California
NASA scientists study California plant ‘sweat’ to predict wildfire severity
What makes a plant dangerously flammable? Amid a megadrought in California, the solutions might present essential perception on sort out a wildfire season that stretches longer and burns hotter by the yr.
With the assistance of a thermal radiometer from house, a workforce of NASA researchers discovered that the speed at which a plant “sweats” when it will get too scorching is a key predictor of how severely an space will burn if it catches fireplace.
Like people, crops launch water to chill themselves down, stated Christine Lee, a analysis scientist at NASA’s Jet Propulsion Laboratory in Southern California.
“However once they don’t have sufficient water, they really shut their pores to preserve that water after which they’ll begin heating up,” Lee stated. “They don’t get pleasure from that cooling any longer.”
Normally, a slower price of sweating — referred to as evapotranspiration in flora — signifies that a plant isn’t getting sufficient water, researchers stated.
Whereas some areas, together with pine forests, noticed optimistic correlations between dry crops burning hotter than hydrated ones, the findings weren’t at all times intuitive. Areas dominated by grasslands or chaparral tended to be extra flamable once they have been quenched, probably as a result of the water stimulated extra development and subsequently extra gas.
To trace the speed of evapotranspiration, researchers accumulate information by an instrument referred to as ECOSTRESS, which measures crops’ temperature as they run out of water. The instrument operates from the Worldwide House Station, which orbits the earth about as soon as each 90 minutes.
“Now we have excellent spatial decision, that means we will resolve element on the stage of, say, a soccer area,” Lee stated. “And that offers us a greater view into circumstances on the bottom.”
For the examine, researchers targeted on six areas of California in 2019 and 2020; three areas within the Southern California mountains and three within the Sierra Nevada, NASA officers stated. All the areas have been later blackened by wildfires.
In a latest paper, which was printed in International Ecology and Biogeography, “researchers discovered that water-stress-related variables, together with elevation, have been dominant predictors of burn severity in areas struck by three Southern California wildfires in 2020: the Bobcat Hearth within the Angeles Nationwide Forest, together with the Apple and El Dorado fires within the San Bernardino Nationwide Forest,” NASA officers stated.
Lee stated the examine is one in every of a number of areas of plant-based analysis carried out on the house station. Different researchers are conducting experiments to know develop crops in microgravity, in case people wish to finally inhabit one other planet and be capable to feed themselves.
“It’s additionally this actually superior alternative to develop and take a look at new Earth science devices, which finally may result in their very own standalone satellite tv for pc mission,” Lee stated.
The analysis is a part of NASA’s ongoing efforts to know local weather change and its impacts from a number of views, Lee stated.
The findings are supposed to tell on communities on determine and deal with high-risk fireplace areas earlier than they burn. This might embrace forest thinning, prescribed fires or the removing of dried-out fuels, Lee stated.
“Now we have a greater sense of what areas, due to their vegetation stress, may be extra susceptible to burning extra severely,” Lee stated. “Maybe we may also help mitigate that upfront.”
Megan Cassidy is a San Francisco Chronicle workers author. E-mail: megan.cassidy@sfchronicle.com Twitter: @meganrcassidy
California
California proposes its own EV buyer credit — which could cut out Elon Musk's Tesla
- Gov. Gavin Newsom plans to revive California’s EV rebate if Trump ends the federal tax credit.
- But Tesla, the largest maker of EVs, would be excluded under the proposal.
- Elon Musk criticized Tesla’s potential exclusion from the rebate.
California Gov. Gavin Newsom is preparing to step in if President-elect Donald Trump fulfills his promise to axe the federal electric-vehicle tax credit — but one notable EV maker could be left out.
Newsom said Monday if the $7,500 federal tax credit is eliminated he would restart the state’s zero-emission vehicle rebate program, which was phased out in 2023.
“We will intervene if the Trump Administration eliminates the federal tax credit, doubling down on our commitment to clean air and green jobs in California,” Newsom said in a statement. “We’re not turning back on a clean transportation future — we’re going to make it more affordable for people to drive vehicles that don’t pollute.”
The rebates for EV buyers would come from the state’s Greenhouse Gas Reduction Fund, which is funded by polluters of greenhouse gases under a cap-and-trade program, according to the governor’s office.
But Tesla’s vehicles could be excluded under the proposal’s market-share limitations, Bloomberg News first reported.
The governor’s office confirmed to Business Insider that the rebate program could include a market-share cap which could in turn exclude Tesla or other EV makers. The office did not share details about what market-share limit could be proposed and also noted the proposal would be subject to negotiations in the state legislature.
A market-share cap would exclude companies whose sales account for a certain amount of total electric vehicle sales. For instance, Tesla accounted for nearly 55% off all new electric vehicles registered in California in the first three quarters of 2024, according to a report from the California New Car Dealers Association. By comparison, the companies with the next highest EV market share in California were Hyundai and BMW with 5.6% and 5% respectively.
Tesla sales in California, the US’s largest EV market, have recently declined even as overall EV sales in the state have grown. Though the company still accounted for a majority of EV sales in California this year as of September, its market share fell year-over-year from 64% to 55%.
The governor’s office said the market-share cap would be aimed at promoting competition and innovation in the industry.
Elon Musk, who has expressed support for ending the federal tax credit, said in an X post it was “insane” for the California proposal exclude Tesla.
The federal electric vehicle tax credit, which was passed as part of the Biden administration’s Inflation Reduction Act in 2022, provides a $7,500 tax credit to some EV buyers.
Musk, who is working closely with the incoming Trump administration, has expressed support for ending the tax credit. He’s set to co-lead an advisory commission, the Department of Government Efficiency, which is aimed at slashing federal spending.
The Tesla CEO said on an earnings call in July that ending the federal tax credit might actually benefit the company.
“I think it would be devastating for our competitors and for Tesla slightly,” Musk said. “But long-term probably actually helps Tesla, would be my guess.”
BI’s Graham Rapier previously reported that ending the tax credit could help Tesla maintain its strong standing in the EV market by slowing its competitors growth.
Prior to the EV rebate proposal, Newsom has already positioned himself as a foil to the incoming Trump administration. Following Trump’s election win the governor called on California lawmakers to convene for a special session to discuss protecting the state from Trump’s second term.
“The freedoms we hold dear in California are under attack — and we won’t sit idle,” Newsom said in a statement at the time.
California
California Gov. Gavin Newsom says state will provide rebates if Trump removes tax credit for electric vehicles
California Gov. Gavin Newsom said the state will provide rebates to residents if President-elect Donald Trump’s incoming administration does away with a federal tax credit for electric vehicles.
In a news release issued Monday, Newsom said he would restart the state’s Clean Vehicle Rebate Program, which provided financial incentives on more than 590,000 vehicles before it was phased out late 2023.
“We will intervene if the Trump Administration eliminates the federal tax credit, doubling down on our commitment to clean air and green jobs in California,” Newsom said. “We’re not turning back on a clean transportation future — we’re going to make it more affordable for people to drive vehicles that don’t pollute.”
The federal rebates on new and used electric vehicles were implemented in the Inflation Reduction Act that President Joe Biden signed into law in 2022. When Trump’s second term in office begins next year, he could work with Congress to change the rules around those rebates. Those potential changes could limit the federal rebates, including by reducing the amount of money available or limiting who is eligible.
Limiting federal subsidies on electric vehicle purchases would hurt many American automakers, including Ford, General Motors and the EV startup Rivian. Tesla, which also builds its automobiles in the United States, would take a smaller hit since that company currently sells more EVs and has a higher profit margin than any other EV manufacturer.
Newsom also announced earlier this month that he will convene a special session “to protect California values,” including fundamental civil rights and reproductive rights, that he said “are under attack by this incoming administration.”
“Whether it be our fundamental civil rights, reproductive freedom, or climate action — we refuse to turn back the clock and allow our values and laws to be attacked,” Newsom said on X on Nov. 7.
A spokesperson for Trump did not immediately respond to a request for comment.
This isn’t the first time California will be taking action against the Trump’s administration concerning clean transportation legislation.
In 2019, California and 22 other states sued his administration for revoking its ability to set standards for greenhouse gas emission and fuel economy standards for vehicles, The Associated Press reported.
California sued the Trump administration over 100 times during his first term, primarily on matters including gun control, health care, education and immigration, the Los Angeles Times reported.
California
45 Years Later, California Murder Mystery Solved Through DNA Evidence
A 45-year-old cold case of a 17-year-old girl brutally raped and murdered has been resolved, bringing closure to the family. On February 9, 1979, Esther Gonzalez walked from her parents’ home to her sister’s in Banning, California, roughly 137 km east of Los Angeles. She never arrived. The next day, her body was discovered in a snowpack near a highway in Riverside County, California. Authorities determined she had been raped and bludgeoned to death, leading to an investigation that spanned decades.
The lab was able to match the DNA to a man named Lewis Randolph “Randy” Williamson, who died in 2014. Williamson, a US Marine Corps veteran, called authorities on the fateful day to report finding Ms Gonzalez’s body. At the time, he claimed he could not identify whether the body was male or female. Described as “argumentative” by deputies, Williamson was asked to take a polygraph test, which he passed, clearing him of suspicion in the pre-DNA era. He had faced assault allegations in the past but was never convicted of any violent crimes, according to the Los Angeles Times.
Despite limited leads, the Riverside County cold case homicide team didn’t give up. A semen sample recovered from Ms Gonzalez’s body in 1979 was preserved but remained unmatched in the national Combined DNA Index System (CODIS) for decades.
In 2023, forensic technology finally caught up. The homicide team collaborated with a genetic lab in Texas that specialises in forensic genealogy. A sample of Williamson’s blood from his 2014 autopsy provided the DNA match needed to confirm him as the 17-year-old’s rapist and killer.
The Gonzalez family had mixed emotions—relief at finally having answers and sadness knowing Williamson would not face justice, as he died in Florida ten years ago. Ms Gonzalez, remembered by her family as a shy yet funny and mild-mannered young woman, was the fourth of seven children. Her oldest brother, Eddie Gonzalez, wrote on Facebook, “The Gonzalez family would like to thank the Riverside County Sheriff’s Department on a job well done. After 40 years, the Gonzalez family has closure.”
“We are very happy that we finally have closure,” Ms Gonzalez’s sister, Elizabeth, 64, shared with CNN. “We are happy about it but, since the guy has died, a little sad that he won’t spend any time for her murder.”
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