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| Identifier |
000426277 |
| Title |
Διαχρονικές και εποχιακές διακυμάνσεις θερμοκηπικών αερίων στο Φινοκαλιά στην ανατολική Μεσόγειο |
| Alternative Title |
Interannual and seasonal variability of greenhouse gases at Finokalia station in the East Mediterranean |
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Author
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Γιαλεσάκης, Νικόλαος Ε.
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Thesis advisor
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Κανακίδου, Μαρία
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Reviewer
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Μιχαλόπουλος, Νικόλαος
Περγαντής, Σπυρίδων
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| Abstract |
Global warming caused by rising greenhouse gases has been a major problem in recent years. Greenhouse gases concentrations increase rapidly and human activities have a decisive influence. In the present study, the annual and diurnal variation of CO2, CH4, O3 and CO greenhouse gases in the Mediterranean region was measured at Finokalia station on Crete.
CO2 levels range from 392.7 to 414.7 ppm, with an average of 405.1 ± 5.8 ppm for the period 06/2014-12/2018. The annual variation showed an increase of 2.6 ppm/yr for the period 2015-2018. Seasonal variation shows maximum values in winter and autumn and minimum values in spring and summer, with no significant diurnal variation.
For CH4 the average is at 1929.2 ± 13.6 ppb and its levels range from 1899.4 to 1955.3 ppb for the period 06/2014-12/2018. The annual fluctuation study showed an increase of 7.1 ppb yr for the period 2015-2018. Seasonal variation is not strong but higher values are observed in summer and lower in winter. Diurnal variation is not significant.
CO ranges from 90.5 to 149.3 ppb with an average value of 120.1 ± 14.9 ppb for the period 06/2014-12/2018. The annual variation for carbon monoxide showed a decrease of 5 ppb / yr for the period 2015-2018. Seasonal variation shows maximum values in winter and minimum values in summer. Daily variation is very small and is not considered significant.
O3 has an average value of 48.9 9 ± 6.7 ppb and ranges from 36.9 to 62.9 ppb for the period 01 / 2014-12 / 2018. Due to the short life span in the atmosphere there is no clear behavioral trend of its concentration. Seasonal variation shows maximum values in summer and minimum values in winter. Daily variation is minimal and is not considered significant.
For the interpretation of the results, a comparison was made with measurements at monitoring stations around the world. In addition, factor analysis has been performed to correlate the concentrations of the studied greenhouse gases with factors that are driving their variability. For this purpose, multiple linear regression and the HYSPLIT model of NOAA network that computes air mass back trajectories were used.
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| Language |
Greek |
| Subject |
Carbon Dioxide |
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Carbon Monoxide |
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Enviroment |
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Methane |
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Ozone |
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Όζον |
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Δευτερογενείς μεταβολίτες |
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Διοξείδιο του Άνθρακα |
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Μεθάνιο |
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Μονοξείδιο του Άνθρακα |
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Περιβάλλον |
| Issue date |
2019-11-29 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
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Type of Work--Post-graduate theses
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| Views |
496 |
Διαχρονικές και εποχιακές διακυμάνσεις θερμοκηπικών αερίων στο Φινοκαλιά στην ανατολική Μεσόγειο
