Global Observation-based LInear Vorticity Vertical Velocities (OLIV3) over isopycnal levels

Observation-based Linear Vorticity Vertical Velocities (OLIV3) estimates from observation-based geostrophic velocities within the global themocline during the 1993-2019 period at annual 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]. The velocity field is quality-flagged based on the relative error and interannual correlation coefficient between w_g and w_tot in an OGCM perfect model test (Cortés-Morales et al., (submitted)). ---------------------------------------------------------------------------------------- Geographical coverage: Global Ocean Grid and horizontal spatial resolution: Evenly spaced 0.25º grid Vertical levels: 71 levels from sigma level 21 to 28.17 kg/m^3. Temporal resolution: Annual (1993-2019) ----------------------------------------------------------------------------------------- Variables: lon (2D): Longitude lat (2D): Latitude isolev (1D): Isopycnal level time (1D): Year w_oliv3(4D): Beta-plane geostrophic vertical velocities h_depth (4D): Depth isopycnal surfaces flag_time_var (3D): Flag based on correlation coeffcient between geostrophic and total vertical velocties from OGCM flag_time_mean (3D): flag based on relative error between geostrophic and total vertical velocties from OGCM