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Trace gases behaviour in sensitive areas of the northwestern Himalaya-A case study of Kullu-Manali tourist complex, India

Kuniyal, JC and Rao, PSP and Momin, GA and Safai, PD and Tiwari, S and Ali, K (2007) Trace gases behaviour in sensitive areas of the northwestern Himalaya-A case study of Kullu-Manali tourist complex, India. Indian Journal of Radio and Space Physics, 36 (3). pp. 197-203.

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Abstract

Surface concentration of the three important trace gases, ozone (O3), nitrogen dioxide (NO2) and sulphur dioxide (SO2) were measured at three different tourist locations, namely Kullu, Manali and Kothi in the northwestern Himalayan region, which are located at 1220 m, 2050 m and 2530 m above the mean sea level mainly to asses the anthropogenic impact. The surface O3 was monitored for four years during the period 1998 - 2002 and 2004 at the time of peak tourist season (May- June), and SO2 and NO2 were measured during the entire period in 2003. The peak O3 concentrations reached close to 50 ppb level, while the annual mean concentrations of O3, SO2 and NO2 remained within the United States Environmental Protection Agency's (USEPA's) National Ambient Air Quality Standards (NAAQS). The peak hourly average values of O3 was 44 ppb at Manali and 32 ppb at Kothi during evening (1700 hrs IST), while that at Mohal (near Kullu) was 32 ppb in the afternoon (1500 hrs IST) period. The seasonally average value of maximum concentration of NO2 was 3.8±0.6 μg m-3 at Kothi and 7.6±1.0 μg m-3 at Mohal in autumn (October-November), while that of SO2 was 21.4±1.8 μg m-3 at Kothi and 18.8±1.3 μg m-3 at Mohal during the monsoon (July-September) and summer (April-June) periods, respectively. Vehicular emissions and biomass burning for heating and cooking during the winter period (especially when power failure is common) as well as during forest fires could be the major contributors for increased emissions of these trace gases. However, the influence of long-range transport may also be important.

Item Type: Article
Additional Information: Copyright of this article belongs to CSIR-NISCAIR.
Uncontrolled Keywords: Surface ozone;Nitrogen dioxide;Sulphur dioxide;Kullu-Manali;Northwestern Himalaya
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 07 Jan 2015 05:20
Last Modified: 07 Jan 2015 05:20
URI: http://moeseprints.incois.gov.in/id/eprint/1892

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