Sentences with phrase «accurate atmospheric measurement»
Accurate atmospheric measurement of human - emitted greenhouse gases, such as carbon dioxide, methane, nitrous oxide, and the chlorofluorocarbons, have been made for decades.
http://ossfoundation.us/ Not exact matches
Today we have more accurate series for atmospheric d13C changes than tree rings: ice cores, firn air and direct measurements give a smooth (be it filtered ~ 8 years) indication of historical d13C levels.
post 1960 when more accurate measurements of atmospheric CO2 were being made....
1950s: Research on military applications of radar and infrared radiation promotes advances in radiative transfer theory and measurements = > Radiation math — Studies conducted largely for military applications give accurate values of infrared absorption by gases = > CO2 greenhouse — Nuclear physicists and chemists develop Carbon - 14 analysis, useful for dating ancient climate changes = > Carbon dates, for detecting carbon from fossil fuels in the atmosphere, and for measuring the rate of ocean turnover = > CO2 greenhouse — Development of digital computers affects many fields including the calculation of radiation transfer in the atmosphere = > Radiation math, and makes it possible to model weather processes = > Models (GCMs)-- Geological studies of polar wandering help provoke Ewing - Donn model of ice ages = > Simple models — Improvements in infrared instrumentation (mainly for industrial processes) allow very precise measurements of atmospheric CO2 = > CO2 greenhouse.