Abstract
The ozone layer has a very important role in our atmosphere because it can protect every living on the surface of the earth against harmful Ultra Violet-B radiation. This study aims to discuss and analyze the linkages of ozone layer and Ultra Violet index (UVI) in Java Island and using of FFT to find the period that dominates the ozone layer and UVI variation. The results obtained are characteristic of ozone layer and UVI as well as linkage of UVI to ozone layer in Java Island. Using data of the Ozone Monitoring Instrument (OMI) sensor on AURA satellites from 2005—2016 has been obtained monthly, seasonal and annual characteristics for ozone and UVI and the period dominating the variation of the ozone layer and UVI. The ozone layer varied between 238 DU to 277 DU, the annual variation pattern peaked in October and the minimum in January. The UVI varies between 7.8 and 13.6. The annual variation of UVI peaked in October and the minimum in June. Linear regression of the UVI with ozone in December, January and February (DJF) showed a negative correlation coefficient of 0.77 which means there is a strong correlation between decreasing of ozone concentration with increasing of UVI. Variability of Java Island’s ozone layer is dominated by six month, 12-months and 28-months cycles. While UVI most dominated by the cycle of 6 months and 12 months.
Highlights
Life system on earth can be protected from Ultra Violet radiation due to the absorption of UV radiation by ozone, especially ozone in the stratosphere layer
The results show that: the amount of UV-B radiation that reaches the surface of the earth at a particular location is highly dependent on the amount/condition of the ozone layer in the area
The data used in this study is the ozone layer data (DU) and UV index (UVI) in Java Island area (5.5° S–8.75° S and 105° E– 115° E) as an observation result of Ozone Monitoring Instrument (OMI) from the AURA satellite obtained from NASA's data provider website
Summary
Life system on earth can be protected from Ultra Violet radiation due to the absorption of UV radiation by ozone, especially ozone in the stratosphere layer. Long-term observation and monitoring results show that ultraviolet radiation reaching the Earth's surface is increasing in response to the depletion of the ozone layer. The results show that: the amount of UV-B radiation that reaches the surface of the earth at a particular location is highly dependent on the amount/condition of the ozone layer in the area. When this ozone-depleting condition occurs in the stratosphere or in the troposphere, the total amount of ozone is reduced and the amount of ultra violet radiation reaching the earth's surface will increase proportionally. This research is part of a series of researches that support and realize the development of atmospheric compositions using satellite data [7] which is very useful for databases and to support the study of atmospheric characteristics in several regions of Indonesia
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