"Climate and Forecast (CF)" . . "tendency of middle atmosphere moles of methyl bromide" . "\"tendency_of_X\" means derivative of X with respect to time. \"middle_atmosphere_moles_of_X\" means the total number of moles of X contained in the troposphere and stratosphere, i.e, summed over that part of the atmospheric column and over the entire globe. The chemical formula of methyl bromide is CH3Br." . . .