TABLE 1.
Upper-ocean properties at Station ALOHA during this studya
| Cruise and depth (m) | Ez (μmol quanta m−2 s−1) | Chlorophyll a (μg liter−1) | 3H-leuL (pmol liter−1 h−1) | 3H-leuD (pmol liter−1 h−1) | 14C-PP (nmol of C liter−1 h−1) |
|---|---|---|---|---|---|
| 20 February 2002 | |||||
| 25 | 302 | 0.08 | 39 (4.9) | 26 (4.2) | 48 (11) |
| 100 | 25 | 0.24 | 18 (0.87) | 15 (1.8) | 23 (1.2) |
| 12 March 2002 | |||||
| 25 | 480 | 0.06 | 28 (0.48) | 22 (0.63) | 53 (1.7) |
| 100 | 31 | 0.17 | 30 (1.0) | 14 (2.8) | 27 (1.1) |
| 20 May 2002 | |||||
| 5 | 887 | 0.05 | 55 (2.1) | 34 (2.6) | 52 (8.5) |
| 75 | 81 | 0.11 | 41 (7.1) | 22 (3.1) | 32 (8.0) |
a
3H-leuL and 3H-leuD are in situ [3H]leucine incorporation from daytime incubations conducted in the light and dark, respectively; 14C-PP, measured rates of photoautotrophic production. Ez, maximum photosynthetically available radiation flux based on measured attenuation coefficients from the noon cast. Numbers in parentheses are standard deviations of measured properties.