The Recalculation of Marine Chlorophyll Concentrations with Special Reference to Australian Waters

1978 ◽  
Vol 29 (4) ◽  
pp. 409 ◽  
Keyword(s):  
Special Reference ◽  
Chlorophyll A ◽  
Marine Algae ◽  
Productivity Index ◽  
The South ◽  
West Pacific ◽  
East Indian ◽  
West Pacific Ocean ◽  
South West ◽  
Chlorophyll Concentrations

Matrices are developed in order to convert published chlorophyll concentrations to values which would have been obtained had correct spectrophotometric equations been used. The main result is to decrease chlorophyll a values by as much as 23 % and chlorophyll a values by as much as 78 %. Corrected average values are given for the South-East Indian and South-West Pacific Oceans. Corrected values are given of the productivity index of several regions in the South-West Pacific Ocean. Some published values for the chlorophyll content of marine algae are corrected.

The concentration of chlorophylls a and c in the South-West Pacific Ocean

1970 ◽  
Vol 21 (1) ◽  
pp. 1 ◽  
Author(s):  
GF Humphrey
Keyword(s):  
Pacific Ocean ◽  
Water Column ◽  
Chlorophyll A ◽  
The South ◽  
Average Amount ◽  
West Pacific ◽  
West Pacific Ocean ◽  
South West

Samples were collected in 1958-67 usually at 0, 25, 50, 75, 100, and 150 m and in the region between 125� E. and 160�W., and 20�N. and 50� s. At 0 m (and 150 m) the regional average for chlorophyll a was 0.11 (and 0.09) �g/l. in summer and 0.24 (and 0.11) �g/l, in winter; for chlorophyll c the values were 0.21 (and 0.23) �g/l. in summer and 0.13 (and 0.15) �g/l. in winter. Most samples had chlorophyll c/a ratios between 1 and 2. The average amount of chlorophyll a in the water column down to 150 m was 24 mg/m2 in summer and 35 in winter; for chlorophyll c the values were 41 and 26 mg/m2. At most stations the maximum amounts of chlorophyll were at 100 m, except for chlorophyll a in summer when this depth was 75 m.

Some Features of Organic Phosphorus Distribution in the South-East Indian and South-West Pacific Oceans

1963 ◽  
Vol 14 (2) ◽  
pp. 119 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Organic Phosphorus ◽  
North Equatorial Current ◽  
The South ◽  
Southern Boundary ◽  
West Pacific ◽  
East Indian ◽  
South West ◽  
Equatorial Current ◽  
The Antarctic ◽  
Counter Current

Concentrations of organic phosphorus significantly different from zero (0.10-0.38 �g-atom/l) have been found at most depths in a series of stations in the south-east Indian and south-west Pacific Oceans. For three meridional sections of the central and west Pacific and east Indian Oceans mean concentrations of organic phosphorus in the 0-200 m layer were found to be maximal (0.20-0.38�g- atom/l) along the southern boundary of the South Equatorial Current, along the Equatorial Divergence, and within the boundary of the Counter Current and North Equatorial Current. South of 30�S. to about 40�S. another maximum was found which could not be associated with marked current movements. Pronounced maxima were also found in the vertical profiles of organic phosphorus. These sometimes occurred at the same depth as major hydrological core layers. The most consistent agreement in depth was found between the Antarctic intermediate salinity minimum and an intermediate depth organic phosphorus maximum around 1000 m. At 41% of stations examined these two layers were found at the same depth. At several locations the depths of the maxima in organic phosphorus varied in the same direction and at the same rate as the major hydrological layers during one year's observations.

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