Special Issue: Dynamics and Structure of the Mesopause Region (DYSMER)
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Observed “long-term” temperature change in a midlatitude mesopause region in response to external perturbations
Earth, Planets and Space volume 51, pages 809–814 (1999)
Abstract
Analysis of seven years (1990–1997) of measured temperature profiles in the mesopause region (84 to 102 km) at Fort Collins, CO (41°N, 105°W), shows that, after removing seasonal variations, there was an episoidic temperature excursion with an amplitude ranging from 7 K to 14 K. Observable increases began in 1992, maximum temperatures occurred during the first half of 1993, and the excursion was over by about 1996. Since this excursion followed the Mount Pinatubo eruption by a time scale consistent with published model simulations of the effect of stratospheric aerosol on the mesopause region, we attribute the temperature excursion to that eruption. In addition the data is consistent with a background cooling of roughly 1 K per year, most of which may be attributable to variability in the solar flux. Continued observation towards the coming solar maximum promises to quantify (assess) the “long-term” change in mesopause temperatures resulting from solar variability (anthropogenic effect).
References
Barnes, J. E. and D. J. Hofmann, Lidar measurements of stratospheric aerosol over Mauna Loa Observatory, Geophys. Res. Lett., 24, 1923–1926, 1997.
Brasseur, G. and C. Granier, Mount Pinatubo aerosols, chlorofluorocarbons, and ozone depletion, Science, 257, 1239–1242, 1992.
Brasseur, G. and M. H. Hitchman, Stratospheric response to trace gas perturbations: changes in ozone and temperature distribution, Science, 240, 634–637, 1988.
Callis, L. B., R. E. Bougher, and J. D. Lambeth, The stratosphere: climatologies of the radiative heating and cooling rates and the diabatically diagnosed net circulation fields, J. Geophys. Res., 92, 5585–5607, 1987.
Clancy, R. T. and D. W. Rusch, Climatology and trends of mesospheric (58–90 km) temperatures based upon 1982–1986 SME scattering profiles, J. Geophys. Res., 94, 3,377–3,393, 1989.
Fricke, K. H. and U. von Zahn, Mesopause temperatures derived from probing the hyperfine structure of the D2 resonance line of sodium by lidar, J. Atmos. Terr. Phys., 47, 499–512, 1985.
Garcia, R. S., S. Solomon, R. G. Roble, and D. W. Rush, Numerical response of the middle atmosphere to the 11-year solar cycle, Planet. Space Sci., 32, 411–423, 1984.
Huang, T. Y. W. and G. P. Brasseur, Effect of long-term solar variability in a two-dimensional interactive model of the middle atmosphere, J. Geophys. Res., 98, 20,413–20,427, 1993.
Keckhut, P., A. Hauchecorne, and M. L. Chanin, Midlatitude long-term variability of the middle atmosphere: Trends and cyclic and episodic changes, J. Geophys. Res., 100, 18,887–18,897, 1995.
Labitzke, K. and M. P. McCormick, Stratospheric temperature increases due to Pinatubo aerosols, Geophys. Res. Lett., 19, 207–210, 1992.
Lastoviska, J., D. Buresova, and J. Boska, Does QBO and the Mt. Pinatubo eruption affect the gravity wave activity in the lower ionosphere?, Studia geopg. et geod., 42, 170–182, 1998.
Portmann, R. W., G. E. Thomas, S. Solomon, and R. R. Garcia, The importance of dynamical feedbacks on doubled CO2-induced changes in the thermal structure of the mesosphere, Geophys. Res. Lett., 22, 1733–1736, 1995.
Rind, D., R. Suozzo, N. K. Balachandran, and M. J. Prather, Climate change and the middle atmosphere: The doubled CO2 climate, J. Atmos. Sci., 47, 475–494, 1990.
Rind, D., N. K. Balachandran, and R. Suozzo, Climate change and the middle atmosphere. Part II: the impact of valcanic aerosols, J. Climate, 5, 189–208, 1992.
Roble, R. G. and R. E. Dickinson, How will changes in carbon dioxide and methane modify the mean structure of the mesosphere andthermosphere?, Geophys. Res. Lett., 16, 1441–1444, 1989.
Roble, R. G. and C. E. Ridley, A thermosphere-ionosphere-mesosphere-electrodynamics general circulation model (TIME-GCM), Geophys. Res. Lett., 21, 417–420, 1994.
She, C. Y. and U. von Zahn, The concept of two-level mesopause: Support through new lidar observation, J. Geophys. Res., 103, 5855–5863, 1998.
She, C. Y., H. Latifi, J. R. Yu, R. J. Alvarez, II, R. E. Bills, and C. S. Gardner, Two-frequency lidar technique for mesospheric Na temperature measurements, Geophys. Res. Lett., 17, 929–932, 1990.
She, C. Y., S. W. Thiel, and D. A. Krueger, Observed episodic warming at 86 and 100 km between 1990 and 1997: Effects of Mount Pinatubo eruption, Geophys. Res. Lett., 25, 497–500, 1998.
States, R. J. and C. S. Gardner, Influence of the diurnal tide and thermospheric heat sources on the formation of mesospheric inversion layers, Geophys. Res. Lett., 25, 1483–1486, 1998.
Williams, B. P., C. Y. She, and R. G. Roble, Seasonal climatology of the nighttime tidal perturbation of temperature in the midlatitude mesopause region, Geophys. Res. Lett., 25, 3301–3304, 1998.
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Krueger, D.A., She, C.Y. Observed “long-term” temperature change in a midlatitude mesopause region in response to external perturbations. Earth Planet Sp 51, 809–814 (1999). https://doi.org/10.1186/BF03353239
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DOI: https://doi.org/10.1186/BF03353239