. Scientific investigations . he ocean. But as we passup the English Channel the range steadily increases; and withinthe North Sea, as we pass from the Shetland region to the GermanBight, we see the annual range gradually increasing from about 6°to at least 14° C. On the other side of the ocean, from Newfoundland to theAmerican coast, we have a still more marked increase of seasonalrange. In the neighbourhood of the peninsula of Gaspe our chartshows a range of about 16 C, but it may well be greater in theseshallower waters, to which our sources of information do not steady increase
. Scientific investigations . he ocean. But as we passup the English Channel the range steadily increases; and withinthe North Sea, as we pass from the Shetland region to the GermanBight, we see the annual range gradually increasing from about 6°to at least 14° C. On the other side of the ocean, from Newfoundland to theAmerican coast, we have a still more marked increase of seasonalrange. In the neighbourhood of the peninsula of Gaspe our chartshows a range of about 16 C, but it may well be greater in theseshallower waters, to which our sources of information do not steady increase of temperature-range in this part of the ocean,just where in our former map we saw the close-packed isothermsof mean temperature, is doubtless connected with a tendency forthe two opposing currents, cold and hot, to vary in magnitude orforce with the seasons of the year, and more or less to shift theirrelative positions accordingly. In short, we are probably hereobserving a somewhat mixed phenomenon, consisting in part of a. On the Surface Temperature of North Sea and North Atlantic. 19 true seasonal fluctuation of temperature, and in part of a tendencyfor the actual body of water present in a given place to changeplaces with another, characterised by very different temperaturephenomena. Some minor features in this map are not very easy to instance, there is good evidence that in a large patch of waterlying between Spain and the Canaries, the range of temperatureis a full degree centigrade greater than that of the waters whichsurround it; but the cause of these increased amplitudes is notobvious. It will be seen that the lowest range represented anywhere uponour map is 4° C, which is shown as occurring in a large mass ofwater southward of Iceland, and extending north of Faeroe into theNorwegian Sea. Our data for this region are somewhat scanty,and it is probable that the actual phenomena are much morecomplicated than as they are represented in our chart. I
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