The export flux of particulate organic carbon and particle scavenging rates were calculated using a super(234)Th-based approach along a transect through the Mid-Atlantic from 35 degree S to 10 degree N during May and June of 1996. The median residence time of dissolved super(234)Th along the transect was 135 days, with intense scavenging from 5 degree N to 6 degree N (\s?\tau\s?\ sub(d) = 86 plus or minus 17 days). Vertical profiles and depth-integrated samples (surface-100 m) of dissolved (53-\s?\mu\s?\m) super(234)Th activities were collected to estimate export fluxes of particulate organic carbon (POC). A steady-state model of the super(234)Th activity balance in the upper 100 m was combined with measurements of the POC super(234)Th ratio on > 53-\s?\mu\s?\m particles. POC export ranged from 3.2 mmol C m super(2) d super(1) in the central South Atlantic to 43 mmol C m super(2) d super(1) at 2.5 degree S. Export production along the Atlantic equator (5 degree S-5 degree N, 25 degree E-5 degree W) is estimated to be 0.29 Gt C yr super(1). The super(234)Th-derived POC export estimates reported here and from other studies are comparable with model simulations of export production from the Princeton General Circulation Model (GCM) for the Atlantic Ocean.