CFOSAT/SWIM L2 2022 dataset

This study analyzed the wave spectrum data of the L2 level at a 10 ° incidence angle of the China France Oceanography Satellite Spectrometer in 2022 on a global scale. To ensure the reliability of experimental data, first, remove outliers and screen out pure sea surfaces without rain or land mask values; And obtain the wave observation unit (i.e. "box", hereinafter referred to as "wave cell") with all data parameters within the confidence interval; Secondly, in order to reduce the impact of spurious peaks in the measured data, boxes with effective wave heights greater than 1.2 meters and spectral peak wave numbers greater than 0.001 rad/m were selected. To facilitate comparison with the above spectra, wave elements with a difference of no more than 0.001 rad/m between the peak wave number and the wave number corresponding to the maximum spectral value were selected. Finally, a total of 119359 boxes were preliminarily selected based on the wind speed distribution. This study selected three types of inverse wave age ranges and corresponding wave steepness to classify the sea state of measured data: the average spectrum composed of measured data with the inverse wave age range of 0.8~0.9 represents fully developed wind waves; The average spectrum composed of measured data with a reverse wave age range of 0.9~1.1 characterizes mature wind waves; The average spectrum composed of measured data with inverse wave age<0.8 characterizes swells. Perform feature statistics on the corresponding wave parameters, compare and analyze the classified measured data with the Apel spectrum, Elfouhaily spectrum, and Goda spectrum, and obtain a comparison chart for this dataset.

本研究针对2022年中法海洋卫星光谱仪（China France Oceanography Satellite Spectrometer）L2级10°入射角下的全球尺度波谱数据展开分析。为保障实验数据可靠性，首先剔除异常值并筛选出无降雨、无陆地掩膜值的纯海面区域；同时提取所有数据参数均处于置信区间内的波浪观测单元（即“格点”，下文简称“波元”）。其次，为削弱实测数据中虚假峰值的影响，选取有效波高大于1.2米且谱峰波数大于0.001 rad/m的格点。为便于与上述谱数据对比，选取峰波数与谱峰值对应波数差值不超过0.001 rad/m的波浪要素。最终基于风速分布初步筛选出共计119359个格点。本研究选取三类逆波龄区间及对应波陡等级，对实测数据的海况进行分类：逆波龄区间为0.8~0.9的实测数据构成的平均谱，代表充分成长风浪；逆波龄区间为0.9~1.1的实测数据构成的平均谱，表征成熟风浪；逆波龄<0.8的实测数据构成的平均谱，则代表涌浪。对相应波浪参数进行特征统计，将分类后的实测数据与Apel谱（Apel spectrum）、Elfouhaily谱（Elfouhaily spectrum）及Goda谱（Goda spectrum）开展对比分析，最终得到本数据集对应的对比图谱。

搜集汇总

背景与挑战

背景概述

该数据集为2022年全球范围内的CFOSAT/SWIM L2级波浪谱数据，经过严格筛选和分类，包含119359个波浪单元，并用于与多种波浪谱模型进行比较分析。