Statistical Analysis of Total Column Ozone over Uttarakhand: Environment of Himalaya
Total Column Ozone (TCO) is a critical factor affecting the earth’s atmosphere, especially in the Himalayan region. A comprehensive study of TCO trend analysis and corresponding consequences in the Himalayan atmosphere needs to be analyzed. We statistically examine TCO variability by analyzing th...
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
Springer
2021-06-01
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Series: | Asian Journal of Atmospheric Environment |
Subjects: | |
Online Access: | https://doi.org/10.5572/ajae.2021.038 |
Summary: | Total Column Ozone (TCO) is a critical factor affecting the earth’s atmosphere,
especially in the Himalayan region. A comprehensive study of TCO trend analysis
and corresponding consequences in the Himalayan atmosphere needs to be analyzed.
We statistically examine TCO variability by analyzing the daily TCO dataset of the last 15
years (2005-2019) over the crucial region of the Himalayan environment i.e. Uttarakhand,
India. Obtained results indicate that TCO values are at peak during the spring season
whereas it shows the least value during the winter season. The highest and lowest
value of Coefficient of Relative Variance (CRV) is estimated as 3.14 and 1.09 during winter
and monsoon season, respectively. Air mass trajectories have been estimated using
Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT), which shows the existence
of strong seasonal variability of Ozone corresponding to continental and maritime
transportation towards Uttarakhand. Moreover, Least Square Method (LSM) and the
Mann-Kendall test estimate a high correlation (86%) for the seasonal and annual trend of
TCO with a negative rate. The obtained decreasing rate is very low which indicates recovery
of TCO during the study period. Further results imply that the inter-annual oscillation
pattern of TCO is similar to Quasi-Biennial Oscillation (QBO) significantly. In addition, a
comparative study has been performed for the data measured by two TCO measuring
instruments i.e. Ozone Monitoring Instrument (OMI) and Ozone Mapping Profiler Suite
(OMPS). TCO values measured from both instruments are highly correlated (96%) with an
average relative difference of around 3%. The outcomes of this study are expected to be
beneficial for future study of TCO over other crucial regions of Himalayan territory. |
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ISSN: | 1976-6912 2287-1160 |