Smithsonian miscellaneous collections . years show a beautiful accord. May it not be that duringsome part of the Eocene, lasting millions of years, the unknown forceswhich govern the periodicities in solar variation acted more vigorouslythan in other parts of the Eocene, the Pleistocene, or the Recent ? 25. A Weather Test of the 23-YEAR Hypothesis As stated under caption 9 departures from normal monthly tempera-ture and rainfall and 5-month traveling means therefrom have beencomputed from World Weather Records. These relate to morethan 100 stations in many parts of the world. The departures we
Smithsonian miscellaneous collections . years show a beautiful accord. May it not be that duringsome part of the Eocene, lasting millions of years, the unknown forceswhich govern the periodicities in solar variation acted more vigorouslythan in other parts of the Eocene, the Pleistocene, or the Recent ? 25. A Weather Test of the 23-YEAR Hypothesis As stated under caption 9 departures from normal monthly tempera-ture and rainfall and 5-month traveling means therefrom have beencomputed from World Weather Records. These relate to morethan 100 stations in many parts of the world. The departures weresmoothed by 5-month traveling means in order to eliminate such rapidand abrupt fluctuations as would obscure principal trends. Lack offunds prevents the publication of these valuable data. It follows that should the working hypothesis outlined in caption 17be a true one, then such a series of departures from normal tempera- 76 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 I 3 5 7 9 II 13 15 17 19 21 23 I 3 5 7 9 II 13 15 17 19 21 23. Fig. 32.—Cycles disclosed in varves and tree rings of Eocene age. NO. lO SOLAR RADIATION AND WEATHER STUDIES ABBOT ]] ture or from normal rainfall as just described must show numerousfeatures during any 23-year cycle which would tend more or lessstrongly to be reproduced in each succeeding 23-year cycle. To testthis probability, the data on departures from normals of temperatureand precipitation for all available stations were plotted on sheets ofspecially prepared plotting paper. These sheets were ruled in abscis-sae to represent 276 months or 23 complete years, and in ordinates topresent 300 millimeters, or 30 centimeters. As an illustration, figures 33 and 34 present the percentage precipita-tion of Peoria, III, and the temperature departures of New YorkCity. Features thought to be common in successive 23-year periodsare indicated on the curves by letters. Principal trends are also tobe observed. A dotted continuation of the last line of the
Size: 1256px × 1989px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
