A news release from the Scripps Institution of Oceanography at the University of California, San Diego, from the department of “It’s all about climate change.” What time is it:
1. Glaciers melt and collapse, triggering local tsunamis. This is what they do and have been doing for thousands of years. The same goes for rock slides. Nothing new here. No need for climate change.
2. Seismic waves produced by calving glaciers are nothing new. In fact, they occur “all the time” in Antarctica, according to the University of Leeds. At best, this was a novelty, as the signal lasted nine days.
3. “Megatsunamis” and seismic waves (sustained seismic waves) occur simply because the narrow fjord means the kinetic energy has nowhere to go. If it disintegrated into the open ocean, it would be just another normal blip on seismic radar and probably wouldn't be noticed at all.
4. Reading the press release, it is easy to see that the story has been embellished to make it more dramatic than scientific. Sheesh.
5. The IPCC stated that there is no connection at all between landslides and climate change. In their latest scientific assessment, they stated that they could not find any new signals linking climate change to landslides and that they do not expect any landslides to occur in the future. .
The following is Table 12.12 in Chapter 12 on page 90 of the United Nations IPCC Sixth Assessment Report. The emergence of climate impact drivers (CIDs) in different periods. Color corresponds to the confidence in areas with the highest confidence: white indicates where there is little evidence of a climate change signal or where no signal exists, resulting in an overall low confidence in emerging signals.
Check out the before (left) and after (right) photos provided in the press release below.
This doesn't affect anyone. This is just another doomsday headline from the ignorant media. The only thing true in the press release was that earthquake ringing signals were detected for nine consecutive days. The rest is pure speculation.
Wave produces peer-reviewed publication of earthquake signals lasting nine days
University of California, San Diego
In September 2023, scientists around the world detected mysterious earthquake signals for nine consecutive days. An international team of scientists, including seismologists Alice Gabriel and Carl Ebeling of the Scripps Institution of Oceanography at the University of California, San Diego, came together to solve the mystery.
A new study published today science A stunning solution was provided: In an East Greenland fjord, a mountaintop collapsed into the sea, triggering a massive tsunami about 200 meters (650 feet) high. The huge waves rocked back and forth in the narrow fjord for nine days, creating seismic waves that reverberated through the Earth's crust and baffled scientists around the world. This rhythmic swaying is a phenomenon known as ” squid. Fortunately, no one was injured, but the waves destroyed approximately $200,000 worth of infrastructure at an uninhabited research station on the island of Hela.
Kristian Svennevig, a geologist at the Geological Survey of Denmark and Greenland (GEUS) and lead author of the study, said: “When we started this scientific adventure, everyone was confused and no one knew. What caused this signal? “We only know that it is somehow related to landslides. We can only solve this mystery through a huge interdisciplinary and international effort.”
Climate change is causing glaciers at the foot of the mountain to melt, destabilizing more than 25 million cubic meters (33 million cubic yards) of rock and ice, enough to fill 10,000 Olympic-sized swimming pools, and eventually leading to landslides. Into the sea. As climate change continues to melt the Earth's polar regions, it could lead to an increase in massive, damaging landslides like this one.
“Climate change is changing typical conditions on Earth and it can trigger unusual events,” said Gabriel, whose work was supported by the European Research Council, Horizon Europe, the National Science Foundation (NSF) and the U.S. Supported by NASA.
When the seismic monitoring network first detected the signal in September 2023, it was puzzling for two main reasons. First, the signal looks nothing like the complex waveforms an earthquake produces on a seismograph. Instead, the interval between its peaks is 92 seconds, which is too slow for humans to detect. Second, the signal remains strong for several days, with the more common seismic events weakening more quickly.
The global geoscientist community began to heatedly discuss on the Internet what caused the strange seismic waves. Reports of a massive landslide in a remote Greenland fjord on September 16, the time the seismic signal was first detected, emerged during the discussion.
To figure out whether and how the two phenomena are related, a team led by Christian Svenneweg of the Geological Survey of Denmark and Greenland combined earthquake records from around the world, field measurements, satellite images and computer simulations , to reconstruct this extraordinary event.
The team, composed of 68 scientists from 41 research institutions, analyzed satellite and ground images documenting the massive amounts of rock and ice in the landslides that triggered the tsunami. They also analyzed seismic waves to simulate the dynamics and trajectory of rock-ice avalanches as they follow glacial gullies and enter fjords.
To understand tsunamis and the resulting tsunamis, researchers used supercomputers to perform high-resolution simulations of events.
“Conducting accurate computer simulations of such long-lasting, shaking tsunamis is a huge challenge,” Gabriel said.
Ultimately, the simulations were able to closely match the heights of real-world tsunamis as well as the slow oscillations of persistent tsunamis.
By integrating these disparate data sources, the researchers determined that the nine-day seismic signal was caused by a massive landslide and the resulting seike within Greenland's Dickson Fjord.
“It's exciting to work with an interdisciplinary, international team of scientists on such a puzzling problem,” said study co-author Robert Anthony, a geophysicist with the U.S. Geological Survey's Earthquake Hazards Program. “Ultimately, Researchers in many countries conducted extensive geophysical observations and numerical modeling to piece together the puzzle and fully understand what was happening.”
The results of the study demonstrate the complex cascading hazards of climate change in the polar regions. While no one was in the area at the time of the landslides and tsunami, the fjord's proximity to routes commonly used by cruise ships highlights the need to monitor the polar regions as climate change accelerates. For example, a 2017 landslide in Kalatfjord, western Greenland The resulting tsunami flooded the village of Nuugaatsiaq, destroying 11 houses and killing four people.
Now that scientists know what to look for, the results could also inspire researchers to look back at earthquake records to look for similar events, Gabriel said. Finding more seiches could help more clearly identify the conditions that cause this phenomenon.
“This suggests there is something out there that we still don't understand and have never seen before,” Ebeling said. Vibrating seismic sensor network. “The essence of science is trying to answer a question we don't know the answer to – that's why this work is so exciting.”
Magazine: scienceDOI 10.1126/science.adm9247
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