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Impact of demographic development on fires in ecosystems as strong as that of climate change
Every year, about 350 million hectares of land are devastated by fires worldwide. This corresponds to about the size of India. To estimate the resulting damage to human health and economy, precise prognosis of the future development of fires is of crucial importance. Previous studies often considered climate change to be the most important factor. Now, a group of scientists has found that population development has the same impact at least.
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Learning to live with wildfires: how communities can become “fire-adapted”
In recent years wildfire seasons in the western United States have become so intense that many of us who make our home in dry, fire-prone areas are grappling with how to live with fire. We know that fuel reduction in dry forests can mitigate the effects of wildfires. After decades of fire exclusion, dense and dry forests with heavy accumulations of fuel and understory vegetation often need to be treated with a combination of thinning and prescribed burning. Native peoples, less than 150 years ago, proactively burned the landscapes we currently inhabit – for personal safety, food production, and enhanced forage for deer and elk. In some places, people still maintain and use traditional fire knowledge. As we too learn to be more fire-adapted, we need to embrace fire not only as an ongoing problem but an essential part of the solution.
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Coconut shells inspire design ideas for earth-quake proof buildings
Coconuts are renowned for their hard shells, which are vital to ensure their seeds successfully germinate. Coconut palms can grow 30-meter high, meaning that when the ripe fruits fall to the ground their walls have to withstand the impact to stop them from splitting open. The specialized structure of coconut walls could help to design buildings that can withstand earthquakes and other natural disasters.
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Electromagnetic fields could be used in tsunami early warning
Could electromagnetic (EM) fields be used in tsunami early warning? New research shows that important focal parameters of tsunamigenic earthquakes — particularly fault dip direction — can be extracted from tsunami-borne EM fields.
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Lessons learned from the U.S.-Canada cross-border experiment
A tornado has just devastated a community on the border between the United States and Canada. Paramedics scramble to bring patients from over-crowded hospitals across the border. Communication blackouts and downed trees force ambulances to weave their way through blowing debris, fallen electrical lines, and car wrecks. The time for a routine trip from the injury site to the hospital has now tripled. While this did not really happen, it was the focus in April when the DHS S&T and several Canadian government agencies collaborated on a cross-border experiment with a focus on preparing emergency responders for this type of scenario.
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Colorado county adopts NIST community resilience guidelines
The Boulder County Collaborative, a partnership of Boulder County, Colorado, communities formed in response to the catastrophic floods that struck the region in September 2013, has used the NIST Community Resilience Planning Guide for Buildings and Infrastructure Systems to develop and adopt its own resilience design performance standard for community facilities and infrastructure systems.
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State budgets $10 million for earthquake early warning
Governor Jerry Brown has signed a 2016-17 state budget that provides $10 million to help launch a statewide earthquake early-warning system. Although California passed a mandate in 2013 to create a statewide earthquake warning system, this is the first money appropriated by the state to make it a reality. The federal government has already provided $13.2 million to improve and test a prototype West Coast early-warning system, but this is much less than the $38 million in buildout costs and $16 million per year in operating costs needed to establish a fully functioning system serving California, Oregon, and Washington.
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New analysis reveals large-scale motion around San Andreas Fault System
An array of GPS instruments near the San Andreas Fault System in Southern California detects constant motion of Earth’s crust — sometimes large, sudden motion during an earthquake and often subtle, creeping motion. The researchers discovered nearly 125 mile-wide “lobes” of uplift and subsidence — a few millimeters of motion each year — straddling the fault system. This large scale motion was previously predicted in models but until now had not been documented.
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Waterworld: Learning to live with flooding
Flash floods, burst riverbanks, overflowing drains, contaminants leaching into waterways: some of the disruptive, damaging, and hazardous consequences of having too much rain. But can cities be designed and adapted to live more flexibly with water – to treat it as friend rather than foe?
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Thirty-one leading scientific societies call for action on climate change
In a consensus letter to U.S. policymakers, a partnership of thirty-one leading nonpartisan scientific societies the other day reaffirmed the reality of human-caused climate change, noting that greenhouse gas emissions “must be substantially reduced” to minimize negative impacts on the global economy, natural resources, and human health. Climate-change impacts in the United States have already included increased threats of extreme weather events, sea-level rise, water scarcity, heat waves, wildfires, and disturbances to ecosystems and animals, the intersociety group reported.
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Looking for ways to predict response to hurricane evacuation orders
Millions of people will likely be in harm’s way as a new hurricane season unfolds in the United States. The National Oceanic and Atmospheric Administration predicts up to eight hurricanes in the 2016 season, and as many as four major storms with winds of 111 miles per hour or more. What people do – or do not do – to get out of harm’s way is of keen interest to disaster and emergency response officials. Plans and contingencies work best when they are based on reliable predictions.
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Climate assessment must be relevant and useful to policymakers
Climate change assessments must be more relevant to policymakers’ needs, experts say. They argue that coming off the Paris agreement late last year, ambition for fighting climate change is high. They assert that groups like the Intergovernmental Panel on Climate Change (IPCC) should capitalize on this increased enthusiasm by integrating studies and presenting their results in ways that are useful to policymakers.
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We need better information to understand extreme weather
Scientists need more credible and relevant information to help communities become more resilient to extreme weather events such as floods. Researchers need improved techniques to be able to understand why the climate is changing, and the part humans play in this process, experts say.
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Crop breeding is not keeping pace with climate change
Crop yields will fall within the next decade due to climate change unless immediate action is taken to speed up the introduction of new and improved varieties, experts have warned. The researchers focused on maize in Africa but the underlying processes affect crops across the tropics.
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Datacasting helps first responders with live video streaming via smartphone
When torrential storms caused widespread flooding in Houston, Texas, in mid-April, first responders needed a way securely to share information amongst their many organizations. Luckily the DHS S&T First Responders Group’s (FRG) datacasting system was available. Datacasting provides public safety users with the capability to transmit secure video and data over existing broadcast television signals to a targeted audience. Even in an emergency situation, where other wireless services often fail due to network congestion, datacasting still provides a reliable platform to quickly send large files.
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More headlines
The long view
Proactively Planning for Community Relocation Before and After Climate Disasters
Between 1980 and mid-2023, 232 billion-dollar disasters occurred in the U.S. Gulf Coast region, with the number of disasters doubling annually since 2018. As the frequency, intensity, and destructiveness of climate change-driven disasters increase, accompanied by an increase in recovery costs, more experts are calling for a managed retreat of entire communities from disaster-prone areas to safer ground.
Number of People Affected by Tropical Cyclones Has Increased Sharply Since 2002
The number of people affected by tropical cyclones has nearly doubled from 2002 to 2019, reaching nearly 800 million people in 2019, according to a new study. More people are affected by tropical cyclones in Asia than any other region, but every affected world region saw an increase in the number of people exposed to tropical cyclones, which are expected to become more intense and possibly more frequent as the climate warms.
Coastal Populations Set to Age Sharply in the Face of Climate Migration
As climate change fuels sea level rise, younger people will migrate inland, leaving aging coastal populations — and a host of consequences — in their wake. While destination cities will work to sustainably accommodate swelling populations, aging coastal communities will confront stark new challenges.
Damaging Thunderstorm Winds Increasing in Central U.S.
Destructive winds that flow out of thunderstorms in the central United States are becoming more widespread with warming temperatures. New research shows that the central U.S. experienced a fivefold increase in the geographic area affected by damaging thunderstorm straight line winds in the past 40 years.