排序方式： 共有5条查询结果，搜索用时 156 毫秒
1
1.
The main features of upper atmosphere dynamics as an important part of upper atmosphere climatology are presented. The dynamics
of the mesosphere and lower thermosphere (MLT) are of special interest. The results are based on the long series of investigations
in East Siberia and data from a world-wide network of observatories. We present the regional climatic norms for the prevailing
wind and semi-diurnal tide and the main features of the quasi-periodic structure of the wind field. The non-zonality of MLT
dynamics is demonstrated as well as regional differences in the response of the wind field to stratospheric disturbances,
solar activity variations and geomagnetic storms. 相似文献
2.
The results of a periodogramanalysis of the variations in the ionospheric parameters, measured using the vertical radio sounding
method at midlatitude Irkutsk observatory (Eastern Siberia), are presented. The 1984–1986 period of observations was used.
It has been indicated that the statistically significant oscillations with periods typical of planetary waves are present
in the variations in f
0Es, f
bEs, h′Es, f
min, f
0F2, and h′F. 相似文献
3.
The results of a periodogramanalysis of the variations in the ionospheric parameters, measured using the vertical radio sounding method at midlatitude Irkutsk observatory (Eastern Siberia), are presented. The 1984–1986 period of observations was used. It has been indicated that the statistically significant oscillations with periods typical of planetary waves are present in the variations in f 0Es, f bEs, h′Es, f min, f 0F2, and h′F.
相似文献4.
The occurrence frequency of extremely large and extremely small values of the total ozone content (TOC) for Irkutsk, Berlin,
and Saskatoon midlatitude stations (located near 52°N but in different climatic zones) are calculated based on the daily satellite
measurements in the 1978–2005 period. The data for various seasons are presented. The interannual variability and regional
differences are demonstrated. The results indicate that the TOC variability is mainly caused by natural atmospheric processes. 相似文献
5.
The correlation between total ozone content lower thermosphere horizontal wind parameters, and standard indices of solar activity
and geomagnetic activity has been studied. The satellite measurements of TOC for five observatories in Central Europe and
the lower thermosphere wind measurements for Collm observatory (Germany) were used for 1996–2003. The quasi-periodic structure
of these variations and the correlation between the corresponding periodograms were also studied. The quantitative evaluation
of the statistically significant correlations and common periodicities were revealed. 相似文献
1