Figure 4. Sections of (a) chlorophyll (from fluorescence), (b) oyxgen, and (c) pCO₂ from 1 to 3 N, with overlays of temperature contours from UOR. Chlorophyll data come from UOR [Aiken and Bellan, 1990] and underway sampling [Balch and Kilpatrick, 1996]. A subsurface maximum is seen across the entire section, with greatest intensity at around 1 N. The 1 N maximum was also detected in the continuous underway chlorophyll determinations at the sea surface, but was missed entirely by the CTD profiles. Oxygen data (b) come from UOR [Aiken and Bellan, 1990] and CTD section. pCO₂ data come from CTD section [Archer et al., 1996] and continuous underway determinations [Goyet and Peltzer, submitted].