Mediterranean warming is especially due to summer season Evidences from Tuscany (central Italy)
Mediterranean warming is especially due to summer season Evidences from Tuscany (central Italy)
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DOI：
10.1007/s00704-011-0481-1
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发表时间：
2012-01-01
影响因子：
3.4
通讯作者：
Orlandini, Simone
中科院分区：
文献类型：
--
作者：
Bartolini, Giorgio;di Stefano, Valentina;Orlandini, Simone
我们为托斯卡纳（意大利）的地中海中部地区创建了一个新的均质每日最低和最高温度数据集（1955-2007）。研究了一些气候和极端气候指数的年度和季节长期趋势。结果突显出平均气温每 50 年上升约 0.9A 摄氏度的积极趋势，最高气温的上升更为明显。季节性分析显示，夏季（六月、七月、八月）和春季（三月、四月、五月）的气温比秋季和冬季要高得多，这一发现与最近的地中海证据一致。极端温暖天气总体呈增加趋势，霜冻日数和极端寒冷天气略有减少，但不显着。与地中海变暖不同模式的比较证实了最近气温快速上升的幅度，特别是在夏季。这种变化可能是由于过去几十年来大气环流模式的改变以及依赖于土壤湿度的土地温度、土地降水正反馈过程造成的。所有这些结果都证实地中海是一个特别敏感的地区，因此非常容易受到气候变化的影响。
We created a new homogenized daily minimum and maximum temperature data set (1955-2007) for the central Mediterranean area of Tuscany (Italy). Yearly and seasonal long-term trends of some climatic and extreme climatic indices were investigated. The results highlighted a positive trend for mean temperature of about 0.9A degrees C per 50 years with a slightly more pronounced increase in maximum temperature. Seasonal analysis revealed a by far much greater increase in summer (June, July, August) and spring (March, April, May) temperature in respect of autumn and winter, this finding consistent with most recent Mediterranean evidences. Warm extremes showed an overall tendency to increase, while a slight not significant decrease trend was found in regard to frost days and cold extremes. Comparisons with different patterns of Mediterranean warming confirmed the magnitude of recent very fast rise in temperature, especially during summer. This change could be due to last decades modifications of general circulation patterns and land-temperature, land-precipitation positive feedback processes dependent from soil moisture. All these results confirm that the Mediterranean is a region especially responsive and thus very vulnerable to climate change.