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0 apparent decrease from the 56 - 58 zone to the 58 -60 zone is due to the lack of data in that region. The lower diagrams seem to indicate that the number of auroras seen in the northermost region (58 -60) varies relatively little throughout the year, but at lower latitudes during equinoctial periods the belt in which overhead auroras are seen becomes, on the average, broad. Such a study must be supplemented in the future, particularly in the regions to the north of gm lat. 58, by all-sky camera data. d) Sunspot cycle. It has long been suggested that the main belt of auroras contracts during...

45 downwards because (j on the average increases with height; but this conclusion does not follow from (18.3) when the dependency of Kc upon o is taken into consideration. s 2 ERTELl and PRIESTLEY and SWINBANK have shown that the upward eddy- flux of sensible heat must be larger than indicated by (18.3), because this formula does not account for the fact that rising eddies are systematically warmer than sinking eddies because of the effect of buoyancy. The reader is referred to the reviews by SUTTON 22], 23] and PRIESTLEY and SHEP- PARD 15) for further details concerning eddy-flux of heat...

Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfangen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen fur die historische wie auch die disziplingeschichtliche Forschung zur Verfugung, die jeweils im historischen Kontext betrachtet werden mussen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben."