Is drought killing California’s giant sequoias?

California’s giant sequoias are showing signs of stress — some have leaves that are drier and sparser than usual — and UC Berkeley tree biologist Anthony Ambrose thinks the drought is to blame.

Scientists Urge Ban on Salamander Imports to Fend Off New Fungus

Five California amphibian experts warn that a recently discovered fungus already devastating salamanders in Europe could imperil American salamanders, and urge the U.S. Fish and Wildlife Service to immediately halt salamander imports until there is a plan to detect and prevent the spread of the fungus.

Putting Energy Savings Programs to the Test

Philomathia Innovation Seed Fund recipients Catherine Wolfram and Meredith Fowlie carried out a rigorous study that found surprisingly low savings relative to costs in part of a nationwide effort to improve home energy-efficiency.

Leaving on a Biofueled Jet Plane

The problem is simple to understand. Molecules of carbon and other greenhouse gases absorb heat. The more greenhouse gases emitted into the atmosphere, the warmer the atmosphere becomes, exacerbating global climate change. Solving the problem is not so simple, especially with regards to aviation – the source of two-percent of the annual greenhouse gas emissions from human activity.

Power to the People

Philomathia Innovation Seed Fund recipient Eric Brewer works with tech savvy students in electrical engineering and computer science, urban planning, business, and economics to help developing countries gain access to affordable energy.

Cold-blooded animals find it hard to adjust to global warming

Cold-blooded and other animals that are unable to regulate their internal temperature may have a hard time tolerating global warming, according to an analysis by biologists from the University of California, Berkeley, and San Francisco State University.

The Economics of Change

Philomathia Innovation Seed Fund recipient Edward Miguel applies the tools of economics to such social issues as access to affordable energy and the possible links between climate and conflict.

Forecasting Change, Welcome or Not

Plant ecologist David Ackerly has calculated that some animals and plants would need to migrate as much as four miles a year to track their preferred temperature in a rapidly warming climate. 

New Material Captures Carbon at Half the Energy Cost

Capturing carbon from power plants is likely in the future to avoid the worst effects of climate change, but current technologies are very expensive. A new material, a diamine-appended metal-organic framework, captures and releases CO2 with much reduced energy costs compared to today’s technologies, potentially lowering the cost of capturing this greenhouse gas.

Warmer, drier climate altering forests statewide

Historical California vegetation data that more than once dodged the dumpster have now proved their true value, documenting that a changing forest structure seen in the Sierra Nevada has actually happened statewide over the past 90 years.

Solving an Organic Semiconductor Mystery

Organic semiconductors are prized for light emitting diodes (LEDs), field effect transistors (FETs) and photovoltaic cells. As they can be printed from solution, they provide a highly scalable, cost-effective alternative to silicon-based devices. Uneven performances, however, have been a persistent problem. That’s now changed.

Tropical paradise inspires virtual ecology lab

An international collaboration including Neil Davies, Director of UC Berkeley's Gump Station, is preparing to create a digital representation of of the Pacific island of Moorea to create a virtual lab to test and hypothesize the impact of human activities. 

From the Bottom Up: Manipulating Nanoribbons at the Molecular Level

Researchers at Lawrence Berkeley National Laboratory and the University of California, Berkeley, have developed a new precision approach for synthesizing graphene nanoribbons from pre-designed molecular building blocks. Using this process the researchers have built nanoribbons that have enhanced properties—such as position-dependent, tunable bandgaps—that are potentially very useful for next-generation electronic circuitry.

New Discovery Opens Door for Radical Reduction in Energy Consumed by Digital Devices

A new study led by engineers at UC Berkeley and CITRIS describes the first direct observation of a long-hypothesized but elusive phenomenon called “negative capacitance.” The work describes a unique reaction of electrical charge to applied voltage in a ferroelectric material that could open the door to a radical reduction in the power consumed by transistors and the devices containing them.

Lightning Expected to Increase by 50 Percent with Global Warming

Today’s climate models predict a 50 percent increase in lightning strikes across the US during this century as a result of warming temperatures associated with climate change. UC Berkeley climate scientists look at predictions of precipitation and cloud buoyancy in 11 different climate models and conclude that their combined effect will generate more frequent electrical discharges to the ground.

Tobacco Gets a Makeover as New Source for Biofuel

Peggy Lemaux, UC Berkeley cooperative extension specialist, is working with Berkeley Lab and the University of Kentucky to develop a genetically engineered tobacco plant that will produce oil that can be used as a biofuel. KQED Science wrote this story about the research effort.

Top graduating senior makes a splash in water policy

Rebecca Peters’ IQ score measured so low in fourth grade that her school did not deem her to be college material. Her parents didn’t buy it, and neither did she. Today she’s a diehard clean-water-access warrior, the winner of three of America’s top 10 scholarships — and UC Berkeley’s top graduating senior

Study says green buildings don’t create happier workers, yet

People working in buildings certified under LEED’s green building standard appear no more satisfied with the quality of their indoor workplace environments than those toiling in conventional buildings, according to new research from UC Berkeley, and the University of Nottingham in the United Kingdom.

Bottom-up model predicts depth to fresh bedrock under hillslopes

William Dietrich and graduate student Daniella Rempe have proposed a method to determine underground details without drilling, potentially providing a more precise way to predict water runoff, the moisture available to plants, landslides and how these will respond to climate change.

Wind Power Can Be Cost-Comparable, New Analysis Reveals

The costs of using wind energy and natural gas for electricity are virtually equal when accounting for the full private and social costs of each, making wind a competitive energy source for the United States, according to a new study on the federal tax credit for wind energy.

CHAMACOS: How pesticides harm young minds

Children born to mothers who work in California’s pesticide-treated fields show signs of developmental problems, according the pathbreaking CHAMACOS study, led by UC Berkeley professor Dr. Brenda Eskenazi in the Center for Environmental Research and Children’s Health.

Seafloor carpet catches waves to generate energy

UC Berkeley Professor Reza Alam, an expert in wave mechanics, is looking to harness the power of big ocean waves by using the seafloor “carpet”, which he proposes will convert ocean waves into usable energy.

Why state’s water woes could be just beginning

As 2013 came to a close, the media dutifully reported that the year had been the driest in California since records began to be kept in the 1840s. UC Berkeley paleoclimatologist B. Lynn Ingram didn’t think the news stories captured the seriousness of the situation.

Eel River Observatory seeks clues to watershed’s future

University of California, Berkeley, scientists will receive $4,900,000 over the next five years to study the nearly 10,000 square kilometer Eel River watershed in Northern California and how its vegetation, geology and topography affect water flow all the way to the Pacific Ocean.

Symposium spotlights clean-technology solutions

In the atrium of Sutardja Dai Hall, a screen displayed real-time results as audience members texted votes they based on what they’d just seen on stage. The audience was voting on favorites from a spate of innovative, environmentally friendly energy technologies being developed and refined through Cleantech to Market (C2M), a unique collaboration of UC Berkeley and the Lawrence Berkeley National Laboratory.