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The variability of surface air temperature extremes has been the focus of attention during the past several decades, and may exert a great influence on the global hydrologic cycle and energy balance through thermal forcing. Based on daily minimum temperature (TN) and maximum temperature (TX) observed by the China Meteorological Administration at 143 meteorological stations in the Yangtze River Basin (YRB), a suite of temperature indices recommended by the Expert Team on Climate Change Detection and Indices, with a primary focus on extreme events, were computed and analyzed for the period of 1960-2012 for this area. Some of the results are shown in Figure 1. Notes: TN10P-annual count of days when daily minimum temperature <10th percentile; TN90P-annual count of days when daily minimum temperature >90th percentile; TNn-annual minimum value of daily minimum temperature; FD-annual count of days where daily minimum temperature <0 °C; WSDI-annual count of days with at least 6 consecutive days when daily maximum temperature >90th percentile; CSDI-annual count of days with at least 6 consecutive days when daily minimum temperature <10th percentile.

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