Study on Ozone Variation and its Relation with Solar Radiation in Vietnam Using Satellite Observation
Main Article Content
Abstract
Ozone and ultraviolet radiation (UV) make direct influences on human health on the Earth. Various satellites have been launched for collecting data of these two parameters. In this study, observations of daily average of total ozone and ultraviolet radiation by OMI satellite (Ozone Monitoring Instrument) are processed and compared with surface measurements at Hanoi station during two years of 2018-2019 for their quality evaluation and analyses. The results showed that OMI data had high correlation with surface measurements: 0,89 for total ozone and 0,70 for UV radiation, convincing their realibity for spatial and temporal variation analyses for Vietnam region. Negative Mean bias error (MBE) and right hand inclination of scatter plot indicated that OMI data underestimated both total ozone and UV radiation of surface observations. Spatial analyses revealed that factors including geographic locations, topography, and season are influencing on spatial and temporal variations of total ozone and UV radiation. Specifically, UV radiaiton is not in linear relation with total ozone, but in logarithm function. There is variation in correlation values by seasons and in space, particularly lower in Mekong River Delta region.
References
[2] M. L. Salby P.F. Callaghan, Fluctuations of Total Ozone and Their Relationship to Stratospheric Air Motions, J. Geophys. Res. Atmospheres, Vol. 98, 1993, pp. 2715-2727, https://doi.org/10.1029/92JD01814.
[3] L. Shen, D. J. Jacob, X. Liu, G. Huang, K. Li, H. Liao,T. Wang, An Evaluation of The Ability of The Ozone Monitoring Instrument (OMI) to Observe Boundary Layer Ozone Pollution Across China: Application to 2005-2017 Ozone Trends, Atmospheric Chemistry and Physics, Vol. 19, 2019, pp. 6551-6560, https://doi.org/10.5194/acp-19-6551-2019.
[4] S. D. Eastham, D. W. Keith, S. R. H. Barrett, Mortality Tradeoff between Air Quality and Skin Cancer from Changes in Stratospheric Ozone, Environmental Research Letters, Vol. 13, 2018, pp. 034-035, https://doi.org/10.1088/1748-9326/aaad2e.
[5] N. V. Hiep, Research on Changes in Surface Ozone Concentration in The Air in Some Areas in The North of Vietnam: Master Thesis in Environmental Science: 604403, VNU Hanoi University of Science, 2018 (in Vietnamese).
[6] E. C. Laan, J. D. Vries, B. Kruizinga, H. Visser, P. F. Levelt, G. H. J. Oord, A. Maelkki, G. W. Leppelmeier, E. Hilsenrath, Ozone Monitoring with The OMI Instrument, International Society for Optics and Photonics, Vol. 4132, 2000, pp. 334-343.
[7] P. F. Levelt, G. H. J. Oord, M. R. Dobber, A. Malkki, H. Visser, J. Vries, P. Stammes, J. O. V. Lundell, H. Saari, The Ozone Monitoring Instrument, IEEE Transactions On Geoscience And Remote Sensing, 44, 2006, pp. 1093-1101, https://doi.org/10.1109/TGRS.2006.872333.
[8] J. R. Herman, Global Increase in UV Irradiance During The Past 30 Years (1979–2008) Estimated From Satellite Data, J. Geophys. Res. Atmospheres, Vol. 115, 2010, https://doi.org/10.1029/2009JD012219.
[9] S. C. Liu, M. Trainer, Responses of the Tropospheric Ozone And Odd Hydrogen Radicals to Column Ozone Change, J. Atmos. Chem, Vol. 6, 1988, pp. 221-233, https://doi.org/10.1029/92GL00378.