The research of detecting abrupt climate change with approximate entropy;

Scientists have applied kinds of climate models to perform case simulation and mechanism experiment, but a reasonable explanation about the mechanisms of abrupt climate change in Holocene is still.

Climate system is nonlinear,non-stationary and hierarchical,which makes even harder to detect and analyze abrupt climate changes.

The climate jumps in the plain were examined by accumulated departure, J_y parameter and .

2 m in Lhasa from 1961 to 2005,the linear trend,climatic anomalous and climate abrupt of deep soil temperature during recent 45 years are analyzed by using of linear trend analysis,accumulated variance and signal noise ratio methods.

The climate abrupt change in the last 95 years are verealed by the method of the signal/noise ratio.

Paleoclimatic sequences from the ice core,marine sediments and terrestrial records indicate the serial abrupt climatic changes on centennial-millennial scales during the Holocene,which further confirms the instabilities of climatic system in the background of glacial-interglacial cycles.

The study indicates that the west Edge of loess plateau write down the typical abrupt climatic changes since the Last interglacial: Heinrich events(29,23,16.