"SDN:P07::L4VM90DM" . "2021-09-20 14:41:46.0" . "false" . "1" . "SDN:P07::L4VM90DM" . "SDN:P07::L4VM90DM" . "A velocity is a vector quantity. \"Eastward\" indicates a vector component which is positive when directed eastward (negative westward). Friction velocity is a reference wind velocity derived from the relationship between air density and downward stress and is usually applied at a level close to the surface where stress is assumed to independent of height and approximately proportional to the square of mean velocity."@en . . . "2021-09-20 14:41:46.0" . "eastward_friction_velocity_in_air"@en . . "accepted"@en . "" . . . "1" . .