Discovery reports (1942) Discovery reports discoveryreports21inst Year: 1942 3i8 DISCOVERY REPORTS autumnal maximum is probably even more variable. Some of our earlier work, and observations in the adjacent waters of the Scotia Sea, suggests that in some years it may take place as late as April or even May, and that sometimes it is hardly apparent at all. Wherever the seasonal cycle has been studied intensively in temperate—polar waters, Z5000 20000-— 15000 10000 5000- Julu August September October November December January FebruarLj March April Mai June Fig. 13. South Georgia area. Seaso
Discovery reports (1942) Discovery reports discoveryreports21inst Year: 1942 3i8 DISCOVERY REPORTS autumnal maximum is probably even more variable. Some of our earlier work, and observations in the adjacent waters of the Scotia Sea, suggests that in some years it may take place as late as April or even May, and that sometimes it is hardly apparent at all. Wherever the seasonal cycle has been studied intensively in temperate—polar waters, Z5000 20000-— 15000 10000 5000- Julu August September October November December January FebruarLj March April Mai June Fig. 13. South Georgia area. Seasonal variations in plant pigments per m.', means of 50-0 m. hauls at mean dates. Numbers of observations shown in brackets. Note scale is necessarily much smaller than that used for oceanic regions and for the Scotia Sea. = 1933-4. 0 = i934~S- • = 1937' Table 8 No. of Mean units Mean P mg. Mean Si mg. Mean date Station nos. obser- of pigments atoms atoms vations per m. 50-0 m. 50-0 m. 29. viii. 34 1394-1406 12 120 2-30 30-1 5- X- 34 1437 I 380 — — 13. X. 36 1839-1842 4 230 2-13 36-8 27. X. 36 I843-1855 12 4,980 1-84 27-1 I. xn. 33 1199-1211 12 26,820 2-03 II-8 II. xii. 36 i92ci939 40 11,360 I-OI 3-2 27- '• 35 I496-I499 4 2,380 1-43 i6-o 6. ii. 35 1501-1508 8 1,170 1-46 II'O 6. iii. 37 1977-1988 II 6,130 1-37 6-7 9. IV. 34 1340 I 780 — —
Size: 1635px × 1223px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
