Advertisement

Advances in Atmospheric Sciences

, Volume 18, Issue 5, pp 659–673 | Cite as

EA WM-Related Air-Sea-Land Interaction and the Asian Summer Monsoon Circulation

  • Bueh Cholaw
  • Ji Liren
  • Sun Shuqing
  • Cui Maochang
Article

Abstract

Based on the data analysis, this study further explores the characteristics of East Asian winter monsoon (hereafter, EA WM, for brevity) as well as the related air-sea-land system, and illustrates how and to what degree anomalous signals of the subsequent Asian summer monsoon are rooted in the preceding EA WM activity. We identified an important air-sea coupled mode, i.e., the EA WM mode illustrated in Section 3. In cold seasons, strong EA WM-related air-sea two-way interaction is responsible for the development and persistence of the SSTA pattern of EA WM mode. As a consequence, the key regions, i.e., the western Pacific and South China Sea (hereafter, SCS, for brevity), are dominated by such an SSTA pattern from the winter to the following summer. In the strong EA WM years, the deficient snow cover dominates eastern Tibetan Plateau in winter, and in spring, this anomaly pattern is further strengthened and extended to the northwestern side of Tibetan Plateau. Thus, the combined effect of strong EA WM-related SSTA and Tibetan snow cover constitutes an important factor in modulating the Asian monsoon circulation. The active role of the EA WM activity as well as the related air-sea-land interaction would, in the subsequent seasons, lead to: 1) the enhancement of SCS monsoon and related stronger rainfall; 2) the northward displacement of subtropical high during Meiyu period and the related deficient rainfall over Meiyu rainband; 3) above-normal precipitation over the regions from northern Japan to northeastern China in summer; 4) more rainfall over the Arabian Sea and Northeast India, while less rainfall over southwest India and the Bay of Bengal. The strong EA WM-related air-sea interaction shows, to some degree, precursory signals to the following Asian summer monsoon. However, the mechanism for the variability of Indian summer monsoon subsequent to the strong EA WM years remains uncertain.

Key words

EA WM Air-sea-land interaction Interannual variability Asian summer monsoon 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bretherton, C. S., C. Smith, and J. M. Wallace, 1992: An intercomparison of method for finding coupled patterns in climate data. J. Climate, 5, 354–369.CrossRefGoogle Scholar
  2. Bueh Cholaw and Ji Liren, 1999: The ocean-atmosphere coupled regimes and East Asian winter monsoon (EA WM) activity. Advances in Atmospheric Sciences, 16(1), 91–106.CrossRefGoogle Scholar
  3. Bueh Cholaw and Ji Liren, 1999: Anomalous activity of East Asian winter monsoon and the tropical Pacific SSTA. Chinese Science Bulletin, 44(10), 890–898.CrossRefGoogle Scholar
  4. Chen Lieting and Wu Renguang, 1998: Interannual and decadal variations of snow cover over Qinghai-Xizang Plateau and their relationships to summer monsoon rainfall in China. East Asian Monsoon and Torrential Rain in China, China Meteorological Press, 230–239.Google Scholar
  5. Horel, J.D., and J.M. Wallace, 1981: Planetary scale atmospheric phenomena associated with the Southern Oscillation. Mon. Wea. Rev., 109, 813–829.CrossRefGoogle Scholar
  6. Huang, Ronghui, and Sun Fengying, 1992: Impacts of the tropical western Pacific on the East Asian summer monsoon. J. Meteor. Soc. Japan, 70(1B), 243–256.CrossRefGoogle Scholar
  7. Ji Liren, Sun Shuqing, Klaus Arpe, and Lennart Bengtsson, 1997: Model study of the interannual variability of Asian winter monsoon and its influences. Advances in Atmospheric Sciences, 14(1), 1–22.CrossRefGoogle Scholar
  8. Latif, M., A. Sterl, M. Assenbaum, M. M. Junge, and E. Maier-Reimer, 1994: Climate variability in a coupled GCM. Part II: The Indian Ocean and monsoon. J. Climate, 7, 1449–1462.CrossRefGoogle Scholar
  9. Lau, N.-C., and M.J. Nath, 1990: A general circulation model study of the atmospheric response to equatorial SST anomalies observed in 1950–79. J. Climate, 3, 965–989.CrossRefGoogle Scholar
  10. Li Chongyin, Chen Yuxiang, and Yuan Chongguang, 1988: An important causative factor of El Niiio event -frequent activities of the strong cold waves in eastern Asia. Scientia Atmospherica Sinica (Special issue), 125–132 (in Chinese)Google Scholar
  11. Sun Shuqing, and Chen Jun, 2000: Influences of Anomalous East Asian Winter Monsoon on the Wind and Thermal fields of the South China Sea Monsoon. Climate and Environmental Research, 5(4), 400–417 (in Chinese).Google Scholar
  12. VanLoon, and R. A. Madden, 1981: The Southern Oscillation. Part I: Global associations with pressure and temperature in Northern winter. Mon. Wea. Rev., 109, 1150–1162.CrossRefGoogle Scholar
  13. Wallace, J.M., and D.S. Gutzler, 1981: Teleconnections in the geopotential height field during the Northern Hemisphere winter. Mon. Wea. Rev., 109, 784–812.CrossRefGoogle Scholar
  14. Wallace, J. M., C. Smith, and C. S. Bretherton, 1992: Singular value decomposition of wintertime sea surface temperature and 500-mb height anomalies. J. Climate, 5, 561–576.CrossRefGoogle Scholar
  15. Wu Guoxiong and Zhang Yongsheng, 1998: Tibetan Plateau forcing and monsoon onset in South Asia and southern China sea. Mon. Wea. Rev., 126(4), 913–927.CrossRefGoogle Scholar
  16. Yang, S., and K. -M. Lau., 1998: Influences of sea surface temperature and ground wetness on Asian summer monsoon. J. Climate, 11, 3230–3246.CrossRefGoogle Scholar
  17. Yasunari, T., A. Kitoh, and T. Tokioka, 1991: Local and remote responses to excessive snow mass over Eurasia appearing in the northern spring and summer climate -A study with the MRI GCM. J. Meteor. Soc. Japan, 69, 473–487.CrossRefGoogle Scholar
  18. Yeh, T. C., R. T. Wetherald, and S. Manabe, 1984: The effect of soil moisture on the short-term climate change and hydrology change -A numerical experiment. Mon. Wea. Rev., 112, 474–490.CrossRefGoogle Scholar

Copyright information

© Advances in Atmospheric Sciences 2001

Authors and Affiliations

  • Bueh Cholaw
    • 1
  • Ji Liren
    • 1
  • Sun Shuqing
    • 1
  • Cui Maochang
    • 2
  1. 1.LASG, Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina
  2. 2.Institute of OceanologyChinese Academy of SciencesQingdaoChina

Personalised recommendations