How Rain On Other Side Of The Planet Foreshadows California Heat

When heavy rain falls over the Indian Ocean and Southeast Asia and the eastern Pacific Ocean, it is a good indicator that temperatures in central California will reach 100°F in four to 16 days, according to new research.

Heat waves are common in California’s Central Valley, a 50-mile-wide oval of land that runs 450 miles from just north of Los Angeles up to Redding. The valley is home to half of the nation’s tree fruit and nut crops, as well as extensive dairy production, and heat waves can wreak havoc on agricultural production. The dairy industry had a heat wave-induced economic loss of about $1 billion in 2006, for instance. The ability to predict heat waves and understand what causes them could inform protective measures against damage.

“We want to know more about how extreme events are created,” says corresponding author Richard Grotjahn, professor in the land, air, and water resources department at the University of California, Davis.

“We know that such patterns in winter are sometimes linked with areas of the tropics where thunderstorms are enhanced. We wondered if there might be similar links during summer for those heat waves.”

The scientists analyzed the heat wave data from June through September from 1979 to 2010. Fifteen National Climatic Data Center stations located throughout the valley collected the data. From these data, the researchers identified 24 heat waves. They compared these instances to the phases of a large, traveling atmospheric circulation pattern called the Madden-Julian Oscillation, or MJO.

The MJO manifests as heavy rain that migrates across the tropical Indian and then Pacific oceans, and researchers have shown that it influences winter weather patterns.

“It’s well known that tropical rainfall, such as the MJO, has effects beyond the tropics,” says the paper’s first author Yun-Young Lee of the Asia-Pacific Economic Cooperation Climate Center in Busan, South Korea. “So a question comes to mind: Is hot weather in the Central California Valley partly attributable to tropical rainfall?”

Lee and Grotjahn found that, yes, enhanced rainfall in the tropics preceded each heat wave in specific and relatively predictable patterns. They also found that hot weather in the valley is most common after more intense MJO activity in the eastern Pacific Ocean, and next most common after strong MJO activity in the Indian Ocean.

“The more we know about such associations to large-scale weather patterns and remote links, the better we can assess climate model simulations and therefore better assess simulations of future climate scenarios,” Grotjahn says.

The National Science Foundation, the National Aeronautics and Space Administration, the Department of Energy Office of Science, the United States Department of Agriculture’s National Institute of Food and Agriculture, and the APEC Climate Center in the Republic of Korea funded the research.

The work appears in Advances in Atmospheric Sciences.

Source: UC Davis

Related Books

List Price: $12.99
Sale Price: $12.99 $9.72 You save: $3.27


List Price: $6.95
Sale Price: $6.95 $6.54 You save: $0.41


List Price: $16.99
Sale Price: $16.99 $14.29 You save: $2.70


enafarzh-CNzh-TWdanltlfifrdeiwhihuiditjakomsnofaplptruesswsvthtrukurvi

follow InnerSelf on

facebook-icontwitter-iconrss-icon

 Get The Latest By Email

{emailcloak=off}

LATEST VIDEOS

Fossil Fuel Production Plans Could Push Earth off a Climate Cliff
by The Real News Network
The United Nations is beginning its climate summit in Madrid.
Big Rail Spends More on Denying Climate Change than Big Oil
by The Real News Network
A new study concludes that rail is the industry that's injected the most money into climate change denial propaganda…
Did Scientists Get Climate Change Wrong?
by Sabine Hossenfelder
Interview with Prof Tim Palmer from the University of Oxford.
The New Normal: Climate Change Poses Challenges For Minnesota Farmers
by KMSP-TV Minneapolis-St. Paul
Spring brought a deluge of rain in southern Minnesota and it never seemed to stop.
Report: Today's Kids' Health Will Be Imperiled by Climate Change
by VOA News
An international report from researchers at 35 institutions says climate change will threaten the health and quality of…
How Supercharged Trash Gas Could Produce More Green Energy
by InnerSelf Staff
Synthetic compounds called “siloxanes” from everyday products like shampoo and motor oil are finding their way into…
300 Million Face Severe Risk of Climate-Fueled Coastal Flooding by 2050
by Democracy Now!
As a shocking new report finds that many coastal cities will be flooded by rising sea levels by 2050, Chile’s President…
Climate Warning: California Continues To Burn, Data Estimates Of Global Flooding
by MSNBC
Ben Strauss, CEO and Chief Scientist of Climate Central joins MTP Daily to discuss alarming new information about…

LATEST ARTICLES

Lessons From The Hockey Rink Could Help Ontario Tackle Climate Change
Lessons From The Hockey Rink Could Help Ontario Tackle Climate Change
by Jennifer Lynes and Dan Murray
The Auditor General of Ontario’s recent report found the province’s current climate change plan is not based on “sound…
Climate Change Threatens A Scary Number Of Plant Species
Climate Change Threatens A Scary Number Of Plant Species
by InnerSelf Staff
Almost 40% of global land plant species are very rare, and these species are most at risk for extinction as the climate…
How Drought Is Affecting Water Supply In Australia’s Capital Cities
How Drought Is Affecting Water Supply In Australia’s Capital Cities
by Ian Wright and Jason Reynolds
The level of water stored by Australia’s capital cities has steadily fallen over the last six years. They are now…
How Jet Stream Changes May Hit Global Breadbaskets
How Jet Stream Changes May Hit Global Breadbaskets
by Alex Kirby
Food shortages and civil disturbances may result from changes in the jet stream winds which circle the Earth,…
How To Design A Forest Fit To Heal The Planet
How To Design A Forest Fit To Heal The Planet
by Heather Plumpton
Reforestation has enormous potential as a cheap and natural way of sucking heat-absorbing carbon dioxide out of the…
Investors Fight Back Against Climate Wreckers
Investors Fight Back Against Climate Wreckers
by Paul Brown
Investors are using their shareholdings to force polluting companies to change their ways and cut carbon emissions.
Americans Are Worried About Climate Change, But Underestimate How Serious It Is
Americans Are Worried About Climate Change, But Underestimate How Serious It Is
by Bobby Duffy
The world is often better and getting better than people think. Murder rates, deaths from terrorism and extreme poverty…
How Climate, Not Conflict, Drove Many Syrian Refugees To Lebanon
How Climate, Not Conflict, Drove Many Syrian Refugees To Lebanon
by Hussein A. Amery
People who fled Syria in recent years are often viewed as war refugees because of the violence that has engulfed much…