Spectral analysis approach to study the association between total ozone concentration and surface temperature
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Spectral analysis approach to study the association between total ozone concentration and surface temperature G. Chattopadhyay1 · S. Chattopadhyay2 Received: 27 January 2020 / Revised: 22 April 2020 / Accepted: 4 May 2020 © Islamic Azad University (IAU) 2020
Abstract The present study endeavors to explore the association between total column ozone (TCO) and surface temperature (ST) over Kolkata, India, during September–November through time series approach. A spectral analysis approach is adopted to investigate the existence of any common cycle in TCO and ST time series. The spectra have been computed, and it has been observed that there exist common spectra of period 24 in both the time series explored in daily scale. The existence of common spectra among TOC and ST during the transition period from monsoon to post-monsoon has been interpreted as a proof of the similarity in fluctuation pattern of TCO and ST. Details of the dependence of the variability of TCO on ST have been discussed. Keywords Total column ozone · Surface temperature · Spectral analysis · Post-monsoon
Introduction Variation in the thermal structure of the stratosphere as well as troposphere with changes in total ozone is well documented in the literature (Varotsos 2004; Varotsos et al., 2017a, b; Varotsos and Kirk-Davidoff 2006; Brunamonti et al. 2018; Oh et al. 2018; Shangguan et al. 2019). Increase in the tropospheric ozone is caused by anthropogenic practices (Varotsos et al., 2017a, b). However, the stratospheric ozone decreases due to anthropogenic practices. The temperature of the lower atmosphere increases with increase in the tropospheric ozone. On the other hand, the decrease in stratospheric ozone results in a decrease in the temperature. The tropospheric and stratospheric ozone has the capacity to absorb the infrared radiation that is emitted by the surface of the earth. Thus, the heat from the earth’s surface is trapped by ozone in troposphere and stratosphere. An Editorial responsibility: M. Abbaspour. * S. Chattopadhyay [email protected] 1
Department of Atmospheric Sciences, University of Calcutta, 51/2 Hazra Road, Kolkata 700019, India
Department of Mathematics, Amity University, Kolkata, Major Arterial Road, Action Area II, Rajarhat, New Town, Kolkata 700135, India
2
additional potential of the stratospheric ozone is to absorb solar radiation. The total column ozone (TCO) signifies over some given region, the sum of tropospheric and stratospheric ozone. A plethora of works have been reported on ozone over India (e.g., Sahoo et al. 2005; Tandon and Attri 2011; Chattopadhyay and Chattopadhyay 2009; Londhe et al. 2005; Efstathiou et al. 2003). A considerable number of studies on ozone and temperature observations are all over the globe (Steinbrecht et al. 2003, 2006). These observations indicate that the ozone precursors have experienced a considerable change due to industrialization that has led to changes in anthropogenic sources. As a consequence, changes have occurred to the radiative
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