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
    253020.0839 (4.9)26 (4.2)48 (11)
    100250.2418 (0.87)15 (1.8)23 (1.2)
12 March 2002
    254800.0628 (0.48)22 (0.63)53 (1.7)
    100310.1730 (1.0)14 (2.8)27 (1.1)
20 May 2002
        58870.0555 (2.1)34 (2.6)52 (8.5)
    75810.1141 (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.