کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1777306 | 1523662 | 2010 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Observations of noctilucent clouds from Lithuania
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Observations of noctilucent clouds from Lithuania Observations of noctilucent clouds from Lithuania](/preview/png/1777306.png)
چکیده انگلیسی
We present an analysis of systematic visual and photographic observations of noctilucent clouds seen from Lithuania in the years 1973-2009. The main trends in the noctilucent cloud occurrence frequency and the mean brightness are derived from statistical and correlation analysis. A clear signature of the solar activity cycle is imprinted on the noctilucent cloud occurrence frequency and mean brightness, both showing distinct anti-correlation with the sunspot numbers; however, no statistically significant increase of either noctilucent cloud occurrence frequency or brightness has been detected at least over past 19Â yr (1991-2009). The only statistically significant positive trend is established for the numbers of very bright noctilucent cloud displays in the years 1973-2009. The most recent noctilucent cloud observations are linked to variations of local mesospheric temperatures, measured by the Aura satellite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 72, Issues 14â15, September 2010, Pages 1090-1099
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 72, Issues 14â15, September 2010, Pages 1090-1099
نویسندگان
Audrius Dubietis, Peter Dalin, RiÄardas BalÄiÅ«nas, Kazimieras Äernis,