Structure and seasonal variations of the nocturnal mesospheric K layer at Arecibo
Structure and seasonal variations of the nocturnal mesospheric K layer at Arecibo
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阿雷西博夜间中层 K 层的结构和季节变化
DOI：
10.1002/2017jd026541
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发表时间：
2017-07
影响因子：
4.4
通讯作者：
Zhou Qihou H.
中科院分区：
文献类型：
--
作者：
Yue Xianchang;Friedman Jonathan S.;Wu Xiongbin;Zhou Qihou H.
利用2003年12月至2010年1月在波多黎各（18.35°N，66.75°W）Arecibo观测的160个夜晚的K多普勒激光雷达资料，研究了夜间中层K层的季节变化。背景温度也同时测量的激光雷达，并显示出强烈的半年振荡与最大值发生在春分在所有高度。年平均K密度廓线近似为高斯分布，峰值高度为91.7 km。K柱丰度和质心高度有很强的半年变化，最大值出现在至点。这两个参数与平均背景温度呈负相关，相关系数< 0.5。均方根（RMS）宽度有明显的年振荡，最大宽度出现在5月。质心高度的季节变化与同一地点Fe层的季节变化相似。季节性的温度变化表明显着增强波诱导的向下运输这两个物种在春季和秋季。这解释了在阿雷西博的金属层质心高度和柱丰度的变化，并提供了一个一般机制，以解释在低纬度和中纬度站点测量的所有金属物种的质心高度的季节性变化
We present the seasonal variations of the nocturnal mesospheric potassium (K) layer at Arecibo, Puerto Rico (18.35°N, 66.75°W) from 160 nights of K Doppler lidar observations between December 2003 and January 2010, during which the solar activity is mostly low. The background temperature is also measured simultaneously by the lidar and shows a strong semiannual oscillation with maxima occurring during equinoxes at all altitudes. The annual mean K density profile is approximately Gaussian with a peak altitude of 91.7 km. The K column abundance and the centroid height have strong semiannual variations, with maxima at the solstices. Both parameters are negatively correlated to the mean background temperature with a correlation coefficient < 0.5. The root-mean-square (RMS) width has a distinct annual oscillation with the largest width occurring in May. The seasonal variation of the centroid height is similar to that of the Fe layer at the same site. The seasonal temperature variation indicates significant enhanced wave-induced downward transport for both species during spring and autumn. This explains the metal layer centroid height and column abundance variations at Arecibo and provides a general mechanism to account for the seasonal variations in the centroid height of all metal species measured at low-latitude and midlatitude sites
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影响因子：
--
作者：
J. Friedman;X. Chu
通讯作者：
J. Friedman;X. Chu
影响因子：
--
作者：
X. Chu;C. Gardner;S. Franke
通讯作者：
X. Chu;C. Gardner;S. Franke
影响因子：
62.1
作者：
J. Plane
通讯作者：
J. Plane
DOI：
10.1016/j.jastp.2015.04.013
发表时间：
2015-05
影响因子：
1.9
作者：
T. Viehl;J. Höffner;F. Lübken;J. Plane;B. Kaifler;R. Morris
通讯作者：
T. Viehl;J. Höffner;F. Lübken;J. Plane;B. Kaifler;R. Morris
影响因子：
--
作者：
V. Eska;U. Zahn;J. Plane
通讯作者：
V. Eska;U. Zahn;J. Plane