Abstract:

It is believed that our country could be affected by climate change in the short or long term. In this study, the total amount of rainfall, which is a very important variable for climate change, was studied annually, seasonal and monthly. The work area was selected as the Samsun province, and the data of the Samsun and Bafra stations were used between the years 1990-2019. The main objective of the study is to analyze the change in the rain trend, and for this purpose two trend tests were used: Mann-Kendall (MK) test and Shen Innovative Trend Test (SHYTT). As a result of the tests implemented, a statistically meaningless increase in total annual rainfall in the Samsun station is seen, while a reduction in the Bafra station is seen. The total season of rain is in the winter season at the Samsun station α=0. At the level 5, there is a decline trend at the level α=0.1 at the Bafra station. In the Samsun station there is an increase in other seasons, while in the Bafra station there is an increase only in the summer season. The total monthly rainfall in the Samsun station is increasing in January, March, June, July and December; the trend is decreasing in other months. The Bafra station has a trend that increases in March, July, August and December; a trend that decreases in other months.

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Abstract:

It is thought that our country may be affected by climate change in the short or long term. In this study, the total amount of precipitation, which is a very important variable for climate change, has been examined monthly, seasonally and annually. The study area was chosen as Samsun province, and data of Samsun and Bafra stations between 1990-2019 were used. The main purpose of the study is to analyze the change in the trend of precipitation and two trend tests were used for this: Mann-Kendall (MK) test and Şen Innovative Trend Test (ŞYTT). As a result of the tests applied, a statistically insignificant increase was observed in the annual total precipitation at Samsun station, while a decrease was observed at Bafra Station. It is observed that there is a decreasing trend in total seasonal precipitation at the level of α = 0.05 at Samsun station and α = 0.1 at the Bafra station in winter. While there is an increase in Samsun station in other seasons, at Bafra station it is seen only in summer season. Monthly total precipitation increased in Samsun station in January, March, June, July and December; there is a decreasing trend in other months. At Bafra station, on the other hand, it increased in March, July, August and December; there is a decreasing trend in other months.