Statistical Analysis of Total Column Ozone over Uttarakhand: Environment of Himalaya

Asian Journal of Atmospheric Environment

卷:15

Namrata Deyal¹  Nandan S. Bisht¹  Vipin Tiwari¹ 

[1] Department of Physics, Kumaun University SSJ Campus Almora-263601, Uttarakhand, India;

关键词: total column ozone;    himalayan region;    temporal variation;    correlation coefficient;   

DOI  :  10.5572/ajae.2021.038

来源: DOAJ

【 摘 要 】

Total Column Ozone (TCO) is a critical factor affecting the earth’s atmosphere,especially in the Himalayan region. A comprehensive study of TCO trend analysisand corresponding consequences in the Himalayan atmosphere needs to be analyzed.We statistically examine TCO variability by analyzing the daily TCO dataset of the last 15years (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 seasonwhereas it shows the least value during the winter season. The highest and lowestvalue of Coefficient of Relative Variance (CRV) is estimated as 3.14 and 1.09 during winterand monsoon season, respectively. Air mass trajectories have been estimated usingHybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT), which shows the existenceof strong seasonal variability of Ozone corresponding to continental and maritimetransportation towards Uttarakhand. Moreover, Least Square Method (LSM) and theMann-Kendall test estimate a high correlation (86%) for the seasonal and annual trend ofTCO with a negative rate. The obtained decreasing rate is very low which indicates recoveryof TCO during the study period. Further results imply that the inter-annual oscillationpattern of TCO is similar to Quasi-Biennial Oscillation (QBO) significantly. In addition, acomparative study has been performed for the data measured by two TCO measuringinstruments i.e. Ozone Monitoring Instrument (OMI) and Ozone Mapping Profiler Suite(OMPS). TCO values measured from both instruments are highly correlated (96%) with anaverage relative difference of around 3%. The outcomes of this study are expected to bebeneficial for future study of TCO over other crucial regions of Himalayan territory.

【 授权许可】

Unknown