R. Samuel Selvaraj ¹, S. Tamil Selvi ², S. P. Vimal Priya ¹

Affiliations
1 Presidency College, Department of Physics, Chennai-600 005, IN
2 Dhanalakshmi Srinivasan College of Engineering & Technology, Chennai-603 104, IN

Abstract

The possible relationship between surface ozone and smoothed sunspot numbers (SSN) has been studied. The sunspot data were collected from Udaipur Solar Observatory for 1996-2004. Surface ozone has been measured at Tranquebar (11°N, 79.9 °E), a tropical rural coastal site on the east coast of southeast India, during the same period. The measurements have shown that there exists a significant diurnal cycle/oscillation of average ozone with a maximum concentrations in the afternoon and average minimum ozone concentration at sunrise. Ozone measurements have also shown that the average higher concentrations [23 ± 9 ppbv] in May and lower concentration (17±7 ppbv) in October at this site. Further, the increase in surface ozone in association with increase in sunspot numbers is observed during May and October.

Keywords

Smoothed Sunspot Numbers, Surface Ozone, Significant Diurnal Cycle

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R. Samuel Selvaraj ¹, T. Gopinath ¹, K. Jayalakshmi ¹

Affiliations
1 Department of Physics, Presidency College, Chennai- 600 005, IN

Abstract

Surface ozone has been measured at Tranquabar (11°N, 79°9'E), a tropical rural site on the east coast of south India, during the years 1996 to 2004. The sunspot data were collected from Udaipur solar observatory during the same period. The relationship between annual mean smoothed sunspot number and annual mean surface ozone levels are studied by Pearson product moment correlation coefficient and that is found to be a high value 0.94. High positive rank correlation coefficients 0.76 and 0.62 obtained for the years 2000 and 2002 indicates the influence of higher solar activity over the surface ozone levels.

Keywords

Smoothed Sunspot Numbers, Surface Ozone, Solar Activity

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R. Samuel Selvaraj ¹, B. Milton Boaz ¹, C. P. Sachithananthem ¹, K. Padma ¹, S. Steephen Rajkumar Inbanathan ², G. Kanmani Rajaselvi ¹, P. Indira ², S. P. Vimalpriya ¹

Affiliations
1 Postgraduate Research Department of Physics, Presidency College-600 005, Chennai, IN
2 Postgraduate Research Department, the American College, Madurai-625 002, IN

Abstract

The Ozone concentration is influenced by the intensity of solar radiation and chemical reaction between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of sunlight. This study aspires to asses distribution of the surface zone concentration, characteristics of hourly and daily mean surface Ozone with different climatic parameters, such as temperature, relative humidity, and wind speed over Tamil Nadu. Measurement was carried out at 11-stations (except this study no data is made available) having different weather conditions during the period from 8^th June to 7^th July of the year 2011. We were the first researchers visited most of the district of Tamil Nadu state and measured surface Ozone. We have made an effort to identify areas where there is elevated surface Ozone concentration. Results of this study reveals that hourly and daily mean values of ground level Ozone concentrartion in Tamil nadu was 0.0109ppm and 0.0108ppm respectively. The highest ground level Ozone concentration was in Kanniya kumari district (0.0179 ppm). The lowest was in Cuddalore district (0.0038ppm). During the study period, the concentration of ground level Ozone over Tamil Nadu had never exceeded the prescribed value (0.075ppm). The results of this study show that ground level Ozone concentration has a positive correlation with the temperature and negative correlation with the relative humidity and wind speed.

Keywords

Surface Ozone, Diurnal Cycle, Meteorological Parameters, Anthropogenic Sources, VOCs, Nox

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P. Indira ¹, S. Stephen Rajkumar Inbanathan ², R. Samuel Selvaraj ³, A. Antony Suresh ³

Affiliations
1 The Research and Development Centre, Bharathiar University, Coimbatore - 641046, Tamil Nadu, IN
2 Postgraduate Research Department, The American College, Madurai - 625002, Tamil Nadu, IN
3 Department of physics, Presidency College, Chennai - 600005, Tamil Nadu, IN

Abstract

In recent years numerous research were made to are expecting the weather especially the most temperature of a location. The urban regions are the maximum vulnerable regions which can be tormented by the increase in the temperature. The prevailing paper is geared toward quantifying the trade inside the surface air temperature at the most populated metropolitan town Chennai. The town has experienced rapid urbanization in the latest beyond. The principle objective of the paper is to broaden a forecast model for max temperature of the metropolis. The nonlinear nature of the temperature time series is analysed the usage of the lyapunov exponent. The effects of lyapunov exponent shows that there is chaos present inside the time collection facts. This gives a terrific foundation for the choosing reasonable forecasting version along with the segment area reconstruction strategies proposed via farmer forecast the temperature all through the summer season months.

Keywords

Chaos, Lyapunov Exponent, Phase Space Reconstruction.

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