Changes in the climatic growing season in western Anatolia, Turkey,Meteorological Applications

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Changes in the climatic growing season in western Anatolia, Turkey
Meteorological Applications ( IF 2.3 ) Pub Date : 2020-03-12 , DOI: 10.1002/met.1897
Ebru E. Arslantaş ₁ , Ercan Yeşilırmak ₁

Affiliation

In this study spatial and temporal variations of climatic growing season parameters in western Anatolia, Turkey, during 1966–2015 are analysed. The beginning of the growing season (end of the growing season) for all threshold values of 5, 7 and 10°C is delayed (advances) from the southwest to the northeast over the study area. The growing season length (GSL) increases from northeast to southwest. The growing season start (GSS), growing season end (GSE) and GSL are strongly correlated with elevation, low‐elevation stations having earlier GSS, later GSE and longer GSL than stations at higher elevations. The regional average GSS shifted 7.3, 10.0 and 10.5 days earlier, while the regional average GSE moved 4.8, 6.1 and 6.2 days later, increasing the GSL by 12.0, 16.6 and 15.9 days for 5, 7 and 10°C, respectively. A comparison of mean values between subperiods documented significant changes at more than 50% of stations for GSS and GSL from the subperiod 1977–1997 to the subperiod 1998–2015 and almost no significant change between 1966–1976 and 1977–1997 for all thresholds. Correlation analysis showed that the East Atlantic Pattern was the main driver for GSS and the North Sea–Caspian Pattern for GSE, followed by the East Atlantic/Western Russia Pattern and the North Atlantic Oscillation, respectively. Monthly and annual precipitation totals and precipitation distribution within a year have not changed significantly, suggesting that air temperature has become more influential on GSS and GSE.

中文翻译：

土耳其安纳托利亚西部气候生长季节的变化

在这项研究中，分析了1966-2015年期间土耳其安那托利亚西部气候生长季节参数的时空变化。所有阈值5、7和10°C的生长季节开始（生长季节结束）从研究区域的西南到东北延迟（提前）。生长季节长度（GSL）从东北到西南增加。生长季节的开始（GSS），生长季节的结束（GSE）和GSL与海拔高度相关，与高海拔站相比，低海拔站的GSS较早，GSE较晚且GSL较长。区域平均GSS提前7.3天，10.0天和10.5天，而区域平均GSE则在4.8天，6.1天和6.2天后移动，分别在5、7和10°C下将GSL分别提高了12.0、16.6和15.9天。子时段之间的平均值比较表明，从1977-1997子时段到1998-2015子时段，GSS和GSL台站的50％以上发生了显着变化，并且在1966-1976和1977-1997期间，所有阈值几乎没有显着变化。相关分析表明，东大西洋格局是GSS的主要驱动力，北海里海格局是GSE的主要驱动力，其次分别是东大西洋/俄罗斯西部格局和北大西洋涛动。每月和每年的降水总量和一年内的降水分布没有明显变化，这表明气温对GSS和GSE的影响更大。

更新日期：2020-03-12

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