Fig. 2.6 Time-series of all India averaged annual frequency of a cold
nights (TN10p), b cold days (TX10p), c warm nights (TN90p), and
d warm days (TX90p); and annual intensity of e coldest night (TNn),
f coldest day (TXn), g warmest night (TNx) and h warmest day
(TXx) estimated from the IMD daily gridded maximum and minimum
surface air temperature datasets for the period from 1951 to 2015. The
dashed blue and red lines indicate the linear trends for the periods
1951–2015 and 1986–2015, respectively. The rates of changes during
these two periods are shown below the trend lines. The 90% confidence
intervals for these trend estimates are assessed in Tables 2.4 and 2.5
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