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
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
Observations of noctilucent clouds from Lithuania
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 19 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 14–15, September 2010, Pages 1090-1099
نویسندگان
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