Figure 2. A synthesis of temperature observations. A sea surface temperature swath from the NOAA AVHRR satellite [Flament et al., 1996] is cut away to reveal subsurface detail from shipboard and moored observations. The satellite image was taken on August 21, while the ship was a 5 N. To correct for the westward propagation of the wave while we made our way down to the equator, the shipboard and moored data has been transposed to the east at a rate of 0.5 per day from Aug. 21 (Julian day 234, 0000 GMT). The convergent front described by [Yoder et al., 1994] can be seen as the diagonal line in SST, reaching from about 140 W at the equator to 135 W and 5 N. The satellite image is cut away to reveal continuous temperature sections from the surface to ~100 meters depth, generated using an Undulation Oceanographic Recorder (UOR) [Aiken and Bellan, 1990]. Velocity estimates come from shipboard ([Johnson, 1996]; blue vectors) and moored ([Kessler and McPhaden, 1995]; red vectors) acoustic doppler current profiler (ADCP) data. Horizontal velocities only are shown; i.e. all vectors are in planes parallel to the sea surface. For scale, a vector the length of one degree (the squares on the surface) would have a magnitude of 333 cm s^-1. North of the front, the water flows parallel to the front toward the southwest. Just south of the front the water flows into the front, subducting to the northwest. Near the equator, surface water was flowing to the west, with the equatorial undercurrent flowing eastward.