Thermosphere: Heating, density increase, expansion at high latitude.
热层：加热过程，密度增长，在高纬的扩张。
This is the biggest contraction of the thermosphere in at least 43 years.
这是至少在43年中最大的热大气层收缩。
When solar activity is high, solar extreme ultraviolet rays warm and expand the thermosphere.
当太阳活动剧烈时，太阳极端的紫外线会加热并使热大气层扩张。
Still, the collapse of the thermosphere was bigger than the sun's activity alone can explain.
尽管如此，该热层塌陷是比太阳的活动可以解释的理由还要剧烈。
After the thermosphere is the thermopause, which is the outer most boundary of the thermosphere.
热成层之后是热成层顶，它是热成层的最外边界。
The thermosphere, which blocks harmful ultraviolet rays, expands and contracts regularly due to the sun's activities.
由于太阳的活动，阻挡有害紫外线的热大气层会定期扩张和收缩。
The thermosphere interacts strongly with the sun and hence is greatly influenced by the sun's solar activity, which occurs in cycles.
强烈的热层与太阳交互作用，因此受较大的周期发生的太阳活动影响。
Above the stratosphere, blue layers mark the upper atmosphere (including the mesosphere, thermosphere, ionosphere, and exosphere) as it gradually fades into the blackness of outer space.
在大气层上，蓝色的部分表示上层大气(包括中间层、热层、电离层、外逸层)，它们渐渐消逝到外空间的黑暗中。
When the atomic oxygen density in the mesosphere and lower thermosphere region is derived by means of photochemical model calculations from OH nightglow emissions, a retrieval uncertainty, I.
借助OH夜气辉辐射的光化学模式，由OH夜气辉辐射反演中间层-低热层区域的原子氧数密度时，输入参数的不确定性将导致反演得到的原子氧数密度具有不确定性。
In the course of acoustic-gravity wave (AGW) propagation, a coupling relation between the ozone density oscillations (ODO) and temperature fluctuations (TF) in the lower thermosphere is presented.
本文求出了声重波传播过程中，低热层臭氧含量振荡和温度场起伏间的耦合关系。
In the course of acoustic-gravity wave (AGW) propagation, a coupling relation between the ozone density oscillations (ODO) and temperature fluctuations (TF) in the lower thermosphere is presented.
本文求出了声重波传播过程中，低热层臭氧含量振荡和温度场起伏间的耦合关系。
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