Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 
Datenbankrecherche:

 

Central Valley irrigation intensifies rainfall, storms across the Southwest

29.01.2013
UCI study finds that doubling of moisture in air has positive, negative effects
Agricultural irrigation in California’s Central Valley doubles the amount of water vapor pumped into the atmosphere, ratcheting up rainfall and powerful monsoons across the interior Southwest, according to a new study by UC Irvine scientists.

Moisture on the vast farm fields evaporates, is blown over the Sierra Nevada and dumps 15 percent more than average summer rain in numerous other states. Runoff to the Colorado River increases by 28 percent, and the Four Corners region experiences a 56 percent boost in runoff. While the additional water supply can be a good thing, the transport pattern also accelerates the severity of monsoons and other potentially destructive seasonal weather events.

“If we stop irrigating in the Valley, we’ll see a decrease in stream flow in the Colorado River basin,” said climate hydrologist Jay Famiglietti, senior author on the paper, which will be published online Tuesday, Jan. 29, in the journal Geophysical Research Letters. The basin provides water for about 35 million people, including those in Los Angeles, Las Vegas and Phoenix. But the extra water vapor also accelerates normal atmospheric circulation, he said, “firing up” the annual storm cycle and drawing in more water vapor from the Gulf of Mexico as well as the Central Valley.

When the additional waves of moisture bump into developing monsoons, Famiglietti said, “it’s like throwing fuel on a fire.”

Famiglietti, an Earth system science professor in the School of Physical Sciences, and colleague Min-Hui Lo, a postdoctoral researcher at the University of California Center for Hydrologic Modeling who is now at National Taiwan University, painstakingly entered regional irrigation levels into global rainfall and weather models and traced the patterns.

“All percent differences in the paper are the differences between applying irrigation to the Central Valley and not applying it,” Famiglietti said. “That’s the point of the study – and the beauty of using computer models. You can isolate the phenomenon that you wish to explore, in this case, irrigation versus no irrigation.”

Famiglietti’s team plans to increase the scope of the work to track how major human water usage elsewhere in the world affects neighboring areas too. A better understanding of irrigation’s impact on the changing climate and water availability could improve resource management in parched or flooded areas.

About the University of California, Irvine: Founded in 1965, UCI is a top-ranked university dedicated to research, scholarship and community service. Led by Chancellor Michael Drake since 2005, UCI is among the most dynamic campuses in the University of California system, with more than 28,000 undergraduate and graduate students, 1,100 faculty and 9,400 staff. Orange County’s second-largest employer, UCI contributes an annual economic impact of $4.3 billion. For more UCI news, visit news.uci.edu.

News Radio: UCI maintains on campus an ISDN line for conducting interviews with its faculty and experts. Use of this line is available for a fee to radio news programs/stations that wish to interview UCI faculty and experts. Use of the ISDN line is subject to availability and approval by the university.

Janet Wilson | EurekAlert!
Further information:
http://www.uci.edu

More articles from Earth Sciences:

nachricht Water - as the underlying driver of the Earth’s carbon cycle
17.01.2017 | Max-Planck-Institut für Biogeochemie

nachricht Modeling magma to find copper
13.01.2017 | Université de Genève

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Erforschung von Elementarteilchen in Materialien

Laseranregung von Semimetallen ermöglicht die Erzeugung neuartiger Quasiteilchen in Festkörpersystemen sowie ultraschnelle Schaltung zwischen verschiedenen Zuständen.

Die Untersuchung der Eigenschaften fundamentaler Teilchen in Festkörpersystemen ist ein vielversprechender Ansatz für die Quantenfeldtheorie. Quasiteilchen...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Mit solaren Gebäudehüllen Architektur gestalten

Solarthermie ist in der breiten Öffentlichkeit derzeit durch dunkelblaue, rechteckige Kollektoren auf Hausdächern besetzt. Für ästhetisch hochwertige Architektur werden Technologien benötigt, die dem Architekten mehr Gestaltungsspielraum für Niedrigst- und Plusenergiegebäude geben. Im Projekt »ArKol« entwickeln Forscher des Fraunhofer ISE gemeinsam mit Partnern aktuell zwei Fassadenkollektoren für solare Wärmeerzeugung, die ein hohes Maß an Designflexibilität erlauben: einen Streifenkollektor für opake sowie eine solarthermische Jalousie für transparente Fassadenanteile. Der aktuelle Stand der beiden Entwicklungen wird auf der BAU 2017 vorgestellt.

Im Projekt »ArKol – Entwicklung von architektonisch hoch integrierten Fassadekollektoren mit Heat Pipes« entwickelt das Fraunhofer ISE gemeinsam mit Partnern...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Alle Focus-News des Innovations-reports >>>

Anzeige

Anzeige

IHR
JOB & KARRIERE
SERVICE
im innovations-report
in Kooperation mit academics
Veranstaltungen

Bundesweiter Astronomietag am 25. März 2017

17.01.2017 | Veranstaltungen

Über intelligente IT-Systeme und große Datenberge

17.01.2017 | Veranstaltungen

Aquakulturen und Fangquoten – was hilft gegen Überfischung?

16.01.2017 | Veranstaltungen

 
VideoLinks
B2B-VideoLinks
Weitere VideoLinks >>>
Aktuelle Beiträge

Bundesweiter Astronomietag am 25. März 2017

17.01.2017 | Veranstaltungsnachrichten

Intelligente Haustechnik hört auf „LISTEN“

17.01.2017 | Architektur Bauwesen

Satellitengestützte Lasermesstechnik gegen den Klimawandel

17.01.2017 | Maschinenbau