1School of Basic and Applied Science, Guru Gobind Singh Indraprastha University, Dwarka, India
2School of Vocational Studies and Applied Sciences, Gautam Budh University, Noida, Uttar Pradesh, India
*Author for corresponding: E-mail: rashmib22@gmail.com
This paper deals with the study of the variation of wavelet power spectrum and wavelet correlation coefficient with scale for air pollutant Carbon Monoxide (CO) between a pair of different locations of Delhi: (a) Delhi College of Engineering and ITO-Crossing, (b) Delhi College of Engineering and Mobile Van, (c) Delhi College of Engineering and Siri Fort, (d) ITO-Crossing and Mobile Van, (e) ITO-Crossing and Siri Fort, (e) Mobile Van and Siri Fort. It is observed that wavelet power spectrum for CO has three maxima and two minima at all locations between scale 0 to 2000. Maxima of both spectra corresponds to maximum values of CO and minimum in the spectra corresponds to a value which is the difference between maximum and minimum of CO. Variation in wavelet power spectrum with scale for CO also exhibits same behaviour. Also, it is observed that value of correlation coefficient increases with scale, reached a maximum and then decrease as further increase in scale.
Time Series, Air Pollutant, Wavelet Spectrum and Wavelet Cross Correlation
