Bulletin of ANPA

Abstract submitted to ANPA Conference July 14–16, 2023

Volume 5, Number 1

Astronomy /Space Science /Cosmo Science/ Atmospheric

Abstract ID: ANPA2023-N0009

Abstract:

ANPA2023-N0009: Temporal variation of Atmospheric Ozone over Kathmandu Valley

Authors:

• Prakash Man Shrestha; Patan Multiple Campus, IoST, TU, Nepal

• Narayan Prasad Chapagain; Amrit Campus,IoST,TU

• Indra Bahadur Karki; Patan Multiple Campus, IoST,TU

The main aim of this project is to study temporal the variation of atmospheric ozone over Kathmandu Valley (27.72o N, 85.32oE, 1350 m asl). The daily data of Total Ozone column (TOC) is received from OMI satellite of NASA for 11 years of solar cycle-24 (2008 to 2018). The monthly, seasonal and annual variations of TOC are studied. The maximum value of monthly average of TOC is found 282 ± 8 DU in April, while the minimum value is found 252 ± 7 DU in December. The results also shows that TOC is seasonal dependent with larger value of TOC 174 ± 10 DU in pre monsoon and lower value of 258 ± 5DU in post monsoon. The annual average of TOC exhibits slightly variable with a maximum 280 ± 15 DU in 2015 and minimum 249 ± 10 DU in 2009. The average value of TOC during the whole study period is found 267 ± 17 DU, which indicates a good amount of stratospheric ozone content over Kathmandu Valley. Continuous wavelet transform (CWT) is also used to analysis variation of TOC. The power density of TOC 25000 DU2 is recorded from 2010 to mid of 2011 and 2015 to end of 2017. This research work is beneficial for the further identification and analysis of TOC at different places with same geography.

To cite this abstract, use the following reference: https://anpaglobal.org/conference/2023/ANPA2023-N0009