Regional average Mann-Kendall trend analysis of monthly temperature data in Aegean region, Turkey

One of the most significant current environmental issue is the climate change. The researches that to find out numerous effects of climate change intensely have been carrying on. While the climate change effects are investigated,non-parametric and parametric trend tests have been commonly used in hydro-meteorological time series. Aegean Region that expected to be most affected by potential climate-change impacts in Turkey, were investigated in this study. Non-Parametric Mann-Kendall Rank Correlation test was applyed station-based on monthly temperature data of 13 meteorological station in the Aegean Region. And also Regional Average Mann-Kendall Rank Correlation Test was applied to determine regional temperature tendency. According to the monthly results of each meteorological station, an increase in temperature values were observed statistically significant at %5 and %1 level during April-October. According to the seasonal results of each meteorological station, an increase was calculated for 4 seasons at all stations. In addition to this, a statistically significant increase is observed only in summer for all stations. According to regional test results, an overall increases in temperature trend in the region were determined while statistically significant regional trends were observed especially May- September. In addition, seasonal temperature trends were observed to be increased for 4 seasons. Except for winter, seasonal temperature trends were determined statistically significant. The maximum temperature change in this region during the 51-year record period is 0.092 ° C / month; And the minimum temperature change was -0.007 ° C / month.