Contact Information:

Media Contact

Yufang Jin
yujin@ucdavis.edu
530-219-4429

Twitter: ucdavisnews

http://www.ucdavis.edu




Kredyty mieszkaniowe Kredyty mieszkaniowe

Sprawdź aktualny ranking najlepszych kredytów mieszkaniowych w Polsce - atrakcyjne kredytowanie nieruchomości.

PRESS-NEWS.org - Press Release Distribution
FREE PRESS RELEASES DISTRIBUTION
RSS - Press News Release
Add Press Release

Southern California wildfires show split personalities

Santa Ana fires costlier in damages than summer fires; climate change to fan flames for region


2015-09-08
(Press-News.org) Wildfires have ravaged regions of Southern California at an increasing rate over the past few decades, and scientists from three University of California campuses and partner institutions are predicting that by mid-century, a lot more will go up in flames.

In research published today in the journal Environmental Research Letters, the scientists discuss the split-personality nature of Southern California wildfires. They describe two distinct wildfire regimes, those driven by offshore Santa Ana winds that kick up in the fall and non-Santa Ana fires that result primarily from hot, dry conditions in the summer.

SANTA ANA FIRES MORE DAMAGING The two fire regimes consume roughly the same amount of acreage and cost similar amounts to suppress. However, the Santa Ana fires, which tend to hit more developed areas such as the coastal areas of Los Angeles and San Diego, are roughly 10 times more economically damaging.

"The traditional one-size-fits-all fuel management strategy will not be effective in reducing fire risks and preventing large fires because factors such as fuel and weather vary for different fire regimes," said lead author Yufang Jin, assistant professor in the Department of Land, Air and Water Resources at UC Davis and a researcher at UC Irvine at the time of the study. "California and the western U.S. are expected to face increased fire risk from the current multi-year drought. Local meteorology, extreme climate events, and ecosystem processes must be explicitly considered to develop effective mitigation and adaptation strategies."

Compared to non-Santa Ana fires, Santa Ana fires: - Spread three times faster - Burned into urban areas with greater housing values - Were responsible for 80 percent of the $3.1 billion in economic losses occurring over the study period of 1990 to 2009.

The researchers relied on NASA's satellite data and decades' worth of fire records from the California Department of Forestry and Fire Protection (CAL FIRE) and the U.S. Forest Service.

CONTRASTING PERSONALITIES Stoked by dry desert air channeled through mountain passes and canyons, Santa Ana fires burn with more intensity, and they do their worst in a shorter period of time than summer fires. In a typical Santa Ana fire, half of the territory burned is consumed in the first day of the blaze. Examples of Santa Ana fires include the costly Cedar Fire in San Diego and dozens of others that burned in late October 2003.

Non-Santa Ana fires, by contrast, burn more slowly over more remote mountain areas. Non-Santa Ana fires, such as the Station Fire that scorched large portions of the San Gabriel Mountains in 2009, rely on hot temperatures and dried vegetation and woody debris that serves as a fuel source.

A QUESTION OF RESOURCES Both types of fires are costly and damaging, but the researchers see change on the horizon.

"Warming in the summertime will be a big factor in increasing the number and size of non-Santa Ana fires," said co-author Alex Hall, UCLA professor of atmospheric and oceanic studies. "Lower relative humidity during Santa Ana events resulting from climate change toward the middle of the century will lead to larger Santa Ana fires."

Fire-prone regions also face increased competition during the summer for firefighting resources, such as air tankers, vehicles, and personnel.

"The large economic and human impacts of Santa Ana fires raises the question of whether more resources during the fall could be marshaled for suppressing these fires," said James Randerson, Chancellor's Professor of Earth system science at UCI and senior author on the paper.

INFORMATION:

The study was funded by NASA and the Jenkins Family Foundation.

Read the study at http://iopscience.iop.org/article/10.1088/1748-9326/10/9/094005/meta.


ELSE PRESS RELEASES FROM THIS DATE:

Southern California wildfires exhibit split personalities

2015-09-08
Irvine, Calif., Sept. 8, 2015 - Wildfires have ravaged both populated and unpopulated regions of Southern California at an increasing rate over the past few decades, and scientists from three University of California campuses and partner institutions are predicting that by midcentury, as a consequence of climate change causing hotter and drier summers, a lot more will go up in flames. In a paper published today in the journal Environmental Research Letters, the scientists discuss the split-personality nature of Southern California wildfires. They describe two distinct ...

Freebies won't bribe most bloggers into positive reviews

2015-09-08
Bloggers may accept compensation and free products for reviews, but freebies do not necessarily lead to positive endorsements, according to a group of researchers. In a study, most technology bloggers who have accepted compensation, including free products, for reviews actually reported that they feel more empowered in their relationships with companies that pitched them products, rather than feeling indebted to them. "We were concerned with how accepting compensation or products impacted how control mutuality -- where both groups feel that they are winning from the ...

Artificial 'plants' could fuel the future

2015-09-08
Imagine creating artificial plants that make gasoline and natural gas using only sunlight. And imagine using those fuels to heat our homes or run our cars without adding any greenhouse gases to the atmosphere. By combining nanoscience and biology, researchers led by scientists at University of California, Berkeley, have taken a big step in that direction. Peidong Yang, a professor of chemistry at Berkeley and co-director of the school's Kavli Energy NanoSciences Institute, leads a team that has created an artificial leaf that produces methane, the primary component of ...

Shouldering the burden of evolution

2015-09-08
As early humans increasingly left forests and utilized tools, they took an evolutionary step away from apes. But what this last common ancestor with apes looked like has remained unclear. A new study led by researchers at UC San Francisco shows that important clues lie in the shoulder. Humans split from our closest African ape relatives in the genus Pan - including chimpanzees and bonobos - 6 to 7 million years ago. Yet certain human traits resemble the more distantly related orangutan or even monkeys. This combination of characteristics calls into question whether the ...

Ozone can reduce a flower's scent that's critical for attracting pollinators

2015-09-08
New research shows that high levels of ozone, which are predicted to increase in the atmosphere in the future, can dampen the scents of flowers that attract bees and other pollinators. High ozone concentrations in ambient air caused fast degradation of the scent emitted from Brassica nigra flowers, reducing the range over which flowers could be identified by pollinators. Behavioral tests conducted with the buff-tailed bumblebee confirmed that ozone concentrations commonly occurring near large urban areas can strongly inhibit pollinators' attraction to flowers. ?"The ...

Drugs behave as predicted in computer model of key protein, enabling cancer drug discovery

Drugs behave as predicted in computer model of key protein, enabling cancer drug discovery
2015-09-08
Drugs important in the battle against cancer responded the way they do in real life and behaved according to predictions when tested in a computer-generated model of one of the cell's key molecular pumps -- the protein P-glycoprotein, or P-gp. Biologists at Southern Methodist University, Dallas, developed the computer generated model to overcome the problem of relying on only static images for the structure of P-gp, said biologist John G. Wise, lead author on the journal article announcing the advancement. The new SMU model allows researchers to dock nearly any drug ...

As demand for African timber soars, birds pay the ultimate price

As demand for African timber soars, birds pay the ultimate price
2015-09-08
Tropical forests are home to more of the world's terrestrial biodiversity than any other habitat, but are increasingly threatened by the impact of human activities. Illegal logging, in particular, poses a severe and increasing threat to tropical forests worldwide. But, until now, its impact on tropical wildlife has not been quantified. A new study co-authored by scientists at Drexel University, published in the most recent issue of Biological Conservation, reveals the devastating impact of illegal logging on bird communities in the understory layer of Ghana's Upper Guinea ...

Arthritis may be a major driver of poverty

2015-09-08
Developing arthritis increases the risk of falling into poverty, especially for women, new research shows. In a study of more than 4,000 Australian adults, females who developed arthritis were 51% more likely to fall into income poverty than nonarthritic women. In men, arthritis was linked with a 22% increased risk. Also, women with arthritis were 87% more likely to fall into "multidimensional poverty," which includes income, health, and education attainment, while the arthritis-related risk in men was 29%. The investigators noted that given the high prevalence of ...

New findings shed light on fundamental process of DNA repair

2015-09-08
Inside the trillions of cells that make up the human body, things are rarely silent. Molecules are constantly being made, moved, and modified--and during these processes, mistakes are sometimes made. Strands of DNA, for instance, can break for any number of reasons, such as exposure to UV radiation, or mechanical stress on the chromosomes into which our genetic material is packaged. To make sure cells stay alive and multiply properly, the body relies on a number of mechanisms to fix such damage. Although researchers have been studying DNA repair for decades, much remains ...

Advanced treatment and prognosis data available for TNM classification

2015-09-08
DENVER, Colo. - The publication of the Eighth Edition of the Tumor, Node and Metastasis (TNM) Classification of Lung Cancer will provide physicians around the world access to new data to more precisely stage and treat cases of lung cancer. That data, collected by the International Association for the Study of Lung Cancer (IASLC) Staging and Prognostic Factors Committee and presented at the 16th World Conference on Lung Cancer (WCLC) in Denver on Tuesday, Sept. 8, 2015 at the Colorado Convention Center, will be published in 2016. In 1998, IASLC established its Lung Cancer ...

LAST 30 PRESS RELEASES:

How your brain decides blame and punishment -- and how it can be changed

Uniquely human brain region enables punishment decisions

Pinpointing punishment

Chapman University publishes research on attractiveness and mating

E-cigarettes: Special issue from Nicotine & Tobacco Research

Placental problems in early pregnancy associated with 5-fold increased risk of OB & fetal disorders

UT study: Invasive brood parasites a threat to native bird species

Criminals acquire guns through social connections

Restoring ocean health

Report: Cancer remains leading cause of death in US Hispanics

Twin study suggests genetic factors contribute to insomnia in adults

To be fragrant or not: Why do some male hairstreak butterflies lack scent organs?

International team discovers natural defense against HIV

Bolivian biodiversity observatory takes its first steps

Choice of college major influences lifetime earnings more than simply getting a degree

Dominant strain of drug-resistant MRSA decreases in hospitals, but persists in community

Synthetic biology needs robust safety mechanisms before real world application

US defense agencies increase investment in federal synthetic biology research

Robots help to map England's only deep-water Marine Conservation Zone

Mayo researchers identify protein -- may predict who will respond to PD-1 immunotherapy for melanoma

How much water do US fracking operations really use?

New approach to mammograms could improve reliability

The influence of citizen science grows despite some resistance

Unlocking secrets of how fossils form

What happens on the molecular level when smog gets into the lungs?

Using ultrasound to clean medical instruments

Platinum and iron oxide working together get the job done

Tiny silica particles could be used to repair damaged teeth, research shows

A quantum lab for everyone

No way? Charity's logo may influence perception of food in package

[Press-News.org] Southern California wildfires show split personalities
Santa Ana fires costlier in damages than summer fires; climate change to fan flames for region
Press-News.org is a service of DragonFly Company. All Rights Reserved.
Issuers of news releases are solely responsible for the accuracy of their content.