Trong nghiên cứu này, các quan trắc về ozone và bức xạ cực tím từ vệ tinh OMI (Ozone Monitoring Instrument) được xử lý và so sánh với những giá trị đo tại trạm quan trắc tại Hà Nội trong giai đoạn năm 2018-2019 để ước tính và đánh giá chất lượng, độ tin cậy của nguồn số liệu vệ tinh. | VNU Journal of Science Medical and Pharmaceutical Sciences Vol. 37 No. 3 2021 107-115 Original Article Study on Ozone Variation and its Relation with Solar Radiation in Vietnam Using Satellite Observation Phan Thi Thuy Duong1 Pham Thi Thanh Nga2 Do Trung Truc3 1 Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Cau Giay Hanoi Vietnam 2 Vietnam Institute of Meteorology Hydrology and Climate Change 23 62 Nguyen Chi Thanh Dong Da Hanoi Vietnam 3 Aero meteorological observatory AMO Vietnam Meteorological and Hydrological Administration 8 Phao Dài Lang Hanoi Vietnam Received 15 September 2020 Revised 26 January 2021 Accepted 15 February 2021 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. Keywords Ozone ultraviolet radiation OMI satellite ozone variation. _ Corresponding author. E-mail address .
