Abstract
The present paper gives an overview of the key project “ South China Sea Monsoon Experiment (SCSMEX)” operated by the Ministry of Science and Technology of China during the period of 1996–2001. The SCSMEX is a joint atmospheric and oceanic field experiment which aims to better understand the onset, maintenance, and variability of the summer monsoon over the South China Sea (SCS). It is a large-scale international effort with many participating countries and regions cooperatively involved in this experiment. With the field observation in May–August 1998, a large amount of meteorological and oceanic data was acquired, which provides excellent datasets for the study of the SCS monsoon and the East Asian monsoon and their interaction with the ocean. The preliminary research achievements are as follows. (1) The earliest onset of the Asian monsoon over the SCS and Indo-China Peninsula has been well documented. From the viewpoint of the synoptic process, its onset is closely related to the early rapid development of a twin cyclone to the east of Sri Lanka. The conceptual model of the SCS monsoon onset in 1998 was put forward. The 50-year time series of the SCS monsoon onset date was also made. (2) Two major modes, namely the 30–60-day and 10–20-day oscillations were ascertained. The influences of the abnormal SCS monsoon on the precipitation over eastern China and its modes were identified. A strong (weak) monsoon over the SCS usually leads to less (more) precipitation over the middle and lower reaches of the Yangtze River basin, and more (less) precipitation in North China. (3) During the monsoon onset over the SCS, a wide variety of organized mesoscale convective systems (MCSs) were observed by a Doppler radar array deployed over the northern SCS. The relationship between large-scale circulations and MCSs during the monsoon onset process in 1998 was clearly revealed. It was suggested that there is a kind of positive feedback mechanism between large-scale circulations and MCSs. (4) The SST over the SCS during the early period influences the timing of the monsoon onset date and the monsoon’s intensity. During the monsoon onset, the ocean undergoes a process of energy release through air-sea interaction. During the break phase of the SCS monsoon, the ocean demonstrates the process of energy re-accumulation. Obvious differences in the air-sea turbulent flux exchange between the southern and northern parts of the SCS due to different characteristic features of the atmosphere and sea structure were observed in those regions. (5) The verification of impact of intensive observations on the predictive performance is made by the use of regional models. The air-sea coupled regional climate model (CRCM) was also developed under the SCSMEX Project. The simulation of the oceanic circulation in 1998 produced with the model was well compared with the observations.
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References
Ding, Y. H., 1992: Summer monsoon rainfall in China.J. Meteor. Soc. Japan,70, 373–396.
Ding, Y. H., 1994:Monsoons over China. Kluwer Academic Publishers, Dordrecht/Boston /London, 420pp.
Ding, Yihui, 2004: Seasonal March of the East Asian Summer Monsoon.The East Asian Monsoon, World Scientific, Singapore, 1–44.
Ding, Y. H., and M. Murakami (Eds.), 1994:The Asian Monsoon. China Meteorological Press, Beijing.
Ding Yihui, and Liu Yanju, 2001: Onset and the evolution of the summer monsoon over the South China Sea during the SCSMEX field experiment in 1998.J. Meteor. Soc. Japan,79(1B), 255–276.
Guo Qiyun, and Wang Zengqin, 1981: Analysis of precipitation during prevalence of the summer monsoon for recent thirty years.Acta Geographica Sinica,36, 187–195. (in Chinese)
He Jinhai, Ding Yihui, Gao Hui, and Xu Haimin, 2001:Determination of the Date of the South China Sea Summer Monsoon Onset and Monsoon Index. China Meteorological Press, Beijing, 123pp. (in Chinese)
Johnson, R. H., and P. E. Ciesielski, 2002: Charateristics of the 1998 summer monsoon onset over the northern South China Sea.J. Meteor. Soc. Japan,80, 561–578.
Lau, K-M., G.-J. Yang, and S. H. Shen, 1988: Seasonal and intraseasonal climatology of summer monsoon rainfall over East Asia.Mon. Wea. Rev.,116, 18–37.
Lau, K. M., and S. Yang, 1997: Climatology and interannual variability of the Southeast Asian summer monsoon.Adv. Atmos. Sci.,14, 141–162.
Lau, K-M., and H. Y. Weng, 2000: Remote forcing of summer time U. S. droughts and floods by the Asian monsoon.WCRP/GEWEX News,10(2), 5–6.
Li Chongyin, 2001: Activities of the summer monsoon over the South China Sea and its anomaly as well as influence.Research Prospect of the Environment and Resources in the South China Sea, Su Jilan, Ed., China Ocean Press, 150pp. (in Chinese)
Liu, Q. S., Y. Jia, P. Liu, Q. Wang, and P. C. Chu, 2001: Seasonal and intraseasonal thermocline variability in the Central South China Sea.Geophys. Res. Lett.,28, 4467–4470.
Liu Yiming, and Ding Yihui, 2003: Simulation of activity of the Asian summer monsoon and heavy rainfalls in China in 1998 with regional climate model.Acta Meteorologica Sinica,17(Suppl.), 273–288.
Matsumoto, J., 1997: Seasonal transition of summer rainy season over Indochinese and adjacent monsoon region.Adv. Atmos. Sci.,14, 231–245.
Mu Mingquan, and Li Chongyin, 2000: On the outbreak of South China Sea summer monsoon in 1998 and activities of atmospheric intraseasonal oscillation.Climatic and Environmental Research,5(4), 375–387. (in Chinese)
National Climate Center/ China Meteorological Administration, 1998:Heavy Flooding and Climate Anomalies in China in 1998. China Meteorological Press, Beijing, 193pp. (in Chinese)
Qu Shaohou, Hu Fei, Li Yaqiu, and Su Lin, 2000: Some characteristics of air-sea exchange for the SCS summer monsoon during the SCSMEX in 1998.Climatic and Environmental Research,5, 434–445. (in Chinese)
Ren Xuejuan, and Qian Yongfu, 2001: Development of a coupled regional air-sea model and its numerical simulation for summer monsoon in 1998.Acta Meteorologica Sinica,15, 385–396.
SCSMEX Project Office, 1995:Scientific Plan of the South China Sea Monsoon Experiment (SCSMEX) Published by SCSMEX Project Office, 42pp. (in Chinese)
SCSMEX Project Office, 1999:Booklet of the South China Sea Monsoon Experiment (SCSMEX). Published by SCSMEX Project Office, 40pp. (in Chinese)
SCSMEX Project Office, 2003:Summary of the SCSMEX Scientific Research Results. Published by SCSMEX Project Office, 127pp. (in Chinese)
Sun Ying, 2002: A study on anomalous activities of East Asian summer monsoon and the related physical mechanisms during 1999. Ph. D. Dissertation, National Climate Center of China, 221pp. (in Chinese)
Tanaka, M., 1994: The onset and retreat dates of the Austral summer monsoon over Indonesia, Australia and New Guinea.J. Meteor. Soc. Japan,72, 255–267.
Tanaka, M., 1997: Interannual and interdecadal variations of the Western North Pacific monsoon and Baiyu rainfall and their relationship to the ENSO cycles.J. Meteor. Soc. Japan,75, 1109–1113.
Tao, S. Y., and L. X. Chen, 1987: A review of recent research of the East Asian summer monsoon in China.Monsoon Meteorology, C. P. Chang and T. N. Krishnamurti, Eds, Oxford University Press, 60–92.
Wang, A. Y., and coauthors, 2001: Onset maintenance and retreat of Asian summer monsoon.Climatological AT- LAS for Asian Summer Monsoon, S. K. Fong, and A. Y. Wang, Eds., Macau Foundation, Macau, 251–318.
Wang Guihua, and Xu Jianping, 2001: Diagnostic analysis on upper circulations variation in South China Sea around onset of summer monsoon in 1998.Journal of Tropical Oceanography,20(1), 36–43. (in Chinese)
Wu, G. X., and Y. S. Zhang, 1998: Tibetan Plateau forcing and the timing of the monsoon onset over South Asia and the South China Sea.Mon. Wea. Rev.,126, 913–927.
Xu Guqiang, and Zhu Qiangen, 2002: Feature analysis of summer monsoon LFO over SCS in 1998.Journal of Tropical Meteorology,18, 309–316.
Yamazak, N., M. Tanaka., M. Marakami, and K. Sasamoto, 1999: Analysis on the large-scale convective activity and precipitation systems.Recent Progress in Studies of Asian Monsoon Mechanism, M. Murakami et al., Eds., 201–216.
Yan Junyue, Yao Huadong, Li Jianglong, Wang Qiang, and Yang Zhiyong, 2000: Characteristics of turbulence structure and flux transfer on the sea surface during the onset of SCS monsoon in 1998.Climatic and Environmental Research,5, 447–458. (in Chinese)
Yasunari, T., and Y. Seki, 1992: Role of the Asian monsoon on the interannual variability of the global climate system.J. Meteor. Soc. Japan,70, 177–189.
Yoshino, M. M., 1965: Four stages of rainy season in early summer over East Asia (Part I).J. Meteor. Soc. Japan,43, 231–245.
Zhang Qingrong, Du Yan, and Wang Dongxiao, 2001a: Shape features of warm water in South China Sea.Journal of Tropical Oceanography,20, 69–76. (in Chinese)
Zhang Xiuzhi, Li Jianglong, Ding Yihui, and Yan Junyue, 2001b: Research of circulation characteristics and index of South China Sea summer monsoon.Acta Meteorologica Sinica,15, 450–464.
Zhang Zhuqiang, C. L. J. Chan, and Y. H. Ding, 2004: Characteristics, evolution and mechanisms of the summer monsoon onset over Southeast Asia.Int. J. Climatol. (Accepted)
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Yihui, D., Chongyin, L. & Yanju, L. Overview of the South China sea monsoon experiment. Adv. Atmos. Sci. 21, 343–360 (2004). https://doi.org/10.1007/BF02915563
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DOI: https://doi.org/10.1007/BF02915563