Votes and proceedings of the General Assembly of the state of New-Jersey . rtion of the carbondioxide change has occurred during the last three decades, the in-crease in global temperatures prior to 1940 can only in part be dueto changes in the concentrations of carbon dioxide and, to a muchlesser extent, water vapor. If this were the only cause of climaticchange, the mean global surface temperature should have risensteadily and smoothly at an increasing rate. It has not and, whatis more, since 1940, temperatures have decreased in spite offurther warming contributions by carbon dioxide content
Votes and proceedings of the General Assembly of the state of New-Jersey . rtion of the carbondioxide change has occurred during the last three decades, the in-crease in global temperatures prior to 1940 can only in part be dueto changes in the concentrations of carbon dioxide and, to a muchlesser extent, water vapor. If this were the only cause of climaticchange, the mean global surface temperature should have risensteadily and smoothly at an increasing rate. It has not and, whatis more, since 1940, temperatures have decreased in spite offurther warming contributions by carbon dioxide content in thatperiod due to mans activities. This indicates that other mechanismsare evidently required to account for part of the warming observedbetween 1880 and 1940, as well as for the cooling observed since1940, and, all in all, that changes in global temperatures cannot besolely attributed to changes in the composition of the atmosphere. 58 / 58/ National Research Council. Committee on Atmospheric and Climate Modification: Problems and Progress, p.
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