Abstract
An extreme rainstorm hit southern China during 13–17 December 2013, with a record-breaking daily rainfall rate, large spatial extent, and unusually long persistence. We examined what induced this heavy rainfall process, based on observed rainfall data and NCEP-NCAR reanalysis data through composite and diagnostic methods. The results showed that a Rossby waveguide within the subtropical westerly jet caused the event. The Rossby wave originated from strong cold air intrusion into the subtropical westerly jet over the eastern Mediterranean. With the enhancement and northward shift of the Middle East westerly jet, the Rossby wave propagated slowly eastward and deepened the India-Burma trough, which transported a large amount of moisture from the Bay of Bengal and South China Sea to southern China. Strong divergence in the upper troposphere, caused by the enhancement of the East Asian westerly jet, also favored the heavy rainfall process over Southeast China. In addition, the Rossby wave was associated with a negative-to-positive phase shift and enhancement of the North Atlantic Oscillation, but convergence in the eastern Mediterranean played the key role in the eastward propagation of the Rossby wave within the subtropical westerly jet.
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References
Branstator, G., 2002: Circumglobal teleconnections, the jet stream waveguide, and the North Atlantic Oscillation. J. Climate, 15, 1893–1910.
Chen, H.-S., L. Liu, and Y.-J. Zhu, 2013: Possible linkage between winter extreme low temperature events over China and synoptic-scale transient wave activity. Sci. China Ser. (D), 56, 1266–1280.
Feldstein, S. B., and U. Dayan, 2008: Circumglobal teleconnections and wave packets associated with Israeli winter precipitation. Quart. J. Roy. Meteor. Soc., 134, 455–467.
Gong, D.-Y., Y.-Q. Gao, D. Guo, R. Mao, J. Yang, M. Hu, and M.-N. Gao, 2013: Interannual linkage between Arctic/North Atlantic Oscillation and tropical Indian Ocean precipitation during boreal winter. Climate Dyn., 42, 1007–1027, doi: 10.1007/s00382-013-1681-4.
Kalnay, E., and Coauthors, 1996: The NCEP/NCAR 40-year reanalysis project. Bull. Amer. Meteor. Soc., 77, 437–471.
Li, C.-Y., 1988: Frequent activity of East Asian trough and El Nino onset. Sci. China Ser. (B), 31, 667–674. (in Chinese)
Li, J., C. Sun, and F.-F. Jin, 2013: NAO implicated as a predictor of Northern Hemisphere mean temperature multidecadal variability. Geophys. Res. Lett., 40, 5497–5502.
Luo, D., 2005: A barotropic envelope Rossby soliton model for block-eddy interaction. Part II: Role of westward-traveling planetary waves. J. Atmos. Sci., 62, 22–40.
Ni, D.-H., Z.-B. Sun, Z.-X. Li, G. Zeng, and W.-T. Deng, 2010: Relation of Middle East jet stream and China climate anomaly in winter. Scientia Meteorologica Sinica, 30, 301–307. (in Chinese)
Plumb, R. A., 1985: On the three-dimensional propagation of stationary waves. J. Atmos. Sci., 42, 217–229.
Sardeshmukh, P. D., and B. J. Hoskins, 1988: The generation of global rotational flow by steady idealized tropical divergence. J. Atmos. Sci., 45, 1228–1251.
Suo, M.-Q., and Y.-H. Ding, 2009: The structures and evolutions of the wintertime southern branch trough in the subtropical westerlies. Chinese J. Atmos. Sci., 33, 425–442. (in Chinese)
Suo, M.-Q., Y.-H. Ding, and Z.-Y. Wang, 2008: Relationship between Rossby wave propagation in southern branch of westerlies and the formation of the southern branch trough in wintertime. J. Appl. Meteor. Sci., 19, 731–740. (in Chinese)
Syed, F. S., F. Giorgi, J. S. Pal, and M. P. King, 2006: Effect of remote forcings on the winter precipitation of central southwest Asia Part 1: Observations. Theor. Appl. Climatol., 86, 147–160.
Watanabe, M., 2004: Asian jet waveguide and a downstream extension of the North Atlantic Oscillation. J. Climate, 17, 4674–4691.
Wen, M., S. Yang, A. Kumar, and P.-Q. Zhang, 2009: An analysis of the Large-Scale climate anomalies associated with the snowstorms affecting China in January 2008. Mon. Wea. Rev., 137, 1111–1131.
Yang, S., K.-M. Lau, S.-H. Yoo, J. L. Kinter, K. Miyakoda, and C.-H. Ho, 2004: Upstream subtropical signals preceding the Asian summer monsoon circulation. J. Climate, 17, 4213–4229.
Zhou, B.-T., 2013: Weakening of winter North Atlantic Oscillation signal in spring precipitation over southern China. Atmos. Oceanic Sci. Lett., 6, 248–252.
Zhou, W., J. C. L. Chan, W. Chen, J. Ling, J. G. Pinto and Y.-P. Shao, 2009: Synoptic-scale controls of persistent low temperature and icy weather over southern China in January 2008. Mon. Wea. Rev., 137, 3978–3991.
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Li, C., Sun, J. Role of the subtropical westerly jet waveguide in a southern China heavy rainstorm in December 2013. Adv. Atmos. Sci. 32, 601–612 (2015). https://doi.org/10.1007/s00376-014-4099-y
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DOI: https://doi.org/10.1007/s00376-014-4099-y