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. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. OBSERVATIONS IN THE SCOTIA SEA 319 the autumnal secondary increase appears to show this irregularity (cp. Harvey et al. 1935, p. 439). It would appear to be far more dependent upon prevailing weather con- ditions than the main increase. Before leaving the South Georgia area it may be mentioned that in the exceptional spring of 1930-1, when pack-ice actually extended some way to the north-east of the island, Phaeocystis was found in moderate quantity in the ice. It has not been observed there on

. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. OBSERVATIONS IN THE SCOTIA SEA 319 the autumnal secondary increase appears to show this irregularity (cp. Harvey et al. 1935, p. 439). It would appear to be far more dependent upon prevailing weather con- ditions than the main increase. Before leaving the South Georgia area it may be mentioned that in the exceptional spring of 1930-1, when pack-ice actually extended some way to the north-east of the island, Phaeocystis was found in moderate quantity in the ice. It has not been observed there on  Stock Photo
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Paul Fearn / Alamy Stock Photo

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RCDWGC

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7.1 MB (95.2 KB Compressed download)

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1645 x 1519 px | 27.9 x 25.7 cm | 11 x 10.1 inches | 150dpi

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. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. OBSERVATIONS IN THE SCOTIA SEA 319 the autumnal secondary increase appears to show this irregularity (cp. Harvey et al. 1935, p. 439). It would appear to be far more dependent upon prevailing weather con- ditions than the main increase. Before leaving the South Georgia area it may be mentioned that in the exceptional spring of 1930-1, when pack-ice actually extended some way to the north-east of the island, Phaeocystis was found in moderate quantity in the ice. It has not been observed there on other occasions, but may be expected in small quantities whenever the pack gets so unusually far north. The Chlorophycean Halosphaera viridis was recorded by Hardy in enormous numbers, but from three stations only and from subsequent work it would seem to be so local that it can hardly be considered a regular constituent of the phytoplankton. THE SCOTIA SEA Eighty-nine estimations of pigment content are available from this area; they were obtained in different seasons, but being fairly well distributed over the whole of the productive period appear to give a good idea of the probable seasonal cycle. The relevant figures are given in Table 9, and are also plotted in Fig. 14. It must again be noted that the graph has had to be constructed on a smaller scale than that used for the oceanic Northern Region, but larger than that used for the South Georgia area. 5000 4000— 3Q0O 2000. 1000— JuIlj August September October NovemberDecember January Februarq March April MaL| June Fig. 14. Scotia Sea. Seasonal variation in plant pigments per m.^, means of available observations at mean dates. Numbers of observations in brackets. Note necessarily smaller scale than that used for oceanic regions. 8-2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectl

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