TY - JOUR

T1 - Estimates of turbulent diffusivities and energy dissipation rates from satellite measurements of spectra of stratospheric refractivity perturbations

AU - Gavrilov, N.M.

PY - 2013

Y1 - 2013

N2 - Approaches for estimations of effective turbulent diffusion and energetic parameters from characteristics of anisotropic and isotropic spectra of perturbations of atmospheric refractivity, density and temperature are developed. The approaches are applied to the data obtained with the GOMOS instrument for measurements of stellar scintillations on-board the Envisat satellite to estimate turbulent Thorpe scales, LT , diffusivities, K, and energy dissipation rates,E, in the stratosphere. At low latitudes, effective values are LT ~ 1–1.1 m, E ~ (1.8–2.4)×10−5 W/kg, and K ~ (1.2–1.6)×10−2 m2/s at altitudes of 30–45 km in September–November 2004, depending on different assumed values of parameters of anisotropic and isotropic spectra. Respective standard deviations of individual values, including all kinds of variability, are dLT ~ 0.6–0.7 m, E ~ (2.3–3.5)×10−5 W/kg, and K ~ (1.7–2.6)×10−2 m2/s. These values correspond to high-resolution balloon measurements of turbulent characteristics in the stratosphere, and to p

AB - Approaches for estimations of effective turbulent diffusion and energetic parameters from characteristics of anisotropic and isotropic spectra of perturbations of atmospheric refractivity, density and temperature are developed. The approaches are applied to the data obtained with the GOMOS instrument for measurements of stellar scintillations on-board the Envisat satellite to estimate turbulent Thorpe scales, LT , diffusivities, K, and energy dissipation rates,E, in the stratosphere. At low latitudes, effective values are LT ~ 1–1.1 m, E ~ (1.8–2.4)×10−5 W/kg, and K ~ (1.2–1.6)×10−2 m2/s at altitudes of 30–45 km in September–November 2004, depending on different assumed values of parameters of anisotropic and isotropic spectra. Respective standard deviations of individual values, including all kinds of variability, are dLT ~ 0.6–0.7 m, E ~ (2.3–3.5)×10−5 W/kg, and K ~ (1.7–2.6)×10−2 m2/s. These values correspond to high-resolution balloon measurements of turbulent characteristics in the stratosphere, and to p

U2 - 10.5194/acp-13-12107-2013

DO - 10.5194/acp-13-12107-2013

M3 - Article

VL - 13

SP - 12107

EP - 12116

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 23

ER -