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 New Study Will Help Find the Best Locations for Thermal Power Stations in Iceland
19.01.2017 | University of Gothenburg

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

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Quantum optical sensor for the first time tested in space – with a laser system from Berlin

For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.

According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

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: 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...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

New technology for mass-production of complex molded composite components

23.01.2017 | Process Engineering

Quantum optical sensor for the first time tested in space – with a laser system from Berlin

23.01.2017 | Physics and Astronomy

The interactome of infected neural cells reveals new therapeutic targets for Zika

23.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>