Zitat:Hunger stones, wrecks and bones: Europe’s drought brings past to surface

The warning could not be starker. Wenn du mich siehst, dann weine (“If you see me, then weep”), reads the grim inscription on a rock in the Elbe River near the northern Czech town of Děčín, close to the German border.

As Europe’s rivers run dry in a devastating drought that scientists say could prove the worst in 500 years, their receding waters are revealing long-hidden artefacts, from Roman camps to ghost villages and second world war shipwrecks. [...] Czech researchers in 2013 described the stone as “chiselled with the years of hardship and the initials of authors lost to history”, saying it “expressed that drought had brought a bad harvest, lack of food, high prices and hunger for poor people.”

The earliest readable year on the Děčín stone is 1616. Traces of inscriptions relating to much earlier droughts, including 1417 and 1473, have been largely eroded over time. Ten later dry years, between 1707 and 1893, are also recorded. Stern reminders of drought’s grim consequences, most hunger stones are found on the Elbe, which flows from the north of what is now the Czech Republic through former Bohemia and then Germany before reaching the North Sea near Hamburg. Others appear on the Rhine, Danube and Moselle. [...]

Italy’s longest river, the parched Po, whose water level is at a 70-year low, has yielded the remains of an ancient hamlet in Piedmont. More recent relics to emerge from the river include the wreck of the Zibello, a 50-metre cargo barge sunk during the second world war, a Nazi military vehicle and, near Mantua, a 450kg (1,000lb) bomb, whose discovery and detonation required the evacuation of more than 3,000 people from their homes. [...]

In Rome, the receding Tiber has revealed the ruins of a bridge believed to have been built during the first century for the emperor Nero so he could more easily visit his possessions on the right bank of the river, including the villa of his mother, Agrippina. In Serbia, the mighty Danube has fallen to its lowest level in almost a century, exposing the wrecks of more than 20 explosives-filled German warships scuttled during the second world war near Prahovo, some still with turrets and bridges intact, others mostly hidden under sand banks. [...]

The evaporating As Conchas reservoir has also exposed Aquis Querquennis, a Roman fort built between AD69 and 79 but abandoned in about AD120. The site vanished beneath the water in 1949 but its full 2.4 hectares (5.9 acres) are now revealed.

Also in Galicia, the falling waters of the Belesar reservoir, built in 1963 and currently at 39% capacity, have exposed the submerged village of old Portomarín, allowing visitors to stroll around its houses. In Estremadura, a 15th-century bridge below the surface of the Cijara reservoir has emerged, as has the whole of the 11th-century Sant Romà de Sau church in Catalonia.

A long way farther north, the remains of Berich, an entire submerged village near Waldeck in Germany that has been 12 metres underwater since 1913 and is usually referred to by divers as Edersee-Atlantis, can now be visited on foot.

(05.09.2022, 08:28)Schneemann schrieb: Nicht nur der langsam austrocknende Lake Mead, eigentlich ein Stausee des Colorado-Systems, in den USA bringt derzeit einen kuriosen Fund nach dem anderen hervor, darunter auch vermutlich jahrzehntealte Mordopfer, sondern die aktuelle Dürre lässt auch in Europa den einen oder anderen Fund aus den Fluten wieder auftauchen...
https://www.theguardian.com/world/2022/aug/19/hunger-stones-wrecks-and-bones-europe-drought-brings-past-to-surface

Schneemann

Zitat:Das beweist doch eigentlich nur dass es Extremwetterlagen schon immer gab und dies eben nicht explizit etwas mit der Industriegesellschaft zu tun hat.

Zitat:These glaciers are on track to disappear within the next 30 years, new report shows

CNN - The climate crisis is touching nearly every region of the world. But perhaps one of the most visible indicators of its impact is its effect on Earth’s iconic glaciers, a major source of freshwater supply. Glaciers have been melting at a breakneck pace in recent decades, leading to around 20% of global sea level rise since 2000.

Now researchers at the UN Educational, Scientific and Cultural Organization have found that glaciers in one-third of the planet’s most beautiful parks and protected areas are set to disappear by 2050 – whether or not global warming is slowed. Among the glaciers on the brink of vanishing at World Heritage sites are those in two of the most visited and most beloved parks in the United States – Yellowstone National Park, which saw unprecedented flooding earlier this year, and Yosemite National Park.

The list also includes some of the largest and most iconic glaciers in Central Asia and Europe as well as the last remaining glaciers in Africa, namely Mount Kenya and Mount Kilimanjaro. [...] Only by limiting global warming to 1.5 degrees Celsius above preindustrial levels can we save glaciers at the other two-thirds of these parks, scientists report – a climate target that recent reports say the world is far from achieving. The global average temperature has already risen around 1.2 degrees since the industrial revolution.

Glaciers cover around 10% of land, providing fresh water supply for households, agriculture and industry downstream. Under normal conditions, they take as long as a millennium to fully form; each year, they gain mass through snow or rain, and lose mass by melting in the summer.

(09.09.2024, 18:20)lime schrieb: Na sowas aber auch, der angeblichen Verlangsamung des Golfstromes liegt also nur ein Messfehler zu Grunde, wie unerwartet

https://www.nature.com/articles/s41467-024-51879-5?fbclid=IwY2xjawFL_t9leHRuA2FlbQIxMAABHS1ET2iwlNRgvDShsK0lGQSTxNUB12jFxZm-Xm3VSKXmqfpp9dtGxYhuBQ_aem_j6hWu2mnqEs-NMz6wfhswA

(09.09.2024, 18:20)lime schrieb: Na sowas aber auch, der angeblichen Verlangsamung des Golfstromes liegt also nur ein Messfehler zu Grunde, wie unerwartet

https://www.nature.com/articles/s41467-024-51879-5?fbclid=IwY2xjawFL_t9leHRuA2FlbQIxMAABHS1ET2iwlNRgvDShsK0lGQSTxNUB12jFxZm-Xm3VSKXmqfpp9dtGxYhuBQ_aem_j6hWu2mnqEs-NMz6wfhswA

Zitat:Die mögliche Schwächung der atlantischen meridionalen Umwälzzirkulation (Atlantic Meridional Overturning Circulation, AMOC) als Reaktion auf anthropogene Einflüsse, die von Klimamodellen angenommen wird, steht im Mittelpunkt der wissenschaftlichen Debatte. Eine Schlüsselkomponente der AMOC, der Floridastrom (FC), wird seit 1982 fast ununterbrochen mit Unterseekabeln zwischen Florida und den Bahamas bei 27°N gemessen. Eine Abnahme der FC-Stärke könnte ein Anzeichen für eine Abschwächung der AMOC sein. In dieser Studie werden die an einem Unterseekabel gemessenen bewegungsinduzierten Spannungen neu bewertet und der allgemeine Trend des abgeleiteten FC-Transports neu eingeschätzt. Wir stellen fest, dass die Kabelaufzeichnung ab dem Jahr 2000 eine Korrektur für die säkulare Veränderung des geomagnetischen Feldes erfordert. Diese Korrektur beseitigt einen falschen Trend in der Aufzeichnung und offenbart, dass die FC bemerkenswert stabil geblieben ist. Die neu berechneten AMOC-Schätzungen bei ~26,5°N ergeben einen deutlich schwächeren negativen Trend als der, der in den AMOC-Zeitreihen zu erkennen ist, die mit den unkorrigierten FC-Transporten erhalten wurden.

(10.09.2024, 15:50)Helios schrieb: Für die an den Modellen arbeitenden Wissenschaftler ist das hochrelevant, in der populären Gesamtbetrachtung ist wohl eher mal wieder der Umstand interessant, dass von bestimmten Gruppen und Personen wissenschaftliche Ergebnisse kontinuierlich geschmäht werden, es sei denn, sie scheinen die eigene kontrafaktische Ansicht zu bestätigen.

Davon abgesehen geht es hier um die sicherheitspolitischen Folgen des Klimawandels, und nicht um eine allgemeine oder spezielle Diskussion darüber. Nicht dass das hier wieder ausartet.

(10.09.2024, 15:27)Force_B schrieb: Abstract:



Noch nicht so wie befürchtet, aber längst nicht mehr so wie wünschenswert.

Zitat:Entire Earth vibrated for nine days after climate-triggered mega-tsunami

Landslide in Greenland caused unprecedented seismic event that shows impact of global heating, say scientists. [...]

A landslide and mega-tsunami in Greenland in September 2023, triggered by the climate crisis, caused the entire Earth to vibrate for nine days, a scientific investigation has found. [...] The collapse of a 1,200-metre-high mountain peak into the remote Dickson fjord happened on 16 September 2023 after the melting glacier below was no longer able to hold up the rock face. It triggered an initial wave 200 metres high and the subsequent sloshing of water back and forth in the twisty fjord sent seismic waves through the planet for more than a week. [...] A large number of huts were destroyed at a research station on Ella Island, 70km (45 miles) from the landslide. The site was founded by fur hunters and explorers two centuries ago and is used by scientists and the Danish military, but was empty at the time of the tsunami. [...]

Dr Stephen Hicks at University College London, one of the research team leaders, said: “When I first saw the seismic signal, I was completely baffled. Never before has such a long-lasting, globally travelling seismic wave, containing only a single frequency of oscillation, been recorded.” The signal looked completely different to multi-frequency rumbles and pings from earthquakes. It took 68 scientists from 40 institutions in 15 countries to solve the mystery by combining seismic data, field measurements, on-the-ground and satellite imagery, and high-resolution computer simulations of tsunami waves. [...]

Such events will become more common as global temperatures continue to rise. “Even more profoundly, for the first time, we can quite clearly see this event, triggered by climate change, caused a global vibration beneath all of our feet, everywhere around the world,” said Mangeney. “Those vibrations travelled from Greenland to Antarctica in less than an hour. So we’ve seen an impact from climate change impacting the entire world within just an hour.”