Observations of noctilucent clouds from Lithuania

被引：15

作者：

Dubietis, Audrius ^{[1
]}

Dalin, Peter ^{[2
]}

Balciunas, Ricardas

Cernis, Kazimieras ^{[3
]}

机构：

[1] Vilnius State Univ, Dept Quantum Elect, LT-10222 Vilnius, Lithuania

[2] Swedish Inst Space Phys, SE-981 Kiruna, Sweden

[3] Vilnius State Univ, Inst Theoret Phys & Astron, LT-01108 Vilnius, Lithuania

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2010年 / 72卷 / 14-15期

关键词：

Noctilucent clouds; Mesosphere dynamics; MESOSPHERIC CLOUDS; GLOBAL CHANGE; MOSCOW; IMPACT; PMCS; ICE;

D O I：

10.1016/j.jastp.2010.07.004

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1090 / 1099

页数：10

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