Transactions and proceedings of the New Zealand Institute . uch compressed on the line of advance,and having their pressure always decreasing inward to acentral minimum of an almost circular shape. Their wind-rotation in this hemisphere is from left to right, or in accord-ance with the movements of the hands of a watch. Fig. 5shows the wind and pressure changes caused by the eastward Edwin.—Meteorology of New Zealand. 561 movement of an anticyclone, followed by a cyclone from anorth-westerly direction. Each vertical space represents oneday. Each oval shows a decrease of two-tenths pressuretowa
Transactions and proceedings of the New Zealand Institute . uch compressed on the line of advance,and having their pressure always decreasing inward to acentral minimum of an almost circular shape. Their wind-rotation in this hemisphere is from left to right, or in accord-ance with the movements of the hands of a watch. Fig. 5shows the wind and pressure changes caused by the eastward Edwin.—Meteorology of New Zealand. 561 movement of an anticyclone, followed by a cyclone from anorth-westerly direction. Each vertical space represents oneday. Each oval shows a decrease of two-tenths pressuretoward the central one. The small arrows indicate the wind-rotation ; the long feathered arrow on the left shows that thecyclone is travelling towards south-east, and the one on theright that the anticyclone is progressing eastwards. The left-hand side or rear part of the high pressure is shown slightlyindented as the effect of the approaching cyclone, whose frontcurves are compacted in the line of its advance. Cyclone and Anticyclone (Southern Hemisphere).. Using three positions—viz., a, b, and c—situated upon aline from north-east to south-west, the diagram shows thatthe movement of the high pressure to the eastward has causeda decrease of pressure accompanied by northerly winds ateach station, and that as the cyclone approaches pressurecontinues to decrease, and has at a fallen to 2990, windabout north-north-east ; at b to 29-85, wind north-north-east ;and at c to 29-90, wind north-east. The continued advanceof the cyclone causes further changes; at a the decrease is to29-60, wind north-west; at c the wind has changed fromnorth-east through east to south-east, and pressure hasfallen to 29-40. The minimum pressure of the cyclone isnow at its nearest to both of these positions, but at b, whichlies directly in the track of the cyclone centre, pressurehas fallen rapidly to 29-05, and the wind, which remainedat about north-east, varies rapidly from all directions whilethe centr
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1904
