[PDF] Top 20 Effect of planetary waves on cooling the upper mesosphere and lower thermosphere by the CO
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Effect of planetary waves on cooling the upper mesosphere and lower thermosphere by the CO
... per mesosphere and lower thermosphere is found to be 15 K for the ultra-fast Kelvin wave (UFKW) of the ...16-day waves, and 2 K for the 5-day ...the CO 2 15-µm band, averaged over the ... See full document
12
Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events
... March) between January 2000 and December 2008. This has been done following the technique described and validated in Kleinknecht et al. (2014). Briefly, after an initial quality check, daily mean winds are produced by ... See full document
9
ANGEO - The 16-day planetary wave in the mesosphere and lower thermosphere
... MLT-region planetary-wave studies appear to have addressed the quasi 2-day wave because its very large amplitude and comparatively short period make it an attractive subject for investigation by ground-based ... See full document
10
Trends and climatic shifts in mesosphere / lower thermosphere planetary waves Collm (52°N, 15°E)
... Long-term mean wave activity and interannual variability Figure 2 only gives an example of the seasonal behaviour of wind variability in the long-period range. The long-term mean variability of the total standard ... See full document
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Long-term trends and decadal variability of upper mesosphere/lower thermosphere gravity waves at midlatitudes
... The MLT region is accessible to radar wind measurements, although standard methods only deliver limited temporal and thus spectral resolution of GW. On the other hand, however, radar measurements are cost effective, ... See full document
10
ANGEO - Cooling of the mesosphere and lower thermosphere due to doubling of CO2
... the upper boundary dropped by about 30 km with doubled CO 2 ...and upper atmospheric models while observa- tions are often related to geometric ...the lower part of model domain, approximately ... See full document
12
Planetary waves in the upper stratosphere and lower mesosphere during 2009 Arctic major stratospheric warming
... tion planetary wave interactions seem to play a key role in the initiation and progression of major SSWs (Matsuno, ...of waves are observed during the SSW ...and lower mesosphere during the ... See full document
10
A reassessment of SuperDARN meteor echoes from the upper mesosphere and lower thermosphere
... 4.4.1. Regarding the interferometer phase calibration As discussed in Section 2.3 and assessed in Section 3.1, any systematic offsets in the phase measurements made by the Super- DARN main and interferometer antenna ... See full document
15
Production and transport mechanisms of NO in the polar upper mesosphere and lower thermosphere in observations and models
... indirect effect during the geomagnetically quiet NH winter in 2008–2009 has been studied by Funke et ...with upper lid above 120 km and including WACCM4, were shown to typically underestimate upper ... See full document
15
The dynamics of the mesosphere and lower thermosphere: a brief review
... the mesosphere-lower thermosphere (MLT) (60 to 110 km) is dominated by waves and their ...gravity waves, which drives a summer-to-winter pole circulation at the ...the ... See full document
13
Meteor radar observations of atmospheric waves in the equatorial mesosphere/lower thermosphere over Ascension Island
... different waves. The upper plot of ...2-day waves in the entire altitude range are shown in Fig. 13. These are waves with periods 34, 43, 48 and 54 h, while the result for the 67–70-h wave ... See full document
18
Quasi-biennial oscillation influence on long-period planetary waves in the Antarctic upper mesosphere
... the lower thermosphere in the South Atlantic sector of the Antarctic, there has been no clear evidence in the South Pacific ...QBO-modulated planetary wave ...long-period planetary wavefield ... See full document
9
Mean winds, temperatures and the 16- and 5-day planetary waves in the mesosphere and lower thermosphere over Bear Lake Observatory (42° N, 111° W)
... stratosphere, planetary waves drive this circulation and trans- fer momentum by ...the mesosphere the meridional circulation is transferred into a pole-to-pole cell, where air is transported from the ... See full document
15
ANGEO - Vertical velocities associated with gravity waves measured in the mesosphere and lower thermosphere with the EISCAT VHF radar
... 3) but requires a larger data set than currently available for certainty. 5 Vertical-wave number spectra The vertical-velocity pro®les were used to investigate the spectral composition of the wave ®eld in terms of power ... See full document
13
Kelvin waves in stratosphere, mesosphere and lower thermosphere temperatures as observed by TIMED/SABER during 2002–2006
... Kelvin waves are probably masked by temperature residuals associated with gravity waves, planetary waves and day-to-day variability of solar ... See full document
7
Periodicities in energy dissipation rates in the auroral mesosphere/lower thermosphere
... versus 10.7 cm solar flux; bottom left: versus the mean Ap; bottom right: versus PK p . be interpreted as confuting our “decreased convective stabil- ity” hypothesis, since the associated gravity wave dissipation would ... See full document
10
Forcing mechanisms of the 6 h tide in the mesosphere/lower thermosphere
... the effect of windowing the data records before the analysis (Emery and Thomson, ...the upper height gates ...more effect during spring and autumn, when both the TDT and the DT have their maxima ... See full document
7
Periodicities in energy dissipation rates in the auroral mesosphere/lower thermosphere
... versus 10.7 cm solar flux; bottom left: versus the mean Ap; bottom right: versus PK p . be interpreted as confuting our “decreased convective stabil- ity” hypothesis, since the associated gravity wave dissipation would ... See full document
10
Parameters of internal gravity waves in the mesosphere-lower thermosphere region derived from meteor radar wind measurements
... as upper limits of the true ...in upper mesosphere/lower thermosphere studies provides the poten- tial of analysing IGWs and their impact on the background circulation on a global ... See full document
7
Stratospheric warming influence on the mesosphere/lower thermosphere as seen by the extended CMAM
... The results presented have shown that the CMAM-CIN is able to capture both the magnitude and the dynamics of the basic fields and the strong polar vortex during the three SSW below 90–100 km height. The model has also ... See full document
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