. "'tendency_of_X' means derivative of X with respect to time. 'Eastward' indicates a vector component which is positive when directed eastward (negative westward). 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.)"@en . "" . . . . "SDN:P07::CFSN0181" . "false" . . "SDN:P07::CFSN0181" . . "accepted"@en . . "2006-09-26 18:12:43.0" . . "2006-09-26 18:12:43.0" . . "1" . "SDN:P07::CFSN0181" . "1" . "tendency_of_eastward_wind"@en .