Stratospheric eddy diffusion coefficients from tracer data

Global distributions of nitrous oxide, methane, ozone, and carbon 14 are used to estimate four sets of stratospheric eddy diffusion coefficients. A photochemical equilibrium model calculates O(3P), O(1D), H, HO2, OH, H2O2, NO, and NO2 densities, as a function of altitude, latitude, and time. The calculated O(1D), OH, and observed Cl densities are used to obtain the eddy profiles associated with the methane and nitrous oxide distributions, for altitudes between 10 and 40 km. Application of a constant flux condition to the seasonally averaged ozone data yields eddy values below 20 km. Time-dependent carbon 14 calculations produce eddy coefficients between 13 and 27 km. A composite profile is obtained by comparing the four sets of coefficients. Further, carbon 14 computations are used to test these profiles as well as those recommended in reports issued by the National Academy of Sciences in 1976 and 1979. The composite eddy profile produces the best agreement.

[1]  M. Ackerman.  Ultraviolet solar radiation related to mesospheric processes , 2017 .

[2]  A. Ravishankara,et al.  Rate of reaction of OH With HNO3 , 1981 .

[3]  D. Kley,et al.  On the origin of tropospheric ozone , 1980 .

[4]  J. Levine,et al.  The vertical distribution of tropospheric ammonia , 1980 .

[5]  D. Albritton,et al.  Stratospheric CFCl3, CF2Cl2, and N2O height profile measurements at several latitudes , 1980 .

[6]  E. I. Reed,et al.  The stratosphere: Present and future , 1979 .

[7]  O. Serang,et al.  Instantaneous global nitrous oxide photochemical rates , 1979 .

[8]  W. Seiler,et al.  Simultaneously measured vertical profiles of H2, CH4, CO, N2O, CFCl3, and CF2Cl2 in the mid‐latitude stratosphere and troposphere , 1979 .

[9]  M. Sauer,et al.  Negative activation energy for the self-reaction of hydroperoxyl radical in the gas phase. Dimerization of hydroperoxyl radical , 1979 .

[10]  D. Albritton,et al.  Stratospheric measurements of methane at several latitudes , 1978 .

[11]  J. Podolske,et al.  Interpretations of stratospheric photochemistry , 1978 .

[12]  Jennifer A. Logan,et al.  Atmospheric chemistry: response to human influence , 1978, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[13]  J. Vedder,et al.  Stratospheric measurements of CF2Cl2 and N2O , 1978 .

[14]  G. Moortgat,et al.  Mathematical expression for the O (¹D) quantum yields from the O3 photolysis as a function of temperature (230‐320 K) and wavelength (295‐320 nm) , 1978 .

[15]  S. Wofsy.  Temporal and latitudinal variations of stratospheric trace gases - A critical comparison between theory and experiment , 1978 .

[16]  P. Crutzen,et al.  A numerical study of tropospheric photochemistry using a one‐dimensional model , 1977 .

[17]  Harold S. Johnston,et al.  Nitrous oxide ultraviolet absorption spectrum at stratospheric temperatures , 1977 .

[18]  T. L. Thompson,et al.  Stratospheric Nitrous Oxide Altitude Profiles at Various Latitudes , 1977 .

[19]  Ulrich Platt,et al.  OH ‐ Radicals in the lower troposphere , 1976 .

[20]  D. Davis,et al.  Direct measurements of natural tropospheric levels of OH via an aircraft borne tunable dye laser , 1976 .

[21]  G. Whitten,et al.  Use of excess carbon 14 data to calibrate models of stratospheric ozone depletion by supersonic transports , 1976 .

[22]  D. Hunten.  Estimates of stratospheric pollution by an analytic model. , 1975, Proceedings of the National Academy of Sciences of the United States of America.

[23]  D. H.Ehhalt.  Sampling of stratospheric trace constituents , 1974 .

[24]  J. London,et al.  The Interaction of Ozone Photochemistry and Dynamics in the Stratosphere. A Three-dimensional Atmospheric Model , 1974 .

[25]  W. Chameides,et al.  A photochemical theory of tropospheric ozone , 1973 .

[26]  S. Wofsy,et al.  On vertical mixing in the upper stratosphere and lower mesosphere , 1973 .

[27]  D. Hunten,et al.  Production and escape of hydrogen on Mars , 1970 .

[28]  W. Hering,et al.  MEAN DISTRIBUTIONS OF OZONE DENSITY OVER NORTH AMERICA, 1963-1964. , 1965 .

[29]  R. Hudson,et al.  Mass Spectrometry of the HO2 Free Radical , 1962 .

[30]  L. A. Bauer.  The physical theory of the Earth's magnetic and electric phenomena: 2. , 1910 .

[31]  M. Nicolet,et al.  Atmospheric absorption in the O2 Schumann-Runge band spectral range and photodissociation rates in the stratosphere and mesophere , 1980 .

[32]  Steven C. Wofsy,et al.  Interactions of CH4 and Co in the Earth's Atmosphere , 1976 .

[33]  D. Hunten.  Vertical Transport in Atmospheres , 1975 .

[34]  P. Crutzen.  Gas-Phase Nitrogen and Methane Chemistry in the Atmosphere , 1973 .

[35]  H. Dütsch.  Photochemistry Of Atmospheric Ozone , 1971 .

[36]  A. Hindmarsh,et al.  GEAR: ORDINARY DIFFERENTIAL EQUATION SYSTEM SOLVER. , 1971 .