Comparison of Relationship Between the Concentrations of Water Isotopes in Precipitation in the Cities of Tehran (Iran) and New Delhi (India) - Management of Natural Resources in a Changing Environment - page 30

Table 1 The time-series variation of the ʴ 18 O, ʴD and deuterium excess (‰) values of precipitation with the observed monthly amount of precipitation (mm)
and temperature (°C) (IAEA/WMO 2012 )

Tehran: N:51.32°, E:35.68°, 1,200 m amsl New Delhi: N:28.58°, E:77.22°, 212 m amsl

Sample date ʴD ʴ 18 O D-excess Precip. Temp. ʴD ʴ 18 O D-excess Precip. Temp.

Nov 1961 22.3 2.1 5.5 1 11.1 −45.9 −7.1 10.9 1 18.7

Dec 1961 −11.8 −4.3 22.6 19 7.8 −45.9 −6 2.1 9 12.8

Jan 1962 −26.1 −6.1 22.7 14 4.4 −16.2 −3.9 15 33 12.9

Feb 1962 −31 −5.7 14.6 108 7.2 15 1.6 2.2 13 17.7

Mar 1962 −12.4 −3.9 18.8 5 13.1 20.5 1.6 7.7 8 22.4

Sep 1962 −52.1 −7 3.9 2 23.1 −75.6 −11.5 16.4 183 28.3

Nov 1962 −11.8 −2 4.2 5 9.7 −76.9 −10.9 10.3 2 20

Dec 1962 −36.6 −4.6 0.2 15 6.7 12.5 2.9 −10.7 25 14.8

Feb 1963 −23 −3.6 5.8 12 8.5 13.1 3.9 −18.1 12 18.5

Jun 1963 −10 −1.8 4.4 1 27.1 27.3 6.2 −22.3 118 33.1

Aug 1963 −13 −2.4 6.2 12 29.1 −49.6 −7.7 12 298 28.9

Sep 1963 −2.5 −1.5 9.5 1 25.6 −120 −15.3 2.4 278 28.1

Nov 1963 −16.8 −2.6 4 19 11 −109 −14.2 4.6 1 21.7

Dec 1963 −53.3 −9.6 23.5 63 2.9 −19.2 −1.4 −8 27 15.2

Feb 1964 −85.5 −12.2 12.1 33 4.9 −9.4 −0.2 −7.8 1 16.7

Mar 1964 −39.7 −6.6 13.1 10 12.2 −8.7 0.4 −11.9 1 24.1

Apr 1964 −40.3 −5.4 2.9 17 13.9 −30.2 −3.6 −1.4 5 29.5

Dec 1964 −99 −14.5 17 25 1.9 −36 −4.3 −1.6 16 15.2

Jan 1965 −74.4 −11.2 15.2 117 0.2 38.5 4.8 0.1 9 15.6

Feb 1965 −18.6 −4.2 15 8 3.3 55.8 5.8 9.4 9 16.7

Apr 1965 21.8 3.3 −4.6 16 14.8 17.4 2.4 −1.8 14 26.3

May 1965 19.9 3.1 −4.9 7 25.6 19.3 3.6 −9.5 6 31.3

Jun 1965 22.4 4.2 −11.2 1 27.1 46.6 8.2 −19 3 35

Aug 1965 31.1 7.5 −28.9 1 29.2 −47.1 −7.4 12.1 185 29.5