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Updated: 1 hour 29 min ago

Sinking land will exacerbate flooding from sea level rise in Bay Area

Wed, 07/03/2018 - 20:14
Hazard maps use estimated sea level rise due to climate change to determine flooding risk for today's shoreline, but don't take into account that some land is sinking. A precise study of subsidence around San Francisco Bay shows that for conservative estimates of sea level rise, twice the area is in danger of flooding by 2100 than previously thought. Some landfill is sinking 10 mm per year, threatening the airport and parts of Silicon Valley.

Flood risk from American rivers is greatly underestimated

Wed, 28/02/2018 - 17:25
A groundbreaking new study has found that 41 million Americans are at risk from flooding rivers, which is more than three times the current estimate --- based on regulatory flood maps --- of 13 million people.

Stable gas hydrates can trigger landslides

Tue, 20/02/2018 - 22:12
Like avalanches onshore, there are different processes that cause submarine landslides. One very widespread assumption is that they are associated with dissociating gas hydrates in the seafloor. However, scientists have now found evidence that the context could be quite different.

Why the seafloor starts moving

Tue, 13/02/2018 - 18:04
When the seabed loses its stability and starts to move, it often happens in much larger dimensions than landslides ashore -- and at slopes with very low gradients. At the same time, discplacement of large amounts of sediment under water scan cause devastating tsunamis. However, why and when submarine landslides develop is hardly understood. Marine scientists have now published possible causes based on observations on submarine landslides off the coast of northwest Africa.

Tiny fossils, huge landslides: Are diatoms the key to Earth's biggest slides?

Mon, 12/02/2018 - 19:34
The biggest landslides on Earth aren't on land, but on the seafloor. These mega-slides can move thousands of cubic kilometers of material, and sometimes trigger tsunamis. Yet, remarkably, they occur on nearly flat slopes of less than three degrees.

Coastal water absorbing more carbon dioxide

Thu, 01/02/2018 - 00:47
Oceanographers reveal that the water over the continental shelves is shouldering a larger than expected portion of atmospheric carbon dioxide. The findings may have important implications for scientists focused on understanding how much carbon dioxide can be released into the atmosphere while still keeping warming limited.

Global warming poses substantial flood risk increase for Central and Western Europe

Mon, 29/01/2018 - 15:29
Europe is expected to see a considerable increase in flood risk in coming years, even under an optimistic climate change scenario of 1.5°C warming compared to pre-industrial levels.

Large volcanic island flank collapses trigger catastrophic eruptions

Thu, 18/01/2018 - 20:29
New research not only implies a link between catastrophic volcanic eruptions and landslides, but also suggests that landslides are the trigger. At the heart of Tenerife and standing almost 4 km high, Teide is one of the largest volcanoes on Earth. Over a period of several hundred thousand years, the previous incarnations of Teide have undergone a repeated cycle of very large eruptions, collapse, and regrowth.

NASA calculated heavy rainfall leading to California mudslides

Fri, 12/01/2018 - 04:40
Winter rains falling on recently burned ground triggered deadly mudslides in Santa Barbara County, California on Jan. 9. NASA calculated the amount of rain fall between Jan. 8 and 10, 2018 and calculated the potential for landslides.

How much soil goes down the drain: New data on soil lost due to water

Fri, 15/12/2017 - 18:10
According to a new study, almost 36 billion tons of soil is lost every year due to water, and deforestation and other changes in land use make the problem worse. The study also offers ideas on how agriculture can change to become a part of the solution from being part of the problem.

The planet’s largest landslides happen on submarine volcanoes

Tue, 12/12/2017 - 17:48
Large volume submarine landslides, triggered by the inception and growth of submarine volcanos, represent among the largest mass movements of sediment on Earth’s surface. These landslides could potentially cause tsunamis, and represent a significant, and as yet unaccounted for marine hazard.