Trend and Abrupt Regime Shift of Temperature Extreme in Northeast China, 1957–2015

Figure 3

Presentation of regional time series for extremely cold temperature indices. (a) Cold night frequency (TN10p). (b) Annual minimum value of daily minimum temperature (TNn). (c) Annual minimum value of daily maximum temperature (TXn). (d) Frost days (FD). (e) Diurnal temperature range (DTR). The heavy bold solid black line is an annual smoothing mean.

(a)

(b)

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(e)