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首页> 外文期刊>Journal of hydrometeorology >Spatiotemporal Hydroclimate Variability in Finland: Past Trends
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Spatiotemporal Hydroclimate Variability in Finland: Past Trends

机译：芬兰的时空水池变异性：过去的趋势

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Over the past decades, Finland has experienced changes in its climate: temperature and precipitation have increased, resulting in varying runoff patterns. These trends are well studied, but the changes in interannual variability are less known, despite their importance for understanding climate change. This research aims to assess spatiotemporal changes in variability of temperature, precipitation, and runoff for 1962-2014 at the subbasin scale in Finland. Temporal changes in variability were analyzed by constructing moving-window median absolute deviation time series at annual and seasonal scales. Subbasins with similar patterns of temporal variability were identified using principal component analysis and agglomerative hierarchical clustering. Presence of monotonic trends in variability was tested. Distinct areas with similar patterns of statistically significant changes in variability were found. Decreases in annual, winter, and summer temperature variability were discovered across Finland, in southern Finland, and in northern Finland, respectively. Precipitation variability increased in autumn in northern Finland. It also decreased in winter and spring in northern and central parts of Finland. Runoff variability increased in winter in most parts of Finland and in summer in the central parts, but decreased in spring in southern Finland. Comparison with existing studies illustrates that trends in mean climate and its variability do not necessarily match, highlighting the importance of addressing both aspects. The findings of this study provide new information on hydroclimatic variability in Nordic conditions and improve the possibility to adapt and predict the changes in hydroclimatic conditions, including weather extremes.
机译：在过去几十年中，芬兰经历了气候变化：温度和降水量增加，导致不同的径流模式。尽管他们对理解气候变化的重要性，但这些趋势已经很好地研究，但持续可变异性的变化较少。该研究旨在评估1962 - 2014年在芬兰的亚巴巴辛规模的温度，降水和径流变异性变化的时空变化。通过在年度和季节性尺度构建移动窗口中位绝对偏差时间序列来分析变异性的时间变化。使用主成分分析和附聚层间聚类来鉴定具有相似时间变异性模式的亚比基辛。测试了可变性中单调趋势的存在。发现了具有类似统计变化变化变化模式的明显区域。在芬兰，芬兰南部和芬兰北部分别发现了年度，冬季和夏季温度变异性。芬兰北部的秋季降水可变性增加。它在芬兰北部和中部地区的冬季和春季也减少。在芬兰大多数部分和中央部位的夏天，冬季冬季径流变异增加，但春季春季春季下降。与现有研究的比较说明了平均气候的趋势及其变异性不一定匹配，突出了解决两个方面的重要性。该研究的结果提供了关于北欧条件下的含水革曲线变异性的新信息，并改善了适应和预测含水革条件的变化的可能性，包括天气极端。

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