This Modeling Study, 5oN-5oS,

90oW-180o

JGOFS EqPac

5oN-5oS,140oW,

Fall Cruise

JGOFS EqPac

0o, 140oW,

Fall Cruise

Dugdale and Wilkerson (1998)

0o,140oW

physical supply of NO3

(mmol N m-2d-1)

1.83

2.6 (Spring, 92)

Ku et al. (1995)

3.4 (Spring, 92)

Ku et al. (1995)

3.97

physical supply of Si(OH)4

(mmol Si m-2d-1)

0.89

2.1 (Spring, 92)

Ku et al. (1995)

2.6 (Spring, 92)

Ku et al. (1995)

2.36

Primary production

(mmol C m-2d-1)

59

91

Barber et al. (1996)

129

Barber et al. (1996)

76

Uptake of NH4

(mmol N m-2d-1)

6.23

11.82

McCarthy et al. (1996)

15.89

McCarthy et al. (1996)

9.20

Uptake of Si(OH)4

(mmol m-2d-1)

0.87

1.32

Dam et al. (1995)

2.36

Uptake of NO3

(mmol N m-2d-1)

1.84

1.97

McCarthy et al. (1996)

2.62

McCarthy et al. (1996)

2.36

Mesozooplankton predation on microzooplankton

(mmol N m-2d-1)

3.37

3.03 (=40%*7.58)

Dam et al. (1995)

Landry et al. (1995)

4.3 (=40%*10.75)

Dam et al. (1995)

Landry et al. (1995)

0.69

Mesozooplankton grazing on diatoms

(mmol N m-2d-1)

0.87

0.63

Zhang et al. (1995)

0.74

Dam et al. (1995)

2.29

Micozooplankton grazing on small phytoplankton

(mmol N m-2d-1)

7.16

7.58

Landry et al. (1995)

10.75

Landry et al. (1995)

8.28

Specific grazing rate on small phytoplankton

(d-1)

0.46

0.42 (2N-2S)

Landry et al. (1995)

0.38

Landry et al. (1995)

NH4 supplied from microzooplankton

(mmol N m-2d-1)

3.66

4.55

(= 7.58 - 3.03)

6.45

(= 10.75 - 4.3)

8.28

NH4 supplied from mesozooplankton

(mmol N m-2d-1)

2.62

0.79

Zhang et al. (1995)

0.52

Zhang et al. (1995)

0.92

Sinking rate of diatoms

(mmol m-2d-1)

0.08

0.034

Faecal pellet production rate

(mmol N m-2d-1)

0.78(Si)+0.86(N)=1.64

1.07

Roman's data

0.96

Roman's data

2.29(Si)+0.69(N)=2.96

Loss rate to higher trophic level

(mmol N m-2d-1)

0.50

Export production of POSi and PON

(mmol m-2d-1)

0.76(Si)+0.84(N)=1.6

1.56

Murray et al. (1996)

1.52

Murray et al. (1996)

2.36(Si)+0.76(N)=3.12