Tag: Climate

Climate Change Triggers Landslide, Sending Shockwaves Across the Globe for 9 Days

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Greenland Landslide Sparks Nine Days of Global Tremors, Study Reveals

A Catastrophic Collapse Triggered by Climate Change

In September 2023, a massive landslide in East Greenland sent shockwaves across the globe for nine consecutive days. The landslide, caused by glacier melting linked to climate change, triggered an earthquake and a 200-meter-high tsunami in a narrow fjord, according to a new study.

The landslide, originating from a 1.2-kilometer-high mountain peak, caused seismic tremors that reverberated throughout Earth’s crust. These ongoing vibrations baffled scientists, who initially struggled to explain the unusual seismic activity.

Damage and Global Impact

Though no one was injured, the event caused significant damage to infrastructure at an unoccupied research station on Ella Island, costing approximately $200,000. The study, conducted by an international team of researchers, including scientists from University College London, revealed that the landslide was a direct result of glacier thinning. As the glacier weakened, the mountain rock-face above it could no longer be supported, leading to the collapse.

Unprecedented Seismic Activity

The seismic signals recorded were unlike anything seen before. Stephen Hicks, co-author of the study and a researcher from University College London, expressed his astonishment: “When I first saw the seismic signal, I was completely baffled. We’ve never recorded such a long-lasting, globally traveling seismic wave with only a single frequency of oscillation.”

The researchers used a combination of field data, satellite imagery, and computer models to reconstruct the event. Their findings, published in the journal Science, revealed how the narrow fjord amplified the sloshing of water, allowing it to continue for nine days without dissipating. This relentless back-and-forth motion sent vibrations deep into the Earth’s crust, affecting seismic sensors worldwide.

Modeling the Tsunami’s Power

Using a mathematical model, the team recreated the landslide and the fjord’s unique structure to understand how the water movement sustained for so long. The simulation closely matched the real-world tsunami, including the height of the waves and the frequency of the seismic vibrations that circled the globe every 90 seconds.

Warning of Future Events

As climate change continues to accelerate glacier melting, such destructive landslides could become more frequent, the researchers warned. Co-author Alice Gabriel from the Scripps Institution of Oceanography emphasized the changing dynamics of Earth:
“Climate change is shifting what is typical on Earth, and it can set unusual events into motion.”

This study highlights how the interconnected impacts of climate change on glaciers, oceans, and land masses can create cascading hazards, with potentially far-reaching consequences.

Urgent Climate Risks Loom for Tropics and Subtropics

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A recent study reveals that tropical and subtropical regions, home to nearly 75% of the global population, are likely to face severe and swift changes in extreme temperatures and rainfall within the next two decades unless greenhouse gas emissions are significantly reduced.

The Role of Greenhouse Gas Emissions

Greenhouse gas emissions are the key drivers of climate change, pushing the world towards more unpredictable and extreme weather events. If left unchecked, these emissions could cause devastating consequences for billions of people. However, if the world manages to cut emissions to meet the goals outlined in the Paris Agreement, around 20% of the global population—or approximately 1.5 billion people—would still face significant weather-related risks.

Paris Agreement: A Global Target

The Paris Agreement aims to cap the global temperature increase to 1.5°C above pre-industrial levels. This threshold is crucial to prevent catastrophic weather events, such as intense heatwaves and unrelenting rainfall. Researchers at the CICERO Center for International Climate Research in Norway, who led this study, emphasized the importance of meeting these goals to mitigate climate risks for vulnerable populations.

Regions at the Highest Risk

The study, published in Nature Geoscience, highlights several regions that are particularly vulnerable. These include mid-to-high latitude countries in the northern hemisphere, tropical Asian countries, and equatorial African nations. Many of these regions are home to low-income countries that lack the resources to adapt to such rapid climate shifts, putting them at even higher risk.

Southern Asia and Arabian Peninsula: A Hotspot for Extreme Weather

Southern Asia and the Arabian Peninsula are projected to endure severe consequences from both rising temperatures and shifting rainfall patterns. Even if global efforts succeed in achieving net-zero emissions by 2050, these regions will likely experience unprecedented climate-related challenges.

A Focus on Regional Impacts

Lead author Carley Iles stressed the importance of focusing on regional climate changes, as these are more relevant to the daily experiences of people and ecosystems than global averages. Regional variations in extreme weather patterns will likely determine how different areas are affected over the coming decades.

Rapid Changes and Their Impact on Communities

The study explains that rapid shifts in extreme weather events will disproportionately contribute to the overall impacts of climate change. These include more frequent and intense heatwaves, which could lead to heat stress, higher mortality rates, damage to ecosystems, and reduced agricultural yields. Additionally, extreme rainfall may result in devastating floods, damage to infrastructure, and harm to water quality.

Multiple Hazards Amplify Vulnerability

The combination of different climate hazards—like rising temperatures and increased rainfall—will make certain regions more vulnerable. When extreme events occur simultaneously, the risks to human health, agriculture, and infrastructure become more severe, making it harder for communities to recover.

The Effect of Air Pollution Reduction

The study also explores the impact of cleaning up air pollution, particularly in Asia. Reducing air pollution, while necessary for public health, could paradoxically worsen climate conditions by accelerating the increase in extreme heat and affecting seasonal monsoons.

The Complex Balance of Climate and Pollution

Laura Wilcox from the University of Reading in the UK, co-author of the study, highlighted this complex issue. While cleaning the air is essential for reducing health risks, it could lead to stronger changes in extreme weather conditions, especially in Asia, where pollution has previously masked some of the effects of global warming.

Conclusion

The findings from this study underline the urgency of addressing both climate change and pollution simultaneously. While mitigating air pollution is vital for health, reducing greenhouse gas emissions is equally important to limit the worst impacts of extreme weather on the world’s most vulnerable populations. Without swift and coordinated action, billions could face the brunt of these rapid changes in the coming decades.