Journals / Coğrafi Bilimler Dergisi / 2007 / Cilt: 5 - Sayı: 1

Spatial and Temporal Analysis of the Changes and Trends in Precipitation Total and Intensity Series of Turkey

TÜRKİYE’NİN YAĞIŞ TOPLAMI VE YOĞUNLUĞU DİZİLERİNDEKİ DEĞİŞİKLİKLERİN VE EĞİLİMLERİN ZAMANSAL VE ALANSAL ÇÖZÜMLEMESİ

Pages
57–73
Publication Date
2007-04-01
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Major findings of the paper can be summarized as follows: (1) Apparent decreasing trends in annual precipitation totals and precipitation intensity amounts are stronger in the Mediterranean and Black Sea rainfall regime regions of Turkey. (2) There is an apparent decreasing (drying) trend in the precipitation totals of winter season, while a general increasing trend is dominant in the precipitation totals of spring, summer and autumn. (3) Precipitation intensity amounts have tended to show a decrease in all seasons, and this decrease is stronger than the decrease detected in precipitation totals in terms of both coherence of the spatial distribution and magnitude of the statistical significance. (4) Decreasing trends observed in precipitation totals and precipitation intensity amounts are the strongest over the Mediterranean and the Black Sea rainfall regime regions. (5) Decreasing trend in precipitation intensity became stronger after the year 1950

📌 3 Key Takeaways

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Objective & Hypothesis:In the study, long-term changes and trends in the series of seasonal and annual precipitation total and precipitation intensity of 111 stations in Turkey were analyzed by considering their spatial and temporal characteristic.
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Key Findings & Data:Homogeneity of precipitation series and trends in precipitation total and precipitation intensity series were tested with the methods of Kruskal-Wallis homogeneity test and Mann-Kendall rank correlation coefficient test, respectively.
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Conclusion & Impact:Major findings of the paper can be summarized as follows: (1) Apparent decreasing trends in annual precipitation totals and precipitation intensity amounts are stronger in the Mediterranean and Black Sea rainfall regime regions of Turkey. (2) There is an apparent decreasing (drying) trend in the precipitation totals of winter season, while a general increasing trend is dominant in the precipitation totals of spring, summer and autumn. (3) Precipitation intensity amounts have tended to show a decrease in all seasons, and this decrease is stronger than the decrease detected in precipitation totals in terms of both coherence of the spatial distribution and magnitude of the statistical significance. (4) Decreasing trends observed in precipitation totals and precipitation intensity amounts are the strongest over the Mediterranean and the Black Sea rainfall regime regions. (5) Decreasing trend in precipitation intensity became stronger after the year 1950
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Precipitation · observed climate change and variability · Kruskal-Wallis homogeneity and Mann-Kendall trend tests

Abstract

In the study, long-term changes and trends in the series of seasonal and annual precipitation total and precipitation intensity of 111 stations in Turkey were analyzed by considering their spatial and temporal characteristic. Homogeneity of precipitation series and trends in precipitation total and precipitation intensity series were tested with the methods of Kruskal-Wallis homogeneity test and Mann-Kendall rank correlation coefficient test, respectively. Major findings of the paper can be summarized as follows: (1) Apparent decreasing trends in annual precipitation totals and precipitation intensity amounts are stronger in the Mediterranean and Black Sea rainfall regime regions of Turkey. (2) There is an apparent decreasing (drying) trend in the precipitation totals of winter season, while a general increasing trend is dominant in the precipitation totals of spring, summer and autumn. (3) Precipitation intensity amounts have tended to show a decrease in all seasons, and this decrease is stronger than the decrease detected in precipitation totals in terms of both coherence of the spatial distribution and magnitude of the statistical significance. (4) Decreasing trends observed in precipitation totals and precipitation intensity amounts are the strongest over the Mediterranean and the Black Sea rainfall regime regions. (5) Decreasing trend in precipitation intensity became stronger after the year 1950

Özet

Çalışmada, Türkiye’deki 111 istasyonun yıllık ve mevsimlik yağış toplamı ve yağış yoğunluğu dizilerindeki uzun süreli değişiklikler ve eğilimler, zaman ve alandaki özellikleri dikkate alınarak çözümlendi. Yağış verilerinin homojenliği Kruskal-Wallis türdeşlik sınaması, yağış toplamı ve yoğunluğu dizilerindeki eğilimler ise, Mann-Kendall sıra ilişki katsayısı sınaması yöntemleri ile incelendi. Makalenin başlıca bulguları şöyle özetlenebilir: (1) Yıllık toplam yağışlarda ve yağış yoğunluğu tutarlarında belirgin olan azalma eğilimleri, Akdeniz ve Karadeniz yağış rejimi bölgelerinde daha kuvvetlidir. (2) Kış mevsimi toplam yağışlarında belirgin bir azalma (kuraklaşma) eğilimi bulunmasına karşın, ilkbahar, yaz ve sonbahar toplam yağışlarında genel bir artış eğilimi egemendir. (3) Yağış yoğunluğu tutarları, tüm mevsimlerde bir azalma gösterme eğilimindedir ve bu azalma, toplam yağışlarda bulunan azalmadan hem alansal dağılışın tutarlılığı hem de istatistiksel anlamlılığın büyüklüğü açılarından daha kuvvetlidir. (4) Kış toplam yağışlarında gözlenen azalma eğilimi Akdeniz’de, yağış yoğunluğu tutarlarındaki azalma eğilimi ise Karadeniz yağış rejimi bölgesinde en kuvvetlidir. (5) Yağış yoğunluğundaki azalma eğilimi, yaklaşık 1950 yılından sonra kuvvetlenmiştir

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Cite This Article

TÜRKEŞ, M., KOÇ, T., SARIŞ, F. (2007). Spatial and Temporal Analysis of the Changes and Trends in Precipitation Total and Intensity Series of Turkey. Coğrafi Bilimler Dergisi, Cilt: 5 - Sayı: 1, 57–73. https://ajindex.com/articles/163768

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