Climate of the Past Discussions www.clim-past-discuss.net 1814-9340 1814-9359 4 5 2008 10.5194/cpd-4-1047-2008 http://www.clim-past-discuss.net/4/1047/2008/ http://www.clim-past-discuss.net/4/1047/2008/cpd-4-1047-2008.html http://www.clim-past-discuss.net/4/1047/2008/cpd-4-1047-2008.pdf 1047 1060 2008-10-01 A nonlinear method for detecting climate mutation: a case study for summer climate change in China S. Q. Wan wan_sq@163.com G. L. Feng L. Wang C. H. Gu Y. L. Hu G. H. Zhou Yangzhou Meteorological Office, Yangzhou 225009, China LCS, China Meteorological Administration, Beijing 100081, China Department of Atmospheric Science, Lanzhou Universtiy, Lanzhou 730000, China In this paper, we explored the dynamical mechanism of anomalous summer climate late 1970s in China applying a new method, i.e., a dynamics index-Q based on phase-space reconstruction. 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