平流层顶以上的中气层(mesosphere),温度随高度的增加而激降。大约在80公里的地方,到达最低。在中气层项,约为堡氏零下95度,是大气中温度的最低点。中气层内,海上升一公里,平均约减摄氏3度。 中气层内空气很洁净,除了偶尔见到有一种夜光(noctilucentclouds)而外,并无任何大气现象。这种云究竟由什么成分组成,到现在还不知道。
该文分析了钻井、射孔、作业和开发生产中气层伤害的主要因素,并提出了针对性的保护措施。
The main factors of the damage in the formations in drilling, perforation, operation and development are analyzed and the corresponding safeguards are suggested in this paper.
到了观看极地中气层云的时候,在太空中使用高β角度,我们能捕捉到日落时刻这层薄薄的夜光云。
It is the season for viewing Polar Mesospheric Clouds, and with our high beta-angle we were able to capture this thin layer of noctilucent clouds at sunset (6-25-2010).
以上这些大气层中,只有对流层(尤其是边界层)中气象参数的垂直分布具有显著的不稳定性的特征。
Of all the above atmospheric layers, only the troposphere (especially its boundary layer) is characterized by a marked instability of the vertical distribution of the meteorological parameters.
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