کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1767718 | 1020200 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
16-day wave observed in the meteor winds at low latitudes in the southern hemisphere
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Horizontal winds obtained from meteor radar over Cachoeira Paulista, Brazil (22.7°S, 45.0°W), between April 1999 and April 2004 have been used to investigate the planetary-scale 16-day wave. Spectral analysis shows the presence of bursts in the 12- to 20-day period range, mainly in the zonal component, with enhancements observed during all seasons. The 16-day wave exhibits year-to-year variability, but did not exhibit a clear seasonal behavior. This study reveals that the 16-day wave at 22.7°S was strongest during austral autumn-winter seasons for the years 2002 and 2003, whilst for 1999-2000, 2000-2001 and 2002-2003 16-day wave was strongest during spring-summer seasons. The 16-day wave activity was observed during both winter and summer months over Cachoeira Paulista, and the enhancements seen for summer seasons reinforce the interpretation of inter-hemispheric penetration. During the most intense events in the zonal component, the vertical structure revealed maximum amplitudes of about 14 m/s at 90 km and above and, the vertical phase structure showed descending phase with vertical wavelengths of about 51 ± 11 km.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 38, Issue 11, 2006, Pages 2615-2620
Journal: Advances in Space Research - Volume 38, Issue 11, 2006, Pages 2615-2620
نویسندگان
L.M. Lima, P.P. Batista, B.R. Clemesha, H. Takahashi,