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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Dependence of neutral temperatures in the lower thermosphere on geomagnetic activity
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Dependence of neutral temperatures in the lower thermosphere on geomagnetic activity

机译：依赖的中性温度低热电离层对地磁活动

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摘要

The neutral temperature (Tn) in the lower thermosphere has been measured using high-resolution (0.13 nm) N2 Lyman-Birge-Hopfield (LBH) band emissions, taken from the High-Resolution Ionospheric and Thermospheric Spectrograph (HITS) instrument aboard the Advanced Research and Global Observation Satellite (ARGOS). Tn in the lower thermosphere (below ～200 km) has been examined for 12 days in 2000 and 2001. During geomagnetically quiet conditions, the observed HITS temperatures (THITS) as a function of latitude and calculations using the NRLMSISE-00 model are in good agreement. During periods with geomagnetic disturbances, the model temperatures are unable to match the spatial and temporal variations exhibited by the measurements. An analysis of HITS temperatures and measurements of the auroral electrojet index AL indicates that THITS changes typically follow variations in AL obtained between 13 and 18.5 hours earlier. On average, the time delay is 16 hours and 25 min earlier (correlation coefficient of 0.55), yielding the following empirical formula between Tn and AL changes: ΔTn[K] = 2.1 × ΔAL[nT]. Also, the agreement between measured (HITS) and modeled (NRLMSISE-00) Tn values has been investigated for 8 days with similar geomagnetic conditions, yielding a correlation coefficient of 0.75 between the THITS-TMSIS agreement and the previously measured AL.
机译：中性温度低(Tn)热大气层一直用高分辨率N2 Lyman-Birge-Hopfield(0.13海里)(李秉宪饰)带排放,从高分辨率电离层和Thermospheric摄谱仪(点击)仪器上高级研究和全球观测卫星(ARGOS)。(~ 200公里以下)已经检查了12天2000年和2001年。条件下,观察到的温度(,越南)和纬度的函数计算使用NRLMSISE-00模型良好的协议。干扰,模型温度不能与空间和时间变化展出的测量。点击温度和测量极光电喷流指数表明,越南的变化通常遵循AL获得的变化13 - 18.5小时。时间延迟是16小时25分钟(相关系数为0.55),产生的Tn和半岛之间的经验公式变化:ΔTn [K] = 2.1×ΔAL (nT)。(点击)测量和建模之间的协议(NRLMSISE-00) Tn值被追究8天与地磁条件相似,收益率的相关系数为0.75和THITS-TMSIS之间的协议以前测量。

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