Mean Significant Wave Height, Amplitude of the its Annual Cycle and Mean Wave Energy Flux from Jason-1 and -2 (2001-2016)

this dataset contains the results of the accepted nature communications manuscript entitled "global coastal attenuation of wind-waves observed with radar altimetry", with the following abstract:coastal studies of wave climate and evaluations of wave energy resources are mainly regional and based on the use of computationally very expensive models or a network of in-situ data. considering the significant wave height, satellite radar altimetry provides an established global and relatively long-term source, whose coastal data are nevertheless typically flagged as unreliable within 30 km of the coast. this study exploits the reprocessing of the radar altimetry signals with a dedicated fitting algorithm to retrieve several years of significant wave height records in the coastal zone. we show significant variations in annual cycle amplitudes and mean state in the last 30 km from the coastline compared to offshore, in areas which were up to now not observable with standard radar altimetry. consequently, a decrease of the average wave energy flux is observed. globally, we found that the mean significant wave height at 3 km off the coast is on average 22% smaller than offshore, the amplitude of the annual cycle is reduced on average by 14% and the mean energy flux loses 38% of its offshore value.

本数据集收录了《自然通讯》杂志接受发表的手稿“全球海岸线风浪衰减的雷达测高观测”的研究成果，摘要如下：海岸线波浪气候研究及波浪能源资源评估主要局限于区域范围内，依赖于计算成本高昂的模型或现场数据网络。考虑到显著波高，卫星雷达测高技术提供了一种公认的全球且相对长期的数据来源，但其海岸数据通常在距海岸线30公里范围内被标记为不可靠。本研究利用专用拟合算法对雷达测高信号进行重新处理，以获取沿海区域数年的显著波高记录。我们发现在离岸30公里范围内与离岸地区相比，年度周期振幅和平均状态存在显著差异，这些区域在以往的标准雷达测高技术中无法观测。因此，观察到平均波浪能量通量有所下降。全球范围内，我们发现距海岸线3公里的平均显著波高比离岸地区平均小22%，年度周期振幅平均降低了14%，平均能量通量相对于离岸值损失了38%。