramble to figure out how warming ocean temperatures will affect marine ecosystems across the globe—from bleaching coral reefs to altered migration routes—one of the sea’s most ubiquitous organisms is helping researchers measure the changes that have already occurred.
Centuries of fossil records and live-capture data show that some marine plankton populations reflect a clear change in response to human industrialization and the warming oceans that have come with it.

Researchers found distinct differences between communities of planktonic foraminifera—tiny single-celled creatures that float in ocean waters—from before and after the start of the industrial era about 170 years ago, according to a study published this week in Nature.
The ratio of plankton species in these communities shifted in proportion to changes in sea temperature, indicating that ocean warming has deeply altered these populations and their wider marine ecosystems.

Microscopic view on marine plankton.
Credit: A. Stuhr, GEOMAR.

While the idea that climate change affects marine life isn’t new, the plankton study incorporates an unusually complete data set that spans the globe and cuts deep into past centuries to reaffirm humanity’s impact on the oceans.

Planktonic foraminifera provide a comprehensive fossil record because their hard calcite shells are preserved well in sediment layers at the bottom of the ocean, says lead author Lukas Jonkers, a paleontological oceanographer at the University of Bremen in Germany.
The organisms also populate waters all across the world.
Though rare in the surface ocean, planktonic foraminifera are abundant at greater depths, and in some places they carpet entire swaths of the sea floor, Jonkers says.

 Recovery of a sediment trap on board the research vessel Meteor in the tropical North Atlantic Ocean. Such sediment traps provide information on modern planktonic foraminifera species communities, which were found to be systematically different from pre-industrial communities from sediments.
(Christiane Schmidt)

“We can really compare very well the distribution of the species in the modern [era] with the past,” Jonkers says.
“There's not so many zooplankton groups where the fossil records are so well preserved.
In fact, I don't think there's any.”

To understand the state of these communities before the industrial era kicked off, Jonkers and his team analyzed more than 3,700 previously collected samples from sediment layers on the bottom of the ocean.
Based on how fast sediment accumulates and mixes on the seafloor, scientists estimated that the top layer of sediment cores—basically “cylinders of mud” pulled up from the bottom of the ocean—would contain fossils that are couple of centuries old, Jonkers says, predating the industrial revolution.

The team then compared these pre-industrial samples with more recent data collected using sediment traps, which are funnels moored to the seafloor that grab anything falling down from the ocean’s upper layers (including the plankton that drift through the water).
Using information collected from 1978 to 2013, researchers discovered that planktonic foraminifera communities changed markedly during the time period between the deposit of the seafloor fossils and the organisms caught in sediment traps.

The shift, measured by comparing the relative abundances of dozens of plankton species within the samples, doesn’t appear to be random.
The amount of change in the plankton communities correlated with the degree of documented temperature change in the surrounding waters.
The direction of shifting communities also largely lined up with patterns of ocean temperature change, as authors found when they matched up seafloor fossils with their closest analogues in modern communities.

With the data showing a match in both the degree and the direction of change, Jonkers says he’s confident that temperature is the driving force for the shifts in planktonic foraminifera populations.
“I was expecting to see a difference and an effect of global change,” Jonkers says.
“But I hadn't expected that the signal would be so clear.”

 The distribution of modern-day (white dots) and ancient (grey dots) zooplankton data used in the study. Sea surface temperature change from 1870 to 2015 is also shown.
Source: Jonkers et al. (2019)
Illustration of phytoplankton species distribution across the global ocean.
Credit: Jorge Martinez-Rey and Meike Vogt, 2019/ Damiano Righetti, 2019

The new study replicates on a global scale what other researchers have found in specific areas, says David Field, a marine scientist at Hawaii Pacific University who has researched planktonic foraminifera but was not involved in this study.
While scientists have yet to fully unravel why exactly plankton communities are changing, the evidence from this study and others clearly points to ocean warming as the likely cause, either as a direct influence or as an indirect driver of other aspects of the underwater environment, Field says.

Comparing sediment-trap samples to seafloor fossils might not be a perfect analogy—differences in preservation could be a possible influence on the data—but Field says the authors’ evidence provides compelling support for the huge influence of ocean warming on marine species.
“This indicates that warming began to have an effect on marine ecosystems a long time ago, even before we were keeping good records on it,” Field says.
“We can expect much more impact of ocean warming on ecosystems in the future.
Oceans are going to continue to change in ways we haven’t seen before.”

Planktonic foraminifera may not be as majestic as whales or sea stars, but the breadth of their fossil record provides a useful baseline to confirm a wider trend of ocean life changing in response to human activity.
Shifts in plankton communities are a concerning indicator of the “bigger picture” for marine ecosystems as ocean temperatures continue to rise at increasing rates, Jonkers says.“The question is, what will happen with climate change progressing?” Jonkers says.
“Even at one degree [of temperature change], we already see large changes in planktonic foraminifera, and probably also in other marine biota.
That means that all these species have to adapt, and at the moment, we don't know if they can, or if they can do so fast enough.

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Thursday, May 23, 2019

Sunken Nazi U-boat discovered: why archaeologists like me should leave it on the seabed


Sea War Museum Jutland in Thyborøn has made a new sensational discovery during its continued registration of shipwrecks in the North Sea and Skagerrak.
In April 2018, the museum found the wreck of the German submarine U-3523, which was sunk with depth charges in Skagerrak by a British B24-Liberator aircraft on May 6, 1945.
Just the day before, the German forces in Denmark, Northwest Germany and Holland had surrendered, so the submarine was not engaged in battle, but was probably on its way to Norway.
The U-3523 was of the new and highly advanced type XXI that could have revolutionized the submarine war if enough boats had been completed in due time.
118 boats were in the process of being build, but only two came into active service, and none was ever engaged in battle.
U-3523 appeared on the survey screen during the museum's scan of the seabed some ten miles north of Skagen, and the discovery was very surprising.
Very unusually, the entire submarine bow is buried in the seabed while the stern is approximately 20 meters above the sea bottom.
The wreck lies at 123 metres of water depth, making it very difficult to access.

From The Conversation by Dr Innes McCartney

The collapsing Nazi government ordered all U-boats in German ports to make their way to their bases in Norway on May 2, 1945.
Two days later, the recently commissioned U-3523 joined the mission as one of the most advanced boats in the fleet.
But to reach their destination, the submarines had to pass through the bottleneck of the Skagerrak – the strait between Norway and Denmark – and the UK’s Royal Air Force was waiting for them.
Several U-boats were sunk and U-3523 was destroyed in an air attack by a Liberator bomber.

 geolocalisation with the GeoGarage platform (DGA nautical chart)
The submarine, called U-3523, was recently discovered by the Sea War Museum Jutland over 10 Nm north of Skagen (Denmark's northernmost town) and 9 Nm West of the position reported by originally, at a depth of 123m.

U-3523 lay undiscovered on the seabed for over 70 years until it was recently located by surveyors from the Sea War Museum in Denmark.
Studying the vessel will be of immense interest to professional and amateur historians alike, not least as a way of finally putting to rest the conspiracy theory that the boat was ferrying prominent Nazis to Argentina.
But sadly, recovering U-3523 is not a realistic proposition.
The main challenges with such wrecks lie in accurately identifying them, assessing their status as naval graves and protecting them for the future.

U-boat wrecks like these from the end of World War II are the hardest to match to historical records.
The otherwise meticulous record keeping of the Kriegsmarine (Nazi navy) became progressively sparser, breaking down completely in the last few weeks of the war.
But Allied records have helped determine that this newly discovered wreck is indeed U-3523.
The sea where this U-boat was located was heavily targeted by the RAF because it knew newly-built boats would flee to Norway this way.

Identification

The detailed sonar scans of the wreck site show that it is without doubt a Type XXI U-boat, of which U-3523 was the only one lost in the Skagerrak and unaccounted for.
These were new types of submarines that contained a number of innovations which had the potential to make them dangerous opponents.
This was primarily due to enlarged batteries, coupled to a snorkel, which meant they could stay permanently underwater.
Part of the RAF’s mission was to prevent any of these new vessels getting to sea to sink Allied ships, and it successfully prevented any Type XXI U-boats from doing so.

The Type XXI U-3008.

With the U-boat’s identity correctly established, we now know that it is the grave site of its crew of 58 German servicemen.
As such, the wreck should either be left in peace or, more implausibly, recovered and the men buried on land.
Germany lost over 800 submarines at sea during the two world wars and many have been found in recent years.
It is hopelessly impractical to recover them all, so leaving them where they are is the only real option.

Under international law all naval wrecks are termed “sovereign immune”, which means they will always be the property of the German state despite lying in Danish waters.
But Denmark has a duty to protect the wreck, especially if Germany asks it to do so.

Protection

Hundreds of wartime wreck sites such as U-3523 are under threat around the world from metal thieves and grave robbers.
The British cruiser HMS Exeter, which was sunk in the Java Sea on May 1, 1942, has been entirely removed from the seabed for scrap.
And wrecks from the 1916 Battle of Jutland that also lie partly in Danish waters have seen industrial levels of metal theft.
These examples serve as a warning that organised criminals will target shipwrecks of any age for the metals they contain.

Detailed sonar scans have been taken.
Sea War Museum

Germany and the UK are among a number of countries currently pioneering the use of satellite monitoring to detect suspicious activity on shipwrecks thought to be under threat.
This kind of monitoring could be a cost-effective way to save underwater cultural heritage from criminal activity and its use is likely to become widespread in the next few years.
Recovery

The recovery cost is only a small fraction of the funds needed to preserve and display an iron object that has been immersed in the sea for many years.
So bringing a wreck back to the surface should not be undertaken lightly.
In nearly all cases of salvaged U-boats, the results have been financially ruinous.
Lifting barges that can raise shipwrecks using large cranes cost tens of thousands of pounds a day to charter.
Once recovered, the costs of conservation and presentation mount astronomically as the boat will rapidly start to rust.

The U-boat U-534 was also sunk by the RAF in 1945, close to where U-3523 now lies.
Its crew all evacuated that boat, meaning that she was not a grave when recovered from the sea in 1993 by Danish businessman Karsten Ree, allegedly in the somewhat incredible belief that it carried Nazi treasure.
At a reported cost of £3m, the operation is thought to have been unprofitable.
The boat contained nothing special, just the usual mundane objects carried on a U-boat at war.

U-534 was salvaged in 1993 and since February 2009 has been on display in Birkenhead, England as part of the U-boat Story.
The U-boat is one of only four German World War II submarines in preserved condition remaining in the world.
A Royal Air Force bomber sank her on 5 May 1945 in the Kattegat 20 kilometres northeast of the Danish island of Anholt.

U-534 after the rescue.

Similar problems were experienced by the Royal Navy Submarine Museum in the UK when it raised the Holland 1 submarine in 1982.
In that case, the costs of long-term preservationproved much greater than anticipated after the initial rust-prevention treatment failed to stop the boat corroding.
It had to be placed in a sealed tank full of alkali sodium carbonate solution for four years until the corrosive chloride ions had been removed, and was then transferred to a purpose-built exhibition building to protect it further.

The expensive process of raising more sunken submarines will add little to our knowledge of life at sea during World War II.
But each time a U-boat is found, it places one more jigsaw piece in its correct place, giving us a clearer picture of the history of the U-boat wars.
This is the true purpose of archaeology.

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