Trend analysis of significant wave height and energy period in southern Italy
Trend analysis of significant wave height and energy period in southern Italy
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DOI：
10.1007/s00704-019-02879-9
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发表时间：
2019-10-01
影响因子：
3.4
通讯作者：
Ferraro, D. Algieri
中科院分区：
文献类型：
--
作者：
Caloiero, T.;Aristodemo, F.;Ferraro, D. Algieri
地中海受到重大和多变的气候变化的影响。在这项工作中，对卡拉布里亚地区（意大利南部）沿海39年的波浪时间序列进行了分析，以确定两个合成参数（显著波高和能量周期）的持续趋势。首先，从欧洲中期天气预报再分析中心（ERA-Interim）的全球大气再分析数据集中获取波浪数据，并对其进行处理以检查其质量。然后，对数据进行地理变换，以传递代表性水深100 m处的波浪参数。最后，使用非参数Mann-Kendall （MK）检验和图形技术创新趋势分析（ITA）进行趋势分析，该技术可以识别一系列中几个值的趋势。在年和季节尺度上，MK试验的结果主要表现为有效波高的轻微增加或零增加和能量周期的相应增加，波浪的出现对波浪能的大小有影响。此外，ITA方法强调了相关波参数的最高值普遍增加。对于所研究的地区，这些方面对海滩的退缩和未来用于电力目的的波浪能转换器（WECs）的现场装置产生重大影响。
The Mediterranean Sea is subject to significant and variable climatic changes. In this work, an analysis of a 39-year-long wave time series was performed in order to identify ongoing trends of two synthetic parameters, significant wave height and energy period, along the coasts of the Calabria region (southern Italy). First, wave data were acquired from the global atmospheric reanalysis data set European Centre for Medium-Range Weather Forecasts Re-Analysis Interim (ERA-Interim) and were processed in order to check their quality. Then, the data were subject to a geographical transposition method in order to transfer the wave parameters at a representative water depth of 100 m. Finally, trend analyses have been performed using the nonparametric Mann-Kendall (MK) test and a graphical technique, the Innovative Trend Analysis (ITA), which allows to identify trends in the several values of a series. At annual and seasonal scale, the results deduced from MK test mainly evidenced a slight or null increase of the significant wave height and a relevant increase of the energy period, influencing the magnitude of the wave power by the occurrence of longer waves. Moreover, the ITA method highlights a general increase in the highest values of the involved wave parameters. For the studied area, these aspects have a significant impact on the retreating of the beaches and on the future field installations of wave energy converters (WECs) for electricity purposes.