. Carbon and the biosphere; proceedings of the 24th Brookhaven symposium in biology, Upton, , May 16-18, 1972. Carbon cycle (Biogeochemistry). 150 EHHALT 50 40 30 E 20 10. i—i—r A , Rocket flight, September 1968, White Sands, N. Mex. + , Balloon flight, July 1967, Palestine, Tex. , Tropopause Average Scottsbluff profile- I I I I i_J I L J ! L J_ I I l I CH4 MIXING RATIO, ppM Fig. 1 Vertical profile of the CH4 volume mixing ratio in the stratosphere. The balloon data18 are supplemented by the results of a rocket flight which collected an integrated sample at altitudes betwee
. Carbon and the biosphere; proceedings of the 24th Brookhaven symposium in biology, Upton, , May 16-18, 1972. Carbon cycle (Biogeochemistry). 150 EHHALT 50 40 30 E 20 10. i—i—r A , Rocket flight, September 1968, White Sands, N. Mex. + , Balloon flight, July 1967, Palestine, Tex. , Tropopause Average Scottsbluff profile- I I I I i_J I L J ! L J_ I I l I CH4 MIXING RATIO, ppM Fig. 1 Vertical profile of the CH4 volume mixing ratio in the stratosphere. The balloon data18 are supplemented by the results of a rocket flight which collected an integrated sample at altitudes between 44 and 62 km. The weighted mean altitude1 6 of this sample is 50 km. about 30 N. The horizontal flow of this meridional circulation is so slow that the air spends about a year in the stratosphere, enough time to react the CH4. 1 4 Thus practically all CH4 entering with the air, X 10 g/year, is destroyed. The other loss of CH4 to the stratosphere is by upward diffusion driven by the CH4 gradient in the stratosphere (Fig. 1). The vertical diffusion flux is J 3M 3z -PKz^r where p is the density, Kz is the vertical eddy-diffusion coefficient, and 3M/3z i the vertical gradient of the CH4 mixing ratio at the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brookhaven National Laboratory; Woodwell, G. M; Pecan, Erene V. [Washington] Technical Information Center, U. S. Atomic Energy Commission; [available from National Technical Information Service, Springfield, Va. ]
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