Polar mesosphere summer echoes with ESRAD, Kiruna, Sweden: Variations and trends over 1997-2008
Polar mesosphere summer echoes with ESRAD, Kiruna, Sweden: Variations and trends over 1997-2008
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极地中间层夏季与瑞典基律纳 ESRAD 相呼应：1997-2008 年的变化和趋势
DOI：
10.1016/j.jastp.2009.12.014
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发表时间：
2010
影响因子：
1.9
通讯作者：
Smirnova M
中科院分区：
文献类型：
--
作者：
Smirnova M
利用1997 ~ 2008年瑞典北部MST雷达ESRAD的极层夏季回波（PMSE）观测资料，研究了极层夏季回波的日、日和年变化。在日尺度上，PMSE的发生率和体积反射率以半日变化为主，日曲线的年际变化较小。PMSE的日变化和年际变化与地磁活动相关，而与中间层温度或太阳活动无关。PMSE发生率和PMSE季节长度在观测区间内无统计学意义变化。
Measurements of Polar Mesosphere Summer Echoes (PMSE) with the MST radar ESRAD, in northern Sweden, from 1997 to 2008, were used to study diurnal, day-to-day and year-to-year variations of PMSE. The PMSE occurrence rate and volume reflectivity on a daily scale show predominantly semidiurnal variations with small interannual variability in the shape of the diurnal curves. Day-to-day and interannual variations of PMSE are found to correlate with geomagnetic activity while they do not correlate with mesopause temperature or solar activity. No statistically significant trends in PMSE occurrence rate and length of PMSE season were detected over the observation interval.