Characteristics of the wind, temperature and PMSE field above Davis, Antarctica
Characteristics of the wind, temperature and PMSE field above Davis, Antarctica
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南极洲戴维斯上空的风、温度和 PMSE 场特征
DOI：
10.1016/j.jastp.2005.04.011
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发表时间：
2006
影响因子：
1.9
通讯作者：
I. Reid
中科院分区：
文献类型：
--
作者：
R. Morris;D. Murphy;R. Vincent;D. Holdsworth;A. Klekociuk;I. Reid
2003-2004年夏季，利用55 MHz大气雷达在南极洲高纬戴维斯站（68.6°S）上空探测到极区中间层夏季回波（PMSE）。在本文中，我们研究了在2004年11月19日至2月16日期间观测到的南半球PMSE事件的特征。同时卫星SABER温度测量和地面VHF雷达后向散射观测表明，PMSE存在于中间层温度范围为124.4-134.7K。使用并置VHF和MF雷达测量的水平风场的检查表明，PMSE也发生在向西向纬向风和赤道向纬向风的条件。2003年11月19日（2004年2月16日）观测到的南半球夏季PMSE季节的开始（结束）和赤道向（向极）流动的纬向中层风之间存在显著的相关性。我们提出的证据的半日影响的纬向和纬向潮汐的发生，强度和高度的PMSE事件。文中还考虑了潮汐波、重力波和行星波对PMSE事件的影响。
Polar Mesosphere Summer Echoes (PMSE) were detected above the high-latitude station Davis, Antarctica (68.6°S) using a 55MHz atmospheric radar during the 2003–2004 austral summer. In this paper, we examine the characteristics of southern hemisphere PMSE events observed during the interval 19 November to 16 February 2004. Coincident satellite-SABER temperature measurements and ground-VHF radar backscatter observations revealed that PMSE existed for mesosphere temperatures in the range ∼124.4–134.7K. An examination of the horizontal wind field using collocated VHF and MF radar measurements showed that PMSE also occurred during conditions of westward zonal winds and equatorward meridional winds. A remarkable correlation was evident between the onset (end) of the austral summer PMSE season and equatorward (poleward) flowing meridional mesospheric winds observed for the 19 November 2003 (16 February 2004), respectively. We present evidence of a semidiurnal influence of the meridional and zonal tides on the occurrence, intensity, and altitude of PMSE events. The effects of tidal, gravity and planetary waves on PMSE events are also considered.