Relevant bibliographies by topics / Equatorial middle atmosphere

Academic literature on the topic 'Equatorial middle atmosphere'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Equatorial middle atmosphere"

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REDDY, C. A. "Equatorial Middle Atmosphere." Journal of geomagnetism and geoelectricity 43, Supplement2 (1991): 695–708. http://dx.doi.org/10.5636/jgg.43.supplement2_695.

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Fouchet, T., S. Guerlet, D. F. Strobel, A. A. Simon-Miller, B. Bézard, and F. M. Flasar. "An equatorial oscillation in Saturn’s middle atmosphere." Nature 453, no. 7192 (May 2008): 200–202. http://dx.doi.org/10.1038/nature06912.

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Sun, Chi-Rong, and Conway Leovy. "Ozone variability in the equatorial middle atmosphere." Journal of Geophysical Research 95, no. D9 (1990): 13829. http://dx.doi.org/10.1029/jd095id09p13829.

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Lieberman, Ruth S. "Nonmigrating Diurnal Tides in the Equatorial Middle Atmosphere." Journal of the Atmospheric Sciences 48, no. 8 (April 1991): 1112–23. http://dx.doi.org/10.1175/1520-0469(1991)048<1112:ndtite>2.0.co;2.

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Fechine, J., A. F. Medeiros, R. A. Buriti, H. Takahashi, and D. Gobbi. "Mesospheric bore events in the equatorial middle atmosphere." Journal of Atmospheric and Solar-Terrestrial Physics 67, no. 17-18 (December 2005): 1774–78. http://dx.doi.org/10.1016/j.jastp.2005.04.006.

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Teng, Chen-Ke-Min, Sheng-Yang Gu, Yusong Qin, and Xiankang Dou. "Impact of Solar Activity on Global Atmospheric Circulation Based on SD-WACCM-X Simulations from 2002 to 2019." Atmosphere 12, no. 11 (November 19, 2021): 1526. http://dx.doi.org/10.3390/atmos12111526.

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In this study, a global atmospheric model, Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere and ionosphere eXtension (SD-WACCM-X), and the residual circulation principle were used to study the global atmospheric circulation from the lower to upper atmosphere (~500 km) from 2002 to 2019. Our analysis shows that the atmospheric circulation is clearly influenced by solar activity, especially in the upper atmosphere, which is mainly characterized by an enhanced atmospheric circulation in years with high solar activity. The atmospheric circulation in the upper atmosphere also exhibits an ~11 year period, and its variation is highly correlated with the temporal variation in the F10.7 solar index during the same time series, with a maximum correlation coefficient of up to more than 0.9. In the middle and lower atmosphere, the impact of solar activity on the atmospheric circulation is not as obvious as in the upper atmosphere due to some atmospheric activities such as the Quasi-Biennial Oscillation (QBO), El Niño–Southern Oscillation (ENSO), sudden stratospheric warming (SSW), volcanic forcing, and so on. By comparing the atmospheric circulation in different latitudinal regions between years with high and low solar activity, we found the atmospheric circulation in mid- and high-latitude regions is more affected by solar activity than in low-latitude and equatorial regions. In addition, clear seasonal variation in atmospheric circulation was detected in the global atmosphere, excluding the regions near 10−4 hPa and the lower atmosphere, which is mainly characterized by a flow from the summer hemisphere to the winter hemisphere. In the middle and low atmosphere, the atmospheric circulation shows a quasi-biennial oscillatory variation in the low-latitude and equatorial regions. This work provides a referable study of global atmospheric circulation and demonstrates the impacts of solar activity on global atmospheric circulation.
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Devanarayanan, S., and K. Mohanakumar. "Sunspot cycle and thermal structure of equatorial middle atmosphere." Journal of Geophysical Research 90, A6 (1985): 5357. http://dx.doi.org/10.1029/ja090ia06p05357.

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Semeniuk, Kirill, and Theodore G. Shepherd. "The Middle-Atmosphere Hadley Circulation and Equatorial Inertial Adjustment." Journal of the Atmospheric Sciences 58, no. 21 (November 2001): 3077–96. http://dx.doi.org/10.1175/1520-0469(2001)058<3077:tmahca>2.0.co;2.

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Vijayan, Lekshmi, and C. A. Reddy. "Radiative damping of equatorial waves in the middle atmosphere." Quarterly Journal of the Royal Meteorological Society 120, no. 519 (July 1994): 1323–43. http://dx.doi.org/10.1002/qj.49712051910.

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Harris, M. J., N. F. Arnold, and A. D. Aylward. "A study into the effect of the diurnal tide on the structure of the background mesosphere and thermosphere using the new coupled middle atmosphere and thermosphere (CMAT) general circulation model." Annales Geophysicae 20, no. 2 (February 28, 2002): 225–35. http://dx.doi.org/10.5194/angeo-20-225-2002.

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Abstract. A new coupled middle atmosphere and thermosphere general circulation model has been developed, and some first results are presented. An investigation into the effects of the diurnal tide upon the mean composition, dynamics and energetics was carried out for equinox conditions. Previous studies have shown that tides deplete mean atomic oxygen in the upper mesosphere-lower thermosphere due to an increased recombination in the tidal displaced air parcels. The model runs presented suggest that the mean residual circulation associated with the tidal dissipation also plays an important role. Stronger lower boundary tidal forcing was seen to increase the equatorial local diurnal maximum of atomic oxygen and the associated 0(1S) 557.7 nm green line volume emission rates. The changes in the mean background temperature structure were found to correspond to changes in the mean circulation and exothermic chemical heating.Key words. Atmospheric composition and structure (middle atmosphere – composition and chemistry) Meterology and atmospheric dynamics (middle atmosphere dynamics; waves and tides)
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Dissertations / Theses on the topic "Equatorial middle atmosphere"

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Drysdale, Euain Fraser. "Modelling of equatorial wave motions in the middle atmosphere." Thesis, University of Oxford, 1998. http://ora.ox.ac.uk/objects/uuid:9ae75869-a15b-465e-af64-c608cca8b34c.

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A three-dimensional mechanistic model of the middle atmosphere is used to model various classes of equatorial wave motions that are observed in the atmosphere. These waves are thought to be largely responsible for the forcing of the quasi-biennial oscillation (QBO) in the tropical lower stratosphere. By generating a combination of different classes of equatorial waves in the model, an oscillation which has many similarities to the observed QBO is produced in the model. The numerical model used is run in a variety of configurations, including running it at different vertical resolutions and with two different radiation parameterisation schemes. It is found that model used in the project must be modified to allow the accurate modelling of equatorial waves. Several modelling problems are encountered while applying the modifications necessary in the model; the steps necessary to rectify these problems are detailed in this thesis. Equatorial waves are then forced in this modified model under a range of conditions and their interaction with the mean flow is observed. Their dissipation mechanisms and the influence of changes in model conditions on these waves are investigated. The model is found to be generally very successful in modelling these equatorial waves. Modelling of the QBO is one of the principle aims of this project and a QBO is successfully generated in a variety of model configurations. The modelled QBO is found to be sensitive to changes in the temperature structure of the model (brought about by changes in the model's radiation scheme) and several experiments are performed in order to learn what processes affect this sensitivity. A QBO is then generated in series of model runs where the state of the model is varied from very idealised (where temperatures in the model are relaxed towards an isothermal state by the radiation scheme) to a state that is far more realistic (a perpetual January run with realistic boundary information). A fairly realistic QBO is generated throughout many of the experiments. The properties of this QBO are investigated and compared to the observed QBO. The model is then run with planetary waves forced in addition to the QBO. The interaction between the planetary waves and the QBO is investigated. It is found that the planetary waves have little effect on the QBO propagation. The QBO however has a fairly strong modulating effect on the planetary waves in certain regions.
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Horinouti, Takeshi. "Excitation of waves by organized cumulus convection and their interaction with the mean flow in the equatorial middle atmosphere." 京都大学 (Kyoto University), 1997. http://hdl.handle.net/2433/202444.

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Books on the topic "Equatorial middle atmosphere"

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India. Meteorological Dept., ed. Climatology of the middle atmosphere over the equatorial region of India (Thumba) (1970-1993). New Delhi: Director General of Meteorology, 1998.

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India. Meteorological Dept., ed. Climatology of the middle atmosphere over the equatorial region of India (Thumba) (1970-1993). New Delhi: Director General of Meteorology, 1998.

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Climatology of the middle atmosphere over the equatorial region of India (Thumba) (1970-1993). New Delhi: Director General of Meteorology, 1998.

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Book chapters on the topic "Equatorial middle atmosphere"

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Vincent, R. A. "Low Frequency Dynamics of the Equatorial Mesosphere." In Coupling Processes in the Lower and Middle Atmosphere, 125–36. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1594-0_8.

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Gray, L. J., and J. A. Pyle. "The Influence of the Semi-Annual and Quasi-Biennial Oscillations on Equatorial Tracer Distributions." In Transport Processes in the Middle Atmosphere, 199–214. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3973-8_14.

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Garcia, Rolando R. "The role of equatorial waves in the semiannual oscillation of the middle Atmosphere." In Atmospheric Science Across the Stratopause, 161–76. Washington, D. C.: American Geophysical Union, 2000. http://dx.doi.org/10.1029/gm123p0161.

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Young, Kenneth R., and Paul E. Berry. "Flora and Vegetation." In The Physical Geography of South America. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195313413.003.0013.

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South America’s shape, size, and geographic position, now and in the past, have acted to influence the development of diverse coverings of land surfaces with plants of different sizes, adaptations, and origins. Underlying geologic structures have been exposed to weathering regimes, thereby resulting in a multiplicity of landforms, soil types, and ecological zones. The most notable large-scale features are the Andes, which curl along the western margin of the continent, and the broad swath of the Amazon lowlands in the equatorial zone. However, there are also extensive, more ancient mountain systems in the Brazilian Shield of east-central Brazil and the Guiana Shield in northern South America. The interplay of environmental factors has given rise to a panoply of vegetation types, from coastal mangroves to interior swamplands, savannas, and other grasslands, deserts, shrublands, and a wide array of dry to moist and lowland to highland forest types. The narrower southern half of South America is also complex vegetationally because of the compression of more vegetation types into a smaller area and the diverse climatic regimes associated with subtropical and temperate middle latitudes. Alexander von Humboldt began to outline the major features of the physical geography of South America in his extensive writings that followed his travels in the early nineteenth century (von Humboldt, 1815–1832). For example, he first documented the profound influences of contemporary and historical geologic processes such as earthquakes and volcanoes, how vegetation in mountainous areas changes as elevation influences the distributions of plant species, and the effect of sea surface temperatures on atmospheric circulation and uplift and their impacts on precipitation and air temperatures (Botting, 1973; Faak and Biermann, 1986). His initial insights, in combination with modern observations (Hueck and Seibert, 1972; Cabrera and Willink, 1973; Davis et al., 1997; Lentz, 2000), still serve to frame our synthesis of the major vegetation formations of South America. In this chapter, we relate vegetation formations to spatial gradients of soil moisture and elevation in the context of broad climatic and topographic patterns.
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Conference papers on the topic "Equatorial middle atmosphere"

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Sharma, Som, Neesha Patel, Narendra Ojha, Vaidehi Joshi, and Sourita Saha. "Satellite and Modelling based Investigations of the Middle Atmospheric Temperature Climatology over the Equatorial Regions." In 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC). IEEE, 2019. http://dx.doi.org/10.23919/ursiap-rasc.2019.8738627.

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