middle atmosphere
A Simulation Study of the Effect of Geomagnetic Activity on the Global Circulation in the Earth’s Middle Atmosphere
... the middle atmosphere, the non-hydrostatic model of the global wind system of the Earth’s atmosphere, developed earlier in the Polar Geophysical Institute, is ...
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Simultaneous and co-located wind measurements in the middle atmosphere by lidar and rocket-borne techniques
... for Middle Atmosphere Research) ob- servatory in Northern Norway (69 ◦ N), which actually con- sists of a double lidar system and allows temperatures and winds to be measured in two directions ...
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Combined wind measurements by two different lidar instruments in the Arctic middle atmosphere
... 85 km altitude. Compared to a previous study by Baumgarten (2010), we analyzed the data with a time resolution of 1 h only (2 h in the previous study), to investigate signatures of atmospheric gravity waves in the wind ...
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Simulating influences of QBO phases and orographic gravity wave forcing on planetary waves in the middle atmosphere
... Arrows in Fig. 7a show changes in specific EP-flux vectors of stationary PW modes due to OGW effects. At latitudes higher than 30° N and altitudes 30–70 km, one can see northward EP-flux differences in all panels of Fig. ...
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Middle atmosphere effects of the quasi two day wave determined from a General Circulation Model
... In addition to the work mentioned above by Norton and Thuburn (1996) there has only been one other report of the QTDW in a global circulation model. This was by Hunt (1981) who observed a westward propagating zonal ...
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Validation of the radiation pattern of the Middle Atmosphere Alomar Radar System (MAARSY)
... The Middle Atmosphere Alomar Radar System (MAARSY) allows studies with high spatial and temporal resolution in the troposphere/lower stratosphere and in the meso- sphere/lower thermosphere of the Arctic ...
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Simulation of planetary waves and their influence on the zonally averaged circulation in the middle atmosphere
... Upper Atmosphere Research Satellite (UARS) shows a presence of the strong large-scale longitu- dinal variations of the emission rates and horizontal winds in the mesosphere and lower thermosphere (Shepherd et ...
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Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes
... surements, carried out simultaneously, for calibration of the resonant fluorescence analysis (Hedin et al., 2009). A review of techniques for the determination of atomic oxygen den- sities aboard sounding rockets and ...
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Multi year temperature measurements of the middle atmosphere at Chatanika, Alaska (65°N, 147°W)
... of middle atmosphere temperature profile at Eureka both when the vortex is overhead and when it is not. Duck et al. (2000) drew on 99 nights of temperature measurements to show that the upper stratosphere ...
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Satellite observations of middle atmosphere–thermosphere vertical coupling by gravity waves
... the middle atmo- sphere (30–90 km) and GW-induced perturbations in the ...the middle atmosphere, GW momentum fluxes are derived from temperature observations of the Sounding of the At- mosphere using ...
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Longitudinal structure of stationary planetary waves in the middle atmosphere – extraordinary years
... the middle atmosphere meridional circulation is its longitudi- nal ...the middle stratosphere (lower boundary ∼ 50 hPa), upper stratosphere and most of the mesosphere (almost up to about ...
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New experiments to validate the radiation pattern of the Middle Atmosphere Alomar Radar System (MAARSY)
... The Middle Atmosphere Alomar Radar System (MAARSY) is a monostatic radar with an active phased array antenna designed for studies of phenomena in the mesosphere and lower ...
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The global middle-atmosphere aerosol model MAECHAM5-SAM2: comparison with satellite and in-situ observations
... the middle-atmosphere (MA) configuration of the three-dimensional atmospheric general circulation model (AGCM) ...The middle- atmosphere configuration MAECHAM5 has a vertical rep- resentation ...
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MIPAS observations of ozone in the middle atmosphere
... the atmosphere playing a ma- jor role in its energy budget and chemistry, particularly in the stratosphere and upper mesosphere (Brasseur and Solomon, ...its middle atmosphere (MA), noctilucent ...
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Properties of the long-term oscillations in the middle atmosphere based on observations from TIMED/SABER
... The origins of the TO in the zonal mean temperature remain a problem. Several studies has revealed that the tropical stratospheric temperature changes are influenced by several forces including: (1) the solar ...
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Observations in the polar middle atmosphere by rocket borne Rayleigh lidar: First results
... The ALOMAR Rayleigh/Mie/Raman lidar (RMR lidar) is part of the ALOMAR facility (Thrane and von Zahn, 1995; von Zahn, 1997) at Andøya (69.28 ◦ N, 16.01 ◦ E) in Northern Norway and has been developed and is being operated ...
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Simulations of superrotation using a GCM for Venus’ middle atmosphere
... Venus’ middle atmosphere. In this study, a GCM for Venus’ middle atmosphere (VMAGCM) is developed by suitably modifying Earth’s GCM in the similar manner to that for other terrestrial planets ...
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On the evaluation of the phase relation between temperature and wind tides based on ground based measurements and reanalysis data in the middle atmosphere
... Atmospheric waves play a major role in the circulation of the Earth’s atmosphere, as they couple the different atmo- spheric layers. These waves are often generated in the tropo- sphere and propagate to higher ...
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The influence of photochemistry on gravity waves in the middle atmosphere
... Gravity waves are one of the most common wave phenom- ena in the atmosphere. Gravity wave saturation and breaking have been recognized to play an essential role in the large- scale circulation and chemical ...
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A new coupled middle atmosphere and thermosphere general circulation model: Studies of dynamic, energetic and photochemical coupling in the middle and upper atmosphere
... upper atmosphere are {after Meyer [1999]) (i) In situ forcing due to thermospheric energy sources such as EUV and high latitude Joule heating; (ii) Planetary wave modulation of upwardly propagating gravity waves, ...
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