• Mozambique hit by another unprecedented tropical cyclone

    A few weeks after Cyclone Idai which wreaked havoc on central Mozambique (and eastern Zimbabwe), the country is dealing with another unprecedented event. Tropical Cyclone Kenneth made landfall in northern Mozambique on 25 April, near the border with Tanzania, in an area where no tropical cyclone has been observed since the satellite era. There is no record of two storms of such intensity striking Mozambique in the same season. It has now weakened into a depression.

  • California: Coastal impacts of climate change

    The United States Geological Survey (USGS) says that sea-level rise is going to wreak widespread destruction on California’s coastal communities, unless these communities take urgent action to mitigate to risks. “Even the storms today have significant risk to California’s coastline,” said Patrick Barnard, the lead author of the study. “There are about $12 billion in properties that are at risk of extreme storm today, but if you look out into the future, let’s say mid-century, those numbers roughly triple to about $30 billion of property at risk with just a little bit of sea level rise, and it goes up from there,” USGS researchers Patrick L. Barnard and colleagues write in Scientific Reports.

  • Hurricane Maria's extreme rainfall due mostly to human-caused climate change

    Hurricane Maria dropped more rain on Puerto Rico than any storm to hit the island since 1956, a feat due mostly to the effects of human-caused climate warming, new research finds.

  • Climate change: Our greatest national security threat?

    The climate century is here: the earth is warming, humans are to blame, and we must take immediate action now to prepare for climate change’s massively disruptive consequences. Mark Nevitt writes in Just Security that No longer can climate change be categorized solely as an environmental issue—it is a grave threat to national security. Indeed, it may be the threat. While there are many national security challenges facing the nation and the world, climate change is an aptly described “super wicked” problem that exacerbates and accelerates already existing threats.

  • Why the Great Plains has such epic weather

    From 78 degrees on Tuesday to snow on Wednesday? Swings like this aren’t unusual in the central United States, where weather can quickly shift from one extreme to another. What generates such “big weather” on the Great Plains?

  • Preparing San Francisco for future storms

    The San Francisco Bay Area has been pummeled this winter by storms packed with moisture from atmospheric rivers. San Francisco is partnering with the Berkeley Lab to assess how climate change may influence the intensity of atmospheric rivers and associated precipitation, and how those changes may impact San Francisco and its infrastructure.

  • Stern warning: Climate expert emphasizes the fierce urgency of now

    Prominent economist and policymaker Lord Nicholas Stern delivered a strong warning about the dangers of climate change in a talk at MIT on Tuesday, calling the near future “defining” and urging a rapid overhaul of the economy to reach net zero carbon emissions. “The next 20 years will be absolutely defining,” Stern told the audience, saying they “will shape what kind of future people your age will have.”

  • For a flooded Midwest, climate forecasts offer little comfort

    Floods are triggered by extreme rainfall events, often combined with ground conditions, such as saturated or frozen ground, that make it harder for water to percolate down into soil, which increases runoff. Global warming has the potential to intensify the Earth’s water cycle, which will alter the quantity, frequency, intensity and duration of rain and snowfall. As my research and work by others has shown, all of these changes raise the risk of floods for Midwest states.

  • A billion more people will be exposed to diseases as world temperatures rise

    As many as a billion people could be newly exposed to disease-carrying mosquitoes by the end of the century because of global warming, says a new study that examines temperature changes on a monthly basis across the world.

  • Few pathways to an acceptable climate future without immediate action: Study

    A new comprehensive study of climate change has painted over 5 million pictures of humanity’s potential future, and few foretell an Earth that has not severely warmed. But with immediate action and some luck, there are pathways to a tolerable climate future, scientists say.

  • Historic, widespread flooding to continue through May

    Nearly two-thirds of the Lower 48 states face an elevated risk for flooding through May, with the potential for major or moderate flooding in 25 states, according to NOAA’s U.S. Spring Outlook issued today. The majority of the country is favored to experience above-average precipitation this spring, increasing the flood risk.

  • Rapidly melting tall ice-cliffs may trigger faster sea-level rise

    Glaciers that drain ice sheets such as Antarctica or Greenland often flow into the ocean, ending in near-vertical cliffs. As the glacier flows into the sea, chunks of the ice break off in calving events. Although much calving occurs when the ocean melts the front of the ice, and ice cliff above falls down, a new study presents another method of calving: slumping. And this process could break off much larger chunks of ice at a quicker rate.

  • Offshore wind energy potential not exploited by U.S. energy companies

    When it comes to wind energy, the United States is sitting on a gold mine, so to speak. It’s a moment of untapped potential that, if harnessed properly, could transform the way the U.S. uses energy, one expert says.

  • Mitigating impact of rising seas, storms along California’s coast

    New coastal modeling research presents state, federal, and commercial entities with varying storm and sea level-rise scenarios to assist with planning for future infrastructure and mitigation needs along the California coast.

  • Droughts caused permanent loss to major California groundwater source

    California’s Central Valley aquifer, the major source of groundwater in the region, suffered permanent loss of capacity during the drought experienced in the area from 2012 to 2015.