Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

China monsoon rainfall prediction and Pacific surface-subsurface sea temperature anomalies

04.02.2009
The Monsoon and Environment Research Group of Peking University submitted a report to Chinese Science Bulletin, recently, showed that regional summer monsoon rainfall in China can be predicted by 1-2 seasons ahead by using the signals of the sea surface temperature anomaly (SSTA) and the subsurface temperature anomaly (STA) in the central equatorial Pacific (CEP). Several new facts have been revealed as follows.

(1) The strongest center of SSTA along the equatorial Pacific has migrated westward from the eastern equatorial Pacific (EEP, NINO3 region) to the CEP (NINO3.4 or NINO4 region) in the last half century. Regular inter-annual oscillations or variation frequency of SSTA in the equatorial Pacific are modulated by intensive La Niña events for about decadal interval.

The winter phase-lock feature for warming events is commonly found at different intervals but warming places are also modulated by intensive La Niña events. The positive SSTA along the equatorial zone results from exposing positive STA which appears about 3 months earlier than SSTA. This is a precursory signal for indicating the future warming or cooling event in the equatorial Pacific.

(2) The subtropical summer monsoon rainfall in China has had a long-term rising trend for the last two decades. The long-term increasing trend is still continued in the central China (Huaihe) region but a deducing trend has been observed since 1998 in southern regions. A typical biennial oscillation of summer rainfall anomaly has been found in central China and biennial oscillation of SSTA has also been observed in the CEP since the early 21st century.

(3) Since the beginning of the 21st century, three warm events in winter occurring in the CEP have been accompanied with more summer rainfall in central China and less summer rainfall in southern China. The warm SSTA indicated that the winter phase-lock SSTA had a determined relationship with the summer rainfall anomalies in central China and southern China respectively. This relationship shows that the more summer rainfall in central China follows the winter-spring warm water in the CEP while the more summer rainfall in southern China may follow the winter-spring cool water in recent years. A cold water event was observed in 2008 so that the more summer rainfall has been successfully predicted in southern China.

Reference: Qian Weihong, Zhu Jiang, Wang Yongguang, Fu Jiaolan. Regional relationship between the Jiang-Huai Meiyu and the equatorial surface-subsurface temperature anomalies. Chinese Science Bulletin, 2009,54(1): 113-119

Weihong Qian | EurekAlert!
Further information:
http://www.pku.edu.cn

More articles from Earth Sciences:

nachricht NASA finds newly formed tropical storm lan over open waters
17.10.2017 | NASA/Goddard Space Flight Center

nachricht The melting ice makes the sea around Greenland less saline
16.10.2017 | Aarhus University

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Ocean atmosphere rife with microbes

17.10.2017 | Life Sciences

Neutrons observe vitamin B6-dependent enzyme activity useful for drug development

17.10.2017 | Life Sciences

NASA finds newly formed tropical storm lan over open waters

17.10.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>