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The Changing Himalayas
Figure 2: Spatial distribution of annual temperature trends in the greater Himalayan region for the period 1970–2000
(Data Source: New et al. 2002)
Table 4a: Regional mean maximum temperature trends in Nepal from 1977–2000 (°C per year)
Region Seasonal Annual
Winter (Dec-Feb) Pre-monsoon (Mar-May) Monsoon (Jun-Sep) Post-monsoon (Oct-Nov) (Jan-Dec)
Trans-Himalayas 0.12 0.01 0.11 0.1 0.09
Himalayas 0.09 0.05 0.06 0.08 0.06
Middle Mountains 0.06 0.05 0.06 0.09 0.08
Siwaliks 0.02 0.01 0.02 0.08 0.04
Terai 0.01 0 0.01 0.07 0.04
All Nepal 0.06 0.03 0.051 0.08 0.06
Source: updated from Shrestha et al. 1999
Table 4b: Average annual increase in temperature at different altitudes on the Tibetan Plateau
and surrounding areas 1961–1990 (°C per decade)
Altitude (m) No. of stations Spring Summer Autumn Winter Annual average
change
<500 34 -0.18 -0.07 0.08 0.16 0.00
500-1500 37 -0.11 -0.02 0.16 0.42 0.11
1500-2500 26 -0.17 0.03 0.15 0.46 0.12
2500-3500 38 -0.01 0.02 0.19 0.63 0.19
>3500 30 0.12 0.14 0.28 0.46 0.25
Source: Liu and Hou 1998
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