Abstract
It is indicated in this paper that there were substantial differences of interannual variability (IIV) in summer rainfall over South China (RSC) among 1960–1977, 1978–1988, and 1989–2010. Notably, both IIV and mean RSC have significantly increased after 1992/1993. Relative to 1978–1988, the percentage increase of standard deviation (SD) of RSC is 230.32 % for 1993–2010. It indicates remarkable increase in IIV of RSC occurred 1993–2010, concurrent with rainfall increase. The results show that the mid-tropospheric meridional gradient of temperature over East Asia weakened in the later period, resulting in an anomalous cyclonic circulation, transporting more tropospheric moisture to South China and an upward motion at the middle and low levels of the troposphere. Meanwhile, IIV in the mid-tropospheric meridional gradient of temperature over East Asia resulted in IIVs both in the anomalous cyclonic circulation and in vertically integrated moisture content over South China. This scenario led to a significant increase in the IIV of summer rainfall over South China. Compared to 1978–1988, a greater increase in the IIV of warming over Mongolia–northeastern China and of excessive spring snow depth over the southeastern Tibetan Plateau were responsible for the increase in the IIV of the mid-tropospheric meridional gradient of the East Asian temperature during 1993–2010. Moreover, another slight increase in the IIV of summer rainfall over South China occurred in 1960–1977 relative to 1978–1988, which partly resulted from the weakening East Asian summer monsoon variability in the late 1970s.
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References
Armstrong RL, Brodzik MJ, Knowles K et al (2005) Global monthly EASE-Grid snow water equivalent climatology. National Snow and Ice Data Center, Boulder
Cheng YJ, Lohmann U, Zhang JH et al (2005) Contribution of changes in sea surface temperature and Aerosol loading to the decreasing precipitation trend in Southern China. J Clim 18:1381–1390
Ding YH, Wang ZY, Sun Y (2008) Inter-decadal variation of the summer precipitation in East China and its associated with decreasing Asian summer monsoon. Part I: observed evidences. Int J Climatol 28:1138–1161
Ding YH, Sun Y, Wang ZY et al (2009) Inter-decadal variation of the summer precipitation in China and its association with decreasing Asian summer monsoon Part II: possible causes. Int J Climatol 29(13):1926–1944. doi:10.1002/joc.1759
Gong DY, Ho CH (2002) Shift in the summer rainfall over the Yangtze River Valley in the late 1970s. Geophys Res Lett 29:1436. doi:0.1029/2001GL014523
Huang RH, Xu YH, Zhou LT (1999) The interdecadal variation of summer precipitations in China and the drought trend in North China. Plateau Meteorol 18(4):465–476 (in Chinese)
Kwon MH, Jhun JG, Ha KJ (2007) Decadal change in east Asian summer monsoon circulation in the mid-1990s. Geophys Res Lett 34:L21706. doi:10.1029/2007GL031977
Lei YH, Hoskins B, Slingo J (2011) Exploring the interplay between natural decadal variability and anthropogenic climate change in summer rainfall over China. Part I: observational evidence. J Clim 24:4584–4599
Lepage Y (1971) A combination of Wilcoxon’s and Ansari-Bradley’s statistics. Biometrika 58(1):213–217
Lu RY, Fu YH (2010) Intensification of East Asian summer rainfall interannual variability in the twenty-first century simulated by 12 CMIP3 coupled models. J Clim 23:3316–3331. doi:10.1175/2009JCLI3130.1
Lu RY, Ye H, Jhun JG (2011) Weakening of interannual variability in the summer East Asian upper-tropospheric westerly jet since the Mid-1990s. Adv Atmos Sci 28(6):1246–1256
Nitta T, Hu ZZ (1996) Summer climate variability in China and its associated with 500 hPa height and tropical convection. J Meteorol Soc Jpn 74(4):425–455
Wang HJ (2001) The weakening of the Asian monsoon circulation after the end of 1970’s. Adv Atmos Sci 18:376–386
Weng HY, Lau KM, Xue YK (1999) Multi-scale summer rainfall variability over China and its long-term link to global sea surface temperature variability. J Meteorol Soc Jpn 77(4):845–857
Wu BY, Yang K, Zhang RH (2009) Eurasian snow cover variability and its association with summer rainfall in China. Adv Atmos Sci 26(1):31–44
Wu RG, Wen ZP, Song Y, Li YQ (2010) An interdecadal changes in southern China summer rainfall around 1992/93. J Clim 23:2389–2403
Yang FL, Lau KM (2004) Trend and variability of China precipitation in spring and summer: linkage to sea-surface temperatures. Int J Climatol 24:1625–1644
Yao C, Yang S, Qian WH et al (2008) Regional summer precipitation events on Asian and their changes in the past decades. J Geophys Res 113:D17107. doi:10.1029/2007JD009603
Yu RC, Wang B, Zhou TJ (2004) Tropospheric cooling and summer monsoon weakening trend over East Asia. Geophys Res Lett 31:L22212. doi:10.1029/2004GL021270
Zhang YS, Li T, Wang B (2004) Decadal change of the spring snow depth over the Tibetan Plateau: the associated circulation and influence on the east Asian summer monsoon. J Clim 17(14):2780–2793
Zhang RH, Wu BY, Zhao P et al (2008) The decadal shift of the summer climate in the late 1980s over Eastern China and its possible causes. Act Meteor Sin 22(4):435–445
Zhao P, Yang S, Yu RC (2010) Long-term changes in rainfall over eastern China and large-scale atmospheric circulation associated with recent global warming. J Clim 23:1544–1562. doi:10.1175/2009JCLI2660.1
Zhou TJ, Yu RC (2005) Atmospheric water vapor transport associated with typical anomalous summer rainfall pattern in China. J Geophys Res 110:D08104. doi:10.1029/2004JD005413
Zhu CW, Wang B, Qian WH et al (2012) Recent weakening of northern East Asian summer monsoon: a possible response to global warming. Geophys Res Lett 39:L09701. doi:10.1029/2012GL051155
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The authors thank the reviewers for their valuable comments that helped improve our work. This work was supported by National Funds for Distinguished Young Scientists of China (Grant No. 41325018) and National Nature Science Foundation of China (Grant No. 41175071) and Strategic Technological Program of the Chinese Academy of Sciences (Grant No. XDA05090426), in addition to the National Basic Research Program of China (Grant No. 2010CB950304).
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Fan, K., Xu, Z. & Tian, B. Has the intensity of the interannual variability in summer rainfall over South China remarkably increased?. Meteorol Atmos Phys 124, 23–32 (2014). https://doi.org/10.1007/s00703-013-0301-5
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DOI: https://doi.org/10.1007/s00703-013-0301-5