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An attempt to the approximate figures of seasonal distribution of solar energy reached to and penetrated in the water of the
oceans, as a preliminary step to the estimation of primary production in the oceans from the optical point, was performed
in the Indian Ocean, North Pacific Ocean and Antarctic Ocean on the same lines in the part III. In consequence, the total
amount of solar energy for the year in each depth showed marked differences in each zone of the oceans as illustrated in Fig.
5. By way of example, it could be said that underwater solar energy already came to 33.4 Kg·cal/cm2·year in 10 m deep in the equator of Indian Ocean and was 54% of that, in the Kuroshio region of the North Pacific Ocean,
44% in the Sub-Antarctic zone, 13% in the Antarctic zone and 6% in the Antarctic Convergence zone, respectively.
Besides, on the assumption that a lower limit of the photic zone is marked by the depth here underwater surface solar energy
is reduced to 1% or 5g·cal/cm2·day, the ratio of the total photic zone for the year in unit area of sea surface was approximately 100∶80∶60∶25 or 100∶75∶50∶20
in the equator of the Indian Ocean, Kuroshio region, Sub-Antarctic zone, and Antarctic and Antarctic Convergence zones, respectively. 相似文献
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