کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1777621 | 1021751 | 2009 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Intra-seasonal monthly oscillations in stratospheric NCEP data and model results
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Intra-seasonal monthly oscillations in stratospheric NCEP data and model results Intra-seasonal monthly oscillations in stratospheric NCEP data and model results](/preview/png/1777621.png)
چکیده انگلیسی
Intra-seasonal oscillations (ISO) are observed in the zonal-mean of mesospheric wind and temperature measurements-and the numerical spectral model (NSM) generates such oscillations. Relatively large temperature ISO are evident also in stratospheric CPC (NCEP) data at high latitudes, where the NSM produces amplitudes around 3Â K at 30Â km. Analyzing the NCEP data for the years 1996-2006, we find in Fourier spectra signatures of oscillations with periods between 1.7 and 3 months. With statistical confidence levels exceeding 70%, the spectral features are induced by nonlinear interactions involving the annual and semi-annual variations. The synthesized data show for the 10-year average that the temperature ISO peak in winter, having amplitudes close to 4Â K. The synthesized complete spectrum for periods around 2 months produces oscillations, varying from year to year, which can reach peak amplitudes of 15 and 5Â K respectively at northern and southern polar latitudes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 71, Issue 12, August 2009, Pages 1299-1308
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 71, Issue 12, August 2009, Pages 1299-1308
نویسندگان
H.G. Mayr, J.G. Mengel, F.T. Huang, E.R. Nash,