WANE4

WANE4 Website (Oceanweather Inc.) Summary WANE4 is a long term hindcast of continuous wind and wave climatology for the West Africa coastline from Guinea to Namibia. This new hindcast takes advantage of advances in atmospheric forcing, wave modeling, and application of the extensive array of in-situ and satellite-based wind and wave observations available in the basin. WANE4 builds on Oceanweather’s (OWI) long history of producing detailed metocean hindcasts for the West Africa domain, succeeding the WAX JIP and the WANE, WANE2 and WANE3 hindcasts. Extreme waves in the study area are associated with swell propagated from two primary types of storms: deep Southern Ocean migratory extratropical cyclones (southwest swell events) and episodic enhancements of the southeast trade winds (southeasters) which are a quasi-permanent feature of the atmospheric circulation offshore West Africa south of 10° S. Swells generated from Northern Hemisphere extratropical and tropical systems also impact exposed locations inthe study domain. The continuous hindcast includes detailed reanalysis of swell and local storm winds for application in the WANE4 wave models. Global wave modeling is nested down to coastal grids at ~ 9 km and ~ 4.7 km resolution. These are the same grids applied in the WANE3 hindcast, but with more advanced wind forcing/methodology and new wave model setup. The hindcast provides an extensive dataset of hourly wind and wave fields, including swell train partitioning and JONSWAP fits, as well as directional wave spectra. Project Highlights Archive Time Step 1 Hour Hindcast Dates Continuous: 1/1/1979 to 12/31/2024 Variables Wind, Bulk Wave and Spectra Spatial Resolution $\frac{1}{12}^{\circ}$ & $\frac{1}{24}^{\circ}$ Regional Extent West Africa: 29.7° S to 14° N, 18.7° W to 17° E Meteorological Forcing ERA5 Wind + Bias Adj. Boundary Conditions ERA5 Wave Spectra + Bias Adj. Previous Versions WAX, WANE, WASP, WANE2, and WANE3WANE4 官方网站（Oceanweather Inc.） ## 数据集概述 WANE4是一套针对西非海岸线（几内亚至纳米比亚段）的长期连续风场与波浪气候学后报数据集。本次后报数据集依托大气强迫、波浪建模领域的技术突破，并充分利用了该海域内海量的原位（in-situ）观测与星载风、波浪观测资源。WANE4继承了Oceanweather（OWI）在西非海域开展精细化海洋气象后报的长期技术积淀，其前身为WAX联合工业项目（JIP）以及WANE、WANE2、WANE3系列后报数据集。 研究区域内的极端波浪主要由两类风暴衍生的涌浪驱动：一是源自南大洋深层的移动性温带气旋（西南涌浪事件），二是东南信风的阶段性增强（东南向风）——该现象是南纬10°以西海面上西非近海大气环流的准永久性特征。此外，源自北半球温带与热带系统的涌浪同样会对研究区域内的暴露岸段造成影响。 本连续后报数据集包含针对WANE4波浪模型的涌浪与局地风暴风场精细化再分析数据。全球波浪模型通过嵌套得到分辨率约为9km与4.7km的近岸计算网格，该网格与WANE3后报数据集所使用的计算网格一致，但采用了更先进的风强迫方案与建模方法，以及全新的波浪模型配置。本次后报提供了覆盖全时段的逐小时风场与波浪场数据集，包含涌浪序列划分、JONSWAP谱拟合结果以及方向波谱数据。 ## 项目亮点 - 存档时间步长：1小时 - 后报时段：连续覆盖1979年1月1日至2024年12月31日 - 变量类型：风场、整体波浪参数与波谱 - 空间分辨率：1/12°与1/24° - 研究区域范围：西非海域，南纬29.7°至北纬14°，西经18.7°至东经17° - 气象强迫数据：ERA5风场+偏差校正 - 边界条件：ERA5波谱+偏差校正 - 前代版本：WAX、WANE、WASP、WANE2与WANE3