Global Observation-based LInear Vorticity Vertical Velocities (OLIV3) over vertical levels and monthly frequency

Observation-based Linear Vorticity Vertical Velocities (OLIV3) estimates from observation-based geostrophic velocities within the global themocline during the 1993-2019 period at monthly frequency. The beta-plane geostrophic OLIV3 fields are computed following the indefinite depth-integrated geostrophic linear vorticity balance methodology described in Cortés-Morales and Lazar, 2024, Diego Cortés Morales, 2023 [thesis] and Cortés-Morales et al., (submitted) applied to the ARMOR3D [Mulet et al., 2013; https://data.marine.copernicus.eu/product/MULTIOBS_GLO_PHY_TSUV_3D_MYNRT_015_012] geostrophic meridional velocities. The boundary condition used is the Ekman pumping vertical velocities computed from ERA5 wind stress [DOI: 10.24381/cds.f17050d7]. ---------------------------------------------------------------------------------------- Geographical coverage: Global Ocean Grid and horizontal spatial resolution: Evenly spaced 0.25º grid Vertical levels: 50 levels from 0 to 5000 meters depth Temporal resolution: Monthly ----------------------------------------------------------------------------------------- Variables: lon (2D): Longitude lat (2D): Latitude verlev(1D): Vertical level time (1D): Month w_oliv3 (4D): Beta-plane geostrophic vertical velocities基于观测的线性涡度垂直速度（Observation-based Linear Vorticity Vertical Velocities, OLIV3）数据集，其估算结果来源于1993-2019年间全球温跃层内基于观测得到的地转流速，时间分辨率为月度。 β平面地转OLIV3场的计算遵循Cortés-Morales与Lazar（2024）、Diego Cortés Morales（2023年学位论文）以及Cortés-Morales等人（已投稿）所提出的无限深度积分地转线性涡度平衡方法，该方法被应用于ARMOR3D[Mulet等，2013；https://data.marine.copernicus.eu/product/MULTIOBS_GLO_PHY_TSUV_3D_MYNRT_015_012]地转经向流速。本次计算采用的边界条件为基于ERA5风应力计算得到的埃克曼抽吸垂直速度[DOI: 10.24381/cds.f17050d7]。 ---------------------------------------------------------------------------------------- 地理覆盖范围：全球海洋 网格与水平空间分辨率：均匀分布的0.25°网格 垂直层次：共50层，深度范围为0至5000米 时间分辨率：月度 ----------------------------------------------------------------------------------------- 变量列表： lon（二维）：经度 lat（二维）：纬度 verlev（一维）：垂直层次 time（一维）：月份 w_oliv3（四维）：β平面地转垂直速度