Archive image from page 763 of The depths of the ocean. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceangen00murr Year: 1912 7IO DEPTHS OF THE OCEAN interest attaches to the fact that the immigra- into Norwe rapidly and the lower temperatures gradually descend towards deep water during early spring and summer. Great changes in specific gravity, viscosity, and light-intensity accompany these changes in temperature ; in the very magnitude of these
Archive image from page 763 of The depths of the ocean. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceangen00murr Year: 1912 7IO DEPTHS OF THE OCEAN interest attaches to the fact that the immigra- into Norwe rapidly and the lower temperatures gradually descend towards deep water during early spring and summer. Great changes in specific gravity, viscosity, and light-intensity accompany these changes in temperature ; in the very magnitude of these changes we must look for the essential difference between the tropical and subtropical conditions on the one hand, and the arctic-boreal conditions on the other. The greatest tion of Atlantic forms season when the condi- tions in the latter are most similar to those of the Atlantic. The in- ternational investiga- tions have contributed to our knowledge on this immigration. Schmidt, for instance, in the Danish investiga- tion-steamer ' Thor,' had the opportunity of studying the immigra- tion of Salpae from the Atlantic into the Nor- wegian Sea, and writes as follows :— ' The organisms concerned were the dis- tinctly Atlantic Salpse (especially Salpa fusi- fornns), which are so characteristic and which were taken often in hundredweights in each haul of our pelagic apparatus in the Atlantic beyond the looo-metres line. The year 1905, during which we several times crossed the North Sea, made two cruises to and from Iceland and the Faroes, following approximately the looo-metres line, then sailed southwards west of the British Isles to the Bay of Biscay, was thus specially well suited to give light on these conditions, as I have endeavoured to delineate on the accom- panying Chart [reproduced in Fig. 510]. The shaded lines 1 Jobs. Schmidt, 'The Distribution of the Pelagic Fry and the Spawning Regions of the Gadoids,' etc., Rapports et proces verbatix dii Conseil International, vo
Size: 1234px × 1621px
Photo credit: © Actep Burstov / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1900, 1910, 1912, _michael_sars_north_atlantic_deep_sea_expedition_191, appell_f_jakob_johan_adolf_1857_, archive, book, bookauthor, bookcentury, bookdecade, bookpublisher, booksubject, bookyear, drawing, gran_h_h_haakon_hasberg_1870_, helland_hansen_bj_rn_1877_, historical, history, illustration, image, london_macmillan, murray_john_sir_1841_1914, north_atlantic_ocean, oceanography, page, picture, print, reference, vintage
