Human influence detected in changing seasons

July 19, 2018- 
For the first time, scientists from Lawrence Livermore National Laboratory (LLNL) and five other organizations have shown that human influences significantly impact the size of the seasonal cycle of temperature in the lowest layer of the atmosphere. To demonstrate this, they applied a so-called "fingerprint" technique. Fingerprinting seeks to separate human and natural influences on climate...

Study on impact of climate change on snowpack

April 18, 2017- 
An international team of scientists, including one from Lawrence Livermore National Laboratory (LLNL), has found that up to 20 percent loss in the annual maximum amount of water contained in the Western United States’ mountain snowpack in the last three decades is due to human influence. Peak runoff in streams and rivers of the Western U.S. is strongly influenced by melting of accumulated...

Cloudy feedback on global warming

Oct. 31, 2016- 
Lawrence Livermore National Laboratory researchers have identified a mechanism that causes low clouds -- and their influence on Earth’s energy balance -- to respond differently to global warming, depending on their spatial pattern and location. The results imply that studies relying solely on recent observed trends underestimated how much Earth will warm due to increased carbon dioxide. The...

Scientists find evidence for climate change in satellite cloud record

July 11, 2016- 
Scientists have found that changes in cloud patterns during the last three decades match those predicted by climate model simulations. These cloud changes are likely to have had a warming effect on the planet. Records of cloudiness from satellites originally designed to monitor weather are plagued by erroneous variability related to changes in satellite orbit, instrument calibration and other...

Climate models underestimate global warming by exaggerating cloud 'brightening'

April 7, 2016- 
Researchers at Lawrence Livermore National Laboratory and Yale University have found that climate models are aggressively making clouds "brighter" as the planet warms. This may be causing models to underestimate how much global warming will occur due to increasing carbon dioxide. The research appears in the April 8 edition of Science.As the atmosphere warms, clouds become increasingly...

Consequences of today's carbon emissions will linger for thousands of years, study finds

Feb. 8, 2016- 
The Earth may suffer irreversible damage that could last tens of thousands of years because of the rate humans are emitting carbon into the atmosphere.In a new study in Nature Climate Change, researchers at Oregon State University, Lawrence Livermore National Laboratory and collaborating institutions found that the longer-term impacts of climate change go well past the 21st century."Much of...

Climate models overestimate rainfall increases

Dec. 10, 2015- 
Lawrence Livermore researchers and collaborators have found that most climate models overestimate the increase in global precipitation due to climate change.Specifically, the team looked at 25 models and found they underestimate the increase in absorption of sunlight by water vapor as the atmosphere becomes moister, and therefore overestimate increases in global precipitation.The team found...

It's solid: storing hydrogen in a new form

Oct. 8, 2015- 
As part of a tri-lab consortium, Lawrence Livermore National Laboratory researchers will develop tools and understanding necessary for designing new solid-state materials for storing hydrogen gas.Storage of hydrogen onboard vehicles is one of the critical enabling technologies for hydrogen-fueled transportation systems that can reduce oil dependency and mitigate the long-term effects of...

Soil organic matter vulnerable to climate change

March 31, 2015- 
Soil organic matter, long thought to be a semi-permanent storehouse for ancient carbon, may be much more vulnerable to climate change than previously thought.Plants direct between 40 percent and 60 percent of photosynthetically fixed carbon to their roots and much of this carbon is secreted and then taken up by root-associated soil microorganisms. Elevated carbon dioxide (CO2) concentrations...

'Science On Saturday' to explore groundwater and the impacts of drought and climate change

Feb. 18, 2015- 
Who: Lawrence Livermore scientist Andy Thompson and Tracy High School teacher Erin McKay will present "Hydrology of an ‘Ant Farm’," a presentation examining the environmental impact of drought and climate change.What: This informative and entertaining lecture will touch on groundwater interactions with surface water and surface ecosystems. The presenters will discuss some of the real or...

Lawrence Livermore research finds early Mesoamericans affected by climate change

Jan. 27, 2015- 
Scientists have reconstructed the past climate for the region around Cantona, a large fortified city in highland Mexico, and found the population drastically declined in the past, at least in part because of climate change.The research appears in the online edition of the Proceedings of the National Academy of Sciences for the week of Jan. 26.Lawrence Livermore researcher Susan Zimmerman and...

Top 10 science and technology stories of 2014

Dec. 17, 2014- 
In 2014, Lawrence Livermore National Laboratory (LLNL) built on a 62-year tradition of translating basic science into technologies that ensure national security, address pressing real world problems and expand the boundaries of fundamental science.The top stories of the year are a reflection of the Laboratory’s ability to apply its core national security competencies to a broad set of rapidly...

California to experience more droughts, wildfires in the future

May 7, 2014- 
California will experience increased heat, drought and insect outbreaks and more wildfires, according to a new report released Tuesday by the White House.The National Climate Assessment reportalso explains how California will have to deal with declining water supplies, reduced agricultural yields, health impacts in cities due to heat and flooding and erosion in coastal areas.The report...

Change in Pacific nitrogen content tied to climate change

Dec. 15, 2013- 
Using deep sea corals gathered near the Hawaiian Islands, a Lawrence Livermore scientist, in collaboration with UC Santa Cruz colleagues, has determined that a long-term shift in nitrogen content in the Pacific Ocean has occurred as a result of climate change. Overall nitrogen fixation in the North Pacific Ocean has increased by about 20 percent since the mid 1800s -- a shift similar to major...

LLNL scientists find precipitation, global warming link

Nov. 11, 2013- 
The rain in Spain may lie mainly on the plain, but the location and intensity of that rain is changing not only in Spain but around the globe.A new study by Lawrence Livermore National Laboratory scientists shows that observed changes in global (ocean and land) precipitation are directly affected by human activities and cannot be explained by natural variability alone. The research appears in...

LLNL wins four tech transfer regional awards

Nov. 1, 2013- 
Lawrence Livermore National Laboratory (LLNL) has again received recognition this year for its work to move breakthrough technologies into the commercial marketplace.Livermore researchers and tech transfer professionals garnered four awards in the Federal Laboratory Consortium's (FLC) Far West Regional competition.This year's awards, presented last week during the FLC's three-day regional...

Former Lawrence Fellow David Lobell receives MacArthur fellowship

Sept. 30, 2013- 
Former Lawrence Fellow David Lobell ,  who has done groundbreaking work on the agricultural impacts of climate change, has received a MacArthur fellowship.He is among 24 individuals honored this year by the John D. and Catherine T. MacArthur Foundation , which recognizes exceptionally creative individuals with a track record of achievement and the potential for even more significant...

Lawrence Livermore study finds human activity affects vertical structure of atmospheric temperature

Sept. 17, 2013- 
Human influences have directly impacted the latitude/altitude pattern of atmospheric temperature. That is the conclusion of a new report by scientists from Lawrence Livermore National Laboratory and six other scientific institutions. The research compares multiple satellite records of atmospheric temperature change with results from a large, multi-model archive of simulations."Human...

Guilderson takes the guess work out of climate change

May 30, 2012- 
Climate change and the carbon cycle are tied so closely that geochemist Tom Guilderson can study an isotope of carbon and find out how the climate has varied in the past, how rapidly it changed and the external and internal factors that may have affected it. That was the subject of Guilderson's talk "Radiocarbon: Chronometer and Geochemical Tracer of the Carbon Cycle," Tuesday, as part...

Increased production of smelly sulfur compound in Southern Ocean tied to climate change

June 23, 2011- 
LIVERMORE, Calif. -- An organic compound that smells like cabbage and has been called the "smell of the sea" could be more sensitive to global climate change than commonly believed. In a recent report, a Livermore researcher, along with colleagues from Los Alamos and Oak Ridge national laboratories and the New Mexico Institute of Mining and Technology, found through computer modeling...