covariance_over_longitude_of_eastward_wind_and_northward_wind m2 s-2 [SQM2] These are the eddy momentum flux counterparts to the eddy heat flux described by the existing standard name covariance_over_longitude_of_northward_wind_and_air_temperature with units of K m s-1. They are proposed for use by the QUOCA project.
Change Date: 21 Feb 2025, 4:56 p.m.
covariance_over_longitude_of_eastward_wind_and_northward_wind m2 s-2 [SQM2] Covariance refers to the sample covariance rather than the population covariance. The quantity with standard name covariance_over_longitude_of_eastward_wind_and_northward_wind is the covariance of the deviations of zonal and meridional air velocity about their respective zonal mean values. The data variable must be accompanied by a vertical coordinate variable or scalar coordinate variable and is calculated on an isosurface of that vertical coordinate. "Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name "upward_air_velocity").